platform/kernel/linux-starfive.git
22 months agoMerge branch 'cls_drop-fix'
David S. Miller [Mon, 2 Jan 2023 13:32:43 +0000 (13:32 +0000)]
Merge branch 'cls_drop-fix'

Jamal Hadi Salim says:

====================
net: dont intepret cls results when asked to drop

It is possible that an error in processing may occur in tcf_classify() which
will result in res.classid being some garbage value. Example of such a code path
is when the classifier goes into a loop due to bad policy. See patch 1/2
for a sample splat.
While the core code reacts correctly and asks the caller to drop the packet
(by returning TC_ACT_SHOT) some callers first intepret the res.class as
a pointer to memory and end up dropping the packet only after some activity with
the pointer. There is likelihood of this resulting in an exploit. So lets fix
all the known qdiscs that behave this way.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: sched: cbq: dont intepret cls results when asked to drop
Jamal Hadi Salim [Sun, 1 Jan 2023 21:57:44 +0000 (16:57 -0500)]
net: sched: cbq: dont intepret cls results when asked to drop

If asked to drop a packet via TC_ACT_SHOT it is unsafe to assume that
res.class contains a valid pointer

Sample splat reported by Kyle Zeng

[    5.405624] 0: reclassify loop, rule prio 0, protocol 800
[    5.406326] ==================================================================
[    5.407240] BUG: KASAN: slab-out-of-bounds in cbq_enqueue+0x54b/0xea0
[    5.407987] Read of size 1 at addr ffff88800e3122aa by task poc/299
[    5.408731]
[    5.408897] CPU: 0 PID: 299 Comm: poc Not tainted 5.10.155+ #15
[    5.409516] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996),
BIOS 1.15.0-1 04/01/2014
[    5.410439] Call Trace:
[    5.410764]  dump_stack+0x87/0xcd
[    5.411153]  print_address_description+0x7a/0x6b0
[    5.411687]  ? vprintk_func+0xb9/0xc0
[    5.411905]  ? printk+0x76/0x96
[    5.412110]  ? cbq_enqueue+0x54b/0xea0
[    5.412323]  kasan_report+0x17d/0x220
[    5.412591]  ? cbq_enqueue+0x54b/0xea0
[    5.412803]  __asan_report_load1_noabort+0x10/0x20
[    5.413119]  cbq_enqueue+0x54b/0xea0
[    5.413400]  ? __kasan_check_write+0x10/0x20
[    5.413679]  __dev_queue_xmit+0x9c0/0x1db0
[    5.413922]  dev_queue_xmit+0xc/0x10
[    5.414136]  ip_finish_output2+0x8bc/0xcd0
[    5.414436]  __ip_finish_output+0x472/0x7a0
[    5.414692]  ip_finish_output+0x5c/0x190
[    5.414940]  ip_output+0x2d8/0x3c0
[    5.415150]  ? ip_mc_finish_output+0x320/0x320
[    5.415429]  __ip_queue_xmit+0x753/0x1760
[    5.415664]  ip_queue_xmit+0x47/0x60
[    5.415874]  __tcp_transmit_skb+0x1ef9/0x34c0
[    5.416129]  tcp_connect+0x1f5e/0x4cb0
[    5.416347]  tcp_v4_connect+0xc8d/0x18c0
[    5.416577]  __inet_stream_connect+0x1ae/0xb40
[    5.416836]  ? local_bh_enable+0x11/0x20
[    5.417066]  ? lock_sock_nested+0x175/0x1d0
[    5.417309]  inet_stream_connect+0x5d/0x90
[    5.417548]  ? __inet_stream_connect+0xb40/0xb40
[    5.417817]  __sys_connect+0x260/0x2b0
[    5.418037]  __x64_sys_connect+0x76/0x80
[    5.418267]  do_syscall_64+0x31/0x50
[    5.418477]  entry_SYSCALL_64_after_hwframe+0x61/0xc6
[    5.418770] RIP: 0033:0x473bb7
[    5.418952] Code: 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00
00 00 90 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2a 00 00
00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 18 89 54 24 0c 48 89 34
24 89
[    5.420046] RSP: 002b:00007fffd20eb0f8 EFLAGS: 00000246 ORIG_RAX:
000000000000002a
[    5.420472] RAX: ffffffffffffffda RBX: 00007fffd20eb578 RCX: 0000000000473bb7
[    5.420872] RDX: 0000000000000010 RSI: 00007fffd20eb110 RDI: 0000000000000007
[    5.421271] RBP: 00007fffd20eb150 R08: 0000000000000001 R09: 0000000000000004
[    5.421671] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
[    5.422071] R13: 00007fffd20eb568 R14: 00000000004fc740 R15: 0000000000000002
[    5.422471]
[    5.422562] Allocated by task 299:
[    5.422782]  __kasan_kmalloc+0x12d/0x160
[    5.423007]  kasan_kmalloc+0x5/0x10
[    5.423208]  kmem_cache_alloc_trace+0x201/0x2e0
[    5.423492]  tcf_proto_create+0x65/0x290
[    5.423721]  tc_new_tfilter+0x137e/0x1830
[    5.423957]  rtnetlink_rcv_msg+0x730/0x9f0
[    5.424197]  netlink_rcv_skb+0x166/0x300
[    5.424428]  rtnetlink_rcv+0x11/0x20
[    5.424639]  netlink_unicast+0x673/0x860
[    5.424870]  netlink_sendmsg+0x6af/0x9f0
[    5.425100]  __sys_sendto+0x58d/0x5a0
[    5.425315]  __x64_sys_sendto+0xda/0xf0
[    5.425539]  do_syscall_64+0x31/0x50
[    5.425764]  entry_SYSCALL_64_after_hwframe+0x61/0xc6
[    5.426065]
[    5.426157] The buggy address belongs to the object at ffff88800e312200
[    5.426157]  which belongs to the cache kmalloc-128 of size 128
[    5.426955] The buggy address is located 42 bytes to the right of
[    5.426955]  128-byte region [ffff88800e312200ffff88800e312280)
[    5.427688] The buggy address belongs to the page:
[    5.427992] page:000000009875fabc refcount:1 mapcount:0
mapping:0000000000000000 index:0x0 pfn:0xe312
[    5.428562] flags: 0x100000000000200(slab)
[    5.428812] raw: 0100000000000200 dead000000000100 dead000000000122
ffff888007843680
[    5.429325] raw: 0000000000000000 0000000000100010 00000001ffffffff
ffff88800e312401
[    5.429875] page dumped because: kasan: bad access detected
[    5.430214] page->mem_cgroup:ffff88800e312401
[    5.430471]
[    5.430564] Memory state around the buggy address:
[    5.430846]  ffff88800e312180: fc fc fc fc fc fc fc fc fc fc fc fc
fc fc fc fc
[    5.431267]  ffff88800e312200: 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 fc
[    5.431705] >ffff88800e312280: fc fc fc fc fc fc fc fc fc fc fc fc
fc fc fc fc
[    5.432123]                                   ^
[    5.432391]  ffff88800e312300: 00 00 00 00 00 00 00 00 00 00 00 00
00 00 00 fc
[    5.432810]  ffff88800e312380: fc fc fc fc fc fc fc fc fc fc fc fc
fc fc fc fc
[    5.433229] ==================================================================
[    5.433648] Disabling lock debugging due to kernel taint

Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Reported-by: Kyle Zeng <zengyhkyle@gmail.com>
Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: sched: atm: dont intepret cls results when asked to drop
Jamal Hadi Salim [Sun, 1 Jan 2023 21:57:43 +0000 (16:57 -0500)]
net: sched: atm: dont intepret cls results when asked to drop

If asked to drop a packet via TC_ACT_SHOT it is unsafe to assume
res.class contains a valid pointer
Fixes: b0188d4dbe5f ("[NET_SCHED]: sch_atm: Lindent")

Signed-off-by: Jamal Hadi Salim <jhs@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agodt-bindings: net: marvell,orion-mdio: Fix examples
Michał Grzelak [Thu, 29 Dec 2022 14:22:19 +0000 (15:22 +0100)]
dt-bindings: net: marvell,orion-mdio: Fix examples

As stated in marvell-orion-mdio.txt deleted in commit 0781434af811f
("dt-bindings: net: orion-mdio: Convert to JSON schema") if
'interrupts' property is present, width of 'reg' should be 0x84.
Otherwise, width of 'reg' should be 0x4. Fix 'examples:' and add
constraints checking whether 'interrupts' property is present
and validate it against fixed values in reg.

Signed-off-by: Michał Grzelak <mig@semihalf.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agodt-bindings: net: sun8i-emac: Add phy-supply property
Samuel Holland [Sat, 31 Dec 2022 22:05:46 +0000 (16:05 -0600)]
dt-bindings: net: sun8i-emac: Add phy-supply property

This property has always been supported by the Linux driver; see
commit 9f93ac8d4085 ("net-next: stmmac: Add dwmac-sun8i"). In fact, the
original driver submission includes the phy-supply code but no mention
of it in the binding, so the omission appears to be accidental. In
addition, the property is documented in the binding for the previous
hardware generation, allwinner,sun7i-a20-gmac.

Document phy-supply in the binding to fix devicetree validation for the
25+ boards that already use this property.

Fixes: 0441bde003be ("dt-bindings: net-next: Add DT bindings documentation for Allwinner dwmac-sun8i")
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ipa: use proper endpoint mask for suspend
Alex Elder [Fri, 30 Dec 2022 22:33:04 +0000 (16:33 -0600)]
net: ipa: use proper endpoint mask for suspend

It is now possible for a system to have more than 32 endpoints.  As
a result, registers related to endpoint suspend are parameterized,
with 32 endpoints represented in one more registers.

In ipa_interrupt_suspend_control(), the IPA_SUSPEND_EN register
offset is determined properly, but the bit mask used still assumes
the number of enpoints won't exceed 32.  This is a bug.  Fix it.

Fixes: f298ba785e2d ("net: ipa: add a parameter to suspend registers")
Signed-off-by: Alex Elder <elder@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoMerge branch 'selftests-fix'
David S. Miller [Sun, 1 Jan 2023 11:59:53 +0000 (11:59 +0000)]
Merge branch 'selftests-fix'

Po-Hsu Lin says:

====================
selftests: net: fix for arp_ndisc_evict_nocarrier test

This patchset will fix a false-positive issue caused by the command in
cleanup_v6() of the arp_ndisc_evict_nocarrier test.

Also, it will make the test to return a non-zero value for any failure
reported in the test for us to avoid false-negative results.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoselftests: net: return non-zero for failures reported in arp_ndisc_evict_nocarrier
Po-Hsu Lin [Fri, 30 Dec 2022 09:18:29 +0000 (17:18 +0800)]
selftests: net: return non-zero for failures reported in arp_ndisc_evict_nocarrier

Return non-zero return value if there is any failure reported in this
script during the test. Otherwise it can only reflect the status of
the last command.

Fixes: f86ca07eb531 ("selftests: net: add arp_ndisc_evict_nocarrier")
Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoselftests: net: fix cleanup_v6() for arp_ndisc_evict_nocarrier
Po-Hsu Lin [Fri, 30 Dec 2022 09:18:28 +0000 (17:18 +0800)]
selftests: net: fix cleanup_v6() for arp_ndisc_evict_nocarrier

The cleanup_v6() will cause the arp_ndisc_evict_nocarrier script exit
with 255 (No such file or directory), even the tests are good:

 # selftests: net: arp_ndisc_evict_nocarrier.sh
 # run arp_evict_nocarrier=1 test
 # RTNETLINK answers: File exists
 # ok
 # run arp_evict_nocarrier=0 test
 # RTNETLINK answers: File exists
 # ok
 # run all.arp_evict_nocarrier=0 test
 # RTNETLINK answers: File exists
 # ok
 # run ndisc_evict_nocarrier=1 test
 # ok
 # run ndisc_evict_nocarrier=0 test
 # ok
 # run all.ndisc_evict_nocarrier=0 test
 # ok
 not ok 1 selftests: net: arp_ndisc_evict_nocarrier.sh # exit=255

This is because it's trying to modify the parameter for ipv4 instead.

Also, tests for ipv6 (run_ndisc_evict_nocarrier_enabled() and
run_ndisc_evict_nocarrier_disabled() are working on veth1, reflect
this fact in cleanup_v6().

Fixes: f86ca07eb531 ("selftests: net: add arp_ndisc_evict_nocarrier")
Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: phy: Update documentation for get_rate_matching
Sean Anderson [Thu, 29 Dec 2022 20:21:20 +0000 (15:21 -0500)]
net: phy: Update documentation for get_rate_matching

Now that phylink no longer calls phy_get_rate_matching with
PHY_INTERFACE_MODE_NA, phys no longer need to support it. Remove the
documentation mandating support.

Fixes: 7642cc28fd37 ("net: phylink: fix PHY validation with rate adaption")
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoMerge branch 'dsa-qca8k-fixes'
David S. Miller [Sun, 1 Jan 2023 09:27:12 +0000 (09:27 +0000)]
Merge branch 'dsa-qca8k-fixes'

Christian Marangi says:

====================
net: dsa: qca8k: multiple fix on mdio read/write

Due to some problems in reading the Documentation and elaborating it
some wrong assumption were done. The error was reported and notice only
now due to how things are setup in the code flow.

First 2 patch fix mgmt eth where the lenght calculation is very
confusing and in step of word size. (the related commit description have
an extensive description about how this mess works)

Last 3 patch revert the broken mdio cache and apply a correct version
that should still save some extra mdio in phy poll secnario.

These 5 patch fix each related problem and apply what the Documentation
actually say.

Changes v2:
- Add cover letter
- Fix typo in revert patch
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: dsa: qca8k: improve mdio master read/write by using single lo/hi
Christian Marangi [Thu, 29 Dec 2022 16:33:36 +0000 (17:33 +0100)]
net: dsa: qca8k: improve mdio master read/write by using single lo/hi

Improve mdio master read/write by using singe mii read/write lo/hi.

In a read and write we need to poll the mdio master regs in a busy loop
to check for a specific bit present in the upper half of the reg. We can
ignore the other half since it won't contain useful data. This will save
an additional useless read for each read and write operation.

In a read operation the returned data is present in the mdio master reg
lower half. We can ignore the other half since it won't contain useful
data. This will save an additional useless read for each read operation.

In a read operation it's needed to just set the hi half of the mdio
master reg as the lo half will be replaced by the result. This will save
an additional useless write for each read operation.

Tested-by: Ronald Wahl <ronald.wahl@raritan.com>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: dsa: qca8k: introduce single mii read/write lo/hi
Christian Marangi [Thu, 29 Dec 2022 16:33:35 +0000 (17:33 +0100)]
net: dsa: qca8k: introduce single mii read/write lo/hi

It may be useful to read/write just the lo or hi half of a reg.

This is especially useful for phy poll with the use of mdio master.
The mdio master reg is composed by the first 16 bit related to setup and
the other half with the returned data or data to write.

Refactor the mii function to permit single mii read/write of lo or hi
half of the reg.

Tested-by: Ronald Wahl <ronald.wahl@raritan.com>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoRevert "net: dsa: qca8k: cache lo and hi for mdio write"
Christian Marangi [Thu, 29 Dec 2022 16:33:34 +0000 (17:33 +0100)]
Revert "net: dsa: qca8k: cache lo and hi for mdio write"

This reverts commit 2481d206fae7884cd07014fd1318e63af35e99eb.

The Documentation is very confusing about the topic.
The cache logic for hi and lo is wrong and actually miss some regs to be
actually written.

What the Documentation actually intended was that it's possible to skip
writing hi OR lo if half of the reg is not needed to be written or read.

Revert the change in favor of a better and correct implementation.

Reported-by: Ronald Wahl <ronald.wahl@raritan.com>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Cc: stable@vger.kernel.org # v5.18+
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: dsa: tag_qca: fix wrong MGMT_DATA2 size
Christian Marangi [Thu, 29 Dec 2022 16:33:33 +0000 (17:33 +0100)]
net: dsa: tag_qca: fix wrong MGMT_DATA2 size

It was discovered that MGMT_DATA2 can contain up to 28 bytes of data
instead of the 12 bytes written in the Documentation by accounting the
limit of 16 bytes declared in Documentation subtracting the first 4 byte
in the packet header.

Update the define with the real world value.

Tested-by: Ronald Wahl <ronald.wahl@raritan.com>
Fixes: c2ee8181fddb ("net: dsa: tag_qca: add define for handling mgmt Ethernet packet")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Cc: stable@vger.kernel.org # v5.18+
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: dsa: qca8k: fix wrong length value for mgmt eth packet
Christian Marangi [Thu, 29 Dec 2022 16:33:32 +0000 (17:33 +0100)]
net: dsa: qca8k: fix wrong length value for mgmt eth packet

The assumption that Documentation was right about how this value work was
wrong. It was discovered that the length value of the mgmt header is in
step of word size.

As an example to process 4 byte of data the correct length to set is 2.
To process 8 byte 4, 12 byte 6, 16 byte 8...

Odd values will always return the next size on the ack packet.
(length of 3 (6 byte) will always return 8 bytes of data)

This means that a value of 15 (0xf) actually means reading/writing 32 bytes
of data instead of 16 bytes. This behaviour is totally absent and not
documented in the switch Documentation.

In fact from Documentation the max value that mgmt eth can process is
16 byte of data while in reality it can process 32 bytes at once.

To handle this we always round up the length after deviding it for word
size. We check if the result is odd and we round another time to align
to what the switch will provide in the ack packet.
The workaround for the length limit of 15 is still needed as the length
reg max value is 0xf(15)

Reported-by: Ronald Wahl <ronald.wahl@raritan.com>
Tested-by: Ronald Wahl <ronald.wahl@raritan.com>
Fixes: 90386223f44e ("net: dsa: qca8k: add support for larger read/write size with mgmt Ethernet")
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Cc: stable@vger.kernel.org # v5.18+
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: phy: xgmiitorgmii: Fix refcount leak in xgmiitorgmii_probe
Miaoqian Lin [Thu, 29 Dec 2022 06:29:25 +0000 (10:29 +0400)]
net: phy: xgmiitorgmii: Fix refcount leak in xgmiitorgmii_probe

of_phy_find_device() return device node with refcount incremented.
Call put_device() to relese it when not needed anymore.

Fixes: ab4e6ee578e8 ("net: phy: xgmiitorgmii: Check phy_driver ready before accessing")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoMerge branch 'ena-fixes'
David S. Miller [Fri, 30 Dec 2022 07:43:44 +0000 (07:43 +0000)]
Merge branch 'ena-fixes'

David Arinzon says:

====================
ENA driver bug fixes
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ena: Update NUMA TPH hint register upon NUMA node update
David Arinzon [Thu, 29 Dec 2022 07:30:11 +0000 (07:30 +0000)]
net: ena: Update NUMA TPH hint register upon NUMA node update

The device supports a PCIe optimization hint, which indicates on
which NUMA the queue is currently processed. This hint is utilized
by PCIe in order to reduce its access time by accessing the
correct NUMA resources and maintaining cache coherence.

The driver calls the register update for the hint (called TPH -
TLP Processing Hint) during the NAPI loop.

Though the update is expected upon a NUMA change (when a queue
is moved from one NUMA to the other), the current logic performs
a register update when the queue is moved to a different CPU,
but the CPU is not necessarily in a different NUMA.

The changes include:
1. Performing the TPH update only when the queue has switched
a NUMA node.
2. Moving the TPH update call to be triggered only when NAPI was
scheduled from interrupt context, as opposed to a busy-polling loop.
This is due to the fact that during busy-polling, the frequency
of CPU switches for a particular queue is significantly higher,
thus, the likelihood to switch NUMA is much higher. Therefore,
providing the frequent updates to the device upon a NUMA update
are unlikely to be beneficial.

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: David Arinzon <darinzon@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ena: Set default value for RX interrupt moderation
David Arinzon [Thu, 29 Dec 2022 07:30:10 +0000 (07:30 +0000)]
net: ena: Set default value for RX interrupt moderation

RX ring can be NULL in XDP use cases where only TX queues
are configured. In this scenario, the RX interrupt moderation
value sent to the device remains in its default value of 0.

In this change, setting the default value of the RX interrupt
moderation to be the same as of the TX.

Fixes: 548c4940b9f1 ("net: ena: Implement XDP_TX action")
Signed-off-by: David Arinzon <darinzon@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ena: Fix rx_copybreak value update
David Arinzon [Thu, 29 Dec 2022 07:30:09 +0000 (07:30 +0000)]
net: ena: Fix rx_copybreak value update

Make the upper bound on rx_copybreak tighter, by
making sure it is smaller than the minimum of mtu and
ENA_PAGE_SIZE. With the current upper bound of mtu,
rx_copybreak can be larger than a page. Such large
rx_copybreak will not bring any performance benefit to
the user and therefore makes no sense.

In addition, the value update was only reflected in
the adapter structure, but not applied for each ring,
causing it to not take effect.

Fixes: 1738cd3ed342 ("net: ena: Add a driver for Amazon Elastic Network Adapters (ENA)")
Signed-off-by: Osama Abboud <osamaabb@amazon.com>
Signed-off-by: Arthur Kiyanovski <akiyano@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ena: Use bitmask to indicate packet redirection
David Arinzon [Thu, 29 Dec 2022 07:30:08 +0000 (07:30 +0000)]
net: ena: Use bitmask to indicate packet redirection

Redirecting packets with XDP Redirect is done in two phases:
1. A packet is passed by the driver to the kernel using
   xdp_do_redirect().
2. After finishing polling for new packets the driver lets the kernel
   know that it can now process the redirected packet using
   xdp_do_flush_map().
   The packets' redirection is handled in the napi context of the
   queue that called xdp_do_redirect()

To avoid calling xdp_do_flush_map() each time the driver first checks
whether any packets were redirected, using
xdp_flags |= xdp_verdict;
and
if (xdp_flags & XDP_REDIRECT)
    xdp_do_flush_map()

essentially treating XDP instructions as a bitmask, which isn't the case:
    enum xdp_action {
    XDP_ABORTED = 0,
    XDP_DROP,
    XDP_PASS,
    XDP_TX,
    XDP_REDIRECT,
    };

Given the current possible values of xdp_action, the current design
doesn't have a bug (since XDP_REDIRECT = 100b), but it is still
flawed.

This patch makes the driver use a bitmask instead, to avoid future
issues.

Fixes: a318c70ad152 ("net: ena: introduce XDP redirect implementation")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ena: Account for the number of processed bytes in XDP
David Arinzon [Thu, 29 Dec 2022 07:30:07 +0000 (07:30 +0000)]
net: ena: Account for the number of processed bytes in XDP

The size of packets that were forwarded or dropped by XDP wasn't added
to the total processed bytes statistic.

Fixes: 548c4940b9f1 ("net: ena: Implement XDP_TX action")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ena: Don't register memory info on XDP exchange
David Arinzon [Thu, 29 Dec 2022 07:30:06 +0000 (07:30 +0000)]
net: ena: Don't register memory info on XDP exchange

Since the queues aren't destroyed when we only exchange XDP programs,
there's no need to re-register them again.

Fixes: 548c4940b9f1 ("net: ena: Implement XDP_TX action")
Signed-off-by: Shay Agroskin <shayagr@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ena: Fix toeplitz initial hash value
David Arinzon [Thu, 29 Dec 2022 07:30:05 +0000 (07:30 +0000)]
net: ena: Fix toeplitz initial hash value

On driver initialization, RSS hash initial value is set to zero,
instead of the default value. This happens because we pass NULL as
the RSS key parameter, which caused us to never initialize
the RSS hash value.

This patch fixes it by making sure the initial value is set, no matter
what the value of the RSS key is.

Fixes: 91a65b7d3ed8 ("net: ena: fix potential crash when rxfh key is NULL")
Signed-off-by: Nati Koler <nkoler@amazon.com>
Signed-off-by: David Arinzon <darinzon@amazon.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoselftests: net: fix cmsg_so_mark.sh test hang
Po-Hsu Lin [Thu, 29 Dec 2022 05:41:06 +0000 (13:41 +0800)]
selftests: net: fix cmsg_so_mark.sh test hang

This cmsg_so_mark.sh test will hang on non-amd64 systems because of the
infinity loop for argument parsing in cmsg_sender.

Variable "o" in cs_parse_args() for taking getopt() should be an int,
otherwise it will be 255 when getopt() returns -1 on non-amd64 system
and thus causing infinity loop.

Link: https://lore.kernel.org/lkml/CA+G9fYsM2k7mrF7W4V_TrZ-qDauWM394=8yEJ=-t1oUg8_40YA@mail.gmail.com/t/
Signed-off-by: Po-Hsu Lin <po-hsu.lin@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoMerge tag 'mlx5-fixes-2022-12-28' of git://git.kernel.org/pub/scm/linux/kernel/git...
David S. Miller [Fri, 30 Dec 2022 07:33:55 +0000 (07:33 +0000)]
Merge tag 'mlx5-fixes-2022-12-28' of git://git./linux/kernel/git/saeed/linux

mlx5-fixes-2022-12-28

22 months agonet: amd-xgbe: add missed tasklet_kill
Jiguang Xiao [Wed, 28 Dec 2022 08:14:47 +0000 (16:14 +0800)]
net: amd-xgbe: add missed tasklet_kill

The driver does not call tasklet_kill in several places.
Add the calls to fix it.

Fixes: 85b85c853401 ("amd-xgbe: Re-issue interrupt if interrupt status not cleared")
Signed-off-by: Jiguang Xiao <jiguang.xiao@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: hns3: refine the handling for VF heartbeat
Jian Shen [Wed, 28 Dec 2022 06:27:49 +0000 (14:27 +0800)]
net: hns3: refine the handling for VF heartbeat

Currently, the PF check the VF alive by the KEEP_ALVE
mailbox from VF. VF keep sending the mailbox per 2
seconds. Once PF lost the mailbox for more than 8
seconds, it will regards the VF is abnormal, and stop
notifying the state change to VF, include link state,
vf mac, reset, even though it receives the KEEP_ALIVE
mailbox again. It's inreasonable.

This patch fixes it. PF will record the state change which
need to notify VF when lost the VF's KEEP_ALIVE mailbox.
And notify VF when receive the mailbox again. Introduce a
new flag HCLGE_VPORT_STATE_INITED, used to distinguish the
case whether VF driver loaded or not. For VF will query
these states when initializing, so it's unnecessary to
notify it in this case.

Fixes: aa5c4f175be6 ("net: hns3: add reset handling for VF when doing PF reset")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Hao Lan <lanhao@huawei.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ethernet: freescale: enetc: Drop empty platform remove function
Uwe Kleine-König [Tue, 27 Dec 2022 21:45:08 +0000 (22:45 +0100)]
net: ethernet: freescale: enetc: Drop empty platform remove function

A remove callback just returning 0 is equivalent to no remove callback
at all. So drop the useless function.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ethernet: broadcom: bcm63xx_enet: Drop empty platform remove function
Uwe Kleine-König [Tue, 27 Dec 2022 21:45:07 +0000 (22:45 +0100)]
net: ethernet: broadcom: bcm63xx_enet: Drop empty platform remove function

A remove callback just returning 0 is equivalent to no remove callback
at all. So drop the useless function.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoMerge branch 'tcp-bhash2-fixes'
David S. Miller [Fri, 30 Dec 2022 07:25:53 +0000 (07:25 +0000)]
Merge branch 'tcp-bhash2-fixes'

Kuniyuki Iwashima says:

===================
tcp: Fix bhash2 and TIME_WAIT regression.

We forgot to add twsk to bhash2.  Therefore TIME_WAIT sockets cannot
prevent bind() to the same local address and port.

Changes:
  v1:
    * Patch 1:
      * Add tw_bind2_node in inet_timewait_sock instead of
        moving sk_bind2_node from struct sock to struct
sock_common.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agotcp: Add selftest for bind() and TIME_WAIT.
Kuniyuki Iwashima [Mon, 26 Dec 2022 13:27:53 +0000 (22:27 +0900)]
tcp: Add selftest for bind() and TIME_WAIT.

bhash2 split the bind() validation logic into wildcard and non-wildcard
cases.  Let's add a test to catch future regression.

Before the previous patch:

  # ./bind_timewait
  TAP version 13
  1..2
  # Starting 2 tests from 3 test cases.
  #  RUN           bind_timewait.localhost.1 ...
  # bind_timewait.c:87:1:Expected ret (0) == -1 (-1)
  # 1: Test terminated by assertion
  #          FAIL  bind_timewait.localhost.1
  not ok 1 bind_timewait.localhost.1
  #  RUN           bind_timewait.addrany.1 ...
  #            OK  bind_timewait.addrany.1
  ok 2 bind_timewait.addrany.1
  # FAILED: 1 / 2 tests passed.
  # Totals: pass:1 fail:1 xfail:0 xpass:0 skip:0 error:0

After:

  # ./bind_timewait
  TAP version 13
  1..2
  # Starting 2 tests from 3 test cases.
  #  RUN           bind_timewait.localhost.1 ...
  #            OK  bind_timewait.localhost.1
  ok 1 bind_timewait.localhost.1
  #  RUN           bind_timewait.addrany.1 ...
  #            OK  bind_timewait.addrany.1
  ok 2 bind_timewait.addrany.1
  # PASSED: 2 / 2 tests passed.
  # Totals: pass:2 fail:0 xfail:0 xpass:0 skip:0 error:0

Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Acked-by: Joanne Koong <joannelkoong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agotcp: Add TIME_WAIT sockets in bhash2.
Kuniyuki Iwashima [Mon, 26 Dec 2022 13:27:52 +0000 (22:27 +0900)]
tcp: Add TIME_WAIT sockets in bhash2.

Jiri Slaby reported regression of bind() with a simple repro. [0]

The repro creates a TIME_WAIT socket and tries to bind() a new socket
with the same local address and port.  Before commit 28044fc1d495 ("net:
Add a bhash2 table hashed by port and address"), the bind() failed with
-EADDRINUSE, but now it succeeds.

The cited commit should have put TIME_WAIT sockets into bhash2; otherwise,
inet_bhash2_conflict() misses TIME_WAIT sockets when validating bind()
requests if the address is not a wildcard one.

The straight option is to move sk_bind2_node from struct sock to struct
sock_common to add twsk to bhash2 as implemented as RFC. [1]  However, the
binary layout change in the struct sock could affect performances moving
hot fields on different cachelines.

To avoid that, we add another TIME_WAIT list in inet_bind2_bucket and check
it while validating bind().

[0]: https://lore.kernel.org/netdev/6b971a4e-c7d8-411e-1f92-fda29b5b2fb9@kernel.org/
[1]: https://lore.kernel.org/netdev/20221221151258.25748-2-kuniyu@amazon.com/

Fixes: 28044fc1d495 ("net: Add a bhash2 table hashed by port and address")
Reported-by: Jiri Slaby <jirislaby@kernel.org>
Suggested-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Kuniyuki Iwashima <kuniyu@amazon.com>
Acked-by: Joanne Koong <joannelkoong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet/mlx5: Lag, fix failure to cancel delayed bond work
Eli Cohen [Thu, 15 Dec 2022 12:28:34 +0000 (14:28 +0200)]
net/mlx5: Lag, fix failure to cancel delayed bond work

Commit 0d4e8ed139d8 ("net/mlx5: Lag, avoid lockdep warnings")
accidentally removed a call to cancel delayed bond work thus it may
cause queued delay to expire and fall on an already destroyed work
queue.

Fix by restoring the call cancel_delayed_work_sync() before
destroying the workqueue.

This prevents call trace such as this:

[  329.230417] BUG: kernel NULL pointer dereference, address: 0000000000000000
 [  329.231444] #PF: supervisor write access in kernel mode
 [  329.232233] #PF: error_code(0x0002) - not-present page
 [  329.233007] PGD 0 P4D 0
 [  329.233476] Oops: 0002 [#1] SMP
 [  329.234012] CPU: 5 PID: 145 Comm: kworker/u20:4 Tainted: G OE      6.0.0-rc5_mlnx #1
 [  329.235282] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
 [  329.236868] Workqueue: mlx5_cmd_0000:08:00.1 cmd_work_handler [mlx5_core]
 [  329.237886] RIP: 0010:_raw_spin_lock+0xc/0x20
 [  329.238585] Code: f0 0f b1 17 75 02 f3 c3 89 c6 e9 6f 3c 5f ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1f 44 00 00 31 c0 ba 01 00 00 00 <f0> 0f b1 17 75 02 f3 c3 89 c6 e9 45 3c 5f ff 0f 1f 44 00 00 0f 1f
 [  329.241156] RSP: 0018:ffffc900001b0e98 EFLAGS: 00010046
 [  329.241940] RAX: 0000000000000000 RBX: ffffffff82374ae0 RCX: 0000000000000000
 [  329.242954] RDX: 0000000000000001 RSI: 0000000000000014 RDI: 0000000000000000
 [  329.243974] RBP: ffff888106ccf000 R08: ffff8881004000c8 R09: ffff888100400000
 [  329.244990] R10: 0000000000000000 R11: ffffffff826669f8 R12: 0000000000002000
 [  329.246009] R13: 0000000000000005 R14: ffff888100aa7ce0 R15: ffff88852ca80000
 [  329.247030] FS:  0000000000000000(0000) GS:ffff88852ca80000(0000) knlGS:0000000000000000
 [  329.248260] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
 [  329.249111] CR2: 0000000000000000 CR3: 000000016d675001 CR4: 0000000000770ee0
 [  329.250133] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
 [  329.251152] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
 [  329.252176] PKRU: 55555554

Fixes: 0d4e8ed139d8 ("net/mlx5: Lag, avoid lockdep warnings")
Signed-off-by: Eli Cohen <elic@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
22 months agonet/mlx5e: Set geneve_tlv_option_0_exist when matching on geneve option
Maor Dickman [Sun, 1 Aug 2021 11:45:17 +0000 (14:45 +0300)]
net/mlx5e: Set geneve_tlv_option_0_exist when matching on geneve option

The cited patch added support of matching on geneve option by setting
geneve_tlv_option_0_data mask and key but didn't set geneve_tlv_option_0_exist
bit which is required on some HWs when matching geneve_tlv_option_0_data parameter,
this may cause in some cases for packets to wrongly match on rules with different
geneve option.

Example of such case is packet with geneve_tlv_object class=789 and data=456
will wrongly match on rule with match geneve_tlv_object class=123 and data=456.

Fix it by setting geneve_tlv_option_0_exist bit when supported by the HW when matching
on geneve_tlv_option_0_data parameter.

Fixes: 9272e3df3023 ("net/mlx5e: Geneve, Add support for encap/decap flows offload")
Signed-off-by: Maor Dickman <maord@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
22 months agonet/mlx5e: Fix hw mtu initializing at XDP SQ allocation
Adham Faris [Wed, 14 Dec 2022 14:02:57 +0000 (16:02 +0200)]
net/mlx5e: Fix hw mtu initializing at XDP SQ allocation

Current xdp xmit functions logic (mlx5e_xmit_xdp_frame_mpwqe or
mlx5e_xmit_xdp_frame), validates xdp packet length by comparing it to
hw mtu (configured at xdp sq allocation) before xmiting it. This check
does not account for ethernet fcs length (calculated and filled by the
nic). Hence, when we try sending packets with length > (hw-mtu -
ethernet-fcs-size), the device port drops it and tx_errors_phy is
incremented. Desired behavior is to catch these packets and drop them
by the driver.

Fix this behavior in XDP SQ allocation function (mlx5e_alloc_xdpsq) by
subtracting ethernet FCS header size (4 Bytes) from current hw mtu
value, since ethernet FCS is calculated and written to ethernet frames
by the nic.

Fixes: d8bec2b29a82 ("net/mlx5e: Support bpf_xdp_adjust_head()")
Signed-off-by: Adham Faris <afaris@nvidia.com>
Reviewed-by: Tariq Toukan <tariqt@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
22 months agonet/mlx5e: Always clear dest encap in neigh-update-del
Chris Mi [Mon, 5 Dec 2022 01:22:50 +0000 (09:22 +0800)]
net/mlx5e: Always clear dest encap in neigh-update-del

The cited commit introduced a bug for multiple encapsulations flow.
If one dest encap becomes invalid, the flow is set slow path flag.
But when other dests encap become invalid, they are not cleared due
to slow path flag of the flow. When neigh-update-add is running, it
will use invalid encap.

Fix it by checking slow path flag after clearing dest encap.

Fixes: 9a5f9cc794e1 ("net/mlx5e: Fix possible use-after-free deleting fdb rule")
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
22 months agonet/mlx5e: CT: Fix ct debugfs folder name
Chris Mi [Mon, 28 Nov 2022 05:54:29 +0000 (13:54 +0800)]
net/mlx5e: CT: Fix ct debugfs folder name

Need to use sprintf to build a string instead of sscanf. Otherwise
dirname is null and both "ct_nic" and "ct_fdb" won't be created.
But its redundant anyway as driver could be in switchdev mode but
still add nic rules. So use "ct" as folder name.

Fixes: 77422a8f6f61 ("net/mlx5e: CT: Add ct driver counters")
Signed-off-by: Chris Mi <cmi@nvidia.com>
Reviewed-by: Roi Dayan <roid@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
22 months agonet/mlx5e: Fix RX reporter for XSK RQs
Tariq Toukan [Sun, 27 Nov 2022 07:21:28 +0000 (09:21 +0200)]
net/mlx5e: Fix RX reporter for XSK RQs

RX reporter mistakenly reads from the regular (inactive) RQ
when XSK RQ is active. Fix it here.

Fixes: 3db4c85cde7a ("net/mlx5e: xsk: Use queue indices starting from 0 for XSK queues")
Signed-off-by: Tariq Toukan <tariqt@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
22 months agonet/mlx5e: IPoIB, Don't allow CQE compression to be turned on by default
Dragos Tatulea [Mon, 28 Nov 2022 13:24:21 +0000 (15:24 +0200)]
net/mlx5e: IPoIB, Don't allow CQE compression to be turned on by default

mlx5e_build_nic_params will turn CQE compression on if the hardware
capability is enabled and the slow_pci_heuristic condition is detected.
As IPoIB doesn't support CQE compression, make sure to disable the
feature in the IPoIB profile init.

Please note that the feature is not exposed to the user for IPoIB
interfaces, so it can't be subsequently turned on.

Fixes: b797a684b0dd ("net/mlx5e: Enable CQE compression when PCI is slower than link")
Signed-off-by: Dragos Tatulea <dtatulea@nvidia.com>
Reviewed-by: Gal Pressman <gal@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
22 months agonet/mlx5: Fix RoCE setting at HCA level
Shay Drory [Wed, 9 Nov 2022 12:42:59 +0000 (14:42 +0200)]
net/mlx5: Fix RoCE setting at HCA level

mlx5 PF can disable RoCE for its VFs and SFs. In such case RoCE is
marked as unsupported on those VFs/SFs.
The cited patch added an option for disable (and enable) RoCE at HCA
level. However, that commit didn't check whether RoCE is supported on
the HCA and enabled user to try and set RoCE to on.
Fix it by checking whether the HCA supports RoCE.

Fixes: fbfa97b4d79f ("net/mlx5: Disable roce at HCA level")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
22 months agonet/mlx5: Avoid recovery in probe flows
Shay Drory [Thu, 24 Nov 2022 11:34:12 +0000 (13:34 +0200)]
net/mlx5: Avoid recovery in probe flows

Currently, recovery is done without considering whether the device is
still in probe flow.
This may lead to recovery before device have finished probed
successfully. e.g.: while mlx5_init_one() is running. Recovery flow is
using functionality that is loaded only by mlx5_init_one(), and there
is no point in running recovery without mlx5_init_one() finished
successfully.

Fix it by waiting for probe flow to finish and checking whether the
device is probed before trying to perform recovery.

Fixes: 51d138c2610a ("net/mlx5: Fix health error state handling")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
22 months agonet/mlx5: Fix io_eq_size and event_eq_size params validation
Shay Drory [Sun, 18 Dec 2022 10:42:14 +0000 (12:42 +0200)]
net/mlx5: Fix io_eq_size and event_eq_size params validation

io_eq_size and event_eq_size params are of param type
DEVLINK_PARAM_TYPE_U32. But, the validation callback is addressing them
as DEVLINK_PARAM_TYPE_U16.

This cause mismatch in validation in big-endian systems, in which
values in range were rejected while 268500991 was accepted.
Fix it by checking the U32 value in the validation callback.

Fixes: 0844fa5f7b89 ("net/mlx5: Let user configure io_eq_size param")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Reviewed-by: Moshe Shemesh <moshe@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
22 months agonet/mlx5: Add forgotten cleanup calls into mlx5_init_once() error path
Jiri Pirko [Tue, 18 Oct 2022 10:51:52 +0000 (12:51 +0200)]
net/mlx5: Add forgotten cleanup calls into mlx5_init_once() error path

There are two cleanup calls missing in mlx5_init_once() error path.
Add them making the error path flow to be the same as
mlx5_cleanup_once().

Fixes: 52ec462eca9b ("net/mlx5: Add reserved-gids support")
Fixes: 7c39afb394c7 ("net/mlx5: PTP code migration to driver core section")
Signed-off-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
22 months agonet/mlx5: E-Switch, properly handle ingress tagged packets on VST
Moshe Shemesh [Mon, 12 Dec 2022 08:42:15 +0000 (10:42 +0200)]
net/mlx5: E-Switch, properly handle ingress tagged packets on VST

Fix SRIOV VST mode behavior to insert cvlan when a guest tag is already
present in the frame. Previous VST mode behavior was to drop packets or
override existing tag, depending on the device version.

In this patch we fix this behavior by correctly building the HW steering
rule with a push vlan action, or for older devices we ask the FW to stack
the vlan when a vlan is already present.

Fixes: 07bab9502641 ("net/mlx5: E-Switch, Refactor eswitch ingress acl codes")
Fixes: dfcb1ed3c331 ("net/mlx5: E-Switch, Vport ingress/egress ACLs rules for VST mode")
Signed-off-by: Moshe Shemesh <moshe@nvidia.com>
Reviewed-by: Mark Bloch <mbloch@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
22 months agonet/sched: fix retpoline wrapper compilation on configs without tc filters
Pedro Tammela [Tue, 27 Dec 2022 14:04:59 +0000 (11:04 -0300)]
net/sched: fix retpoline wrapper compilation on configs without tc filters

Rudi reports a compilation failure on x86_64 when CONFIG_NET_CLS or
CONFIG_NET_CLS_ACT is not set but CONFIG_RETPOLINE is set.
A misplaced '#endif' was causing the issue.

Fixes: 7f0e810220e2 ("net/sched: add retpoline wrapper for tc")

Tested-by: Rudi Heitbaum <rudi@heitbaum.com>
Signed-off-by: Pedro Tammela <pctammela@mojatatu.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agos390/qeth: convert sysfs snprintf to sysfs_emit
Xuezhi Zhang [Tue, 27 Dec 2022 11:03:52 +0000 (19:03 +0800)]
s390/qeth: convert sysfs snprintf to sysfs_emit

Follow the advice of the Documentation/filesystems/sysfs.rst
and show() should only use sysfs_emit() or sysfs_emit_at()
when formatting the value to be returned to user space.

Signed-off-by: Xuezhi Zhang <zhangxuezhi1@coolpad.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoMerge branch 'r8169-fixes'
David S. Miller [Wed, 28 Dec 2022 11:58:08 +0000 (11:58 +0000)]
Merge branch 'r8169-fixes'

Chunhao Lin says:

====================
r8169: fix dmar pte write access is not set error

This series fixes dmar pte write access is not set error.

Chunhao Lin (2):
  r8169: move rtl_wol_enable_rx() and rtl_prepare_power_down()
  r8169: fix dmar pte write access is not set error

v2:
-update commit message
-adjust the code according to current kernel code
v3:
-update title and commit message
-split the patch
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agor8169: fix dmar pte write access is not set error
Chunhao Lin [Mon, 26 Dec 2022 12:31:53 +0000 (20:31 +0800)]
r8169: fix dmar pte write access is not set error

When close device, if wol is enabled, rx will be enabled. When open
device it will cause rx packet to be dma to the wrong memory address
after pci_set_master() and system log will show blow messages.

DMAR: DRHD: handling fault status reg 3
DMAR: [DMA Write] Request device [02:00.0] PASID ffffffff fault addr
ffdd4000 [fault reason 05] PTE Write access is not set

In this patch, driver disable tx/rx when close device. If wol is
enabled, only enable rx filter and disable rxdv_gate(if support) to
let hardware only receive packet to fifo but not to dma it.

Signed-off-by: Chunhao Lin <hau@realtek.com>
Reviewed-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agor8169: move rtl_wol_enable_rx() and rtl_prepare_power_down()
Chunhao Lin [Mon, 26 Dec 2022 12:31:52 +0000 (20:31 +0800)]
r8169: move rtl_wol_enable_rx() and rtl_prepare_power_down()

There is no functional change. Moving these two functions for following
patch "r8169: fix dmar pte write access is not set error".

Signed-off-by: Chunhao Lin <hau@realtek.com>
Reviewed-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoMerge branch 'ethtool_gert_phy_stats-fixes'
David S. Miller [Wed, 28 Dec 2022 11:55:24 +0000 (11:55 +0000)]
Merge branch 'ethtool_gert_phy_stats-fixes'

Daniil Tatianin says:

====================
net/ethtool/ioctl: split ethtool_get_phy_stats into multiple helpers

This series fixes a potential NULL dereference in ethtool_get_phy_stats
while also attempting to refactor/split said function into multiple
helpers so that it's easier to reason about what's going on.

I've taken Andrew Lunn's suggestions on the previous version of this
patch and added a bit of my own.

Changes since v1:
- Remove an extra newline in the first patch
- Move WARN_ON_ONCE into the if check as it already returns the
  result of the comparison
- Actually split ethtool_get_phy_stats instead of attempting to
  refactor it
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet/ethtool/ioctl: split ethtool_get_phy_stats into multiple helpers
Daniil Tatianin [Mon, 26 Dec 2022 11:48:25 +0000 (14:48 +0300)]
net/ethtool/ioctl: split ethtool_get_phy_stats into multiple helpers

So that it's easier to follow and make sense of the branching and
various conditions.

Stats retrieval has been split into two separate functions
ethtool_get_phy_stats_phydev & ethtool_get_phy_stats_ethtool.
The former attempts to retrieve the stats using phydev & phy_ops, while
the latter uses ethtool_ops.

Actual n_stats validation & array allocation has been moved into a new
ethtool_vzalloc_stats_array helper.

This also fixes a potential NULL dereference of
ops->get_ethtool_phy_stats where it was getting called in an else branch
unconditionally without making sure it was actually present.

Found by Linux Verification Center (linuxtesting.org) with the SVACE
static analysis tool.

Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet/ethtool/ioctl: remove if n_stats checks from ethtool_get_phy_stats
Daniil Tatianin [Mon, 26 Dec 2022 11:48:24 +0000 (14:48 +0300)]
net/ethtool/ioctl: remove if n_stats checks from ethtool_get_phy_stats

Now that we always early return if we don't have any stats we can remove
these checks as they're no longer necessary.

Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet/ethtool/ioctl: return -EOPNOTSUPP if we have no phy stats
Daniil Tatianin [Mon, 26 Dec 2022 11:48:23 +0000 (14:48 +0300)]
net/ethtool/ioctl: return -EOPNOTSUPP if we have no phy stats

It's not very useful to copy back an empty ethtool_stats struct and
return 0 if we didn't actually have any stats. This also allows for
further simplification of this function in the future commits.

Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoMerge branch 'bnxt_en-fixes'
David S. Miller [Wed, 28 Dec 2022 10:16:57 +0000 (10:16 +0000)]
Merge branch 'bnxt_en-fixes'

Michael Chan says:

====================
bnxt_en: Bug fixes

This series fixes a devlink bug and several XDP related bugs.  The
devlink bug causes a kernel crash on VF devices.  The XDP driver
patches fix and clean up the RX XDP path and re-enable header-data
split that was disabled by mistake when adding the XDP multi-buffer
support.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agobnxt_en: Fix HDS and jumbo thresholds for RX packets
Michael Chan [Tue, 27 Dec 2022 03:19:40 +0000 (22:19 -0500)]
bnxt_en: Fix HDS and jumbo thresholds for RX packets

The recent XDP multi-buffer feature has introduced regressions in the
setting of HDS and jumbo thresholds.  HDS was accidentally disabled in
the nornmal mode without XDP.  This patch restores jumbo HDS placement
when not in XDP mode.  In XDP multi-buffer mode, HDS should be disabled
and the jumbo threshold should be set to the usable page size in the
first page buffer.

Fixes: 32861236190b ("bnxt: change receive ring space parameters")
Reviewed-by: Mohammad Shuab Siddique <mohammad-shuab.siddique@broadcom.com>
Reviewed-by: Ajit Khaparde <ajit.khaparde@broadcom.com>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agobnxt_en: Fix first buffer size calculations for XDP multi-buffer
Michael Chan [Tue, 27 Dec 2022 03:19:39 +0000 (22:19 -0500)]
bnxt_en: Fix first buffer size calculations for XDP multi-buffer

The size of the first buffer is always page size, and the useable
space is the page size minus the offset and the skb_shared_info size.
Make sure SKB and XDP buf sizes match so that the skb_shared_info
is at the same offset seen from the SKB and XDP_BUF.

build_skb() should be passed PAGE_SIZE.  xdp_init_buff() should
be passed PAGE_SIZE as well.  xdp_get_shared_info_from_buff() will
automatically deduct the skb_shared_info size if the XDP buffer
has frags.  There is no need to keep bp->xdp_has_frags.

Change BNXT_PAGE_MODE_BUF_SIZE to BNXT_MAX_PAGE_MODE_MTU_SBUF
since this constant is really the MTU with ethernet header size
subtracted.

Also fix the BNXT_MAX_PAGE_MODE_MTU macro with proper parentheses.

Fixes: 32861236190b ("bnxt: change receive ring space parameters")
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agobnxt_en: Fix XDP RX path
Michael Chan [Tue, 27 Dec 2022 03:19:38 +0000 (22:19 -0500)]
bnxt_en: Fix XDP RX path

The XDP program can change the starting address of the RX data buffer and
this information needs to be passed back from bnxt_rx_xdp() to
bnxt_rx_pkt() for the XDP_PASS case so that the SKB can point correctly
to the modified buffer address.  Add back the data_ptr parameter to
bnxt_rx_xdp() to make this work.

Fixes: b231c3f3414c ("bnxt: refactor bnxt_rx_xdp to separate xdp_init_buff/xdp_prepare_buff")
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agobnxt_en: Simplify bnxt_xdp_buff_init()
Michael Chan [Tue, 27 Dec 2022 03:19:37 +0000 (22:19 -0500)]
bnxt_en: Simplify bnxt_xdp_buff_init()

bnxt_xdp_buff_init() does not modify the data_ptr or the len parameters,
so no need to pass in the addresses of these parameters.

Fixes: b231c3f3414c ("bnxt: refactor bnxt_rx_xdp to separate xdp_init_buff/xdp_prepare_buff")
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Reviewed-by: Somnath Kotur <somnath.kotur@broadcom.com>
Reviewed-by: Pavan Chebbi <pavan.chebbi@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agobnxt_en: fix devlink port registration to netdev
Vikas Gupta [Tue, 27 Dec 2022 03:19:36 +0000 (22:19 -0500)]
bnxt_en: fix devlink port registration to netdev

We don't register a devlink port in case of a VF so
avoid setting the devlink pointer to netdev.
Also, SET_NETDEV_DEVLINK_PORT has to be moved
so that we determine whether the device is PF/VF first.

This fixes the NULL pointer dereference of devlink_port->devlink
when creating VFs:

BUG: kernel NULL pointer dereference, address: 0000000000000160
PGD 0
Oops: 0000 [#1] PREEMPT SMP NOPTI
CPU: 14 PID: 388 Comm: kworker/14:1 Kdump: loaded Not tainted 6.1.0-rc8 #5
Hardware name: Dell Inc. PowerEdge R750/06V45N, BIOS 1.3.8 08/31/2021
Workqueue: events work_for_cpu_fn
RIP: 0010:devlink_nl_port_handle_size+0xb/0x50
Code: 83 c4 10 5b 5d c3 cc cc cc cc b8 a6 ff ff ff eb de e8 c9 59 21 00 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 55 53 48 8b 47 20 <48> 8b a8 60 01 00 00 48 8b 45 60 48 8b 38 e8 92 90 1a 00 48 8b 7d
RSP: 0018:ff4fe5394846fcd8 EFLAGS: 00010286
RAX: 0000000000000000 RBX: 0000000000000794 RCX: 0000000000000000
RDX: ff1f129683a30a40 RSI: 0000000000000008 RDI: ff1f1296bb496188
RBP: 0000000000000334 R08: 0000000000000cc0 R09: 0000000000000000
R10: ff1f1296bb494298 R11: ffffffffffffffc0 R12: 0000000000000000
R13: 0000000000000000 R14: ff1f1296bb494000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ff1f129e5fa00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000160 CR3: 000000131f610006 CR4: 0000000000771ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
PKRU: 55555554
Call Trace:
 <TASK>
 if_nlmsg_size+0x14a/0x220
 rtmsg_ifinfo_build_skb+0x3c/0x100
 rtmsg_ifinfo+0x9c/0xc0
 register_netdevice+0x59d/0x670
 register_netdev+0x1c/0x40
 bnxt_init_one+0x674/0xa60 [bnxt_en]
 local_pci_probe+0x42/0x80
 work_for_cpu_fn+0x13/0x20
 process_one_work+0x1e2/0x3b0
 ? rescuer_thread+0x390/0x390
 worker_thread+0x1c4/0x3a0
 ? rescuer_thread+0x390/0x390
 kthread+0xd6/0x100
 ? kthread_complete_and_exit+0x20/0x20

Fixes: ac73d4bf2cda ("net: make drivers to use SET_NETDEV_DEVLINK_PORT to set devlink_port")
Cc: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Vikas Gupta <vikas.gupta@broadcom.com>
Reviewed-by: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Reviewed-by: Kalesh Anakkur Purayil <kalesh-anakkur.purayil@broadcom.com>
Reviewed-by: Damodharam Ammepalli <damodharam.ammepalli@broadcom.com>
Signed-off-by: Michael Chan <michael.chan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoMerge branch 'rswitch-fixes'
David S. Miller [Wed, 28 Dec 2022 10:09:50 +0000 (10:09 +0000)]
Merge branch 'rswitch-fixes'

Yoshihiro Shimoda says:

====================
net: ethernet: renesas: rswitch: Fix minor issues

This patch series is based on v6.2-rc2.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ethernet: renesas: rswitch: Fix getting mac address from device tree
Yoshihiro Shimoda [Mon, 26 Dec 2022 07:13:28 +0000 (16:13 +0900)]
net: ethernet: renesas: rswitch: Fix getting mac address from device tree

To get mac address from device tree which is from each ethernet-port,
fix the first argument of of_get_ethdev_address().

Fixes: 3590918b5d07 ("net: ethernet: renesas: Add support for "Ethernet Switch"")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ethernet: renesas: rswitch: Fix error path in renesas_eth_sw_probe()
Yoshihiro Shimoda [Mon, 26 Dec 2022 07:13:27 +0000 (16:13 +0900)]
net: ethernet: renesas: rswitch: Fix error path in renesas_eth_sw_probe()

If rswitch_init() returns non-zero and this driver is re-probed,
the following error happens:

    renesas_eth_sw e6880000.ethernet: Unbalanced pm_runtime_enable!

So, fix error path in renesas_eth_sw_probe().

Fixes: 3590918b5d07 ("net: ethernet: renesas: Add support for "Ethernet Switch"")
Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoMerge branch 'netdev-doc-defaq'
David S. Miller [Wed, 28 Dec 2022 10:06:06 +0000 (10:06 +0000)]
Merge branch 'netdev-doc-defaq'

Jakub Kicinski says:

====================
netdev doc de-FAQization

We have outgrown the FAQ format for our process doc.
I often find myself struggling to locate information in this doc,
because the questions do not serve well as section headers.
Reformat the document.

v2: update the headers
v1: https://lore.kernel.org/all/20221221184007.1170384-1-kuba@kernel.org/
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agodocs: netdev: convert to a non-FAQ document
Jakub Kicinski [Thu, 22 Dec 2022 19:22:48 +0000 (11:22 -0800)]
docs: netdev: convert to a non-FAQ document

The netdev-FAQ document has grown over the years to the point
where finding information in it is somewhat challenging.
The length of the questions prevents readers from locating
content that's relevant at a glance.

Convert to a more standard documentation format with sections
and sub-sections rather than questions and answers.

The content edits are limited to what's necessary to change
the format, and very minor clarifications.

Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agodocs: netdev: reshuffle sections in prep for de-FAQization
Jakub Kicinski [Thu, 22 Dec 2022 19:22:47 +0000 (11:22 -0800)]
docs: netdev: reshuffle sections in prep for de-FAQization

Subsequent changes will reformat the doc away from FAQ.
To make that more readable perform the pure section moves now.

Reviewed-by: Randy Dunlap <rdunlap@infradead.org>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agorxrpc: Fix a couple of potential use-after-frees
David Howells [Sat, 24 Dec 2022 14:49:00 +0000 (14:49 +0000)]
rxrpc: Fix a couple of potential use-after-frees

At the end of rxrpc_recvmsg(), if a call is found, the call is put and then
a trace line is emitted referencing that call in a couple of places - but
the call may have been deallocated by the time those traces happen.

Fix this by stashing the call debug_id in a variable and passing that to
the tracepoint rather than the call pointer.

Fixes: 849979051cbc ("rxrpc: Add a tracepoint to follow what recvmsg does")
Signed-off-by: David Howells <dhowells@redhat.com>
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: ethernet: marvell: octeontx2: Fix uninitialized variable warning
Anuradha Weeraman [Sun, 25 Dec 2022 17:42:22 +0000 (23:12 +0530)]
net: ethernet: marvell: octeontx2: Fix uninitialized variable warning

Fix for uninitialized variable warning.

Addresses-Coverity: ("Uninitialized scalar variable")
Signed-off-by: Anuradha Weeraman <anuradha@debian.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonfc: Fix potential resource leaks
Miaoqian Lin [Fri, 23 Dec 2022 07:37:18 +0000 (11:37 +0400)]
nfc: Fix potential resource leaks

nfc_get_device() take reference for the device, add missing
nfc_put_device() to release it when not need anymore.
Also fix the style warnning by use error EOPNOTSUPP instead of
ENOTSUPP.

Fixes: 5ce3f32b5264 ("NFC: netlink: SE API implementation")
Fixes: 29e76924cf08 ("nfc: netlink: Add capability to reply to vendor_cmd with data")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: dsa: mv88e6xxx: depend on PTP conditionally
Johnny S. Lee [Thu, 22 Dec 2022 14:34:05 +0000 (22:34 +0800)]
net: dsa: mv88e6xxx: depend on PTP conditionally

PTP hardware timestamping related objects are not linked when PTP
support for MV88E6xxx (NET_DSA_MV88E6XXX_PTP) is disabled, therefore
NET_DSA_MV88E6XXX should not depend on PTP_1588_CLOCK_OPTIONAL
regardless of NET_DSA_MV88E6XXX_PTP.

Instead, condition more strictly on how NET_DSA_MV88E6XXX_PTP's
dependencies are met, making sure that it cannot be enabled when
NET_DSA_MV88E6XXX=y and PTP_1588_CLOCK=m.

In other words, this commit allows NET_DSA_MV88E6XXX to be built-in
while PTP_1588_CLOCK is a module, as long as NET_DSA_MV88E6XXX_PTP is
prevented from being enabled.

Fixes: e5f31552674e ("ethernet: fix PTP_1588_CLOCK dependencies")
Signed-off-by: Johnny S. Lee <foss@jsl.io>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoqlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure
Daniil Tatianin [Thu, 22 Dec 2022 11:52:28 +0000 (14:52 +0300)]
qlcnic: prevent ->dcb use-after-free on qlcnic_dcb_enable() failure

adapter->dcb would get silently freed inside qlcnic_dcb_enable() in
case qlcnic_dcb_attach() would return an error, which always happens
under OOM conditions. This would lead to use-after-free because both
of the existing callers invoke qlcnic_dcb_get_info() on the obtained
pointer, which is potentially freed at that point.

Propagate errors from qlcnic_dcb_enable(), and instead free the dcb
pointer at callsite using qlcnic_dcb_free(). This also removes the now
unused qlcnic_clear_dcb_ops() helper, which was a simple wrapper around
kfree() also causing memory leaks for partially initialized dcb.

Found by Linux Verification Center (linuxtesting.org) with the SVACE
static analysis tool.

Fixes: 3c44bba1d270 ("qlcnic: Disable DCB operations from SR-IOV VFs")
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Signed-off-by: Daniil Tatianin <d-tatianin@yandex-team.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agonet: sched: fix memory leak in tcindex_set_parms
Hawkins Jiawei [Thu, 22 Dec 2022 03:51:19 +0000 (11:51 +0800)]
net: sched: fix memory leak in tcindex_set_parms

Syzkaller reports a memory leak as follows:
====================================
BUG: memory leak
unreferenced object 0xffff88810c287f00 (size 256):
  comm "syz-executor105", pid 3600, jiffies 4294943292 (age 12.990s)
  hex dump (first 32 bytes):
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
    00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00  ................
  backtrace:
    [<ffffffff814cf9f0>] kmalloc_trace+0x20/0x90 mm/slab_common.c:1046
    [<ffffffff839c9e07>] kmalloc include/linux/slab.h:576 [inline]
    [<ffffffff839c9e07>] kmalloc_array include/linux/slab.h:627 [inline]
    [<ffffffff839c9e07>] kcalloc include/linux/slab.h:659 [inline]
    [<ffffffff839c9e07>] tcf_exts_init include/net/pkt_cls.h:250 [inline]
    [<ffffffff839c9e07>] tcindex_set_parms+0xa7/0xbe0 net/sched/cls_tcindex.c:342
    [<ffffffff839caa1f>] tcindex_change+0xdf/0x120 net/sched/cls_tcindex.c:553
    [<ffffffff8394db62>] tc_new_tfilter+0x4f2/0x1100 net/sched/cls_api.c:2147
    [<ffffffff8389e91c>] rtnetlink_rcv_msg+0x4dc/0x5d0 net/core/rtnetlink.c:6082
    [<ffffffff839eba67>] netlink_rcv_skb+0x87/0x1d0 net/netlink/af_netlink.c:2540
    [<ffffffff839eab87>] netlink_unicast_kernel net/netlink/af_netlink.c:1319 [inline]
    [<ffffffff839eab87>] netlink_unicast+0x397/0x4c0 net/netlink/af_netlink.c:1345
    [<ffffffff839eb046>] netlink_sendmsg+0x396/0x710 net/netlink/af_netlink.c:1921
    [<ffffffff8383e796>] sock_sendmsg_nosec net/socket.c:714 [inline]
    [<ffffffff8383e796>] sock_sendmsg+0x56/0x80 net/socket.c:734
    [<ffffffff8383eb08>] ____sys_sendmsg+0x178/0x410 net/socket.c:2482
    [<ffffffff83843678>] ___sys_sendmsg+0xa8/0x110 net/socket.c:2536
    [<ffffffff838439c5>] __sys_sendmmsg+0x105/0x330 net/socket.c:2622
    [<ffffffff83843c14>] __do_sys_sendmmsg net/socket.c:2651 [inline]
    [<ffffffff83843c14>] __se_sys_sendmmsg net/socket.c:2648 [inline]
    [<ffffffff83843c14>] __x64_sys_sendmmsg+0x24/0x30 net/socket.c:2648
    [<ffffffff84605fd5>] do_syscall_x64 arch/x86/entry/common.c:50 [inline]
    [<ffffffff84605fd5>] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
    [<ffffffff84800087>] entry_SYSCALL_64_after_hwframe+0x63/0xcd
====================================

Kernel uses tcindex_change() to change an existing
filter properties.

Yet the problem is that, during the process of changing,
if `old_r` is retrieved from `p->perfect`, then
kernel uses tcindex_alloc_perfect_hash() to newly
allocate filter results, uses tcindex_filter_result_init()
to clear the old filter result, without destroying
its tcf_exts structure, which triggers the above memory leak.

To be more specific, there are only two source for the `old_r`,
according to the tcindex_lookup(). `old_r` is retrieved from
`p->perfect`, or `old_r` is retrieved from `p->h`.

  * If `old_r` is retrieved from `p->perfect`, kernel uses
tcindex_alloc_perfect_hash() to newly allocate the
filter results. Then `r` is assigned with `cp->perfect + handle`,
which is newly allocated. So condition `old_r && old_r != r` is
true in this situation, and kernel uses tcindex_filter_result_init()
to clear the old filter result, without destroying
its tcf_exts structure

  * If `old_r` is retrieved from `p->h`, then `p->perfect` is NULL
according to the tcindex_lookup(). Considering that `cp->h`
is directly copied from `p->h` and `p->perfect` is NULL,
`r` is assigned with `tcindex_lookup(cp, handle)`, whose value
should be the same as `old_r`, so condition `old_r && old_r != r`
is false in this situation, kernel ignores using
tcindex_filter_result_init() to clear the old filter result.

So only when `old_r` is retrieved from `p->perfect` does kernel use
tcindex_filter_result_init() to clear the old filter result, which
triggers the above memory leak.

Considering that there already exists a tc_filter_wq workqueue
to destroy the old tcindex_data by tcindex_partial_destroy_work()
at the end of tcindex_set_parms(), this patch solves
this memory leak bug by removing this old filter result
clearing part and delegating it to the tc_filter_wq workqueue.

Note that this patch doesn't introduce any other issues. If
`old_r` is retrieved from `p->perfect`, this patch just
delegates old filter result clearing part to the
tc_filter_wq workqueue; If `old_r` is retrieved from `p->h`,
kernel doesn't reach the old filter result clearing part, so
removing this part has no effect.

[Thanks to the suggestion from Jakub Kicinski, Cong Wang, Paolo Abeni
and Dmitry Vyukov]

Fixes: b9a24bb76bf6 ("net_sched: properly handle failure case of tcf_exts_init()")
Link: https://lore.kernel.org/all/0000000000001de5c505ebc9ec59@google.com/
Reported-by: syzbot+232ebdbd36706c965ebf@syzkaller.appspotmail.com
Tested-by: syzbot+232ebdbd36706c965ebf@syzkaller.appspotmail.com
Cc: Cong Wang <cong.wang@bytedance.com>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Paolo Abeni <pabeni@redhat.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Acked-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Hawkins Jiawei <yin31149@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoMerge tag 'for-netdev' of git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
David S. Miller [Sat, 24 Dec 2022 09:39:02 +0000 (09:39 +0000)]
Merge tag 'for-netdev' of git://git./linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
The following pull-request contains BPF updates for your *net* tree.

We've added 7 non-merge commits during the last 5 day(s) which contain
a total of 11 files changed, 231 insertions(+), 3 deletions(-).

The main changes are:

1) Fix a splat in bpf_skb_generic_pop() under CHECKSUM_PARTIAL due to
   misuse of skb_postpull_rcsum(), from Jakub Kicinski with test case
   from Martin Lau.

2) Fix BPF verifier's nullness propagation when registers are of
   type PTR_TO_BTF_ID, from Hao Sun.

3) Fix bpftool build for JIT disassembler under statically built
   libllvm, from Anton Protopopov.

4) Fix warnings reported by resolve_btfids when building vmlinux
   with CONFIG_SECURITY_NETWORK disabled, from Hou Tao.

5) Minor fix up for BPF selftest gitignore, from Stanislav Fomichev.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
22 months agoselftests/bpf: Add host-tools to gitignore
Stanislav Fomichev [Thu, 22 Dec 2022 21:39:58 +0000 (13:39 -0800)]
selftests/bpf: Add host-tools to gitignore

Shows up when cross-compiling:

HOST_SCRATCH_DIR        := $(OUTPUT)/host-tools

vs

SCRATCH_DIR := $(OUTPUT)/tools
HOST_SCRATCH_DIR        := $(SCRATCH_DIR)

Reported-by: John Sperbeck <jsperbeck@google.com>
Signed-off-by: Stanislav Fomichev <sdf@google.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20221222213958.2302320-1-sdf@google.com
22 months agoMerge branch 'net-hns3-fix-some-bug-for-hns3'
Jakub Kicinski [Fri, 23 Dec 2022 20:00:09 +0000 (12:00 -0800)]
Merge branch 'net-hns3-fix-some-bug-for-hns3'

Hao Lan says:

====================
net: hns3: fix some bug for hns3

There are some bugfixes for the HNS3 ethernet driver. patch#1 fix miss
checking for rx packet. patch#2 fixes VF promisc mode not update
when mac table full bug, and patch#3 fixes a nterrupts not
initialization in VF FLR bug.
====================

Link: https://lore.kernel.org/r/20221222064343.61537-1-lanhao@huawei.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agonet: hns3: fix VF promisc mode not update when mac table full
Jian Shen [Thu, 22 Dec 2022 06:43:43 +0000 (14:43 +0800)]
net: hns3: fix VF promisc mode not update when mac table full

Currently, it missed set HCLGE_VPORT_STATE_PROMISC_CHANGE
flag for VF when vport->overflow_promisc_flags changed.
So the VF won't check whether to update promisc mode in
this case. So add it.

Fixes: 1e6e76101fd9 ("net: hns3: configure promisc mode for VF asynchronously")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Hao Lan <lanhao@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agonet: hns3: fix miss L3E checking for rx packet
Jian Shen [Thu, 22 Dec 2022 06:43:42 +0000 (14:43 +0800)]
net: hns3: fix miss L3E checking for rx packet

For device supports RXD advanced layout, the driver will
return directly if the hardware finish the checksum
calculate. It cause missing L3E checking for ip packets.
Fixes it.

Fixes: 1ddc028ac849 ("net: hns3: refactor out RX completion checksum")
Signed-off-by: Jian Shen <shenjian15@huawei.com>
Signed-off-by: Hao Lan <lanhao@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agonet: hns3: add interrupts re-initialization while doing VF FLR
Jie Wang [Thu, 22 Dec 2022 06:43:41 +0000 (14:43 +0800)]
net: hns3: add interrupts re-initialization while doing VF FLR

Currently keep alive message between PF and VF may be lost and the VF is
unalive in PF. So the VF will not do reset during PF FLR reset process.
This would make the allocated interrupt resources of VF invalid and VF
would't receive or respond to PF any more.

So this patch adds VF interrupts re-initialization during VF FLR for VF
recovery in above cases.

Fixes: 862d969a3a4d ("net: hns3: do VF's pci re-initialization while PF doing FLR")
Signed-off-by: Jie Wang <wangjie125@huawei.com>
Signed-off-by: Hao Lan <lanhao@huawei.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agoatm: uapi: fix spelling typos in comments
Rong Tao [Wed, 21 Dec 2022 12:36:27 +0000 (20:36 +0800)]
atm: uapi: fix spelling typos in comments

Fix the typo of 'Unsuported' in atmbr2684.h

Signed-off-by: Rong Tao <rongtao@cestc.cn>
Link: https://lore.kernel.org/r/tencent_F1354BEC925C65EA357E741E91DF2044E805@qq.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agopowerpc: dts: t208x: Disable 10G on MAC1 and MAC2
Sean Anderson [Fri, 16 Dec 2022 17:29:37 +0000 (12:29 -0500)]
powerpc: dts: t208x: Disable 10G on MAC1 and MAC2

There aren't enough resources to run these ports at 10G speeds. Disable
10G for these ports, reverting to the previous speed.

Fixes: 36926a7d70c2 ("powerpc: dts: t208x: Mark MAC1 and MAC2 as 10G")
Reported-by: Camelia Alexandra Groza <camelia.groza@nxp.com>
Signed-off-by: Sean Anderson <sean.anderson@seco.com>
Reviewed-by: Camelia Groza <camelia.groza@nxp.com>
Tested-by: Camelia Groza <camelia.groza@nxp.com>
Link: https://lore.kernel.org/r/20221216172937.2960054-1-sean.anderson@seco.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agoselftests/bpf: check null propagation only neither reg is PTR_TO_BTF_ID
Hao Sun [Thu, 22 Dec 2022 02:44:14 +0000 (10:44 +0800)]
selftests/bpf: check null propagation only neither reg is PTR_TO_BTF_ID

Verify that nullness information is not porpagated in the branches
of register to register JEQ and JNE operations if one of them is
PTR_TO_BTF_ID. Implement this in C level so we can use CO-RE.

Signed-off-by: Hao Sun <sunhao.th@gmail.com>
Suggested-by: Martin KaFai Lau <martin.lau@kernel.org>
Link: https://lore.kernel.org/r/20221222024414.29539-2-sunhao.th@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
22 months agobpf: fix nullness propagation for reg to reg comparisons
Hao Sun [Thu, 22 Dec 2022 02:44:13 +0000 (10:44 +0800)]
bpf: fix nullness propagation for reg to reg comparisons

After befae75856ab, the verifier would propagate null information after
JEQ/JNE, e.g., if two pointers, one is maybe_null and the other is not,
the former would be marked as non-null in eq path. However, as comment
"PTR_TO_BTF_ID points to a kernel struct that does not need to be null
checked by the BPF program ... The verifier must keep this in mind and
can make no assumptions about null or non-null when doing branch ...".
If one pointer is maybe_null and the other is PTR_TO_BTF, the former is
incorrectly marked non-null. The following BPF prog can trigger a
null-ptr-deref, also see this report for more details[1]:

0: (18) r1 = map_fd         ; R1_w=map_ptr(ks=4, vs=4)
2: (79) r6 = *(u64 *)(r1 +8)    ; R6_w=bpf_map->inner_map_data
; R6 is PTR_TO_BTF_ID
; equals to null at runtime
3: (bf) r2 = r10
4: (07) r2 += -4
5: (62) *(u32 *)(r2 +0) = 0
6: (85) call bpf_map_lookup_elem#1    ; R0_w=map_value_or_null
7: (1d) if r6 == r0 goto pc+1
8: (95) exit
; from 7 to 9: R0=map_value R6=ptr_bpf_map
9: (61) r0 = *(u32 *)(r0 +0)          ; null-ptr-deref
10: (95) exit

So, make the verifier propagate nullness information for reg to reg
comparisons only if neither reg is PTR_TO_BTF_ID.

[1] https://lore.kernel.org/bpf/CACkBjsaFJwjC5oiw-1KXvcazywodwXo4zGYsRHwbr2gSG9WcSw@mail.gmail.com/T/#u

Fixes: befae75856ab ("bpf: propagate nullness information for reg to reg comparisons")
Signed-off-by: Hao Sun <sunhao.th@gmail.com>
Acked-by: Yonghong Song <yhs@fb.com>
Link: https://lore.kernel.org/r/20221222024414.29539-1-sunhao.th@gmail.com
Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
22 months agobpftool: Fix linkage with statically built libllvm
Anton Protopopov [Thu, 22 Dec 2022 10:26:27 +0000 (10:26 +0000)]
bpftool: Fix linkage with statically built libllvm

Since the commit eb9d1acf634b ("bpftool: Add LLVM as default library for
disassembling JIT-ed programs") we might link the bpftool program with the
libllvm library. This works fine when a shared libllvm library is available,
but fails if we want to link bpftool with a statically built LLVM:

  [...]
  /usr/bin/ld: /usr/local/lib/libLLVMSupport.a(CrashRecoveryContext.cpp.o): in function `llvm::CrashRecoveryContextCleanup::~CrashRecoveryContextCleanup()':
  CrashRecoveryContext.cpp:(.text._ZN4llvm27CrashRecoveryContextCleanupD0Ev+0x17): undefined reference to `operator delete(void*, unsigned long)'
  /usr/bin/ld: /usr/local/lib/libLLVMSupport.a(CrashRecoveryContext.cpp.o): in function `llvm::CrashRecoveryContext::~CrashRecoveryContext()':
  CrashRecoveryContext.cpp:(.text._ZN4llvm20CrashRecoveryContextD2Ev+0xc8): undefined reference to `operator delete(void*, unsigned long)'
  [...]

So in the case of static libllvm we need to explicitly link bpftool with
required libraries, namely, libstdc++ and those provided by the `llvm-config
--system-libs` command. We can distinguish between the shared and static cases
by using the `llvm-config --shared-mode` command.

Fixes: eb9d1acf634b ("bpftool: Add LLVM as default library for disassembling JIT-ed programs")
Signed-off-by: Anton Protopopov <aspsk@isovalent.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/20221222102627.1643709-1-aspsk@isovalent.com
22 months agoveth: Fix race with AF_XDP exposing old or uninitialized descriptors
Shawn Bohrer [Tue, 20 Dec 2022 18:59:03 +0000 (12:59 -0600)]
veth: Fix race with AF_XDP exposing old or uninitialized descriptors

When AF_XDP is used on on a veth interface the RX ring is updated in two
steps.  veth_xdp_rcv() removes packet descriptors from the FILL ring
fills them and places them in the RX ring updating the cached_prod
pointer.  Later xdp_do_flush() syncs the RX ring prod pointer with the
cached_prod pointer allowing user-space to see the recently filled in
descriptors.  The rings are intended to be SPSC, however the existing
order in veth_poll allows the xdp_do_flush() to run concurrently with
another CPU creating a race condition that allows user-space to see old
or uninitialized descriptors in the RX ring.  This bug has been observed
in production systems.

To summarize, we are expecting this ordering:

CPU 0 __xsk_rcv_zc()
CPU 0 __xsk_map_flush()
CPU 2 __xsk_rcv_zc()
CPU 2 __xsk_map_flush()

But we are seeing this order:

CPU 0 __xsk_rcv_zc()
CPU 2 __xsk_rcv_zc()
CPU 0 __xsk_map_flush()
CPU 2 __xsk_map_flush()

This occurs because we rely on NAPI to ensure that only one napi_poll
handler is running at a time for the given veth receive queue.
napi_schedule_prep() will prevent multiple instances from getting
scheduled. However calling napi_complete_done() signals that this
napi_poll is complete and allows subsequent calls to
napi_schedule_prep() and __napi_schedule() to succeed in scheduling a
concurrent napi_poll before the xdp_do_flush() has been called.  For the
veth driver a concurrent call to napi_schedule_prep() and
__napi_schedule() can occur on a different CPU because the veth xmit
path can additionally schedule a napi_poll creating the race.

The fix as suggested by Magnus Karlsson, is to simply move the
xdp_do_flush() call before napi_complete_done().  This syncs the
producer ring pointers before another instance of napi_poll can be
scheduled on another CPU.  It will also slightly improve performance by
moving the flush closer to when the descriptors were placed in the
RX ring.

Fixes: d1396004dd86 ("veth: Add XDP TX and REDIRECT")
Suggested-by: Magnus Karlsson <magnus.karlsson@gmail.com>
Signed-off-by: Shawn Bohrer <sbohrer@cloudflare.com>
Link: https://lore.kernel.org/r/20221220185903.1105011-1-sbohrer@cloudflare.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
22 months agonet: lan966x: Fix configuration of the PCS
Horatiu Vultur [Wed, 21 Dec 2022 09:33:15 +0000 (10:33 +0100)]
net: lan966x: Fix configuration of the PCS

When the PCS was taken out of reset, we were changing by mistake also
the speed to 100 Mbit. But in case the link was going down, the link
up routine was setting correctly the link speed. If the link was not
getting down then the speed was forced to run at 100 even if the
speed was something else.
On lan966x, to set the speed link to 1G or 2.5G a value of 1 needs to be
written in DEV_CLOCK_CFG_LINK_SPEED. This is similar to the procedure in
lan966x_port_init.

The issue was reproduced using 1000base-x sfp module using the commands:
ip link set dev eth2 up
ip link addr add 10.97.10.2/24 dev eth2
ethtool -s eth2 speed 1000 autoneg off

Fixes: d28d6d2e37d1 ("net: lan966x: add port module support")
Signed-off-by: Horatiu Vultur <horatiu.vultur@microchip.com>
Reviewed-by: Piotr Raczynski <piotr.raczynski@intel.com>
Link: https://lore.kernel.org/r/20221221093315.939133-1-horatiu.vultur@microchip.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
22 months agobonding: fix lockdep splat in bond_miimon_commit()
Eric Dumazet [Tue, 20 Dec 2022 13:08:31 +0000 (13:08 +0000)]
bonding: fix lockdep splat in bond_miimon_commit()

bond_miimon_commit() is run while RTNL is held, not RCU.

WARNING: suspicious RCU usage
6.1.0-syzkaller-09671-g89529367293c #0 Not tainted
-----------------------------
drivers/net/bonding/bond_main.c:2704 suspicious rcu_dereference_check() usage!

Fixes: e95cc44763a4 ("bonding: do failover when high prio link up")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Hangbin Liu <liuhangbin@gmail.com>
Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Link: https://lore.kernel.org/r/20221220130831.1480888-1-edumazet@google.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
22 months agoMerge branch 'mptcp-locking-fixes'
Jakub Kicinski [Thu, 22 Dec 2022 02:06:01 +0000 (18:06 -0800)]
Merge branch 'mptcp-locking-fixes'

Mat Martineau says:

====================
mptcp: Locking fixes

Two separate locking fixes for the networking tree:

Patch 1 addresses a MPTCP fastopen error-path deadlock that was found
with syzkaller.

Patch 2 works around a lockdep false-positive between MPTCP listening and
non-listening sockets at socket destruct time.
====================

Link: https://lore.kernel.org/r/20221220195215.238353-1-mathew.j.martineau@linux.intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agomptcp: fix lockdep false positive
Paolo Abeni [Tue, 20 Dec 2022 19:52:15 +0000 (11:52 -0800)]
mptcp: fix lockdep false positive

MattB reported a lockdep splat in the mptcp listener code cleanup:

 WARNING: possible circular locking dependency detected
 packetdrill/14278 is trying to acquire lock:
 ffff888017d868f0 ((work_completion)(&msk->work)){+.+.}-{0:0}, at: __flush_work (kernel/workqueue.c:3069)

 but task is already holding lock:
 ffff888017d84130 (sk_lock-AF_INET){+.+.}-{0:0}, at: mptcp_close (net/mptcp/protocol.c:2973)

 which lock already depends on the new lock.

 the existing dependency chain (in reverse order) is:

 -> #1 (sk_lock-AF_INET){+.+.}-{0:0}:
        __lock_acquire (kernel/locking/lockdep.c:5055)
        lock_acquire (kernel/locking/lockdep.c:466)
        lock_sock_nested (net/core/sock.c:3463)
        mptcp_worker (net/mptcp/protocol.c:2614)
        process_one_work (kernel/workqueue.c:2294)
        worker_thread (include/linux/list.h:292)
        kthread (kernel/kthread.c:376)
        ret_from_fork (arch/x86/entry/entry_64.S:312)

 -> #0 ((work_completion)(&msk->work)){+.+.}-{0:0}:
        check_prev_add (kernel/locking/lockdep.c:3098)
        validate_chain (kernel/locking/lockdep.c:3217)
        __lock_acquire (kernel/locking/lockdep.c:5055)
        lock_acquire (kernel/locking/lockdep.c:466)
        __flush_work (kernel/workqueue.c:3070)
        __cancel_work_timer (kernel/workqueue.c:3160)
        mptcp_cancel_work (net/mptcp/protocol.c:2758)
        mptcp_subflow_queue_clean (net/mptcp/subflow.c:1817)
        __mptcp_close_ssk (net/mptcp/protocol.c:2363)
        mptcp_destroy_common (net/mptcp/protocol.c:3170)
        mptcp_destroy (include/net/sock.h:1495)
        __mptcp_destroy_sock (net/mptcp/protocol.c:2886)
        __mptcp_close (net/mptcp/protocol.c:2959)
        mptcp_close (net/mptcp/protocol.c:2974)
        inet_release (net/ipv4/af_inet.c:432)
        __sock_release (net/socket.c:651)
        sock_close (net/socket.c:1367)
        __fput (fs/file_table.c:320)
        task_work_run (kernel/task_work.c:181 (discriminator 1))
        exit_to_user_mode_prepare (include/linux/resume_user_mode.h:49)
        syscall_exit_to_user_mode (kernel/entry/common.c:130)
        do_syscall_64 (arch/x86/entry/common.c:87)
        entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:120)

 other info that might help us debug this:

  Possible unsafe locking scenario:

        CPU0                    CPU1
        ----                    ----
   lock(sk_lock-AF_INET);
                                lock((work_completion)(&msk->work));
                                lock(sk_lock-AF_INET);
   lock((work_completion)(&msk->work));

  *** DEADLOCK ***

The report is actually a false positive, since the only existing lock
nesting is the msk socket lock acquired by the mptcp work.
cancel_work_sync() is invoked without the relevant socket lock being
held, but under a different (the msk listener) socket lock.

We could silence the splat adding a per workqueue dynamic lockdep key,
but that looks overkill. Instead just tell lockdep the msk socket lock
is not held around cancel_work_sync().

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/322
Fixes: 30e51b923e43 ("mptcp: fix unreleased socket in accept queue")
Reported-by: Matthieu Baerts <matthieu.baerts@tessares.net>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agomptcp: fix deadlock in fastopen error path
Paolo Abeni [Tue, 20 Dec 2022 19:52:14 +0000 (11:52 -0800)]
mptcp: fix deadlock in fastopen error path

MatM reported a deadlock at fastopening time:

INFO: task syz-executor.0:11454 blocked for more than 143 seconds.
      Tainted: G S                 6.1.0-rc5-03226-gdb0157db5153 #1
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:25104 pid:11454 ppid:424    flags:0x00004006
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5191 [inline]
 __schedule+0x5c2/0x1550 kernel/sched/core.c:6503
 schedule+0xe8/0x1c0 kernel/sched/core.c:6579
 __lock_sock+0x142/0x260 net/core/sock.c:2896
 lock_sock_nested+0xdb/0x100 net/core/sock.c:3466
 __mptcp_close_ssk+0x1a3/0x790 net/mptcp/protocol.c:2328
 mptcp_destroy_common+0x16a/0x650 net/mptcp/protocol.c:3171
 mptcp_disconnect+0xb8/0x450 net/mptcp/protocol.c:3019
 __inet_stream_connect+0x897/0xa40 net/ipv4/af_inet.c:720
 tcp_sendmsg_fastopen+0x3dd/0x740 net/ipv4/tcp.c:1200
 mptcp_sendmsg_fastopen net/mptcp/protocol.c:1682 [inline]
 mptcp_sendmsg+0x128a/0x1a50 net/mptcp/protocol.c:1721
 inet6_sendmsg+0x11f/0x150 net/ipv6/af_inet6.c:663
 sock_sendmsg_nosec net/socket.c:714 [inline]
 sock_sendmsg+0xf7/0x190 net/socket.c:734
 ____sys_sendmsg+0x336/0x970 net/socket.c:2476
 ___sys_sendmsg+0x122/0x1c0 net/socket.c:2530
 __sys_sendmmsg+0x18d/0x460 net/socket.c:2616
 __do_sys_sendmmsg net/socket.c:2645 [inline]
 __se_sys_sendmmsg net/socket.c:2642 [inline]
 __x64_sys_sendmmsg+0x9d/0x110 net/socket.c:2642
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x38/0x90 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5920a75e7d
RSP: 002b:00007f59201e8028 EFLAGS: 00000246 ORIG_RAX: 0000000000000133
RAX: ffffffffffffffda RBX: 00007f5920bb4f80 RCX: 00007f5920a75e7d
RDX: 0000000000000001 RSI: 0000000020002940 RDI: 0000000000000005
RBP: 00007f5920ae7593 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000020004050 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f5920bb4f80 R15: 00007f59201c8000
 </TASK>

In the error path, tcp_sendmsg_fastopen() ends-up calling
mptcp_disconnect(), and the latter tries to close each
subflow, acquiring the socket lock on each of them.

At fastopen time, we have a single subflow, and such subflow
socket lock is already held by the called, causing the deadlock.

We already track the 'fastopen in progress' status inside the msk
socket. Use it to address the issue, making mptcp_disconnect() a
no op when invoked from the fastopen (error) path and doing the
relevant cleanup after releasing the subflow socket lock.

While at the above, rename the fastopen status bit to something
more meaningful.

Closes: https://github.com/multipath-tcp/mptcp_net-next/issues/321
Fixes: fa9e57468aa1 ("mptcp: fix abba deadlock on fastopen")
Reported-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Paolo Abeni <pabeni@redhat.com>
Signed-off-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agonfp: fix schedule in atomic context when sync mc address
Yinjun Zhang [Tue, 20 Dec 2022 15:21:00 +0000 (16:21 +0100)]
nfp: fix schedule in atomic context when sync mc address

The callback `.ndo_set_rx_mode` is called in atomic context, sleep
is not allowed in the implementation. Now use workqueue mechanism
to avoid this issue.

Fixes: de6248644966 ("nfp: add support for multicast filter")
Signed-off-by: Yinjun Zhang <yinjun.zhang@corigine.com>
Reviewed-by: Louis Peens <louis.peens@corigine.com>
Signed-off-by: Simon Horman <simon.horman@corigine.com>
Link: https://lore.kernel.org/r/20221220152100.1042774-1-simon.horman@corigine.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agovmxnet3: correctly report csum_level for encapsulated packet
Ronak Doshi [Tue, 20 Dec 2022 20:25:55 +0000 (12:25 -0800)]
vmxnet3: correctly report csum_level for encapsulated packet

Commit dacce2be3312 ("vmxnet3: add geneve and vxlan tunnel offload
support") added support for encapsulation offload. However, the
pathc did not report correctly the csum_level for encapsulated packet.

This patch fixes this issue by reporting correct csum level for the
encapsulated packet.

Fixes: dacce2be3312 ("vmxnet3: add geneve and vxlan tunnel offload support")
Signed-off-by: Ronak Doshi <doshir@vmware.com>
Acked-by: Peng Li <lpeng@vmware.com>
Link: https://lore.kernel.org/r/20221220202556.24421-1-doshir@vmware.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agonet: openvswitch: release vport resources on failure
Aaron Conole [Tue, 20 Dec 2022 21:27:17 +0000 (16:27 -0500)]
net: openvswitch: release vport resources on failure

A recent commit introducing upcall packet accounting failed to properly
release the vport object when the per-cpu stats struct couldn't be
allocated.  This can cause dangling pointers to dp objects long after
they've been released.

Cc: wangchuanlei <wangchuanlei@inspur.com>
Fixes: 1933ea365aa7 ("net: openvswitch: Add support to count upcall packets")
Reported-by: syzbot+8f4e2dcfcb3209ac35f9@syzkaller.appspotmail.com
Signed-off-by: Aaron Conole <aconole@redhat.com>
Acked-by: Eelco Chaudron <echaudro@redhat.com>
Reviewed-by: Michal Swiatkowski <michal.swiatkowski@linux.intel.com>
Link: https://lore.kernel.org/r/20221220212717.526780-1-aconole@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agonet: vrf: determine the dst using the original ifindex for multicast
Antoine Tenart [Tue, 20 Dec 2022 17:18:25 +0000 (18:18 +0100)]
net: vrf: determine the dst using the original ifindex for multicast

Multicast packets received on an interface bound to a VRF are marked as
belonging to the VRF and the skb device is updated to point to the VRF
device itself. This was fine even when a route was associated to a
device as when performing a fib table lookup 'oif' in fib6_table_lookup
(coming from 'skb->dev->ifindex' in ip6_route_input) was set to 0 when
FLOWI_FLAG_SKIP_NH_OIF was set.

With commit 40867d74c374 ("net: Add l3mdev index to flow struct and
avoid oif reset for port devices") this is not longer true and multicast
traffic is not received on the original interface.

Instead of adding back a similar check in fib6_table_lookup determine
the dst using the original ifindex for multicast VRF traffic. To make
things consistent across the function do the above for all strict
packets, which was the logic before commit 6f12fa775530 ("vrf: mark skb
for multicast or link-local as enslaved to VRF"). Note that reverting to
this behavior should be fine as the change was about marking packets
belonging to the VRF, not about their dst.

Fixes: 40867d74c374 ("net: Add l3mdev index to flow struct and avoid oif reset for port devices")
Reported-by: Jianlin Shi <jishi@redhat.com>
Signed-off-by: Antoine Tenart <atenart@kernel.org>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20221220171825.1172237-1-atenart@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agoice: xsk: do not use xdp_return_frame() on tx_buf->raw_buf
Maciej Fijalkowski [Tue, 20 Dec 2022 17:54:48 +0000 (09:54 -0800)]
ice: xsk: do not use xdp_return_frame() on tx_buf->raw_buf

Previously ice XDP xmit routine was changed in a way that it avoids
xdp_buff->xdp_frame conversion as it is simply not needed for handling
XDP_TX action and what is more it saves us CPU cycles. This routine is
re-used on ZC driver to handle XDP_TX action.

Although for XDP_TX on Rx ZC xdp_buff that comes from xsk_buff_pool is
converted to xdp_frame, xdp_frame itself is not stored inside
ice_tx_buf, we only store raw data pointer. Casting this pointer to
xdp_frame and calling against it xdp_return_frame in
ice_clean_xdp_tx_buf() results in undefined behavior.

To fix this, simply call page_frag_free() on tx_buf->raw_buf.
Later intention is to remove the buff->frame conversion in order to
simplify the codebase and improve XDP_TX performance on ZC.

Fixes: 126cdfe1007a ("ice: xsk: Improve AF_XDP ZC Tx and use batching API")
Reported-and-tested-by: Robin Cowley <robin.cowley@thehutgroup.com>
Signed-off-by: Maciej Fijalkowski <maciej.fijalkowski@intel.com>
Tested-by: Chandan Kumar Rout <chandanx.rout@intel.com> (A Contingent Worker at Intel)
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
Reviewed-by: Piotr Raczynski <piotr.raczynski@.intel.com>
Link: https://lore.kernel.org/r/20221220175448.693999-1-anthony.l.nguyen@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agoMerge tag 'wireless-2022-12-21' of git://git.kernel.org/pub/scm/linux/kernel/git...
Jakub Kicinski [Thu, 22 Dec 2022 00:44:55 +0000 (16:44 -0800)]
Merge tag 'wireless-2022-12-21' of git://git./linux/kernel/git/wireless/wireless

Kalle Valo says:

====================
wireless fixes for v6.2

First set of fixes for v6.2. Fix for a link error in mt76, fix for an
iwlwifi firmware crash and two cleanups.

* tag 'wireless-2022-12-21' of git://git.kernel.org/pub/scm/linux/kernel/git/wireless/wireless:
  wifi: ath9k: use proper statements in conditionals
  wifi: mt76: mt7996: select CONFIG_RELAY
  wifi: iwlwifi: fw: skip PPAG for JF
  wifi: ti: remove obsolete lines in the Makefile
====================

Link: https://lore.kernel.org/r/20221221180808.96A8AC433EF@smtp.kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
22 months agoselftests/bpf: Test bpf_skb_adjust_room on CHECKSUM_PARTIAL
Martin KaFai Lau [Wed, 21 Dec 2022 18:56:53 +0000 (10:56 -0800)]
selftests/bpf: Test bpf_skb_adjust_room on CHECKSUM_PARTIAL

When the bpf_skb_adjust_room() shrinks the skb such that its csum_start
is invalid, the skb->ip_summed should be reset from CHECKSUM_PARTIAL to
CHECKSUM_NONE.

The commit 54c3f1a81421 ("bpf: pull before calling skb_postpull_rcsum()")
fixed it.

This patch adds a test to ensure the skb->ip_summed changed from
CHECKSUM_PARTIAL to CHECKSUM_NONE after bpf_skb_adjust_room().

Signed-off-by: Martin KaFai Lau <martin.lau@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Stanislav Fomichev <sdf@google.com>
Link: https://lore.kernel.org/bpf/20221221185653.1589961-1-martin.lau@linux.dev
22 months agoMerge tag 'net-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Wed, 21 Dec 2022 16:41:32 +0000 (08:41 -0800)]
Merge tag 'net-6.2-rc1' of git://git./linux/kernel/git/netdev/net

Pull networking fixes from Jakub Kicinski:
 "Including fixes from bpf, netfilter and can.

  Current release - regressions:

   - bpf: synchronize dispatcher update with bpf_dispatcher_xdp_func

   - rxrpc:
      - fix security setting propagation
      - fix null-deref in rxrpc_unuse_local()
      - fix switched parameters in peer tracing

  Current release - new code bugs:

   - rxrpc:
      - fix I/O thread startup getting skipped
      - fix locking issues in rxrpc_put_peer_locked()
      - fix I/O thread stop
      - fix uninitialised variable in rxperf server
      - fix the return value of rxrpc_new_incoming_call()

   - microchip: vcap: fix initialization of value and mask

   - nfp: fix unaligned io read of capabilities word

  Previous releases - regressions:

   - stop in-kernel socket users from corrupting socket's task_frag

   - stream: purge sk_error_queue in sk_stream_kill_queues()

   - openvswitch: fix flow lookup to use unmasked key

   - dsa: mv88e6xxx: avoid reg_lock deadlock in mv88e6xxx_setup_port()

   - devlink:
      - hold region lock when flushing snapshots
      - protect devlink dump by the instance lock

  Previous releases - always broken:

   - bpf:
      - prevent leak of lsm program after failed attach
      - resolve fext program type when checking map compatibility

   - skbuff: account for tail adjustment during pull operations

   - macsec: fix net device access prior to holding a lock

   - bonding: switch back when high prio link up

   - netfilter: flowtable: really fix NAT IPv6 offload

   - enetc: avoid buffer leaks on xdp_do_redirect() failure

   - unix: fix race in SOCK_SEQPACKET's unix_dgram_sendmsg()

   - dsa: microchip: remove IRQF_TRIGGER_FALLING in
     request_threaded_irq"

* tag 'net-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (64 commits)
  net: fec: check the return value of build_skb()
  net: simplify sk_page_frag
  Treewide: Stop corrupting socket's task_frag
  net: Introduce sk_use_task_frag in struct sock.
  mctp: Remove device type check at unregister
  net: dsa: microchip: remove IRQF_TRIGGER_FALLING in request_threaded_irq
  can: kvaser_usb: hydra: help gcc-13 to figure out cmd_len
  can: flexcan: avoid unbalanced pm_runtime_enable warning
  Documentation: devlink: add missing toc entry for etas_es58x devlink doc
  mctp: serial: Fix starting value for frame check sequence
  nfp: fix unaligned io read of capabilities word
  net: stream: purge sk_error_queue in sk_stream_kill_queues()
  myri10ge: Fix an error handling path in myri10ge_probe()
  net: microchip: vcap: Fix initialization of value and mask
  rxrpc: Fix the return value of rxrpc_new_incoming_call()
  rxrpc: rxperf: Fix uninitialised variable
  rxrpc: Fix I/O thread stop
  rxrpc: Fix switched parameters in peer tracing
  rxrpc: Fix locking issues in rxrpc_put_peer_locked()
  rxrpc: Fix I/O thread startup getting skipped
  ...

22 months agoMerge tag 'fs.vfsuid.ima.v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Wed, 21 Dec 2022 16:13:01 +0000 (08:13 -0800)]
Merge tag 'fs.vfsuid.ima.v6.2-rc1' of git://git./linux/kernel/git/vfs/idmapping

Pull vfsuid cleanup from Christian Brauner:
 "This moves the ima specific vfs{g,u}id_t comparison helpers out of the
  header and into the one file in ima where they are used.

  We shouldn't incentivize people to use them by placing them into the
  header. As discussed and suggested by Linus in [1] let's just define
  them locally in the one file in ima where they are used"

Link: https://lore.kernel.org/lkml/CAHk-=wj4BpEwUd=OkTv1F9uykvSrsBNZJVHMp+p_+e2kiV71_A@mail.gmail.com
* tag 'fs.vfsuid.ima.v6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/idmapping:
  mnt_idmapping: move ima-only helpers to ima

22 months agoMerge tag 'random-6.2-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
Linus Torvalds [Wed, 21 Dec 2022 16:02:30 +0000 (08:02 -0800)]
Merge tag 'random-6.2-rc1-for-linus' of git://git./linux/kernel/git/crng/random

Pull more random number generator updates from Jason Donenfeld:
 "Two remaining changes that are now possible after you merged a few
  other trees:

   - #include <asm/archrandom.h> can be removed from random.h now,
     making the direct use of the arch_random_* API more of a private
     implementation detail between the archs and random.c, rather than
     something for general consumers.

   - Two additional uses of prandom_u32_max() snuck in during the
     initial phase of pulls, so these have been converted to
     get_random_u32_below(), and now the deprecated prandom_u32_max()
     alias -- which was just a wrapper around get_random_u32_below() --
     can be removed.

  In addition, there is one fix:

   - Check efi_rt_services_supported() before attempting to use an EFI
     runtime function.

     This affected EFI systems that disable runtime services yet still
     boot via EFI (e.g. the reporter's Lenovo Thinkpad X13s laptop), as
     well systems where EFI runtime services have been forcibly
     disabled, such as on PREEMPT_RT.

     On those machines, a very early and hard to diagnose crash would
     happen, preventing boot"

* tag 'random-6.2-rc1-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/crng/random:
  prandom: remove prandom_u32_max()
  efi: random: fix NULL-deref when refreshing seed
  random: do not include <asm/archrandom.h> from random.h