platform/kernel/linux-starfive.git
4 years agobpf: Use get_file_rcu() instead of get_file() for task_file iterator
Yonghong Song [Mon, 17 Aug 2020 17:42:14 +0000 (10:42 -0700)]
bpf: Use get_file_rcu() instead of get_file() for task_file iterator

With latest `bpftool prog` command, we observed the following kernel
panic.
    BUG: kernel NULL pointer dereference, address: 0000000000000000
    #PF: supervisor instruction fetch in kernel mode
    #PF: error_code(0x0010) - not-present page
    PGD dfe894067 P4D dfe894067 PUD deb663067 PMD 0
    Oops: 0010 [#1] SMP
    CPU: 9 PID: 6023 ...
    RIP: 0010:0x0
    Code: Bad RIP value.
    RSP: 0000:ffffc900002b8f18 EFLAGS: 00010286
    RAX: ffff8883a405f400 RBX: ffff888e46a6bf00 RCX: 000000008020000c
    RDX: 0000000000000000 RSI: 0000000000000001 RDI: ffff8883a405f400
    RBP: ffff888e46a6bf50 R08: 0000000000000000 R09: ffffffff81129600
    R10: ffff8883a405f300 R11: 0000160000000000 R12: 0000000000002710
    R13: 000000e9494b690c R14: 0000000000000202 R15: 0000000000000009
    FS:  00007fd9187fe700(0000) GS:ffff888e46a40000(0000) knlGS:0000000000000000
    CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    CR2: ffffffffffffffd6 CR3: 0000000de5d33002 CR4: 0000000000360ee0
    DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
    DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
    Call Trace:
     <IRQ>
     rcu_core+0x1a4/0x440
     __do_softirq+0xd3/0x2c8
     irq_exit+0x9d/0xa0
     smp_apic_timer_interrupt+0x68/0x120
     apic_timer_interrupt+0xf/0x20
     </IRQ>
    RIP: 0033:0x47ce80
    Code: Bad RIP value.
    RSP: 002b:00007fd9187fba40 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13
    RAX: 0000000000000002 RBX: 00007fd931789160 RCX: 000000000000010c
    RDX: 00007fd9308cdfb4 RSI: 00007fd9308cdfb4 RDI: 00007ffedd1ea0a8
    RBP: 00007fd9187fbab0 R08: 000000000000000e R09: 000000000000002a
    R10: 0000000000480210 R11: 00007fd9187fc570 R12: 00007fd9316cc400
    R13: 0000000000000118 R14: 00007fd9308cdfb4 R15: 00007fd9317a9380

After further analysis, the bug is triggered by
Commit eaaacd23910f ("bpf: Add task and task/file iterator targets")
which introduced task_file bpf iterator, which traverses all open file
descriptors for all tasks in the current namespace.
The latest `bpftool prog` calls a task_file bpf program to traverse
all files in the system in order to associate processes with progs/maps, etc.
When traversing files for a given task, rcu read_lock is taken to
access all files in a file_struct. But it used get_file() to grab
a file, which is not right. It is possible file->f_count is 0 and
get_file() will unconditionally increase it.
Later put_file() may cause all kind of issues with the above
as one of sympotoms.

The failure can be reproduced with the following steps in a few seconds:
    $ cat t.c
    #include <stdio.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <fcntl.h>
    #include <unistd.h>

    #define N 10000
    int fd[N];
    int main() {
      int i;

      for (i = 0; i < N; i++) {
        fd[i] = open("./note.txt", 'r');
        if (fd[i] < 0) {
           fprintf(stderr, "failed\n");
           return -1;
        }
      }
      for (i = 0; i < N; i++)
        close(fd[i]);

      return 0;
    }
    $ gcc -O2 t.c
    $ cat run.sh
    #/bin/bash
    for i in {1..100}
    do
      while true; do ./a.out; done &
    done
    $ ./run.sh
    $ while true; do bpftool prog >& /dev/null; done

This patch used get_file_rcu() which only grabs a file if the
file->f_count is not zero. This is to ensure the file pointer
is always valid. The above reproducer did not fail for more
than 30 minutes.

Fixes: eaaacd23910f ("bpf: Add task and task/file iterator targets")
Suggested-by: Josef Bacik <josef@toxicpanda.com>
Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Reviewed-by: Josef Bacik <josef@toxicpanda.com>
Link: https://lore.kernel.org/bpf/20200817174214.252601-1-yhs@fb.com
4 years agoRevert "net: xdp: pull ethernet header off packet after computing skb->protocol"
David S. Miller [Mon, 17 Aug 2020 18:48:05 +0000 (11:48 -0700)]
Revert "net: xdp: pull ethernet header off packet after computing skb->protocol"

This reverts commit f8414a8d886b613b90d9fdf7cda6feea313b1069.

eth_type_trans() does the necessary pull on the skb.

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agophylink: <linux/phylink.h>: fix function prototype kernel-doc warning
Randy Dunlap [Sun, 16 Aug 2020 22:25:49 +0000 (15:25 -0700)]
phylink: <linux/phylink.h>: fix function prototype kernel-doc warning

Fix a kernel-doc warning for the pcs_config() function prototype:

../include/linux/phylink.h:406: warning: Excess function parameter 'permit_pause_to_mac' description in 'pcs_config'

Fixes: 7137e18f6f88 ("net: phylink: add struct phylink_pcs")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Russell King <linux@armlinux.org.uk>
Cc: David S. Miller <davem@davemloft.net>
Cc: netdev@vger.kernel.org
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agomptcp: sendmsg: reset iter on error redux
Florian Westphal [Sun, 16 Aug 2020 21:14:20 +0000 (23:14 +0200)]
mptcp: sendmsg: reset iter on error redux

This fix wasn't correct: When this function is invoked from the
retransmission worker, the iterator contains garbage and resetting
it causes a crash.

As the work queue should not be performance critical also zero the
msghdr struct.

Fixes: 35759383133f64d "(mptcp: sendmsg: reset iter on error)"
Signed-off-by: Florian Westphal <fw@strlen.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: devlink: Remove overzealous WARN_ON with snapshots
Andrew Lunn [Sun, 16 Aug 2020 19:26:38 +0000 (21:26 +0200)]
net: devlink: Remove overzealous WARN_ON with snapshots

It is possible to trigger this WARN_ON from user space by triggering a
devlink snapshot with an ID which already exists. We don't need both
-EEXISTS being reported and spamming the kernel log.

Signed-off-by: Andrew Lunn <andrew@lunn.ch>
Tested-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agotipc: not enable tipc when ipv6 works as a module
Xin Long [Sun, 16 Aug 2020 09:32:03 +0000 (17:32 +0800)]
tipc: not enable tipc when ipv6 works as a module

When using ipv6_dev_find() in one module, it requires ipv6 not to
work as a module. Otherwise, this error occurs in build:

  undefined reference to `ipv6_dev_find'.

So fix it by adding "depends on IPV6 || IPV6=n" to tipc/Kconfig,
as it does in sctp/Kconfig.

Fixes: 5a6f6f579178 ("tipc: set ub->ifindex for local ipv6 address")
Reported-by: kernel test robot <lkp@intel.com>
Acked-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Xin Long <lucien.xin@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agotipc: fix uninit skb->data in tipc_nl_compat_dumpit()
Cong Wang [Sat, 15 Aug 2020 23:29:15 +0000 (16:29 -0700)]
tipc: fix uninit skb->data in tipc_nl_compat_dumpit()

__tipc_nl_compat_dumpit() has two callers, and it expects them to
pass a valid nlmsghdr via arg->data. This header is artificial and
crafted just for __tipc_nl_compat_dumpit().

tipc_nl_compat_publ_dump() does so by putting a genlmsghdr as well
as some nested attribute, TIPC_NLA_SOCK. But the other caller
tipc_nl_compat_dumpit() does not, this leaves arg->data uninitialized
on this call path.

Fix this by just adding a similar nlmsghdr without any payload in
tipc_nl_compat_dumpit().

This bug exists since day 1, but the recent commit 6ea67769ff33
("net: tipc: prepare attrs in __tipc_nl_compat_dumpit()") makes it
easier to appear.

Reported-and-tested-by: syzbot+0e7181deafa7e0b79923@syzkaller.appspotmail.com
Fixes: d0796d1ef63d ("tipc: convert legacy nl bearer dump to nl compat")
Cc: Jon Maloy <jmaloy@redhat.com>
Cc: Ying Xue <ying.xue@windriver.com>
Cc: Richard Alpe <richard.alpe@ericsson.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Acked-by: Ying Xue <ying.xue@windriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf
David S. Miller [Sun, 16 Aug 2020 23:05:36 +0000 (16:05 -0700)]
Merge git://git./pub/scm/linux/kernel/git/pablo/nf

Pablo Neira Ayuso says:

====================
Netfilter fixes for net

The following patchset contains Netfilter fixes for net:

1) Endianness issue in IPv4 option support in nft_exthdr,
   from Stephen Suryaputra.

2) Removes the waitcount optimization in nft_compat,
   from Florian Westphal.

3) Remove ipv6 -> nf_defrag_ipv6 module dependency, from
   Florian Westphal.

4) Memleak in chain binding support, also from Florian.

5) Simplify nft_flowtable.sh selftest, from Fabian Frederick.

6) Optional MTU arguments for selftest nft_flowtable.sh,
   also from Fabian.

7) Remove noise error report when killing process in
   selftest nft_flowtable.sh, from Fabian Frederick.

8) Reject bogus getsockopt option length in ebtables,
   from Florian Westphal.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'linux-can-fixes-for-5.9-20200815' of git://git.kernel.org/pub/scm/linux...
David S. Miller [Sun, 16 Aug 2020 23:04:14 +0000 (16:04 -0700)]
Merge tag 'linux-can-fixes-for-5.9-20200815' of git://git./linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2020-08-15

this is a pull request of 4 patches for net/master.

All patches are by Zhang Changzhong and fix broadcast related problems in the
j1939 CAN networking stack.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: Fix potential wrong skb->protocol in skb_vlan_untag()
Miaohe Lin [Sat, 15 Aug 2020 08:44:31 +0000 (04:44 -0400)]
net: Fix potential wrong skb->protocol in skb_vlan_untag()

We may access the two bytes after vlan_hdr in vlan_set_encap_proto(). So
we should pull VLAN_HLEN + sizeof(unsigned short) in skb_vlan_untag() or
we may access the wrong data.

Fixes: 0d5501c1c828 ("net: Always untag vlan-tagged traffic on input.")
Signed-off-by: Miaohe Lin <linmiaohe@huawei.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: xdp: pull ethernet header off packet after computing skb->protocol
Jason A. Donenfeld [Sat, 15 Aug 2020 07:29:30 +0000 (09:29 +0200)]
net: xdp: pull ethernet header off packet after computing skb->protocol

When an XDP program changes the ethernet header protocol field,
eth_type_trans is used to recalculate skb->protocol. In order for
eth_type_trans to work correctly, the ethernet header must actually be
part of the skb data segment, so the code first pushes that onto the
head of the skb. However, it subsequently forgets to pull it back off,
making the behavior of the passed-on packet inconsistent between the
protocol modifying case and the static protocol case. This patch fixes
the issue by simply pulling the ethernet header back off of the skb
head.

Fixes: 297249569932 ("net: fix generic XDP to handle if eth header was mangled")
Cc: Jesper Dangaard Brouer <brouer@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoipvlan: fix device features
Mahesh Bandewar [Sat, 15 Aug 2020 05:53:24 +0000 (22:53 -0700)]
ipvlan: fix device features

Processing NETDEV_FEAT_CHANGE causes IPvlan links to lose
NETIF_F_LLTX feature because of the incorrect handling of
features in ipvlan_fix_features().

--before--
lpaa10:~# ethtool -k ipvl0 | grep tx-lockless
tx-lockless: on [fixed]
lpaa10:~# ethtool -K ipvl0 tso off
Cannot change tcp-segmentation-offload
Actual changes:
vlan-challenged: off [fixed]
tx-lockless: off [fixed]
lpaa10:~# ethtool -k ipvl0 | grep tx-lockless
tx-lockless: off [fixed]
lpaa10:~#

--after--
lpaa10:~# ethtool -k ipvl0 | grep tx-lockless
tx-lockless: on [fixed]
lpaa10:~# ethtool -K ipvl0 tso off
Cannot change tcp-segmentation-offload
Could not change any device features
lpaa10:~# ethtool -k ipvl0 | grep tx-lockless
tx-lockless: on [fixed]
lpaa10:~#

Fixes: 2ad7bf363841 ("ipvlan: Initial check-in of the IPVLAN driver.")
Signed-off-by: Mahesh Bandewar <maheshb@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobonding: fix a potential double-unregister
Cong Wang [Sat, 15 Aug 2020 03:05:58 +0000 (20:05 -0700)]
bonding: fix a potential double-unregister

When we tear down a network namespace, we unregister all
the netdevices within it. So we may queue a slave device
and a bonding device together in the same unregister queue.

If the only slave device is non-ethernet, it would
automatically unregister the bonding device as well. Thus,
we may end up unregistering the bonding device twice.

Workaround this special case by checking reg_state.

Fixes: 9b5e383c11b0 ("net: Introduce unregister_netdevice_many()")
Reported-by: syzbot+af23e7f3e0a7e10c8b67@syzkaller.appspotmail.com
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Signed-off-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agocan: j1939: add rxtimer for multipacket broadcast session
Zhang Changzhong [Wed, 5 Aug 2020 03:50:25 +0000 (11:50 +0800)]
can: j1939: add rxtimer for multipacket broadcast session

According to SAE J1939/21 (Chapter 5.12.3 and APPENDIX C), for transmit side
the required time interval between packets of a multipacket broadcast message
is 50 to 200 ms, the responder shall use a timeout of 250ms (provides margin
allowing for the maximumm spacing of 200ms). For receive side a timeout will
occur when a time of greater than 750 ms elapsed between two message packets
when more packets were expected.

So this patch fix and add rxtimer for multipacket broadcast session.

Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1596599425-5534-5-git-send-email-zhangchangzhong@huawei.com
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
4 years agocan: j1939: abort multipacket broadcast session when timeout occurs
Zhang Changzhong [Wed, 5 Aug 2020 03:50:24 +0000 (11:50 +0800)]
can: j1939: abort multipacket broadcast session when timeout occurs

If timeout occurs, j1939_tp_rxtimer() first calls hrtimer_start() to restart
rxtimer, and then calls __j1939_session_cancel() to set session->state =
J1939_SESSION_WAITING_ABORT. At next timeout expiration, because of the
J1939_SESSION_WAITING_ABORT session state j1939_tp_rxtimer() will call
j1939_session_deactivate_activate_next() to deactivate current session, and
rxtimer won't be set.

But for multipacket broadcast session, __j1939_session_cancel() don't set
session->state = J1939_SESSION_WAITING_ABORT, thus current session won't be
deactivate and hrtimer_start() is called to start new rxtimer again and again.

So fix it by moving session->state = J1939_SESSION_WAITING_ABORT out of if
(!j1939_cb_is_broadcast(&session->skcb)) statement.

Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1596599425-5534-4-git-send-email-zhangchangzhong@huawei.com
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
4 years agocan: j1939: cancel rxtimer on multipacket broadcast session complete
Zhang Changzhong [Wed, 5 Aug 2020 03:50:23 +0000 (11:50 +0800)]
can: j1939: cancel rxtimer on multipacket broadcast session complete

If j1939_xtp_rx_dat_one() receive last frame of multipacket broadcast message,
j1939_session_timers_cancel() should be called to cancel rxtimer.

Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1596599425-5534-3-git-send-email-zhangchangzhong@huawei.com
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
4 years agocan: j1939: fix support for multipacket broadcast message
Zhang Changzhong [Wed, 5 Aug 2020 03:50:22 +0000 (11:50 +0800)]
can: j1939: fix support for multipacket broadcast message

Currently j1939_tp_im_involved_anydir() in j1939_tp_recv() check the previously
set flags J1939_ECU_LOCAL_DST and J1939_ECU_LOCAL_SRC of incoming skb, thus
multipacket broadcast message was aborted by receive side because it may come
from remote ECUs and have no exact dst address. Similarly, j1939_tp_cmd_recv()
and j1939_xtp_rx_dat() didn't process broadcast message.

So fix it by checking and process broadcast message in j1939_tp_recv(),
j1939_tp_cmd_recv() and j1939_xtp_rx_dat().

Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Zhang Changzhong <zhangchangzhong@huawei.com>
Link: https://lore.kernel.org/r/1596599425-5534-2-git-send-email-zhangchangzhong@huawei.com
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
4 years agonet: fddi: skfp: cfm: Remove seemingly unused variable 'ID_sccs'
Lee Jones [Fri, 14 Aug 2020 11:39:32 +0000 (12:39 +0100)]
net: fddi: skfp: cfm: Remove seemingly unused variable 'ID_sccs'

This variable is present in many source files and has not been used
anywhere (at least internally) since it was introduced.

Fixes the following W=1 kernel build warning(s):

 drivers/net/fddi/skfp/cfm.c: In function ‘cfm’:
 drivers/net/fddi/skfp/cfm.c:211:6: warning: variable ‘oldstate’ set but not used [-Wunused-but-set-variable]
 drivers/net/fddi/skfp/cfm.c:40:19: warning: ‘ID_sccs’ defined but not used [-Wunused-const-variable=]

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Lee Jones <lee.jones@linaro.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: fddi: skfp: cfm: Remove set but unused variable 'oldstate'
Lee Jones [Fri, 14 Aug 2020 11:39:31 +0000 (12:39 +0100)]
net: fddi: skfp: cfm: Remove set but unused variable 'oldstate'

While we're at it, remove some code which has never been invoked.

Keep the comment though, as it seems potentially half useful.

Fixes the following W=1 kernel build warning(s):

 drivers/net/fddi/skfp/cfm.c: In function ‘cfm’:
 drivers/net/fddi/skfp/cfm.c:211:6: warning: variable ‘oldstate’ set but not used [-Wunused-but-set-variable]

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: fddi: skfp: smt: Remove seemingly unused variable 'ID_sccs'
Lee Jones [Fri, 14 Aug 2020 11:39:30 +0000 (12:39 +0100)]
net: fddi: skfp: smt: Remove seemingly unused variable 'ID_sccs'

This variable is present in many source files and has not been used
anywhere (at least internally) since it was introduced.

Fixes the following W=1 kernel build warning(s):

 drivers/net/fddi/skfp/smt.c:24:19: warning: ‘ID_sccs’ defined but not used [-Wunused-const-variable=]

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: fddi: skfp: smt: Place definition of 'smt_pdef' under same stipulations as its use
Lee Jones [Fri, 14 Aug 2020 11:39:24 +0000 (12:39 +0100)]
net: fddi: skfp: smt: Place definition of 'smt_pdef' under same stipulations as its use

The variable 'smt_pdef' is only used if LITTLE_ENDIAN is set, so only
define it if this is the case.

Fixes the following W=1 kernel build warning(s):

 drivers/net/fddi/skfp/smt.c:1572:3: warning: ‘smt_pdef’ defined but not used [-Wunused-const-variable=]

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: fddi: skfp: fplustm: Remove seemingly unused variable 'ID_sccs'
Lee Jones [Fri, 14 Aug 2020 11:39:22 +0000 (12:39 +0100)]
net: fddi: skfp: fplustm: Remove seemingly unused variable 'ID_sccs'

This variable is present in many source files and has not been used
anywhere (at least internally) since it was introduced.

Fixes the following W=1 kernel build warning(s):

 drivers/net/fddi/skfp/fplustm.c:25:19: warning: ‘ID_sccs’ defined but not used [-Wunused-const-variable=]

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: netdev@vger.kernel.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: fddi: skfp: hwmtm: Remove seemingly unused variable 'ID_sccs'
Lee Jones [Fri, 14 Aug 2020 11:39:21 +0000 (12:39 +0100)]
net: fddi: skfp: hwmtm: Remove seemingly unused variable 'ID_sccs'

This variable is present in many source files and has not been used
anywhere (at least internally) since it was introduced.

Fixes the following W=1 kernel build warning(s):

 drivers/net/fddi/skfp/hwmtm.c:14:19: warning: ‘ID_sccs’ defined but not used [-Wunused-const-variable=]

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: wan: dlci: Remove set but not used variable 'err'
Lee Jones [Fri, 14 Aug 2020 11:39:13 +0000 (12:39 +0100)]
net: wan: dlci: Remove set but not used variable 'err'

Fixes the following W=1 kernel build warning(s):

 drivers/net/wan/dlci.c: In function ‘dlci_close’:
 drivers/net/wan/dlci.c:298:8: warning: variable ‘err’ set but not used [-Wunused-but-set-variable]

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Mike McLagan <mike.mclagan@linux.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ethernet: 8390: axnet_cs: Document unused parameter 'txqueue'
Lee Jones [Fri, 14 Aug 2020 11:39:09 +0000 (12:39 +0100)]
net: ethernet: 8390: axnet_cs: Document unused parameter 'txqueue'

Fixes the following W=1 kernel build warning(s):

 drivers/net/ethernet/8390/axnet_cs.c:907: warning: Function parameter or member 'txqueue' not described in 'axnet_tx_timeout'

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Martin Habets <mhabets@solarflare.com>
Cc: Shannon Nelson <snelson@pensando.io>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: William Lee <william@asix.com.tw>
Cc: "A. Hinds --" <dahinds@users.sourceforge.net>
Cc: reached at <becker@scyld.com>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: bonding: bond_alb: Describe alb_handle_addr_collision_on_attach()'s 'bond' and...
Lee Jones [Fri, 14 Aug 2020 11:39:07 +0000 (12:39 +0100)]
net: bonding: bond_alb: Describe alb_handle_addr_collision_on_attach()'s 'bond' and 'addr' params

Fixes the following W=1 kernel build warning(s):

 drivers/net/bonding/bond_alb.c:1222: warning: Function parameter or member 'bond' not described in 'alb_set_mac_address'

Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: ethernet: 3com: 3c574_cs: Remove set but unused variables 'tx' and 'rx'
Lee Jones [Fri, 14 Aug 2020 11:39:06 +0000 (12:39 +0100)]
net: ethernet: 3com: 3c574_cs: Remove set but unused variables 'tx' and 'rx'

Fixes the following W=1 kernel build warning(s):

 drivers/net/ethernet/3com/3c574_cs.c: In function ‘update_stats’:
 drivers/net/ethernet/3com/3c574_cs.c:954:9: warning: variable ‘tx’ set but not used [-Wunused-but-set-variable]
 954 | u8 rx, tx, up;
 | ^~
 drivers/net/ethernet/3com/3c574_cs.c:954:5: warning: variable ‘rx’ set but not used [-Wunused-but-set-variable]
 954 | u8 rx, tx, up;
 | ^~

Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Shannon Nelson <snelson@pensando.io>
Cc: Heiner Kallweit <hkallweit1@gmail.com>
Cc: Martin Habets <mhabets@solarflare.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Donald Becker <becker@scyld.com>
Cc: David Hinds <dahinds@users.sourceforge.net>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: bonding: bond_main: Document 'proto' and rename 'new_active' parameters
Lee Jones [Fri, 14 Aug 2020 11:39:05 +0000 (12:39 +0100)]
net: bonding: bond_main: Document 'proto' and rename 'new_active' parameters

Fixes the following W=1 kernel build warning(s):

 drivers/net/bonding/bond_main.c:329: warning: Function parameter or member 'proto' not described in 'bond_vlan_rx_add_vid'
 drivers/net/bonding/bond_main.c:362: warning: Function parameter or member 'proto' not described in 'bond_vlan_rx_kill_vid'
 drivers/net/bonding/bond_main.c:964: warning: Function parameter or member 'new_active' not described in 'bond_change_active_slave'
 drivers/net/bonding/bond_main.c:964: warning: Excess function parameter 'new' description in 'bond_change_active_slave'

Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: Thomas Davis <tadavis@lbl.gov>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: bonding: bond_3ad: Fix a bunch of kerneldoc parameter issues
Lee Jones [Fri, 14 Aug 2020 11:39:04 +0000 (12:39 +0100)]
net: bonding: bond_3ad: Fix a bunch of kerneldoc parameter issues

Renames and missing descriptions.

Fixes the following W=1 kernel build warning(s):

 drivers/net/bonding/bond_3ad.c:140: warning: Function parameter or member 'port' not described in '__get_first_agg'
 drivers/net/bonding/bond_3ad.c:140: warning: Excess function parameter 'bond' description in '__get_first_agg'
 drivers/net/bonding/bond_3ad.c:1655: warning: Function parameter or member 'agg' not described in 'ad_agg_selection_logic'
 drivers/net/bonding/bond_3ad.c:1655: warning: Excess function parameter 'aggregator' description in 'ad_agg_selection_logic'
 drivers/net/bonding/bond_3ad.c:1817: warning: Function parameter or member 'port' not described in 'ad_initialize_port'
 drivers/net/bonding/bond_3ad.c:1817: warning: Excess function parameter 'aggregator' description in 'ad_initialize_port'
 drivers/net/bonding/bond_3ad.c:1976: warning: Function parameter or member 'timeout' not described in 'bond_3ad_initiate_agg_selection'
 drivers/net/bonding/bond_3ad.c:2274: warning: Function parameter or member 'work' not described in 'bond_3ad_state_machine_handler'
 drivers/net/bonding/bond_3ad.c:2274: warning: Excess function parameter 'bond' description in 'bond_3ad_state_machine_handler'
 drivers/net/bonding/bond_3ad.c:2508: warning: Function parameter or member 'link' not described in 'bond_3ad_handle_link_change'
 drivers/net/bonding/bond_3ad.c:2508: warning: Excess function parameter 'status' description in 'bond_3ad_handle_link_change'
 drivers/net/bonding/bond_3ad.c:2566: warning: Function parameter or member 'bond' not described in 'bond_3ad_set_carrier'
 drivers/net/bonding/bond_3ad.c:2677: warning: Function parameter or member 'bond' not described in 'bond_3ad_update_lacp_rate'
 drivers/net/bonding/bond_3ad.c:1655: warning: Function parameter or member 'agg' not described in 'ad_agg_selection_logic'
 drivers/net/bonding/bond_3ad.c:1655: warning: Excess function parameter 'aggregator' description in 'ad_agg_selection_logic'
 drivers/net/bonding/bond_3ad.c:1817: warning: Function parameter or member 'port' not described in 'ad_initialize_port'
 drivers/net/bonding/bond_3ad.c:1817: warning: Excess function parameter 'aggregator' description in 'ad_initialize_port'
 drivers/net/bonding/bond_3ad.c:1976: warning: Function parameter or member 'timeout' not described in 'bond_3ad_initiate_agg_selection'
 drivers/net/bonding/bond_3ad.c:2274: warning: Function parameter or member 'work' not described in 'bond_3ad_state_machine_handler'
 drivers/net/bonding/bond_3ad.c:2274: warning: Excess function parameter 'bond' description in 'bond_3ad_state_machine_handler'
 drivers/net/bonding/bond_3ad.c:2508: warning: Function parameter or member 'link' not described in 'bond_3ad_handle_link_change'
 drivers/net/bonding/bond_3ad.c:2508: warning: Excess function parameter 'status' description in 'bond_3ad_handle_link_change'
 drivers/net/bonding/bond_3ad.c:2566: warning: Function parameter or member 'bond' not described in 'bond_3ad_set_carrier'
 drivers/net/bonding/bond_3ad.c:2677: warning: Function parameter or member 'bond' not described in 'bond_3ad_update_lacp_rate'

Cc: Jay Vosburgh <j.vosburgh@gmail.com>
Cc: Veaceslav Falico <vfalico@gmail.com>
Cc: Andy Gospodarek <andy@greyhouse.net>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Jakub Kicinski <kuba@kernel.org>
Cc: netdev@vger.kernel.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agodrivers/net/wan/hdlc_x25: Added needed_headroom and a skb->len check
Xie He [Thu, 13 Aug 2020 18:17:04 +0000 (11:17 -0700)]
drivers/net/wan/hdlc_x25: Added needed_headroom and a skb->len check

1. Added a skb->len check

This driver expects upper layers to include a pseudo header of 1 byte
when passing down a skb for transmission. This driver will read this
1-byte header. This patch added a skb->len check before reading the
header to make sure the header exists.

2. Added needed_headroom and set hard_header_len to 0

When this driver transmits data,
  first this driver will remove a pseudo header of 1 byte,
  then the lapb module will prepend the LAPB header of 2 or 3 bytes.
So the value of needed_headroom in this driver should be 3 - 1.

Because this driver has no header_ops, according to the logic of
af_packet.c, the value of hard_header_len should be 0.

Reason of setting needed_headroom and hard_header_len at this place:

This driver is written using the API of the hdlc module, the hdlc
module enables this driver (the protocol driver) to run on any hardware
that has a driver (the hardware driver) written using the API of the
hdlc module.

Two other hdlc protocol drivers - hdlc_ppp and hdlc_raw_eth, also set
things like hard_header_len at this place. In hdlc_ppp, it sets
hard_header_len after attach_hdlc_protocol and before setting dev->type.
In hdlc_raw_eth, it sets hard_header_len by calling ether_setup after
attach_hdlc_protocol and after memcpy the settings.

3. Reset needed_headroom when detaching protocols (in hdlc.c)

When detaching a protocol from a hardware device, the hdlc module will
reset various parameters of the device (including hard_header_len) to
the default values. We add needed_headroom here so that needed_headroom
will also be reset.

Cc: Willem de Bruijn <willemdebruijn.kernel@gmail.com>
Cc: Martin Schiller <ms@dev.tdt.de>
Cc: Andrew Hendry <andrew.hendry@gmail.com>
Signed-off-by: Xie He <xie.he.0141@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agobonding: show saner speed for broadcast mode
Jarod Wilson [Thu, 13 Aug 2020 14:09:00 +0000 (10:09 -0400)]
bonding: show saner speed for broadcast mode

Broadcast mode bonds transmit a copy of all traffic simultaneously out of
all interfaces, so the "speed" of the bond isn't really the aggregate of
all interfaces, but rather, the speed of the slowest active interface.

Also, the type of the speed field is u32, not unsigned long, so adjust
that accordingly, as required to make min() function here without
complaining about mismatching types.

Fixes: bb5b052f751b ("bond: add support to read speed and duplex via ethtool")
CC: Jay Vosburgh <j.vosburgh@gmail.com>
CC: Veaceslav Falico <vfalico@gmail.com>
CC: Andy Gospodarek <andy@greyhouse.net>
CC: "David S. Miller" <davem@davemloft.net>
CC: netdev@vger.kernel.org
Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: Jarod Wilson <jarod@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf
David S. Miller [Sat, 15 Aug 2020 00:12:23 +0000 (17:12 -0700)]
Merge git://git./pub/scm/linux/kernel/git/bpf/bpf

Daniel Borkmann says:

====================
pull-request: bpf 2020-08-15

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

We've added 23 non-merge commits during the last 4 day(s) which contain
a total of 32 files changed, 421 insertions(+), 141 deletions(-).

The main changes are:

1) Fix sock_ops ctx access splat due to register override, from John Fastabend.

2) Batch of various fixes to libbpf, bpftool, and selftests when testing build
   in 32-bit mode, from Andrii Nakryiko.

3) Fix vmlinux.h generation on ARM by mapping GCC built-in types (__Poly*_t)
   to equivalent ones clang can work with, from Jean-Philippe Brucker.

4) Fix build_id lookup in bpf_get_stackid() helper by walking all NOTE ELF
   sections instead of just first, from Jiri Olsa.

5) Avoid use of __builtin_offsetof() in libbpf for CO-RE, from Yonghong Song.

6) Fix segfault in test_mmap due to inconsistent length params, from Jianlin Lv.

7) Don't override errno in libbpf when logging errors, from Toke Høiland-Jørgensen.

8) Fix v4_to_v6 sockaddr conversion in sk_lookup test, from Stanislav Fomichev.

9) Add link to bpf-helpers(7) man page to BPF doc, from Joe Stringer.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agonet: fec: correct the error path for regulator disable in probe
Fugang Duan [Thu, 13 Aug 2020 07:13:14 +0000 (15:13 +0800)]
net: fec: correct the error path for regulator disable in probe

Correct the error path for regulator disable.

Fixes: 9269e5560b26 ("net: fec: add phy-reset-gpios PROBE_DEFER check")
Signed-off-by: Fugang Duan <fugang.duan@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agodocs: networking: bonding.rst resources section cleanup
Nivedita Singhvi [Thu, 13 Aug 2020 05:10:05 +0000 (10:40 +0530)]
docs: networking: bonding.rst resources section cleanup

Removed obsolete resources from bonding.rst doc:
   - bonding-devel@lists.sourceforge.net hasn't been used since 2008
   - admin interface is 404
   - Donald Becker's domain/content no longer online

Signed-off-by: Nivedita Singhvi <nivedita.singhvi@canonical.com>
Acked-by: Jay Vosburgh <jay.vosburgh@canonical.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge branch '40GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/jkirsher/net...
David S. Miller [Fri, 14 Aug 2020 23:42:23 +0000 (16:42 -0700)]
Merge branch '40GbE' of git://git./linux/kernel/git/jkirsher/net-queue

Tony Nguyen says:

====================
Intel Wired LAN Driver Updates 2020-08-14

This series contains updates to i40e and igc drivers.

Vinicius fixes an issue with PTP spinlock being accessed before
initialization.

Przemyslaw fixes an issue with trusted VFs seeing additional traffic.

Grzegorz adds a wait for pending resets on driver removal to prevent
null pointer dereference.

v2: Fix function parameter for hw/aq in patch 2. Fix fixes tag in patch 3.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoi40e: Fix crash during removing i40e driver
Grzegorz Szczurek [Tue, 11 Aug 2020 10:56:49 +0000 (10:56 +0000)]
i40e: Fix crash during removing i40e driver

Fix the reason of crashing system by add waiting time to finish reset
recovery process before starting remove driver procedure.
Now VSI is releasing if VSI is not in reset recovery mode.
Without this fix it was possible to start remove driver if other
processing command need reset recovery procedure which resulted in
null pointer dereference. VSI used by the ethtool process has been
cleared by remove driver process.

[ 6731.508665] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 6731.508668] #PF: supervisor read access in kernel mode
[ 6731.508670] #PF: error_code(0x0000) - not-present page
[ 6731.508671] PGD 0 P4D 0
[ 6731.508674] Oops: 0000 [#1] SMP PTI
[ 6731.508679] Hardware name: Intel Corporation S2600WT2R/S2600WT2R, BIOS SE5C610.86B.01.01.0021.032120170601 03/21/2017
[ 6731.508694] RIP: 0010:i40e_down+0x252/0x310 [i40e]
[ 6731.508696] Code: c7 78 de fa c0 e8 61 02 3a c1 66 83 bb f6 0c 00 00 00 0f 84 bf 00 00 00 45 31 e4 45 31 ff eb 03 41 89 c7 48 8b 83 98 0c 00 00 <4a> 8b 3c 20 e8 a5 79 02 00 48 83 bb d0 0c 00 00 00 74 10 48 8b 83
[ 6731.508698] RSP: 0018:ffffb75ac7b3faf0 EFLAGS: 00010246
[ 6731.508700] RAX: 0000000000000000 RBX: ffff9c9874bd5000 RCX: 0000000000000007
[ 6731.508701] RDX: 0000000000000000 RSI: 0000000000000096 RDI: ffff9c987f4d9780
[ 6731.508703] RBP: ffffb75ac7b3fb30 R08: 0000000000005b60 R09: 0000000000000004
[ 6731.508704] R10: ffffb75ac64fbd90 R11: 0000000000000001 R12: 0000000000000000
[ 6731.508706] R13: ffff9c97a08e0000 R14: ffff9c97a08e0a68 R15: 0000000000000000
[ 6731.508708] FS:  00007f2617cd2740(0000) GS:ffff9c987f4c0000(0000) knlGS:0000000000000000
[ 6731.508710] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 6731.508711] CR2: 0000000000000000 CR3: 0000001e765c4006 CR4: 00000000003606e0
[ 6731.508713] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 6731.508714] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 6731.508715] Call Trace:
[ 6731.508734]  i40e_vsi_close+0x84/0x90 [i40e]
[ 6731.508742]  i40e_quiesce_vsi.part.98+0x3c/0x40 [i40e]
[ 6731.508749]  i40e_pf_quiesce_all_vsi+0x55/0x60 [i40e]
[ 6731.508757]  i40e_prep_for_reset+0x59/0x130 [i40e]
[ 6731.508765]  i40e_reconfig_rss_queues+0x5a/0x120 [i40e]
[ 6731.508774]  i40e_set_channels+0xda/0x170 [i40e]
[ 6731.508778]  ethtool_set_channels+0xe9/0x150
[ 6731.508781]  dev_ethtool+0x1b94/0x2920
[ 6731.508805]  dev_ioctl+0xc2/0x590
[ 6731.508811]  sock_do_ioctl+0xae/0x150
[ 6731.508813]  sock_ioctl+0x34f/0x3c0
[ 6731.508821]  ksys_ioctl+0x98/0xb0
[ 6731.508828]  __x64_sys_ioctl+0x1a/0x20
[ 6731.508831]  do_syscall_64+0x57/0x1c0
[ 6731.508835]  entry_SYSCALL_64_after_hwframe+0x44/0xa9

Fixes: 4b8164467b85 ("i40e: Add common function for finding VSI by type")
Signed-off-by: Grzegorz Szczurek <grzegorzx.szczurek@intel.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agoi40e: Set RX_ONLY mode for unicast promiscuous on VLAN
Przemyslaw Patynowski [Thu, 6 Aug 2020 13:40:59 +0000 (13:40 +0000)]
i40e: Set RX_ONLY mode for unicast promiscuous on VLAN

Trusted VF with unicast promiscuous mode set, could listen to TX
traffic of other VFs.
Set unicast promiscuous mode to RX traffic, if VSI has port VLAN
configured. Rename misleading I40E_AQC_SET_VSI_PROMISC_TX bit to
I40E_AQC_SET_VSI_PROMISC_RX_ONLY. Aligned unicast promiscuous with
VLAN to the one without VLAN.

Fixes: 6c41a7606967 ("i40e: Add promiscuous on VLAN support")
Fixes: 3b1200891b7f ("i40e: When in promisc mode apply promisc mode to Tx Traffic as well")
Signed-off-by: Przemyslaw Patynowski <przemyslawx.patynowski@intel.com>
Signed-off-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Tested-by: Andrew Bowers <andrewx.bowers@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agomptcp: sendmsg: reset iter on error
Florian Westphal [Fri, 14 Aug 2020 13:56:34 +0000 (15:56 +0200)]
mptcp: sendmsg: reset iter on error

Once we've copied data from the iterator we need to revert in case we
end up not sending any data.

This bug doesn't trigger with normal 'poll' based tests, because
we only feed a small chunk of data to kernel after poll indicated
POLLOUT.  With blocking IO and large writes this triggers. Receiver
ends up with less data than it should get.

Fixes: 72511aab95c94d ("mptcp: avoid blocking in tcp_sendpages")
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Mat Martineau <mathew.j.martineau@linux.intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agosfc: check hash is valid before using it
Edward Cree [Fri, 14 Aug 2020 12:26:22 +0000 (13:26 +0100)]
sfc: check hash is valid before using it

On EF100, the RX hash field in the packet prefix may not be valid (e.g.
 if the header parse failed), and this is indicated by a one-bit flag
 elsewhere in the packet prefix.  Only call skb_set_hash() if the
 RSS_HASH_VALID bit is set.

Signed-off-by: Edward Cree <ecree@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'linux-can-fixes-for-5.9-20200814' of git://git.kernel.org/pub/scm/linux...
David S. Miller [Fri, 14 Aug 2020 20:57:56 +0000 (13:57 -0700)]
Merge tag 'linux-can-fixes-for-5.9-20200814' of git://git./linux/kernel/git/mkl/linux-can

Marc Kleine-Budde says:

====================
pull-request: can 2020-08-14

this is a pull request of 6 patches for net/master. All patches fix problems in
the j1939 CAN networking stack.

The first patch is by Eric Dumazet fixes a kernel-infoleak in
j1939_sk_sock2sockaddr_can().

The remaining 5 patches are by Oleksij Rempel and fix recption of j1939
messages not orginated by the stack, a use-after-free in j1939_tp_txtimer(),
ensure that the CAN driver has a ml_priv allocated. These problem were found by
google's syzbot. Further ETP sessions with block size of less than 255 are
fixed and a sanity check was added to j1939_xtp_rx_dat_one() to detect packet
corruption.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'powerpc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc...
Linus Torvalds [Fri, 14 Aug 2020 20:40:27 +0000 (13:40 -0700)]
Merge tag 'powerpc-5.9-2' of git://git./linux/kernel/git/powerpc/linux

Pull powerpc fix from Michael Ellerman:
 "One fix for a boot crash on some platforms introduced by the recent
  pkey refactoring.

  Thanks to Christian Zigotzky and Aneesh Kumar K.V"

* tag 'powerpc-5.9-2' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/pkeys: Fix boot failures with Nemo board (A-EON AmigaOne X1000)

4 years agoMerge tag 'for-linus-5.9-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 14 Aug 2020 20:34:37 +0000 (13:34 -0700)]
Merge tag 'for-linus-5.9-rc1b-tag' of git://git./linux/kernel/git/xen/tip

Pull more xen updates from Juergen Gross:

 - Remove support for running as 32-bit Xen PV-guest.

   32-bit PV guests are rarely used, are lacking security fixes for
   Meltdown, and can be easily replaced by PVH mode. Another series for
   doing more cleanup will follow soon (removal of 32-bit-only pvops
   functionality).

 - Fixes and additional features for the Xen display frontend driver.

* tag 'for-linus-5.9-rc1b-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/xen/tip:
  drm/xen-front: Pass dumb buffer data offset to the backend
  xen: Sync up with the canonical protocol definition in Xen
  drm/xen-front: Add YUYV to supported formats
  drm/xen-front: Fix misused IS_ERR_OR_NULL checks
  xen/gntdev: Fix dmabuf import with non-zero sgt offset
  x86/xen: drop tests for highmem in pv code
  x86/xen: eliminate xen-asm_64.S
  x86/xen: remove 32-bit Xen PV guest support

4 years agoMerge tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git...
Linus Torvalds [Fri, 14 Aug 2020 20:31:25 +0000 (13:31 -0700)]
Merge tag 'hyperv-fixes-signed' of git://git./linux/kernel/git/hyperv/linux

Pull hyper-v fixes from Wei Liu:

 - fix oops reporting on Hyper-V

 - make objtool happy

* tag 'hyperv-fixes-signed' of git://git.kernel.org/pub/scm/linux/kernel/git/hyperv/linux:
  x86/hyperv: Make hv_setup_sched_clock inline
  Drivers: hv: vmbus: Only notify Hyper-V for die events that are oops

4 years agox86/fsgsbase/64: Fix NULL deref in 86_fsgsbase_read_task
Eric Dumazet [Fri, 14 Aug 2020 18:16:17 +0000 (11:16 -0700)]
x86/fsgsbase/64: Fix NULL deref in 86_fsgsbase_read_task

syzbot found its way in 86_fsgsbase_read_task() and triggered this oops:

   KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
   CPU: 0 PID: 6866 Comm: syz-executor262 Not tainted 5.8.0-syzkaller #0
   RIP: 0010:x86_fsgsbase_read_task+0x16d/0x310 arch/x86/kernel/process_64.c:393
   Call Trace:
     putreg32+0x3ab/0x530 arch/x86/kernel/ptrace.c:876
     genregs32_set arch/x86/kernel/ptrace.c:1026 [inline]
     genregs32_set+0xa4/0x100 arch/x86/kernel/ptrace.c:1006
     copy_regset_from_user include/linux/regset.h:326 [inline]
     ia32_arch_ptrace arch/x86/kernel/ptrace.c:1061 [inline]
     compat_arch_ptrace+0x36c/0xd90 arch/x86/kernel/ptrace.c:1198
     __do_compat_sys_ptrace kernel/ptrace.c:1420 [inline]
     __se_compat_sys_ptrace kernel/ptrace.c:1389 [inline]
     __ia32_compat_sys_ptrace+0x220/0x2f0 kernel/ptrace.c:1389
     do_syscall_32_irqs_on arch/x86/entry/common.c:84 [inline]
     __do_fast_syscall_32+0x57/0x80 arch/x86/entry/common.c:126
     do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:149
     entry_SYSENTER_compat_after_hwframe+0x4d/0x5c

This can happen if ptrace() or sigreturn() pokes an LDT selector into FS
or GS for a task with no LDT and something tries to read the base before
a return to usermode notices the bad selector and fixes it.

The fix is to make sure ldt pointer is not NULL.

Fixes: 07e1d88adaae ("x86/fsgsbase/64: Fix ptrace() to read the FS/GS base accurately")
Co-developed-by: Jann Horn <jannh@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Chang S. Bae <chang.seok.bae@intel.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Markus T Metzger <markus.t.metzger@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Shankar <ravi.v.shankar@intel.com>
Cc: Rik van Riel <riel@surriel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
4 years agoMerge branch 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6
Linus Torvalds [Fri, 14 Aug 2020 20:09:15 +0000 (13:09 -0700)]
Merge branch 'linus' of git://git./linux/kernel/git/herbert/crypto-2.6

Pull crypto fix from Herbert Xu:
 "This fixes a regression in af_alg"

* 'linus' of git://git.kernel.org/pub/scm/linux/kernel/git/herbert/crypto-2.6:
  crypto: algif_aead - fix uninitialized ctx->init

4 years agoMerge tag 'modules-for-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu...
Linus Torvalds [Fri, 14 Aug 2020 18:07:02 +0000 (11:07 -0700)]
Merge tag 'modules-for-v5.9' of git://git./linux/kernel/git/jeyu/linux

Pull module updates from Jessica Yu:
 "The most important change would be Christoph Hellwig's patch
  implementing proprietary taint inheritance, in an effort to discourage
  the creation of GPL "shim" modules that interface between GPL symbols
  and proprietary symbols.

  Summary:

   - Have modules that use symbols from proprietary modules inherit the
     TAINT_PROPRIETARY_MODULE taint, in an effort to prevent GPL shim
     modules that are used to circumvent _GPL exports. These are modules
     that claim to be GPL licensed while also using symbols from
     proprietary modules. Such modules will be rejected while non-GPL
     modules will inherit the proprietary taint.

   - Module export space cleanup. Unexport symbols that are unused
     outside of module.c or otherwise used in only built-in code"

* tag 'modules-for-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/jeyu/linux:
  modules: inherit TAINT_PROPRIETARY_MODULE
  modules: return licensing information from find_symbol
  modules: rename the licence field in struct symsearch to license
  modules: unexport __module_address
  modules: unexport __module_text_address
  modules: mark each_symbol_section static
  modules: mark find_symbol static
  modules: mark ref_module static
  modules: linux/moduleparam.h: drop duplicated word in a comment

4 years agoMerge tag 'kconfig-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy...
Linus Torvalds [Fri, 14 Aug 2020 18:04:45 +0000 (11:04 -0700)]
Merge tag 'kconfig-v5.9' of git://git./linux/kernel/git/masahiroy/linux-kbuild

Pull Kconfig updates from Masahiro Yamada:

 - remove '---help---' keyword support

 - fix mouse events for 'menuconfig' symbols in search view of qconf

 - code cleanups of qconf

* tag 'kconfig-v5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (24 commits)
  kconfig: qconf: move setOptionMode() to ConfigList from ConfigView
  kconfig: qconf: do not limit the pop-up menu to the first row
  kconfig: qconf: refactor icon setups
  kconfig: qconf: remove unused voidPix, menuInvPix
  kconfig: qconf: remove ConfigItem::text/setText
  kconfig: qconf: remove ConfigList::addColumn/removeColumn
  kconfig: qconf: remove ConfigItem::pixmap/setPixmap
  kconfig: qconf: drop more localization code
  kconfig: qconf: remove 'parent' from ConfigList::updateMenuList()
  kconfig: qconf: remove unused argument from ConfigView::updateList()
  kconfig: qconf: remove unused argument from ConfigList::updateList()
  kconfig: qconf: omit parent to QHBoxLayout()
  kconfig: qconf: remove name from ConfigSearchWindow constructor
  kconfig: qconf: remove unused ConfigList::listView()
  kconfig: qconf: overload addToolBar() to create and insert toolbar
  kconfig: qconf: remove toolBar from ConfigMainWindow members
  kconfig: qconf: use 'menu' variable for (QMenu *)
  kconfig: qconf: do not use 'menu' variable for (QMenuBar *)
  kconfig: qconf: remove ->addSeparator() to menuBar
  kconfig: add 'static' to some file-local data
  ...

4 years agoigc: Fix PTP initialization
Vinicius Costa Gomes [Mon, 3 Aug 2020 18:32:07 +0000 (11:32 -0700)]
igc: Fix PTP initialization

Right now, igc_ptp_reset() is called from igc_reset(), which is called
from igc_probe() before igc_ptp_init() has a chance to run. It is
detected as an attempt to use an spinlock without registering its key
first. See log below.

To avoid this problem, simplify the initialization: igc_ptp_init() is
only called from igc_probe(), and igc_ptp_reset() is only called from
igc_reset().

[    2.736332] INFO: trying to register non-static key.
[    2.736902] input: HDA Intel PCH Front Headphone as /devices/pci0000:00/0000:00:1f.3/sound/card0/input10
[    2.737513] the code is fine but needs lockdep annotation.
[    2.737513] turning off the locking correctness validator.
[    2.737515] CPU: 8 PID: 239 Comm: systemd-udevd Tainted: G            E     5.8.0-rc7+ #13
[    2.737515] Hardware name: Gigabyte Technology Co., Ltd. Z390 AORUS ULTRA/Z390 AORUS ULTRA-CF, BIOS F7 03/14/2019
[    2.737516] Call Trace:
[    2.737521]  dump_stack+0x78/0xa0
[    2.737524]  register_lock_class+0x6b1/0x6f0
[    2.737526]  ? lockdep_hardirqs_on_prepare+0xca/0x160
[    2.739177]  ? _raw_spin_unlock_irq+0x24/0x50
[    2.739179]  ? trace_hardirqs_on+0x1c/0xf0
[    2.740820]  __lock_acquire+0x56/0x1ff0
[    2.740823]  ? __schedule+0x30c/0x970
[    2.740825]  lock_acquire+0x97/0x3e0
[    2.740830]  ? igc_ptp_reset+0x35/0xf0 [igc]
[    2.740833]  ? schedule_hrtimeout_range_clock+0xb7/0x120
[    2.742507]  _raw_spin_lock_irqsave+0x3a/0x50
[    2.742512]  ? igc_ptp_reset+0x35/0xf0 [igc]
[    2.742515]  igc_ptp_reset+0x35/0xf0 [igc]
[    2.742519]  igc_reset+0x96/0xd0 [igc]
[    2.744148]  igc_probe+0x68f/0x7d0 [igc]
[    2.745796]  local_pci_probe+0x3d/0x70
[    2.745799]  pci_device_probe+0xd1/0x190
[    2.745802]  really_probe+0x15a/0x3f0
[    2.759936]  driver_probe_device+0xe1/0x150
[    2.759937]  device_driver_attach+0xa8/0xb0
[    2.761786]  __driver_attach+0x89/0x150
[    2.761786]  ? device_driver_attach+0xb0/0xb0
[    2.761787]  ? device_driver_attach+0xb0/0xb0
[    2.761788]  bus_for_each_dev+0x66/0x90
[    2.765012]  bus_add_driver+0x12e/0x1f0
[    2.765716]  driver_register+0x8b/0xe0
[    2.766418]  ? 0xffffffffc0230000
[    2.767119]  do_one_initcall+0x5a/0x310
[    2.767826]  ? kmem_cache_alloc_trace+0xe9/0x200
[    2.768528]  do_init_module+0x5c/0x260
[    2.769206]  __do_sys_finit_module+0x93/0xe0
[    2.770048]  do_syscall_64+0x46/0xa0
[    2.770716]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
[    2.771396] RIP: 0033:0x7f83534589e0
[    2.772073] Code: 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 2e 2e 2e 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d 80 24 0d 00 f7 d8 64 89 01 48
[    2.772074] RSP: 002b:00007ffd31d0ed18 EFLAGS: 00000246 ORIG_RAX: 0000000000000139
[    2.774854] RAX: ffffffffffffffda RBX: 000055d52816aba0 RCX: 00007f83534589e0
[    2.774855] RDX: 0000000000000000 RSI: 00007f83535b982f RDI: 0000000000000006
[    2.774855] RBP: 00007ffd31d0ed60 R08: 0000000000000000 R09: 00007ffd31d0ed30
[    2.774856] R10: 0000000000000006 R11: 0000000000000246 R12: 0000000000000000
[    2.774856] R13: 0000000000020000 R14: 00007f83535b982f R15: 000055d527f5e120

Fixes: 5f2958052c58 ("igc: Add basic skeleton for PTP")
Signed-off-by: Vinicius Costa Gomes <vinicius.gomes@intel.com>
Reviewed-by: Andre Guedes <andre.guedes@intel.com>
Tested-by: Aaron Brown <aaron.f.brown@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>
4 years agocan: j1939: transport: j1939_xtp_rx_dat_one(): compare own packets to detect corruptions
Oleksij Rempel [Fri, 7 Aug 2020 10:52:00 +0000 (12:52 +0200)]
can: j1939: transport: j1939_xtp_rx_dat_one(): compare own packets to detect corruptions

Since the stack relays on receiving own packets, it was overwriting own
transmit buffer from received packets.

At least theoretically, the received echo buffer can be corrupt or
changed and the session partner can request to resend previous data. In
this case we will re-send bad data.

With this patch we will stop to overwrite own TX buffer and use it for
sanity checking.

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20200807105200.26441-6-o.rempel@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
4 years agocan: j1939: transport: add j1939_session_skb_find_by_offset() function
Oleksij Rempel [Fri, 7 Aug 2020 10:51:59 +0000 (12:51 +0200)]
can: j1939: transport: add j1939_session_skb_find_by_offset() function

Sometimes it makes no sense to search the skb by pkt.dpo, since we need
next the skb within the transaction block. This may happen if we have an
ETP session with CTS set to less than 255 packets.

After this patch, we will be able to work with ETP sessions where the
block size (ETP.CM_CTS byte 2) is less than 255 packets.

Reported-by: Henrique Figueira <henrislip@gmail.com>
Reported-by: https://github.com/linux-can/can-utils/issues/228
Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20200807105200.26441-5-o.rempel@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
4 years agocan: j1939: socket: j1939_sk_bind(): make sure ml_priv is allocated
Oleksij Rempel [Fri, 7 Aug 2020 10:51:58 +0000 (12:51 +0200)]
can: j1939: socket: j1939_sk_bind(): make sure ml_priv is allocated

This patch adds check to ensure that the struct net_device::ml_priv is
allocated, as it is used later by the j1939 stack.

The allocation is done by all mainline CAN network drivers, but when using
bond or team devices this is not the case.

Bail out if no ml_priv is allocated.

Reported-by: syzbot+f03d384f3455d28833eb@syzkaller.appspotmail.com
Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Cc: linux-stable <stable@vger.kernel.org> # >= v5.4
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20200807105200.26441-4-o.rempel@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
4 years agocan: j1939: transport: j1939_session_tx_dat(): fix use-after-free read in j1939_tp_tx...
Oleksij Rempel [Fri, 7 Aug 2020 10:51:57 +0000 (12:51 +0200)]
can: j1939: transport: j1939_session_tx_dat(): fix use-after-free read in j1939_tp_txtimer()

The current stack implementation do not support ECTS requests of not
aligned TP sized blocks.

If ECTS will request a block with size and offset spanning two TP
blocks, this will cause memcpy() to read beyond the queued skb (which
does only contain one TP sized block).

Sometimes KASAN will detect this read if the memory region beyond the
skb was previously allocated and freed. In other situations it will stay
undetected. The ETP transfer in any case will be corrupted.

This patch adds a sanity check to avoid this kind of read and abort the
session with error J1939_XTP_ABORT_ECTS_TOO_BIG.

Reported-by: syzbot+5322482fe520b02aea30@syzkaller.appspotmail.com
Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Cc: linux-stable <stable@vger.kernel.org> # >= v5.4
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20200807105200.26441-3-o.rempel@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
4 years agocan: j1939: transport: j1939_simple_recv(): ignore local J1939 messages send not...
Oleksij Rempel [Fri, 7 Aug 2020 10:51:56 +0000 (12:51 +0200)]
can: j1939: transport: j1939_simple_recv(): ignore local J1939 messages send not by J1939 stack

In current J1939 stack implementation, we process all locally send
messages as own messages. Even if it was send by CAN_RAW socket.

To reproduce it use following commands:
testj1939 -P -r can0:0x80 &
cansend can0 18238040#0123

This step will trigger false positive not critical warning:
j1939_simple_recv: Received already invalidated message

With this patch we add additional check to make sure, related skb is own
echo message.

Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20200807105200.26441-2-o.rempel@pengutronix.de
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
4 years agocan: j1939: fix kernel-infoleak in j1939_sk_sock2sockaddr_can()
Eric Dumazet [Thu, 13 Aug 2020 16:18:34 +0000 (09:18 -0700)]
can: j1939: fix kernel-infoleak in j1939_sk_sock2sockaddr_can()

syzbot found that at least 2 bytes of kernel information
were leaked during getsockname() on AF_CAN CAN_J1939 socket.

Since struct sockaddr_can has in fact two holes, simply
clear the whole area before filling it with useful data.

BUG: KMSAN: kernel-infoleak in kmsan_copy_to_user+0x81/0x90 mm/kmsan/kmsan_hooks.c:253
CPU: 0 PID: 8466 Comm: syz-executor511 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x21c/0x280 lib/dump_stack.c:118
 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
 kmsan_internal_check_memory+0x238/0x3d0 mm/kmsan/kmsan.c:423
 kmsan_copy_to_user+0x81/0x90 mm/kmsan/kmsan_hooks.c:253
 instrument_copy_to_user include/linux/instrumented.h:91 [inline]
 _copy_to_user+0x18e/0x260 lib/usercopy.c:39
 copy_to_user include/linux/uaccess.h:186 [inline]
 move_addr_to_user+0x3de/0x670 net/socket.c:237
 __sys_getsockname+0x407/0x5e0 net/socket.c:1909
 __do_sys_getsockname net/socket.c:1920 [inline]
 __se_sys_getsockname+0x91/0xb0 net/socket.c:1917
 __x64_sys_getsockname+0x4a/0x70 net/socket.c:1917
 do_syscall_64+0xad/0x160 arch/x86/entry/common.c:386
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x440219
Code: Bad RIP value.
RSP: 002b:00007ffe5ee150c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000033
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 0000000000440219
RDX: 0000000020000240 RSI: 0000000020000100 RDI: 0000000000000003
RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401a20
R13: 0000000000401ab0 R14: 0000000000000000 R15: 0000000000000000

Local variable ----address@__sys_getsockname created at:
 __sys_getsockname+0x91/0x5e0 net/socket.c:1894
 __sys_getsockname+0x91/0x5e0 net/socket.c:1894

Bytes 2-3 of 24 are uninitialized
Memory access of size 24 starts at ffff8880ba2c7de8
Data copied to user address 0000000020000100

Fixes: 9d71dd0c7009 ("can: add support of SAE J1939 protocol")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Reported-by: syzbot <syzkaller@googlegroups.com>
Cc: Robin van der Gracht <robin@protonic.nl>
Cc: Oleksij Rempel <o.rempel@pengutronix.de>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Cc: linux-can@vger.kernel.org
Acked-by: Oleksij Rempel <o.rempel@pengutronix.de>
Link: https://lore.kernel.org/r/20200813161834.4021638-1-edumazet@google.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
4 years agonetfilter: ebtables: reject bogus getopt len value
Florian Westphal [Thu, 13 Aug 2020 07:46:11 +0000 (09:46 +0200)]
netfilter: ebtables: reject bogus getopt len value

syzkaller reports splat:
------------[ cut here ]------------
Buffer overflow detected (80 < 137)!
Call Trace:
 do_ebt_get_ctl+0x2b4/0x790 net/bridge/netfilter/ebtables.c:2317
 nf_getsockopt+0x72/0xd0 net/netfilter/nf_sockopt.c:116
 ip_getsockopt net/ipv4/ip_sockglue.c:1778 [inline]

caused by a copy-to-user with a too-large "*len" value.
This adds a argument check on *len just like in the non-compat version
of the handler.

Before the "Fixes" commit, the reproducer fails with -EINVAL as
expected:
1. core calls the "compat" getsockopt version
2. compat getsockopt version detects the *len value is possibly
   in 64-bit layout (*len != compat_len)
3. compat getsockopt version delegates everything to native getsockopt
   version
4. native getsockopt rejects invalid *len

-> compat handler only sees len == sizeof(compat_struct) for GET_ENTRIES.

After the refactor, event sequence is:
1. getsockopt calls "compat" version (len != native_len)
2. compat version attempts to copy *len bytes, where *len is random
   value from userspace

Fixes: fc66de8e16ec ("netfilter/ebtables: clean up compat {get, set}sockopt handling")
Reported-by: syzbot+5accb5c62faa1d346480@syzkaller.appspotmail.com
Signed-off-by: Florian Westphal <fw@strlen.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
4 years agokconfig: qconf: move setOptionMode() to ConfigList from ConfigView
Masahiro Yamada [Fri, 7 Aug 2020 09:19:09 +0000 (18:19 +0900)]
kconfig: qconf: move setOptionMode() to ConfigList from ConfigView

ConfigView::setOptionMode() only gets access to the 'list' member.

Move it to the more relevant ConfigList class.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: do not limit the pop-up menu to the first row
Masahiro Yamada [Fri, 7 Aug 2020 09:19:08 +0000 (18:19 +0900)]
kconfig: qconf: do not limit the pop-up menu to the first row

If you right-click the first row in the option tree, the pop-up menu
shows up, but if you right-click the second row or below, the event
is ignored due to the following check:

  if (e->y() <= header()->geometry().bottom()) {

Perhaps, the intention was to show the pop-menu only when the tree
header was right-clicked, but this handler is not called in that case.

Since the origin of e->y() starts from the bottom of the header,
this check is odd.

Going forward, you can right-click anywhere in the tree to get the
pop-up menu.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: refactor icon setups
Masahiro Yamada [Fri, 7 Aug 2020 09:19:07 +0000 (18:19 +0900)]
kconfig: qconf: refactor icon setups

These icon data are used by ConfigItem, but stored in each instance
of ConfigView. There is no point to keep the same data in each of 3
instances, "menu", "config", and "search".

Move the icon data to the more relevant ConfigItem class, and make
them static members.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: remove unused voidPix, menuInvPix
Masahiro Yamada [Fri, 7 Aug 2020 09:19:06 +0000 (18:19 +0900)]
kconfig: qconf: remove unused voidPix, menuInvPix

These are initialized, but not used by anyone.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: remove ConfigItem::text/setText
Masahiro Yamada [Fri, 7 Aug 2020 09:19:05 +0000 (18:19 +0900)]
kconfig: qconf: remove ConfigItem::text/setText

Use QTreeWidgetItem::text/setText directly

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: remove ConfigList::addColumn/removeColumn
Masahiro Yamada [Fri, 7 Aug 2020 09:19:04 +0000 (18:19 +0900)]
kconfig: qconf: remove ConfigList::addColumn/removeColumn

Use QTreeView::showColumn/hideColumn directly.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: remove ConfigItem::pixmap/setPixmap
Masahiro Yamada [Fri, 7 Aug 2020 09:19:03 +0000 (18:19 +0900)]
kconfig: qconf: remove ConfigItem::pixmap/setPixmap

Use QTreeWidgetItem::icon/setIcon directly.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: drop more localization code
Masahiro Yamada [Fri, 7 Aug 2020 09:19:02 +0000 (18:19 +0900)]
kconfig: qconf: drop more localization code

This is a remnant of commit 694c49a7c01c ("kconfig: drop localization
support").

Get it back to the code prior to commit 3b9fa0931dd8 ("[PATCH] Kconfig
i18n support").

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: remove 'parent' from ConfigList::updateMenuList()
Masahiro Yamada [Fri, 7 Aug 2020 09:19:01 +0000 (18:19 +0900)]
kconfig: qconf: remove 'parent' from ConfigList::updateMenuList()

All the call-sites of this function pass 'this' to the first argument.

So, 'parent' is always the 'this' pointer.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: remove unused argument from ConfigView::updateList()
Masahiro Yamada [Fri, 7 Aug 2020 09:19:00 +0000 (18:19 +0900)]
kconfig: qconf: remove unused argument from ConfigView::updateList()

Now that ConfigList::updateList() takes no argument, the 'item' argument
ConfigView::updateList() is no longer used.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: remove unused argument from ConfigList::updateList()
Masahiro Yamada [Fri, 7 Aug 2020 09:18:59 +0000 (18:18 +0900)]
kconfig: qconf: remove unused argument from ConfigList::updateList()

This function allocates 'item' before using it, so the argument 'item'
is always shadowed.

Remove the meaningless argument.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: omit parent to QHBoxLayout()
Masahiro Yamada [Fri, 7 Aug 2020 09:18:58 +0000 (18:18 +0900)]
kconfig: qconf: omit parent to QHBoxLayout()

Instead of passing 0 (i.e. nullptr), leave it empty.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: remove name from ConfigSearchWindow constructor
Masahiro Yamada [Fri, 7 Aug 2020 09:18:57 +0000 (18:18 +0900)]
kconfig: qconf: remove name from ConfigSearchWindow constructor

This constructor is only called with "search" as the second argument.

Hard-code the name in the constructor, and drop it from the function
argument.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: remove unused ConfigList::listView()
Masahiro Yamada [Fri, 7 Aug 2020 09:18:56 +0000 (18:18 +0900)]
kconfig: qconf: remove unused ConfigList::listView()

I do not know how this function can be useful. In fact, it is unsed.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: overload addToolBar() to create and insert toolbar
Masahiro Yamada [Fri, 7 Aug 2020 09:18:55 +0000 (18:18 +0900)]
kconfig: qconf: overload addToolBar() to create and insert toolbar

Use the overloaded function, addToolBar(const QString &title)
to create a QToolBar object, setting its window title, and inserts
it into the toolbar area.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: remove toolBar from ConfigMainWindow members
Masahiro Yamada [Fri, 7 Aug 2020 09:18:54 +0000 (18:18 +0900)]
kconfig: qconf: remove toolBar from ConfigMainWindow members

This pointer is only used in the ConfigMainWindow constructor.

Drop it from the private members.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: use 'menu' variable for (QMenu *)
Masahiro Yamada [Fri, 7 Aug 2020 09:18:53 +0000 (18:18 +0900)]
kconfig: qconf: use 'menu' variable for (QMenu *)

The variable 'config' for the file menu is inconsistent.

You do not need to use different variables. Use 'menu' for every menu.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: do not use 'menu' variable for (QMenuBar *)
Masahiro Yamada [Fri, 7 Aug 2020 09:18:52 +0000 (18:18 +0900)]
kconfig: qconf: do not use 'menu' variable for (QMenuBar *)

I think it is a bit confusing to use 'menu' to hold a QMenuBar pointer.
I want to use 'menu' for a QMenu pointer.

You do not need to use a local variable here. Use menuBar() directly.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: remove ->addSeparator() to menuBar
Masahiro Yamada [Fri, 7 Aug 2020 09:18:51 +0000 (18:18 +0900)]
kconfig: qconf: remove ->addSeparator() to menuBar

I do not understand the purpose of this ->addSeparator().
It does not make any difference.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: add 'static' to some file-local data
Masahiro Yamada [Wed, 29 Jul 2020 03:18:37 +0000 (12:18 +0900)]
kconfig: add 'static' to some file-local data

Fix some warnings from sparce like follows:

  warning: symbol '...' was not declared. Should it be static?

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: qconf: Fix mouse events in search view
Maxime Chretien [Wed, 8 Jul 2020 13:32:15 +0000 (15:32 +0200)]
kconfig: qconf: Fix mouse events in search view

On menu properties mouse events didn't do anything in search view
(listMode).

As there are no menus in listMode we can add an exception in tests to
always change the value on mouse events if we are in listMode.

Signed-off-by: Maxime Chretien <maxime.chretien@bootlin.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: constify XPM data
Masahiro Yamada [Sat, 18 Jul 2020 06:38:47 +0000 (15:38 +0900)]
kconfig: constify XPM data

Constify arrays as well as strings.

Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agoRevert "checkpatch: kconfig: prefer 'help' over '---help---'"
Masahiro Yamada [Wed, 17 Jun 2020 03:02:20 +0000 (12:02 +0900)]
Revert "checkpatch: kconfig: prefer 'help' over '---help---'"

This reverts commit 84af7a6194e493fae312a2b7fa5a3b51f76d9282.

The conversion is done.

Cc: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agokconfig: remove '---help---' support
Masahiro Yamada [Wed, 17 Jun 2020 03:02:19 +0000 (12:02 +0900)]
kconfig: remove '---help---' support

The conversion is done. No more user of '---help---'.

Cc: Ulf Magnusson <ulfalizer@gmail.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
4 years agoMerge git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net
Linus Torvalds [Fri, 14 Aug 2020 03:03:11 +0000 (20:03 -0700)]
Merge git://git./linux/kernel/git/netdev/net

Pull networking fixes from David Miller:
 "Some merge window fallout, some longer term fixes:

   1) Handle headroom properly in lapbether and x25_asy drivers, from
      Xie He.

   2) Fetch MAC address from correct r8152 device node, from Thierry
      Reding.

   3) In the sw kTLS path we should allow MSG_CMSG_COMPAT in sendmsg,
      from Rouven Czerwinski.

   4) Correct fdputs in socket layer, from Miaohe Lin.

   5) Revert troublesome sockptr_t optimization, from Christoph Hellwig.

   6) Fix TCP TFO key reading on big endian, from Jason Baron.

   7) Missing CAP_NET_RAW check in nfc, from Qingyu Li.

   8) Fix inet fastreuse optimization with tproxy sockets, from Tim
      Froidcoeur.

   9) Fix 64-bit divide in new SFC driver, from Edward Cree.

  10) Add a tracepoint for prandom_u32 so that we can more easily
      perform usage analysis. From Eric Dumazet.

  11) Fix rwlock imbalance in AF_PACKET, from John Ogness"

* git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net: (49 commits)
  net: openvswitch: introduce common code for flushing flows
  af_packet: TPACKET_V3: fix fill status rwlock imbalance
  random32: add a tracepoint for prandom_u32()
  Revert "ipv4: tunnel: fix compilation on ARCH=um"
  net: accept an empty mask in /sys/class/net/*/queues/rx-*/rps_cpus
  net: ethernet: stmmac: Disable hardware multicast filter
  net: stmmac: dwmac1000: provide multicast filter fallback
  ipv4: tunnel: fix compilation on ARCH=um
  vsock: fix potential null pointer dereference in vsock_poll()
  sfc: fix ef100 design-param checking
  net: initialize fastreuse on inet_inherit_port
  net: refactor bind_bucket fastreuse into helper
  net: phy: marvell10g: fix null pointer dereference
  net: Fix potential memory leak in proto_register()
  net: qcom/emac: add missed clk_disable_unprepare in error path of emac_clks_phase1_init
  ionic_lif: Use devm_kcalloc() in ionic_qcq_alloc()
  net/nfc/rawsock.c: add CAP_NET_RAW check.
  hinic: fix strncpy output truncated compile warnings
  drivers/net/wan/x25_asy: Added needed_headroom and a skb->len check
  net/tls: Fix kmap usage
  ...

4 years agoMerge branch 'i2c/for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux
Linus Torvalds [Fri, 14 Aug 2020 01:41:00 +0000 (18:41 -0700)]
Merge branch 'i2c/for-5.9' of git://git./linux/kernel/git/wsa/linux

Pull i2c updates from Wolfram Sang:

 - bus recovery can now be given a pinctrl handle and the I2C core will
   do all the steps to switch to/from GPIO which can save quite some
   boilerplate code from drivers

 - "fallthrough" conversion

 - driver updates, mostly ID additions

* 'i2c/for-5.9' of git://git.kernel.org/pub/scm/linux/kernel/git/wsa/linux: (32 commits)
  i2c: iproc: fix race between client unreg and isr
  i2c: eg20t: use generic power management
  i2c: eg20t: Drop PCI wakeup calls from .suspend/.resume
  i2c: mediatek: Fix i2c_spec_values description
  i2c: mediatek: Add i2c compatible for MediaTek MT8192
  dt-bindings: i2c: update bindings for MT8192 SoC
  i2c: mediatek: Add access to more than 8GB dram in i2c driver
  i2c: mediatek: Add apdma sync in i2c driver
  i2c: i801: Add support for Intel Tiger Lake PCH-H
  i2c: i801: Add support for Intel Emmitsburg PCH
  i2c: bcm2835: Replace HTTP links with HTTPS ones
  Documentation: i2c: dev: 'block process call' is supported
  i2c: at91: Move to generic GPIO bus recovery
  i2c: core: treat EPROBE_DEFER when acquiring SCL/SDA GPIOs
  i2c: core: add generic I2C GPIO recovery
  dt-bindings: i2c: add generic properties for GPIO bus recovery
  i2c: rcar: avoid race when unregistering slave
  i2c: tegra: Avoid tegra_i2c_init_dma() for Tegra210 vi i2c
  i2c: tegra: Fix runtime resume to re-init VI I2C
  i2c: tegra: Fix the error path in tegra_i2c_runtime_resume
  ...

4 years agoselftests/bpf: Make test_varlen work with 32-bit user-space arch
Andrii Nakryiko [Thu, 13 Aug 2020 20:49:45 +0000 (13:49 -0700)]
selftests/bpf: Make test_varlen work with 32-bit user-space arch

Despite bpftool generating data section memory layout that will work for
32-bit architectures on user-space side, BPF programs should be careful to not
use ambiguous types like `long`, which have different size in 32-bit and
64-bit environments. Fix that in test by using __u64 explicitly, which is
a recommended approach anyway.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200813204945.1020225-10-andriin@fb.com
4 years agotools/bpftool: Generate data section struct with conservative alignment
Andrii Nakryiko [Thu, 13 Aug 2020 20:49:44 +0000 (13:49 -0700)]
tools/bpftool: Generate data section struct with conservative alignment

The comment in the code describes this in good details. Generate such a memory
layout that would work both on 32-bit and 64-bit architectures for user-space.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200813204945.1020225-9-andriin@fb.com
4 years agoselftests/bpf: Correct various core_reloc 64-bit assumptions
Andrii Nakryiko [Thu, 13 Aug 2020 20:49:43 +0000 (13:49 -0700)]
selftests/bpf: Correct various core_reloc 64-bit assumptions

Ensure that types are memory layout- and field alignment-compatible regardless
of 32/64-bitness mix of libbpf and BPF architecture.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200813204945.1020225-8-andriin@fb.com
4 years agolibbpf: Enforce 64-bitness of BTF for BPF object files
Andrii Nakryiko [Thu, 13 Aug 2020 20:49:42 +0000 (13:49 -0700)]
libbpf: Enforce 64-bitness of BTF for BPF object files

BPF object files are always targeting 64-bit BPF target architecture, so
enforce that at BTF level as well.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200813204945.1020225-7-andriin@fb.com
4 years agoselftests/bpf: Fix btf_dump test cases on 32-bit arches
Andrii Nakryiko [Thu, 13 Aug 2020 20:49:41 +0000 (13:49 -0700)]
selftests/bpf: Fix btf_dump test cases on 32-bit arches

Fix btf_dump test cases by hard-coding BPF's pointer size of 8 bytes for cases
where it's impossible to deterimne the pointer size (no long type in BTF). In
cases where it's known, validate libbpf correctly determines it as 8.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200813204945.1020225-6-andriin@fb.com
4 years agolibbpf: Handle BTF pointer sizes more carefully
Andrii Nakryiko [Thu, 13 Aug 2020 20:49:40 +0000 (13:49 -0700)]
libbpf: Handle BTF pointer sizes more carefully

With libbpf and BTF it is pretty common to have libbpf built for one
architecture, while BTF information was generated for a different architecture
(typically, but not always, BPF). In such case, the size of a pointer might
differ betweem architectures. libbpf previously was always making an
assumption that pointer size for BTF is the same as native architecture
pointer size, but that breaks for cases where libbpf is built as 32-bit
library, while BTF is for 64-bit architecture.

To solve this, add heuristic to determine pointer size by searching for `long`
or `unsigned long` integer type and using its size as a pointer size. Also,
allow to override the pointer size with a new API btf__set_pointer_size(), for
cases where application knows which pointer size should be used. User
application can check what libbpf "guessed" by looking at the result of
btf__pointer_size(). If it's not 0, then libbpf successfully determined a
pointer size, otherwise native arch pointer size will be used.

For cases where BTF is parsed from ELF file, use ELF's class (32-bit or
64-bit) to determine pointer size.

Fixes: 8a138aed4a80 ("bpf: btf: Add BTF support to libbpf")
Fixes: 351131b51c7a ("libbpf: add btf_dump API for BTF-to-C conversion")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200813204945.1020225-5-andriin@fb.com
4 years agolibbpf: Fix BTF-defined map-in-map initialization on 32-bit host arches
Andrii Nakryiko [Thu, 13 Aug 2020 20:49:39 +0000 (13:49 -0700)]
libbpf: Fix BTF-defined map-in-map initialization on 32-bit host arches

Libbpf built in 32-bit mode should be careful about not conflating 64-bit BPF
pointers in BPF ELF file and host architecture pointers. This patch fixes
issue of incorrect initializating of map-in-map inner map slots due to such
difference.

Fixes: 646f02ffdd49 ("libbpf: Add BTF-defined map-in-map support")
Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200813204945.1020225-4-andriin@fb.com
4 years agoselftest/bpf: Fix compilation warnings in 32-bit mode
Andrii Nakryiko [Thu, 13 Aug 2020 20:49:38 +0000 (13:49 -0700)]
selftest/bpf: Fix compilation warnings in 32-bit mode

Fix compilation warnings emitted when compiling selftests for 32-bit platform
(x86 in my case).

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200813204945.1020225-3-andriin@fb.com
4 years agotools/bpftool: Fix compilation warnings in 32-bit mode
Andrii Nakryiko [Thu, 13 Aug 2020 20:49:37 +0000 (13:49 -0700)]
tools/bpftool: Fix compilation warnings in 32-bit mode

Fix few compilation warnings in bpftool when compiling in 32-bit mode.
Abstract away u64 to pointer conversion into a helper function.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200813204945.1020225-2-andriin@fb.com
4 years agonet: openvswitch: introduce common code for flushing flows
Tonghao Zhang [Wed, 12 Aug 2020 09:56:39 +0000 (17:56 +0800)]
net: openvswitch: introduce common code for flushing flows

To avoid some issues, for example RCU usage warning and double free,
we should flush the flows under ovs_lock. This patch refactors
table_instance_destroy and introduces table_instance_flow_flush
which can be invoked by __dp_destroy or ovs_flow_tbl_flush.

Fixes: 50b0e61b32ee ("net: openvswitch: fix possible memleak on destroy flow-table")
Reported-by: Johan Knöös <jknoos@google.com>
Reported-at: https://mail.openvswitch.org/pipermail/ovs-discuss/2020-August/050489.html
Signed-off-by: Tonghao Zhang <xiangxia.m.yue@gmail.com>
Reviewed-by: Cong Wang <xiyou.wangcong@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoaf_packet: TPACKET_V3: fix fill status rwlock imbalance
John Ogness [Thu, 13 Aug 2020 19:39:25 +0000 (21:45 +0206)]
af_packet: TPACKET_V3: fix fill status rwlock imbalance

After @blk_fill_in_prog_lock is acquired there is an early out vnet
situation that can occur. In that case, the rwlock needs to be
released.

Also, since @blk_fill_in_prog_lock is only acquired when @tp_version
is exactly TPACKET_V3, only release it on that exact condition as
well.

And finally, add sparse annotation so that it is clearer that
prb_fill_curr_block() and prb_clear_blk_fill_status() are acquiring
and releasing @blk_fill_in_prog_lock, respectively. sparse is still
unable to understand the balance, but the warnings are now on a
higher level that make more sense.

Fixes: 632ca50f2cbd ("af_packet: TPACKET_V3: replace busy-wait loop")
Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agorandom32: add a tracepoint for prandom_u32()
Eric Dumazet [Thu, 13 Aug 2020 17:06:43 +0000 (10:06 -0700)]
random32: add a tracepoint for prandom_u32()

There has been some heat around prandom_u32() lately, and some people
were wondering if there was a simple way to determine how often
it was used, before considering making it maybe 10 times more expensive.

This tracepoint exports the generated pseudo random value.

Tested:

perf list | grep prandom_u32
  random:prandom_u32                                 [Tracepoint event]

perf record -a [-g] [-C1] -e random:prandom_u32 sleep 1
[ perf record: Woken up 0 times to write data ]
[ perf record: Captured and wrote 259.748 MB perf.data (924087 samples) ]

perf report --nochildren
    ...
    97.67%  ksoftirqd/1     [kernel.vmlinux]  [k] prandom_u32
            |
            ---prandom_u32
               prandom_u32
               |
               |--48.86%--tcp_v4_syn_recv_sock
               |          tcp_check_req
               |          tcp_v4_rcv
               |          ...
                --48.81%--tcp_conn_request
                          tcp_v4_conn_request
                          tcp_rcv_state_process
                          ...
perf script

Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Willy Tarreau <w@1wt.eu>
Cc: Sedat Dilek <sedat.dilek@gmail.com>
Tested-by: Sedat Dilek <sedat.dilek@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
4 years agoMerge tag 'docs-5.9-2' of git://git.lwn.net/linux
Linus Torvalds [Thu, 13 Aug 2020 20:57:45 +0000 (13:57 -0700)]
Merge tag 'docs-5.9-2' of git://git.lwn.net/linux

Pull documentation fixes from Jonathan Corbet:
 "A handful of obvious fixes that wandered in during the merge window"

* tag 'docs-5.9-2' of git://git.lwn.net/linux:
  Documentation/locking/locktypes: fix the typo
  doc/zh_CN: resolve undefined label warning in admin-guide index
  doc/zh_CN: fix title heading markup in admin-guide cpu-load
  docs: remove the 2.6 "Upgrading I2C Drivers" guide
  docs: Correct the release date of 5.2 stable
  mailmap: Update comments for with format and more detalis
  docs: cdrom: Fix a typo and rst markup
  Doc: admin-guide: use correct legends in kernel-parameters.txt
  Documentation/features: refresh RISC-V arch support files
  documentation: coccinelle: Improve command example for make C={1,2}
  Core-api: Documentation: Replace deprecated :c:func: Usage
  Dev-tools: Documentation: Replace deprecated :c:func: Usage
  Filesystems: Documentation: Replace deprecated :c:func: Usage
  docs: trace: fix a typo

4 years agodoc: Add link to bpf helpers man page
Joe Stringer [Thu, 13 Aug 2020 18:08:07 +0000 (11:08 -0700)]
doc: Add link to bpf helpers man page

The bpf-helpers(7) man pages provide an invaluable description of the
functions that an eBPF program can call at runtime. Link them here.

Signed-off-by: Joe Stringer <joe@wand.net.nz>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200813180807.2821735-1-joe@wand.net.nz
4 years agoDocumentation/locking/locktypes: fix the typo
Huang Shijie [Thu, 13 Aug 2020 06:02:20 +0000 (14:02 +0800)]
Documentation/locking/locktypes: fix the typo

We have three categories locks, not two.

Signed-off-by: Huang Shijie <sjhuang@iluvatar.ai>
Acked-by: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20200813060220.18199-1-sjhuang@iluvatar.ai
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
4 years agobpf, selftests: Add tests to sock_ops for loading sk
John Fastabend [Tue, 11 Aug 2020 22:05:53 +0000 (15:05 -0700)]
bpf, selftests: Add tests to sock_ops for loading sk

Add tests to directly accesse sock_ops sk field. Then use it to
ensure a bad pointer access will fault if something goes wrong.
We do three tests:

The first test ensures when we read sock_ops sk pointer into the
same register that we don't fault as described earlier. Here r9
is chosen as the temp register.  The xlated code is,

  36: (7b) *(u64 *)(r1 +32) = r9
  37: (61) r9 = *(u32 *)(r1 +28)
  38: (15) if r9 == 0x0 goto pc+3
  39: (79) r9 = *(u64 *)(r1 +32)
  40: (79) r1 = *(u64 *)(r1 +0)
  41: (05) goto pc+1
  42: (79) r9 = *(u64 *)(r1 +32)

The second test ensures the temp register selection does not collide
with in-use register r9. Shown here r8 is chosen because r9 is the
sock_ops pointer. The xlated code is as follows,

  46: (7b) *(u64 *)(r9 +32) = r8
  47: (61) r8 = *(u32 *)(r9 +28)
  48: (15) if r8 == 0x0 goto pc+3
  49: (79) r8 = *(u64 *)(r9 +32)
  50: (79) r9 = *(u64 *)(r9 +0)
  51: (05) goto pc+1
  52: (79) r8 = *(u64 *)(r9 +32)

And finally, ensure we didn't break the base case where dst_reg does
not equal the source register,

  56: (61) r2 = *(u32 *)(r1 +28)
  57: (15) if r2 == 0x0 goto pc+1
  58: (79) r2 = *(u64 *)(r1 +0)

Notice it takes us an extra four instructions when src reg is the
same as dst reg. One to save the reg, two to restore depending on
the branch taken and a goto to jump over the second restore.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/159718355325.4728.4163036953345999636.stgit@john-Precision-5820-Tower
4 years agobpf, selftests: Add tests for sock_ops load with r9, r8.r7 registers
John Fastabend [Tue, 11 Aug 2020 22:05:33 +0000 (15:05 -0700)]
bpf, selftests: Add tests for sock_ops load with r9, r8.r7 registers

Loads in sock_ops case when using high registers requires extra logic to
ensure the correct temporary value is used. We need to ensure the temp
register does not use either the src_reg or dst_reg. Lets add an asm
test to force the logic is triggered.

The xlated code is here,

  30: (7b) *(u64 *)(r9 +32) = r7
  31: (61) r7 = *(u32 *)(r9 +28)
  32: (15) if r7 == 0x0 goto pc+2
  33: (79) r7 = *(u64 *)(r9 +0)
  34: (63) *(u32 *)(r7 +916) = r8
  35: (79) r7 = *(u64 *)(r9 +32)

Notice r9 and r8 are not used for temp registers and r7 is chosen.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/159718353345.4728.8805043614257933227.stgit@john-Precision-5820-Tower
4 years agobpf, selftests: Add tests for ctx access in sock_ops with single register
John Fastabend [Tue, 11 Aug 2020 22:05:14 +0000 (15:05 -0700)]
bpf, selftests: Add tests for ctx access in sock_ops with single register

To verify fix ("bpf: sock_ops ctx access may stomp registers in corner case")
we want to force compiler to generate the following code when accessing a
field with BPF_TCP_SOCK_GET_COMMON,

     r1 = *(u32 *)(r1 + 96) // r1 is skops ptr

Rather than depend on clang to do this we add the test with inline asm to
the tcpbpf test. This saves us from having to create another runner and
ensures that if we break this again test_tcpbpf will crash.

With above code we get the xlated code,

  11: (7b) *(u64 *)(r1 +32) = r9
  12: (61) r9 = *(u32 *)(r1 +28)
  13: (15) if r9 == 0x0 goto pc+4
  14: (79) r9 = *(u64 *)(r1 +32)
  15: (79) r1 = *(u64 *)(r1 +0)
  16: (61) r1 = *(u32 *)(r1 +2348)
  17: (05) goto pc+1
  18: (79) r9 = *(u64 *)(r1 +32)

We also add the normal case where src_reg != dst_reg so we can compare
code generation easily from llvm-objdump and ensure that case continues
to work correctly. The normal code is xlated to,

  20: (b7) r1 = 0
  21: (61) r1 = *(u32 *)(r3 +28)
  22: (15) if r1 == 0x0 goto pc+2
  23: (79) r1 = *(u64 *)(r3 +0)
  24: (61) r1 = *(u32 *)(r1 +2348)

Where the temp variable is not used.

Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/159718351457.4728.3295119261717842496.stgit@john-Precision-5820-Tower
4 years agobpf: sock_ops sk access may stomp registers when dst_reg = src_reg
John Fastabend [Tue, 11 Aug 2020 22:04:56 +0000 (15:04 -0700)]
bpf: sock_ops sk access may stomp registers when dst_reg = src_reg

Similar to patch ("bpf: sock_ops ctx access may stomp registers") if the
src_reg = dst_reg when reading the sk field of a sock_ops struct we
generate xlated code,

  53: (61) r9 = *(u32 *)(r9 +28)
  54: (15) if r9 == 0x0 goto pc+3
  56: (79) r9 = *(u64 *)(r9 +0)

This stomps on the r9 reg to do the sk_fullsock check and then when
reading the skops->sk field instead of the sk pointer we get the
sk_fullsock. To fix use similar pattern noted in the previous fix
and use the temp field to save/restore a register used to do
sk_fullsock check.

After the fix the generated xlated code reads,

  52: (7b) *(u64 *)(r9 +32) = r8
  53: (61) r8 = *(u32 *)(r9 +28)
  54: (15) if r9 == 0x0 goto pc+3
  55: (79) r8 = *(u64 *)(r9 +32)
  56: (79) r9 = *(u64 *)(r9 +0)
  57: (05) goto pc+1
  58: (79) r8 = *(u64 *)(r9 +32)

Here r9 register was in-use so r8 is chosen as the temporary register.
In line 52 r8 is saved in temp variable and at line 54 restored in case
fullsock != 0. Finally we handle fullsock == 0 case by restoring at
line 58.

This adds a new macro SOCK_OPS_GET_SK it is almost possible to merge
this with SOCK_OPS_GET_FIELD, but I found the extra branch logic a
bit more confusing than just adding a new macro despite a bit of
duplicating code.

Fixes: 1314ef561102e ("bpf: export bpf_sock for BPF_PROG_TYPE_SOCK_OPS prog type")
Signed-off-by: John Fastabend <john.fastabend@gmail.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/159718349653.4728.6559437186853473612.stgit@john-Precision-5820-Tower