Andrew Rybchenko [Sat, 16 Nov 2013 07:02:27 +0000 (11:02 +0400)]
sfc: RX buffer allocation takes prefix size into account in IP header alignment
[ Upstream commit
2ec030144f648a6dd208f95f55ece212f1b72771 ]
rx_prefix_size is 4-bytes aligned on Falcon/Siena (16 bytes), but it is equal
to 14 on EF10. So, it should be taken into account if arch requires IP header
to be 4-bytes aligned (via NET_IP_ALIGN).
Fixes:
8127d661e77f ('sfc: Add support for Solarflare SFC9100 family')
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Hutchings [Thu, 5 Dec 2013 17:24:06 +0000 (17:24 +0000)]
sfc: Maintain current frequency adjustment when applying a time offset
[ Upstream commit
cd6fe65e923175e4f2e9fb585b1d78c6bf580fc6 ]
There is a single MCDI PTP operation for setting the frequency
adjustment and applying a time offset to the hardware clock. When
applying a time offset we should not change the frequency adjustment.
These two operations can now be requested separately but this requires
a flash firmware update. Keep using the single operation, but
remember and repeat the previous frequency adjustment.
Fixes:
7c236c43b838 ('sfc: Add support for IEEE-1588 PTP')
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Alexandre Rames [Fri, 8 Nov 2013 10:20:31 +0000 (10:20 +0000)]
sfc: Stop/re-start PTP when stopping/starting the datapath.
[ Upstream commit
2ea4dc28a5bcec408e01a8772763871638a5ec79 ]
This disables PTP when we bring the interface down to avoid getting
unmatched RX timestamp events, and tries to re-enable it when bringing
the interface up.
[bwh: Make efx_ptp_stop() safe on Falcon. Introduce
efx_ptp_{start,stop}_datapath() functions; we'll expand them later.]
Fixes:
7c236c43b838 ('sfc: Add support for IEEE-1588 PTP')
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Hutchings [Fri, 6 Dec 2013 22:10:46 +0000 (22:10 +0000)]
sfc: Rate-limit log message for PTP packets without a matching timestamp event
[ Upstream commit
35f9a7a380728a94d417e5824a866f969423ac83 ]
In case of a flood of PTP packets, the timestamp peripheral and MC
firmware on the SFN[56]322F boards may not be able to provide
timestamp events for all packets. Don't complain too much about this.
Fixes:
7c236c43b838 ('sfc: Add support for IEEE-1588 PTP')
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Laurence Evans [Mon, 28 Jan 2013 14:51:17 +0000 (14:51 +0000)]
sfc: PTP: Moderate log message on event queue overflow
[ Upstream commit
f32116003c39f3a6815215a7512e1ea8d1e4bbc7 ]
Limit syslog flood if a PTP packet storm occurs.
Fixes:
7c236c43b838 ('sfc: Add support for IEEE-1588 PTP')
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Ben Hutchings [Fri, 6 Dec 2013 19:26:40 +0000 (19:26 +0000)]
sfc: Add length checks to efx_xmit_with_hwtstamp() and efx_ptp_is_ptp_tx()
[ Upstream commit
e5a498e943fbc497f236ab8cf31366c75f337ce6 ]
efx_ptp_is_ptp_tx() must be robust against skbs from raw sockets that
have invalid IPv4 and UDP headers.
Add checks that:
- the transport header has been found
- there is enough space between network and transport header offset
for an IPv4 header
- there is enough space after the transport header offset for a
UDP header
Fixes:
7c236c43b838 ('sfc: Add support for IEEE-1588 PTP')
Signed-off-by: Ben Hutchings <bhutchings@solarflare.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Curt Brune [Mon, 6 Jan 2014 19:00:32 +0000 (11:00 -0800)]
bridge: use spin_lock_bh() in br_multicast_set_hash_max
[ Upstream commit
fe0d692bbc645786bce1a98439e548ae619269f5 ]
br_multicast_set_hash_max() is called from process context in
net/bridge/br_sysfs_br.c by the sysfs store_hash_max() function.
br_multicast_set_hash_max() calls spin_lock(&br->multicast_lock),
which can deadlock the CPU if a softirq that also tries to take the
same lock interrupts br_multicast_set_hash_max() while the lock is
held . This can happen quite easily when any of the bridge multicast
timers expire, which try to take the same lock.
The fix here is to use spin_lock_bh(), preventing other softirqs from
executing on this CPU.
Steps to reproduce:
1. Create a bridge with several interfaces (I used 4).
2. Set the "multicast query interval" to a low number, like 2.
3. Enable the bridge as a multicast querier.
4. Repeatedly set the bridge hash_max parameter via sysfs.
# brctl addbr br0
# brctl addif br0 eth1 eth2 eth3 eth4
# brctl setmcqi br0 2
# brctl setmcquerier br0 1
# while true ; do echo 4096 > /sys/class/net/br0/bridge/hash_max; done
Signed-off-by: Curt Brune <curt@cumulusnetworks.com>
Signed-off-by: Scott Feldman <sfeldma@cumulusnetworks.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David S. Miller [Fri, 3 Jan 2014 00:50:52 +0000 (19:50 -0500)]
netpoll: Fix missing TXQ unlock and and OOPS.
[ Upstream commit
aca5f58f9ba803ec8c2e6bcf890db17589e8dfcc ]
The VLAN tag handling code in netpoll_send_skb_on_dev() has two problems.
1) It exits without unlocking the TXQ.
2) It then tries to queue a NULL skb to npinfo->txq.
Reported-by: Ahmed Tamrawi <atamrawi@iastate.edu>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Daniel Borkmann [Mon, 30 Dec 2013 22:40:50 +0000 (23:40 +0100)]
net: llc: fix use after free in llc_ui_recvmsg
[ Upstream commit
4d231b76eef6c4a6bd9c96769e191517765942cb ]
While commit
30a584d944fb fixes datagram interface in LLC, a use
after free bug has been introduced for SOCK_STREAM sockets that do
not make use of MSG_PEEK.
The flow is as follow ...
if (!(flags & MSG_PEEK)) {
...
sk_eat_skb(sk, skb, false);
...
}
...
if (used + offset < skb->len)
continue;
... where sk_eat_skb() calls __kfree_skb(). Therefore, cache
original length and work on skb_len to check partial reads.
Fixes:
30a584d944fb ("[LLX]: SOCK_DGRAM interface fixes")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Cc: Stephen Hemminger <stephen@networkplumber.org>
Cc: Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jason Wang [Mon, 30 Dec 2013 03:34:40 +0000 (11:34 +0800)]
virtio-net: fix refill races during restore
[ Upstream commit
6cd4ce0099da7702f885b6fa9ebb49e3831d90b4 ]
During restoring, try_fill_recv() was called with neither napi lock nor napi
disabled. This can lead two try_fill_recv() was called in the same time. Fix
this by refilling before trying to enable napi.
Fixes
0741bcb5584f9e2390ae6261573c4de8314999f2
(virtio: net: Add freeze, restore handlers to support S4).
Cc: Amit Shah <amit.shah@redhat.com>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Eric Dumazet <eric.dumazet@gmail.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Wei-Chun Chao [Thu, 26 Dec 2013 21:10:22 +0000 (13:10 -0800)]
ipv4: fix tunneled VM traffic over hw VXLAN/GRE GSO NIC
[ Upstream commit
7a7ffbabf99445704be01bff5d7e360da908cf8e ]
VM to VM GSO traffic is broken if it goes through VXLAN or GRE
tunnel and the physical NIC on the host supports hardware VXLAN/GRE
GSO offload (e.g. bnx2x and next-gen mlx4).
Two issues -
(VXLAN) VM traffic has SKB_GSO_DODGY and SKB_GSO_UDP_TUNNEL with
SKB_GSO_TCP/UDP set depending on the inner protocol. GSO header
integrity check fails in udp4_ufo_fragment if inner protocol is
TCP. Also gso_segs is calculated incorrectly using skb->len that
includes tunnel header. Fix: robust check should only be applied
to the inner packet.
(VXLAN & GRE) Once GSO header integrity check passes, NULL segs
is returned and the original skb is sent to hardware. However the
tunnel header is already pulled. Fix: tunnel header needs to be
restored so that hardware can perform GSO properly on the original
packet.
Signed-off-by: Wei-Chun Chao <weichunc@plumgrid.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michael S. Tsirkin [Thu, 26 Dec 2013 13:32:55 +0000 (15:32 +0200)]
virtio_net: don't leak memory or block when too many frags
We leak an skb when there are too many frags,
we also stop processing the packet in the middle,
the result is almost sure to be loss of networking.
Reported-by: Michael Dalton <mwdalton@google.com>
Acked-by: Michael Dalton <mwdalton@google.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michael S. Tsirkin [Thu, 26 Dec 2013 13:32:51 +0000 (15:32 +0200)]
virtio-net: make all RX paths handle errors consistently
receive mergeable now handles errors internally.
Do same for big and small packet paths, otherwise
the logic is too hard to follow.
Cc: Jason Wang <jasowang@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Acked-by: Michael Dalton <mwdalton@google.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit
f121159d72091f25afb22007c833e60a6845e912)
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Michael S. Tsirkin [Thu, 26 Dec 2013 13:32:47 +0000 (15:32 +0200)]
virtio_net: fix error handling for mergeable buffers
Eric Dumazet noticed that if we encounter an error
when processing a mergeable buffer, we don't
dequeue all of the buffers from this packet,
the result is almost sure to be loss of networking.
Fix this issue.
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: Michael Dalton <mwdalton@google.com>
Acked-by: Michael Dalton <mwdalton@google.com>
Cc: Eric Dumazet <edumazet@google.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
(cherry picked from commit
8fc3b9e9a229778e5af3aa453c44f1a3857ba769)
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
David S. Miller [Tue, 31 Dec 2013 21:23:35 +0000 (16:23 -0500)]
vlan: Fix header ops passthru when doing TX VLAN offload.
[ Upstream commit
2205369a314e12fcec4781cc73ac9c08fc2b47de ]
When the vlan code detects that the real device can do TX VLAN offloads
in hardware, it tries to arrange for the real device's header_ops to
be invoked directly.
But it does so illegally, by simply hooking the real device's
header_ops up to the VLAN device.
This doesn't work because we will end up invoking a set of header_ops
routines which expect a device type which matches the real device, but
will see a VLAN device instead.
Fix this by providing a pass-thru set of header_ops which will arrange
to pass the proper real device instead.
To facilitate this add a dev_rebuild_header(). There are
implementations which provide a ->cache and ->create but not a
->rebuild (f.e. PLIP). So we need a helper function just like
dev_hard_header() to avoid crashes.
Use this helper in the one existing place where the
header_ops->rebuild was being invoked, the neighbour code.
With lots of help from Florian Westphal.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Florian Westphal [Sun, 22 Dec 2013 23:32:31 +0000 (00:32 +0100)]
net: rose: restore old recvmsg behavior
[ Upstream commit
f81152e35001e91997ec74a7b4e040e6ab0acccf ]
recvmsg handler in net/rose/af_rose.c performs size-check ->msg_namelen.
After commit
f3d3342602f8bcbf37d7c46641cb9bca7618eb1c
(net: rework recvmsg handler msg_name and msg_namelen logic), we now
always take the else branch due to namelen being initialized to 0.
Digging in netdev-vger-cvs git repo shows that msg_namelen was
initialized with a fixed-size since at least 1995, so the else branch
was never taken.
Compile tested only.
Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Dumazet [Fri, 20 Dec 2013 02:10:40 +0000 (18:10 -0800)]
arc_emac: fix potential use after free
[ Upstream commit
37ec274e9713eafc2ba6c4471420f06cb8f68ecf ]
Signed-off-by: Eric Dumazet <edumazet@google.com>
skb_tx_timestamp(skb) should be called _before_ TX completion
has a chance to trigger, otherwise it is too late and we access
freed memory.
Fixes:
e4f2379db6c6 ("ethernet/arc/arc_emac - Add new driver")
From: Eric Dumazet <edumazet@google.com>
Cc: Alexey Brodkin <Alexey.Brodkin@synopsys.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sasha Levin [Thu, 19 Dec 2013 04:49:42 +0000 (23:49 -0500)]
rds: prevent dereference of a NULL device
[ Upstream commit
c2349758acf1874e4c2b93fe41d072336f1a31d0 ]
Binding might result in a NULL device, which is dereferenced
causing this BUG:
[ 1317.260548] BUG: unable to handle kernel NULL pointer dereference at
000000000000097
4
[ 1317.261847] IP: [<
ffffffff84225f52>] rds_ib_laddr_check+0x82/0x110
[ 1317.263315] PGD
418bcb067 PUD
3ceb21067 PMD 0
[ 1317.263502] Oops: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
[ 1317.264179] Dumping ftrace buffer:
[ 1317.264774] (ftrace buffer empty)
[ 1317.265220] Modules linked in:
[ 1317.265824] CPU: 4 PID: 836 Comm: trinity-child46 Tainted: G W 3.13.0-rc4-
next-
20131218-sasha-00013-g2cebb9b-dirty #4159
[ 1317.267415] task:
ffff8803ddf33000 ti:
ffff8803cd31a000 task.ti:
ffff8803cd31a000
[ 1317.268399] RIP: 0010:[<
ffffffff84225f52>] [<
ffffffff84225f52>] rds_ib_laddr_check+
0x82/0x110
[ 1317.269670] RSP: 0000:
ffff8803cd31bdf8 EFLAGS:
00010246
[ 1317.270230] RAX:
0000000000000000 RBX:
ffff88020b0dd388 RCX:
0000000000000000
[ 1317.270230] RDX:
ffffffff8439822e RSI:
00000000000c000a RDI:
0000000000000286
[ 1317.270230] RBP:
ffff8803cd31be38 R08:
0000000000000000 R09:
0000000000000000
[ 1317.270230] R10:
0000000000000000 R11:
0000000000000001 R12:
0000000000000000
[ 1317.270230] R13:
0000000054086700 R14:
0000000000a25de0 R15:
0000000000000031
[ 1317.270230] FS:
00007ff40251d700(0000) GS:
ffff88022e200000(0000) knlGS:
000000000000
0000
[ 1317.270230] CS: 0010 DS: 0000 ES: 0000 CR0:
000000008005003b
[ 1317.270230] CR2:
0000000000000974 CR3:
00000003cd478000 CR4:
00000000000006e0
[ 1317.270230] DR0:
0000000000000000 DR1:
0000000000000000 DR2:
0000000000000000
[ 1317.270230] DR3:
0000000000000000 DR6:
00000000ffff0ff0 DR7:
0000000000090602
[ 1317.270230] Stack:
[ 1317.270230]
0000000054086700 5408670000a25de0 5408670000000002 0000000000000000
[ 1317.270230]
ffffffff84223542 00000000ea54c767 0000000000000000 ffffffff86d26160
[ 1317.270230]
ffff8803cd31be68 ffffffff84223556 ffff8803cd31beb8 ffff8800c6765280
[ 1317.270230] Call Trace:
[ 1317.270230] [<
ffffffff84223542>] ? rds_trans_get_preferred+0x42/0xa0
[ 1317.270230] [<
ffffffff84223556>] rds_trans_get_preferred+0x56/0xa0
[ 1317.270230] [<
ffffffff8421c9c3>] rds_bind+0x73/0xf0
[ 1317.270230] [<
ffffffff83e4ce62>] SYSC_bind+0x92/0xf0
[ 1317.270230] [<
ffffffff812493f8>] ? context_tracking_user_exit+0xb8/0x1d0
[ 1317.270230] [<
ffffffff8119313d>] ? trace_hardirqs_on+0xd/0x10
[ 1317.270230] [<
ffffffff8107a852>] ? syscall_trace_enter+0x32/0x290
[ 1317.270230] [<
ffffffff83e4cece>] SyS_bind+0xe/0x10
[ 1317.270230] [<
ffffffff843a6ad0>] tracesys+0xdd/0xe2
[ 1317.270230] Code: 00 8b 45 cc 48 8d 75 d0 48 c7 45 d8 00 00 00 00 66 c7 45 d0 02 00
89 45 d4 48 89 df e8 78 49 76 ff 41 89 c4 85 c0 75 0c 48 8b 03 <80> b8 74 09 00 00 01 7
4 06 41 bc 9d ff ff ff f6 05 2a b6 c2 02
[ 1317.270230] RIP [<
ffffffff84225f52>] rds_ib_laddr_check+0x82/0x110
[ 1317.270230] RSP <
ffff8803cd31bdf8>
[ 1317.270230] CR2:
0000000000000974
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Li RongQing [Thu, 19 Dec 2013 04:40:26 +0000 (12:40 +0800)]
ipv6: always set the new created dst's from in ip6_rt_copy
[ Upstream commit
24f5b855e17df7e355eacd6c4a12cc4d6a6c9ff0 ]
ip6_rt_copy only sets dst.from if ort has flag RTF_ADDRCONF and RTF_DEFAULT.
but the prefix routes which did get installed by hand locally can have an
expiration, and no any flag combination which can ensure a potential from
does never expire, so we should always set the new created dst's from.
This also fixes the new created dst is always expired since the ort, which
is created by RA, maybe has RTF_EXPIRES and RTF_ADDRCONF, but no RTF_DEFAULT.
Suggested-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
CC: Gao feng <gaofeng@cn.fujitsu.com>
Signed-off-by: Li RongQing <roy.qing.li@gmail.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Dumazet [Thu, 19 Dec 2013 18:53:02 +0000 (10:53 -0800)]
net: fec: fix potential use after free
[ Upstream commit
7a2a84518cfb263d2c4171b3d63671f88316adb2 ]
skb_tx_timestamp(skb) should be called _before_ TX completion
has a chance to trigger, otherwise it is too late and we access
freed memory.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Fixes:
de5fb0a05348 ("net: fec: put tx to napi poll function to fix dead lock")
Cc: Frank Li <Frank.Li@freescale.com>
Cc: Richard Cochran <richardcochran@gmail.com>
Acked-by: Richard Cochran <richardcochran@gmail.com>
Acked-by: Frank Li <Frank.Li@freescale.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Salva Peiró [Tue, 17 Dec 2013 09:06:30 +0000 (10:06 +0100)]
hamradio/yam: fix info leak in ioctl
[ Upstream commit
8e3fbf870481eb53b2d3a322d1fc395ad8b367ed ]
The yam_ioctl() code fails to initialise the cmd field
of the struct yamdrv_ioctl_cfg. Add an explicit memset(0)
before filling the structure to avoid the 4-byte info leak.
Signed-off-by: Salva Peiró <speiro@ai2.upv.es>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Wenliang Fan [Tue, 17 Dec 2013 03:25:28 +0000 (11:25 +0800)]
drivers/net/hamradio: Integer overflow in hdlcdrv_ioctl()
[ Upstream commit
e9db5c21d3646a6454fcd04938dd215ac3ab620a ]
The local variable 'bi' comes from userspace. If userspace passed a
large number to 'bi.data.calibrate', there would be an integer overflow
in the following line:
s->hdlctx.calibrate = bi.data.calibrate * s->par.bitrate / 16;
Signed-off-by: Wenliang Fan <fanwlexca@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Daniel Borkmann [Mon, 16 Dec 2013 23:38:39 +0000 (00:38 +0100)]
net: inet_diag: zero out uninitialized idiag_{src,dst} fields
[ Upstream commit
b1aac815c0891fe4a55a6b0b715910142227700f ]
Jakub reported while working with nlmon netlink sniffer that parts of
the inet_diag_sockid are not initialized when r->idiag_family != AF_INET6.
That is, fields of r->id.idiag_src[1 ... 3], r->id.idiag_dst[1 ... 3].
In fact, it seems that we can leak 6 * sizeof(u32) byte of kernel [slab]
memory through this. At least, in udp_dump_one(), we allocate a skb in ...
rep = nlmsg_new(sizeof(struct inet_diag_msg) + ..., GFP_KERNEL);
... and then pass that to inet_sk_diag_fill() that puts the whole struct
inet_diag_msg into the skb, where we only fill out r->id.idiag_src[0],
r->id.idiag_dst[0] and leave the rest untouched:
r->id.idiag_src[0] = inet->inet_rcv_saddr;
r->id.idiag_dst[0] = inet->inet_daddr;
struct inet_diag_msg embeds struct inet_diag_sockid that is correctly /
fully filled out in IPv6 case, but for IPv4 not.
So just zero them out by using plain memset (for this little amount of
bytes it's probably not worth the extra check for idiag_family == AF_INET).
Similarly, fix also other places where we fill that out.
Reported-by: Jakub Zawadzki <darkjames-ws@darkjames.pl>
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Timo Teräs [Mon, 16 Dec 2013 09:02:09 +0000 (11:02 +0200)]
ip_gre: fix msg_name parsing for recvfrom/recvmsg
[ Upstream commit
0e3da5bb8da45890b1dc413404e0f978ab71173e ]
ipgre_header_parse() needs to parse the tunnel's ip header and it
uses mac_header to locate the iphdr. This got broken when gre tunneling
was refactored as mac_header is no longer updated to point to iphdr.
Introduce skb_pop_mac_header() helper to do the mac_header assignment
and use it in ipgre_rcv() to fix msg_name parsing.
Bug introduced in commit
c54419321455 (GRE: Refactor GRE tunneling code.)
Cc: Pravin B Shelar <pshelar@nicira.com>
Signed-off-by: Timo Teräs <timo.teras@iki.fi>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sasha Levin [Fri, 13 Dec 2013 15:54:22 +0000 (10:54 -0500)]
net: unix: allow bind to fail on mutex lock
[ Upstream commit
37ab4fa7844a044dc21fde45e2a0fc2f3c3b6490 ]
This is similar to the set_peek_off patch where calling bind while the
socket is stuck in unix_dgram_recvmsg() will block and cause a hung task
spew after a while.
This is also the last place that did a straightforward mutex_lock(), so
there shouldn't be any more of these patches.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hannes Frederic Sowa [Fri, 13 Dec 2013 14:12:27 +0000 (15:12 +0100)]
ipv6: fix illegal mac_header comparison on 32bit
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jason Wang [Fri, 13 Dec 2013 09:21:27 +0000 (17:21 +0800)]
netvsc: don't flush peers notifying work during setting mtu
[ Upstream commit
50dc875f2e6e2e04aed3b3033eb0ac99192d6d02 ]
There's a possible deadlock if we flush the peers notifying work during setting
mtu:
[ 22.991149] ======================================================
[ 22.991173] [ INFO: possible circular locking dependency detected ]
[ 22.991198] 3.10.0-54.0.1.el7.x86_64.debug #1 Not tainted
[ 22.991219] -------------------------------------------------------
[ 22.991243] ip/974 is trying to acquire lock:
[ 22.991261] ((&(&net_device_ctx->dwork)->work)){+.+.+.}, at: [<
ffffffff8108af95>] flush_work+0x5/0x2e0
[ 22.991307]
but task is already holding lock:
[ 22.991330] (rtnl_mutex){+.+.+.}, at: [<
ffffffff81539deb>] rtnetlink_rcv+0x1b/0x40
[ 22.991367]
which lock already depends on the new lock.
[ 22.991398]
the existing dependency chain (in reverse order) is:
[ 22.991426]
-> #1 (rtnl_mutex){+.+.+.}:
[ 22.991449] [<
ffffffff810dfdd9>] __lock_acquire+0xb19/0x1260
[ 22.991477] [<
ffffffff810e0d12>] lock_acquire+0xa2/0x1f0
[ 22.991501] [<
ffffffff81673659>] mutex_lock_nested+0x89/0x4f0
[ 22.991529] [<
ffffffff815392b7>] rtnl_lock+0x17/0x20
[ 22.991552] [<
ffffffff815230b2>] netdev_notify_peers+0x12/0x30
[ 22.991579] [<
ffffffffa0340212>] netvsc_send_garp+0x22/0x30 [hv_netvsc]
[ 22.991610] [<
ffffffff8108d251>] process_one_work+0x211/0x6e0
[ 22.991637] [<
ffffffff8108d83b>] worker_thread+0x11b/0x3a0
[ 22.991663] [<
ffffffff81095e5d>] kthread+0xed/0x100
[ 22.991686] [<
ffffffff81681c6c>] ret_from_fork+0x7c/0xb0
[ 22.991715]
-> #0 ((&(&net_device_ctx->dwork)->work)){+.+.+.}:
[ 22.991715] [<
ffffffff810de817>] check_prevs_add+0x967/0x970
[ 22.991715] [<
ffffffff810dfdd9>] __lock_acquire+0xb19/0x1260
[ 22.991715] [<
ffffffff810e0d12>] lock_acquire+0xa2/0x1f0
[ 22.991715] [<
ffffffff8108afde>] flush_work+0x4e/0x2e0
[ 22.991715] [<
ffffffff8108e1b5>] __cancel_work_timer+0x95/0x130
[ 22.991715] [<
ffffffff8108e303>] cancel_delayed_work_sync+0x13/0x20
[ 22.991715] [<
ffffffffa03404e4>] netvsc_change_mtu+0x84/0x200 [hv_netvsc]
[ 22.991715] [<
ffffffff815233d4>] dev_set_mtu+0x34/0x80
[ 22.991715] [<
ffffffff8153bc2a>] do_setlink+0x23a/0xa00
[ 22.991715] [<
ffffffff8153d054>] rtnl_newlink+0x394/0x5e0
[ 22.991715] [<
ffffffff81539eac>] rtnetlink_rcv_msg+0x9c/0x260
[ 22.991715] [<
ffffffff8155cdd9>] netlink_rcv_skb+0xa9/0xc0
[ 22.991715] [<
ffffffff81539dfa>] rtnetlink_rcv+0x2a/0x40
[ 22.991715] [<
ffffffff8155c41d>] netlink_unicast+0xdd/0x190
[ 22.991715] [<
ffffffff8155c807>] netlink_sendmsg+0x337/0x750
[ 22.991715] [<
ffffffff8150d219>] sock_sendmsg+0x99/0xd0
[ 22.991715] [<
ffffffff8150d63e>] ___sys_sendmsg+0x39e/0x3b0
[ 22.991715] [<
ffffffff8150eba2>] __sys_sendmsg+0x42/0x80
[ 22.991715] [<
ffffffff8150ebf2>] SyS_sendmsg+0x12/0x20
[ 22.991715] [<
ffffffff81681d19>] system_call_fastpath+0x16/0x1b
This is because we hold the rtnl_lock() before ndo_change_mtu() and try to flush
the work in netvsc_change_mtu(), in the mean time, netdev_notify_peers() may be
called from worker and also trying to hold the rtnl_lock. This will lead the
flush won't succeed forever. Solve this by not canceling and flushing the work,
this is safe because the transmission done by NETDEV_NOTIFY_PEERS was
synchronized with the netif_tx_disable() called by netvsc_change_mtu().
Reported-by: Yaju Cao <yacao@redhat.com>
Tested-by: Yaju Cao <yacao@redhat.com>
Cc: K. Y. Srinivasan <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Haiyang Zhang <haiyangz@microsoft.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Nat Gurumoorthy [Mon, 9 Dec 2013 18:43:21 +0000 (10:43 -0800)]
tg3: Initialize REG_BASE_ADDR at PCI config offset 120 to 0
[ Upstream commit
388d3335575f4c056dcf7138a30f1454e2145cd8 ]
The new tg3 driver leaves REG_BASE_ADDR (PCI config offset 120)
uninitialized. From power on reset this register may have garbage in it. The
Register Base Address register defines the device local address of a
register. The data pointed to by this location is read or written using
the Register Data register (PCI config offset 128). When REG_BASE_ADDR has
garbage any read or write of Register Data Register (PCI 128) will cause the
PCI bus to lock up. The TCO watchdog will fire and bring down the system.
Signed-off-by: Nat Gurumoorthy <natg@google.com>
Acked-by: Michael Chan <mchan@broadcom.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Fan Du [Mon, 9 Dec 2013 02:33:53 +0000 (10:33 +0800)]
vxlan: release rt when found circular route
[ Upstream commit
fffc15a5012e9052d3b236efc56840841a125416 ]
Otherwise causing dst memory leakage.
Have Checked all other type tunnel device transmit implementation,
no such things happens anymore.
Signed-off-by: Fan Du <fan.du@windriver.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sasha Levin [Sat, 7 Dec 2013 22:26:27 +0000 (17:26 -0500)]
net: unix: allow set_peek_off to fail
[ Upstream commit
12663bfc97c8b3fdb292428105dd92d563164050 ]
unix_dgram_recvmsg() will hold the readlock of the socket until recv
is complete.
In the same time, we may try to setsockopt(SO_PEEK_OFF) which will hang until
unix_dgram_recvmsg() will complete (which can take a while) without allowing
us to break out of it, triggering a hung task spew.
Instead, allow set_peek_off to fail, this way userspace will not hang.
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Acked-by: Pavel Emelyanov <xemul@parallels.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stefan Tomanek [Tue, 10 Dec 2013 22:21:25 +0000 (23:21 +0100)]
inet: fix NULL pointer Oops in fib(6)_rule_suppress
[ Upstream commit
673498b8ed4c4d4b7221c5309d891c5eac2b7528 ]
This changes ensures that the routing entry investigated by the suppress
function actually does point to a device struct before following that pointer,
fixing a possible kernel oops situation when verifying the interface group
associated with a routing table entry.
According to Daniel Golle, this Oops can be triggered by a user process trying
to establish an outgoing IPv6 connection while having no real IPv6 connectivity
set up (only autoassigned link-local addresses).
Fixes:
6ef94cfafba15 ("fib_rules: add route suppression based on ifgroup")
Reported-by: Daniel Golle <daniel.golle@gmail.com>
Tested-by: Daniel Golle <daniel.golle@gmail.com>
Signed-off-by: Stefan Tomanek <stefan.tomanek@wertarbyte.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Changli Gao [Sun, 8 Dec 2013 14:36:56 +0000 (09:36 -0500)]
net: drop_monitor: fix the value of maxattr
[ Upstream commit
d323e92cc3f4edd943610557c9ea1bb4bb5056e8 ]
maxattr in genl_family should be used to save the max attribute
type, but not the max command type. Drop monitor doesn't support
any attributes, so we should leave it as zero.
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hannes Frederic Sowa [Sat, 7 Dec 2013 02:33:45 +0000 (03:33 +0100)]
ipv6: don't count addrconf generated routes against gc limit
[ Upstream commit
a3300ef4bbb1f1e33ff0400e1e6cf7733d988f4f ]
Brett Ciphery reported that new ipv6 addresses failed to get installed
because the addrconf generated dsts where counted against the dst gc
limit. We don't need to count those routes like we currently don't count
administratively added routes.
Because the max_addresses check enforces a limit on unbounded address
generation first in case someone plays with router advertisments, we
are still safe here.
Reported-by: Brett Ciphery <brett.ciphery@windriver.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Daniel Borkmann [Fri, 6 Dec 2013 10:36:15 +0000 (11:36 +0100)]
packet: fix send path when running with proto == 0
[ Upstream commit
66e56cd46b93ef407c60adcac62cf33b06119d50 ]
Commit
e40526cb20b5 introduced a cached dev pointer, that gets
hooked into register_prot_hook(), __unregister_prot_hook() to
update the device used for the send path.
We need to fix this up, as otherwise this will not work with
sockets created with protocol = 0, plus with sll_protocol = 0
passed via sockaddr_ll when doing the bind.
So instead, assign the pointer directly. The compiler can inline
these helper functions automagically.
While at it, also assume the cached dev fast-path as likely(),
and document this variant of socket creation as it seems it is
not widely used (seems not even the author of TX_RING was aware
of that in his reference example [1]). Tested with reproducer
from
e40526cb20b5.
[1] http://wiki.ipxwarzone.com/index.php5?title=Linux_packet_mmap#Example
Fixes:
e40526cb20b5 ("packet: fix use after free race in send path when dev is released")
Signed-off-by: Daniel Borkmann <dborkman@redhat.com>
Tested-by: Salam Noureddine <noureddine@aristanetworks.com>
Tested-by: Jesper Dangaard Brouer <brouer@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jiri Pirko [Thu, 5 Dec 2013 15:27:37 +0000 (16:27 +0100)]
br: fix use of ->rx_handler_data in code executed on non-rx_handler path
[ Upstream commit
859828c0ea476b42f3a93d69d117aaba90994b6f ]
br_stp_rcv() is reached by non-rx_handler path. That means there is no
guarantee that dev is bridge port and therefore simple NULL check of
->rx_handler_data is not enough. There is need to check if dev is really
bridge port and since only rcu read lock is held here, do it by checking
->rx_handler pointer.
Note that synchronize_net() in netdev_rx_handler_unregister() ensures
this approach as valid.
Introduced originally by:
commit
f350a0a87374418635689471606454abc7beaa3a
"bridge: use rx_handler_data pointer to store net_bridge_port pointer"
Fixed but not in the best way by:
commit
b5ed54e94d324f17c97852296d61a143f01b227a
"bridge: fix RCU races with bridge port"
Reintroduced by:
commit
716ec052d2280d511e10e90ad54a86f5b5d4dcc2
"bridge: fix NULL pointer deref of br_port_get_rcu"
Please apply to stable trees as well. Thanks.
RH bugzilla reference: https://bugzilla.redhat.com/show_bug.cgi?id=1025770
Reported-by: Laine Stump <laine@redhat.com>
Debugged-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jiri Pirko <jiri@resnulli.us>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Andrey Vagin [Thu, 5 Dec 2013 14:36:21 +0000 (18:36 +0400)]
virtio: delete napi structures from netdev before releasing memory
[ Upstream commit
d4fb84eefe5164f6a6ea51d0a9e26280c661a0dd ]
free_netdev calls netif_napi_del too, but it's too late, because napi
structures are placed on vi->rq. netif_napi_add() is called from
virtnet_alloc_queues.
general protection fault: 0000 [#1] SMP
Dumping ftrace buffer:
(ftrace buffer empty)
Modules linked in: ip6table_filter ip6_tables iptable_filter ip_tables virtio_balloon pcspkr virtio_net(-) i2c_pii
CPU: 1 PID: 347 Comm: rmmod Not tainted 3.13.0-rc2+ #171
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
task:
ffff8800b779c420 ti:
ffff8800379e0000 task.ti:
ffff8800379e0000
RIP: 0010:[<
ffffffff81322e19>] [<
ffffffff81322e19>] __list_del_entry+0x29/0xd0
RSP: 0018:
ffff8800379e1dd0 EFLAGS:
00010a83
RAX:
6b6b6b6b6b6b6b6b RBX:
ffff8800379c2fd0 RCX:
dead000000200200
RDX:
6b6b6b6b6b6b6b6b RSI:
0000000000000001 RDI:
ffff8800379c2fd0
RBP:
ffff8800379e1dd0 R08:
0000000000000001 R09:
0000000000000000
R10:
0000000000000000 R11:
0000000000000001 R12:
ffff8800379c2f90
R13:
ffff880037839160 R14:
0000000000000000 R15:
00000000013352f0
FS:
00007f1400e34740(0000) GS:
ffff8800bfb00000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
000000008005003b
CR2:
00007f464124c763 CR3:
00000000b68cf000 CR4:
00000000000006e0
Stack:
ffff8800379e1df0 ffffffff8155beab 6b6b6b6b6b6b6b2b ffff8800378391c0
ffff8800379e1e18 ffffffff8156499b ffff880037839be0 ffff880037839d20
ffff88003779d3f0 ffff8800379e1e38 ffffffffa003477c ffff88003779d388
Call Trace:
[<
ffffffff8155beab>] netif_napi_del+0x1b/0x80
[<
ffffffff8156499b>] free_netdev+0x8b/0x110
[<
ffffffffa003477c>] virtnet_remove+0x7c/0x90 [virtio_net]
[<
ffffffff813ae323>] virtio_dev_remove+0x23/0x80
[<
ffffffff813f62ef>] __device_release_driver+0x7f/0xf0
[<
ffffffff813f6ca0>] driver_detach+0xc0/0xd0
[<
ffffffff813f5f28>] bus_remove_driver+0x58/0xd0
[<
ffffffff813f72ec>] driver_unregister+0x2c/0x50
[<
ffffffff813ae65e>] unregister_virtio_driver+0xe/0x10
[<
ffffffffa0036942>] virtio_net_driver_exit+0x10/0x6ce [virtio_net]
[<
ffffffff810d7cf2>] SyS_delete_module+0x172/0x220
[<
ffffffff810a732d>] ? trace_hardirqs_on+0xd/0x10
[<
ffffffff810f5d4c>] ? __audit_syscall_entry+0x9c/0xf0
[<
ffffffff81677f69>] system_call_fastpath+0x16/0x1b
Code: 00 00 55 48 8b 17 48 b9 00 01 10 00 00 00 ad de 48 8b 47 08 48 89 e5 48 39 ca 74 29 48 b9 00 02 20 00 00 00
RIP [<
ffffffff81322e19>] __list_del_entry+0x29/0xd0
RSP <
ffff8800379e1dd0>
---[ end trace
d5931cd3f87c9763 ]---
Fixes:
986a4f4d452d (virtio_net: multiqueue support)
Cc: Rusty Russell <rusty@rustcorp.com.au>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Signed-off-by: Andrey Vagin <avagin@openvz.org>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jason Wang [Wed, 11 Dec 2013 05:08:34 +0000 (13:08 +0800)]
macvtap: signal truncated packets
[ Upstream commit
ce232ce01d61b184202bb185103d119820e1260c ]
macvtap_put_user() never return a value grater than iov length, this in fact
bypasses the truncated checking in macvtap_recvmsg(). Fix this by always
returning the size of packet plus the possible vlan header to let the trunca
checking work.
Cc: Vlad Yasevich <vyasevich@gmail.com>
Cc: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Vlad Yasevich <vyasevich@gmail.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vlad Yasevich [Tue, 26 Nov 2013 17:37:12 +0000 (12:37 -0500)]
macvtap: Do not double-count received packets
[ Upstream commit
006da7b07bc4d3a7ffabad17cf639eec6849c9dc ]
Currently macvlan will count received packets after calling each
vlans receive handler. Macvtap attempts to count the packet
yet again when the user reads the packet from the tap socket.
This code doesn't do this consistently either. Remove the
counting from macvtap and let only macvlan count received
packets.
Signed-off-by: Vlad Yasevich <vyasevic@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jason Wang [Wed, 11 Dec 2013 05:08:33 +0000 (13:08 +0800)]
tun: unbreak truncated packet signalling
[ Upstream commit
e6fd07c899cd719bb5517bc7f32ce03a62220351 ]
Commit
6680ec68eff47d36f67b4351bc9836fd6cba9532
(tuntap: hardware vlan tx support) breaks the truncated packet signal by nev
return a length greater than iov length in tun_put_user(). This patch fixes
by always return the length of packet plus possible vlan header. Caller can
detect the truncated packet by comparing the return value and the size of io
length.
Cc: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Vlad Yasevich <vyasevich@gmail.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Zhi Yong Wu [Fri, 6 Dec 2013 06:16:51 +0000 (14:16 +0800)]
tun: update file current position
[ Upstream commit
d0b7da8afa079ffe018ab3e92879b7138977fc8f ]
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Zhi Yong Wu [Fri, 6 Dec 2013 06:16:50 +0000 (14:16 +0800)]
macvtap: update file current position
[ Upstream commit
e6ebc7f16ca1434a334647aa56399c546be4e64b ]
Signed-off-by: Zhi Yong Wu <wuzhy@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Hannes Frederic Sowa [Thu, 5 Dec 2013 22:29:19 +0000 (23:29 +0100)]
net: clear local_df when passing skb between namespaces
[ Upstream commit
239c78db9c41a8f524cce60507440d72229d73bc ]
We must clear local_df when passing the skb between namespaces as the
packet is not local to the new namespace any more and thus may not get
fragmented by local rules. Fred Templin noticed that other namespaces
do fragment IPv6 packets while forwarding. Instead they should have send
back a PTB.
The same problem should be present when forwarding DF-IPv4 packets
between namespaces.
Reported-by: Templin, Fred L <Fred.L.Templin@boeing.com>
Signed-off-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Venkat Venkatsubra [Mon, 2 Dec 2013 23:41:39 +0000 (15:41 -0800)]
rds: prevent BUG_ON triggered on congestion update to loopback
[ Upstream commit
18fc25c94eadc52a42c025125af24657a93638c0 ]
After congestion update on a local connection, when rds_ib_xmit returns
less bytes than that are there in the message, rds_send_xmit calls
back rds_ib_xmit with an offset that causes BUG_ON(off & RDS_FRAG_SIZE)
to trigger.
For a 4Kb PAGE_SIZE rds_ib_xmit returns min(8240,4096)=4096 when actually
the message contains 8240 bytes. rds_send_xmit thinks there is more to send
and calls rds_ib_xmit again with a data offset "off" of 4096-48(rds header)
=4048 bytes thus hitting the BUG_ON(off & RDS_FRAG_SIZE) [RDS_FRAG_SIZE=4k].
The commit
6094628bfd94323fc1cea05ec2c6affd98c18f7f
"rds: prevent BUG_ON triggering on congestion map updates" introduced
this regression. That change was addressing the triggering of a different
BUG_ON in rds_send_xmit() on PowerPC architecture with 64Kbytes PAGE_SIZE:
BUG_ON(ret != 0 &&
conn->c_xmit_sg == rm->data.op_nents);
This was the sequence it was going through:
(rds_ib_xmit)
/* Do not send cong updates to IB loopback */
if (conn->c_loopback
&& rm->m_inc.i_hdr.h_flags & RDS_FLAG_CONG_BITMAP) {
rds_cong_map_updated(conn->c_fcong, ~(u64) 0);
return sizeof(struct rds_header) + RDS_CONG_MAP_BYTES;
}
rds_ib_xmit returns 8240
rds_send_xmit:
c_xmit_data_off = 0 + 8240 - 48 (rds header accounted only the first time)
= 8192
c_xmit_data_off < 65536 (sg->length), so calls rds_ib_xmit again
rds_ib_xmit returns 8240
rds_send_xmit:
c_xmit_data_off = 8192 + 8240 = 16432, calls rds_ib_xmit again
and so on (c_xmit_data_off 24672,32912,41152,49392,57632)
rds_ib_xmit returns 8240
On this iteration this sequence causes the BUG_ON in rds_send_xmit:
while (ret) {
tmp = min_t(int, ret, sg->length - conn->c_xmit_data_off);
[tmp = 65536 - 57632 = 7904]
conn->c_xmit_data_off += tmp;
[c_xmit_data_off = 57632 + 7904 = 65536]
ret -= tmp;
[ret = 8240 - 7904 = 336]
if (conn->c_xmit_data_off == sg->length) {
conn->c_xmit_data_off = 0;
sg++;
conn->c_xmit_sg++;
BUG_ON(ret != 0 &&
conn->c_xmit_sg == rm->data.op_nents);
[c_xmit_sg = 1, rm->data.op_nents = 1]
What the current fix does:
Since the congestion update over loopback is not actually transmitted
as a message, all that rds_ib_xmit needs to do is let the caller think
the full message has been transmitted and not return partial bytes.
It will return 8240 (RDS_CONG_MAP_BYTES+48) when PAGE_SIZE is 4Kb.
And 64Kb+48 when page size is 64Kb.
Reported-by: Josh Hunt <joshhunt00@gmail.com>
Tested-by: Honggang Li <honli@redhat.com>
Acked-by: Bang Nguyen <bang.nguyen@oracle.com>
Signed-off-by: Venkat Venkatsubra <venkat.x.venkatsubra@oracle.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Dumazet [Mon, 2 Dec 2013 16:51:13 +0000 (08:51 -0800)]
net: do not pretend FRAGLIST support
[ Upstream commit
28e24c62ab3062e965ef1b3bcc244d50aee7fa85 ]
Few network drivers really supports frag_list : virtual drivers.
Some drivers wrongly advertise NETIF_F_FRAGLIST feature.
If skb with a frag_list is given to them, packet on the wire will be
corrupt.
Remove this flag, as core networking stack will make sure to
provide packets that can be sent without corruption.
Signed-off-by: Eric Dumazet <edumazet@google.com>
Cc: Thadeu Lima de Souza Cascardo <cascardo@linux.vnet.ibm.com>
Cc: Anirudha Sarangi <anirudh@xilinx.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Kamala R [Mon, 2 Dec 2013 14:25:21 +0000 (19:55 +0530)]
IPv6: Fixed support for blackhole and prohibit routes
[ Upstream commit
7150aede5dd241539686e17d9592f5ebd28a2cda ]
The behaviour of blackhole and prohibit routes has been corrected by setting
the input and output pointers of the dst variable appropriately. For
blackhole routes, they are set to dst_discard and to ip6_pkt_discard and
ip6_pkt_discard_out respectively for prohibit routes.
ipv6: ip6_pkt_prohibit(_out) should not depend on
CONFIG_IPV6_MULTIPLE_TABLES
We need ip6_pkt_prohibit(_out) available without
CONFIG_IPV6_MULTIPLE_TABLES
Signed-off-by: Kamala R <kamala@aristanetworks.com>
Acked-by: Hannes Frederic Sowa <hannes@stressinduktion.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Greg Kroah-Hartman [Thu, 9 Jan 2014 20:25:44 +0000 (12:25 -0800)]
Linux 3.12.7
Nobuhiro Iwamatsu [Thu, 2 Jan 2014 20:58:53 +0000 (12:58 -0800)]
sh: add EXPORT_SYMBOL(min_low_pfn) and EXPORT_SYMBOL(max_low_pfn) to sh_ksyms_32.c
commit
ad70b029d2c678386384bd72c7fa2705c449b518 upstream.
Min_low_pfn and max_low_pfn were used in pfn_valid macro if defined
CONFIG_FLATMEM. When the functions that use the pfn_valid is used in
driver module, max_low_pfn and min_low_pfn is to undefined, and fail to
build.
ERROR: "min_low_pfn" [drivers/block/aoe/aoe.ko] undefined!
ERROR: "max_low_pfn" [drivers/block/aoe/aoe.ko] undefined!
make[2]: *** [__modpost] Error 1
make[1]: *** [modules] Error 2
This patch fix this problem.
Signed-off-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Cc: Kuninori Morimoto <kuninori.morimoto.gx@gmail.com>
Cc: Paul Mundt <lethal@linux-sh.org>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Eric Whitney [Mon, 6 Jan 2014 19:00:23 +0000 (14:00 -0500)]
ext4: fix bigalloc regression
commit
d0abafac8c9162f39c4f6b2f8141b772a09b3770 upstream.
Commit
f5a44db5d2 introduced a regression on filesystems created with
the bigalloc feature (cluster size > blocksize). It causes xfstests
generic/006 and /013 to fail with an unexpected JBD2 failure and
transaction abort that leaves the test file system in a read only state.
Other xfstests run on bigalloc file systems are likely to fail as well.
The cause is the accidental use of a cluster mask where a cluster
offset was needed in ext4_ext_map_blocks().
Signed-off-by: Eric Whitney <enwlinux@gmail.com>
Cc: Theodore Ts'o <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rafael J. Wysocki [Tue, 31 Dec 2013 12:39:42 +0000 (13:39 +0100)]
ACPIPHP / radeon / nouveau: Fix VGA switcheroo problem related to hotplug
commit
f244d8b623dae7a7bc695b0336f67729b95a9736 upstream.
The changes in the ACPI-based PCI hotplug (ACPIPHP) subsystem made
during the 3.12 development cycle uncovered a problem with VGA
switcheroo that on some systems, when the device-specific method
(ATPX in the radeon case, _DSM in the nouveau case) is used to turn
off the discrete graphics, the BIOS generates ACPI hotplug events for
that device and those events cause ACPIPHP to attempt to remove the
device from the system (they are events for a device that was present
previously and is not present any more, so that's what should be done
according to the spec). Then, the system stops functioning correctly.
Since the hotplug events in question were simply silently ignored
previously, the least intrusive way to address that problem is to
make ACPIPHP ignore them again. For this purpose, introduce a new
ACPI device flag, no_hotplug, and modify ACPIPHP to ignore hotplug
events for PCI devices whose ACPI companions have that flag set.
Next, make the radeon and nouveau switcheroo detection code set the
no_hotplug flag for the discrete graphics' ACPI companion.
Fixes:
bbd34fcdd1b2 (ACPI / hotplug / PCI: Register all devices under the given bridge)
References: https://bugzilla.kernel.org/show_bug.cgi?id=61891
References: https://bugzilla.kernel.org/show_bug.cgi?id=64891
Reported-and-tested-by: Mike Lothian <mike@fireburn.co.uk>
Reported-and-tested-by: <madcatx@atlas.cz>
Reported-and-tested-by: Joaquín Aramendía <samsagax@gmail.com>
Cc: Alex Deucher <alexdeucher@gmail.com>
Cc: Dave Airlie <airlied@linux.ie>
Cc: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Zhang Rui [Tue, 3 Sep 2013 00:32:00 +0000 (08:32 +0800)]
nouveau_acpi: convert acpi_get_handle() to acpi_has_method()
commit
187b5b5d520c2318a1f88fb8d8913a9d7fbf7d92 upstream.
acpi_has_method() is a new ACPI API introduced to check
the existence of an ACPI control method.
It can be used to replace acpi_get_handle() in the case that
1. the calling function doesn't need the ACPI handle of the control method.
and
2. the calling function doesn't care the reason why the method is unavailable.
Convert acpi_get_handle() to acpi_has_method()
in drivers/gpu/drm/nouveau/nouveau_acpi.c in this patch.
Signed-off-by: Zhang Rui <rui.zhang@intel.com>
CC: Ben Skeggs <bskeggs@redhat.com>
CC: Dave Airlie <airlied@redhat.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Benjamin LaHaise [Sat, 21 Dec 2013 22:56:08 +0000 (17:56 -0500)]
aio/migratepages: make aio migrate pages sane
commit
8e321fefb0e60bae4e2a28d20fc4fa30758d27c6 upstream.
The arbitrary restriction on page counts offered by the core
migrate_page_move_mapping() code results in rather suspicious looking
fiddling with page reference counts in the aio_migratepage() operation.
To fix this, make migrate_page_move_mapping() take an extra_count parameter
that allows aio to tell the code about its own reference count on the page
being migrated.
While cleaning up aio_migratepage(), make it validate that the old page
being passed in is actually what aio_migratepage() expects to prevent
misbehaviour in the case of races.
Signed-off-by: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linus Torvalds [Thu, 19 Dec 2013 20:11:12 +0000 (05:11 +0900)]
aio: clean up and fix aio_setup_ring page mapping
commit
3dc9acb67600393249a795934ccdfc291a200e6b upstream.
Since commit
36bc08cc01709 ("fs/aio: Add support to aio ring pages
migration") the aio ring setup code has used a special per-ring backing
inode for the page allocations, rather than just using random anonymous
pages.
However, rather than remembering the pages as it allocated them, it
would allocate the pages, insert them into the file mapping (dirty, so
that they couldn't be free'd), and then forget about them. And then to
look them up again, it would mmap the mapping, and then use
"get_user_pages()" to get back an array of the pages we just created.
Now, not only is that incredibly inefficient, it also leaked all the
pages if the mmap failed (which could happen due to excessive number of
mappings, for example).
So clean it all up, making it much more straightforward. Also remove
some left-overs of the previous (broken) mm_populate() usage that was
removed in commit
d6c355c7dabc ("aio: fix race in ring buffer page
lookup introduced by page migration support") but left the pointless and
now misleading MAP_POPULATE flag around.
Tested-and-acked-by: Benjamin LaHaise <bcrl@kvack.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dinh Nguyen [Tue, 10 Dec 2013 18:49:18 +0000 (19:49 +0100)]
clocksource: dw_apb_timer_of: Fix support for dts binding "snps,dw-apb-timer"
commit
9ab4727c1d41e50b67aecde4bf11879560a3ca78 upstream.
In commit
620f5e1cbf (dts: Rename DW APB timer compatible strings), both
"snps,dw-apb-timer-sp" and "snps,dw-apb-timer-osc" were deprecated in place
of "snps,dw-apb-timer". But the driver also needs to be udpated in order to
support this new binding "snps,dw-apb-timer".
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dinh Nguyen [Tue, 10 Dec 2013 18:49:18 +0000 (19:49 +0100)]
clocksource: dw_apb_timer_of: Fix read_sched_clock
commit
85dc6ee1237c8a4a7742e6abab96a20389b7d682 upstream.
The read_sched_clock should return the ~value because the clock is a
countdown implementation. read_sched_clock() should be the same as
__apbt_read_clocksource().
Signed-off-by: Dinh Nguyen <dinguyen@altera.com>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Moore [Tue, 10 Dec 2013 19:58:01 +0000 (14:58 -0500)]
selinux: process labeled IPsec TCP SYN-ACK packets properly in selinux_ip_postroute()
commit
c0828e50485932b7e019df377a6b0a8d1ebd3080 upstream.
Due to difficulty in arriving at the proper security label for
TCP SYN-ACK packets in selinux_ip_postroute(), we need to check packets
while/before they are undergoing XFRM transforms instead of waiting
until afterwards so that we can determine the correct security label.
Reported-by: Janak Desai <Janak.Desai@gtri.gatech.edu>
Signed-off-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Paul Moore [Tue, 10 Dec 2013 19:57:54 +0000 (14:57 -0500)]
selinux: look for IPsec labels on both inbound and outbound packets
commit
817eff718dca4e54d5721211ddde0914428fbb7c upstream.
Previously selinux_skb_peerlbl_sid() would only check for labeled
IPsec security labels on inbound packets, this patch enables it to
check both inbound and outbound traffic for labeled IPsec security
labels.
Reported-by: Janak Desai <Janak.Desai@gtri.gatech.edu>
Signed-off-by: Paul Moore <pmoore@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Geert Uytterhoeven [Thu, 19 Dec 2013 01:08:48 +0000 (17:08 -0800)]
sh: always link in helper functions extracted from libgcc
commit
84ed8a99058e61567f495cc43118344261641c5f upstream.
E.g. landisk_defconfig, which has CONFIG_NTFS_FS=m:
ERROR: "__ashrdi3" [fs/ntfs/ntfs.ko] undefined!
For "lib-y", if no symbols in a compilation unit are referenced by other
units, the compilation unit will not be included in vmlinux. This
breaks modules that do reference those symbols.
Use "obj-y" instead to fix this.
http://kisskb.ellerman.id.au/kisskb/buildresult/8838077/
This doesn't fix all cases. There are others, e.g. udivsi3.
This is also not limited to sh, many architectures handle this in the
same way.
A simple solution is to unconditionally include all helper functions.
A more complex solution is to make the choice of "lib-y" or "obj-y" depend
on CONFIG_MODULES:
obj-$(CONFIG_MODULES) += ...
lib-y($CONFIG_MODULES) += ...
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Paul Mundt <lethal@linux-sh.org>
Tested-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Reviewed-by: Nobuhiro Iwamatsu <nobuhiro.iwamatsu.yj@renesas.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Stephen Boyd [Tue, 10 Dec 2013 23:19:03 +0000 (15:19 -0800)]
gpio: msm: Fix irq mask/unmask by writing bits instead of numbers
commit
4cc629b7a20945ce35628179180329b6bc9e552b upstream.
We should be writing bits here but instead we're writing the
numbers that correspond to the bits we want to write. Fix it by
wrapping the numbers in the BIT() macro. This fixes gpios acting
as interrupts.
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Roger Quadros [Thu, 5 Dec 2013 09:23:35 +0000 (11:23 +0200)]
gpio: twl4030: Fix regression for twl gpio LED output
commit
f5837ec11f8cfa6d53ebc5806582771b2c9988c6 upstream.
Commit
0b2aa8be introduced a regression that causes failure
in setting LED GPO direction to OUT.
This causes USB host probe failures for Beagleboard C4.
platform usb_phy_gen_xceiv.2: Driver usb_phy_gen_xceiv requests probe deferral
hsusb2_vcc: Failed to request enable GPIO510: -22
reg-fixed-voltage reg-fixed-voltage.0.auto: Failed to register regulator: -22
reg-fixed-voltage: probe of reg-fixed-voltage.0.auto failed with error -22
direction_out/direction_in must return 0 if the operation succeeded.
Also, don't update direction flag and output data if twl4030_set_gpio_direction()
failed inside twl_direction_out();
Signed-off-by: Roger Quadros <rogerq@ti.com>
Acked-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Laurent Pinchart [Tue, 26 Nov 2013 01:45:34 +0000 (02:45 +0100)]
sh-pfc: Fix PINMUX_GPIO macro
commit
8620f394c4f9abd13e4fdf927d9c2bbeda74cde7 upstream.
Commit
7cbb0e55e27e ("sh-pfc: Don't duplicate argument to PINMUX_GPIO
macro") erronesouly modified the PINMUX_GPIO macro in a way that
resulted in all pins being named "name". Fix the macro to name the pins
correctly.
Cc: stable@vger.kernel.org
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Theodore Ts'o [Mon, 9 Dec 2013 02:12:59 +0000 (21:12 -0500)]
jbd2: don't BUG but return ENOSPC if a handle runs out of space
commit
f6c07cad081ba222d63623d913aafba5586c1d2c upstream.
If a handle runs out of space, we currently stop the kernel with a BUG
in jbd2_journal_dirty_metadata(). This makes it hard to figure out
what might be going on. So return an error of ENOSPC, so we can let
the file system layer figure out what is going on, to make it more
likely we can get useful debugging information). This should make it
easier to debug problems such as the one which was reported by:
https://bugzilla.kernel.org/show_bug.cgi?id=44731
The only two callers of this function are ext4_handle_dirty_metadata()
and ocfs2_journal_dirty(). The ocfs2 function will trigger a
BUG_ON(), which means there will be no change in behavior. The ext4
function will call ext4_error_inode() which will print the useful
debugging information and then handle the situation using ext4's error
handling mechanisms (i.e., which might mean halting the kernel or
remounting the file system read-only).
Also, since both file systems already call WARN_ON(), drop the WARN_ON
from jbd2_journal_dirty_metadata() to avoid two stack traces from
being displayed.
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Cc: ocfs2-devel@oss.oracle.com
Acked-by: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Martin Schwidefsky [Wed, 18 Dec 2013 13:36:18 +0000 (14:36 +0100)]
s390/3270: fix allocation of tty3270_screen structure
commit
36d9f4d3b68c7035ead3850dc85f310a579ed0eb upstream.
The tty3270_alloc_screen function is called from tty3270_install with
swapped arguments, the number of columns instead of rows and vice versa.
The number of rows is typically smaller than the number of columns which
makes the screen array too big but the individual cell arrays for the
lines too small. Creating lines longer than the number of rows will
clobber the memory after the end of the cell array.
The fix is simple, call tty3270_alloc_screen with the correct argument
order.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Maxime Ripard [Tue, 10 Dec 2013 18:37:21 +0000 (19:37 +0100)]
ARM: sun7i: dt: Fix interrupt trigger types
commit
378d0aee3b53bd8549b29dcc75f2bf47ee446e8f upstream.
The Allwinner A20 uses the ARM GIC as its internal interrupts controller. The
GIC can work on several interrupt triggers, and the A20 was actually setting it
up to use a rising edge as a trigger, while it was actually a level high
trigger, leading to some interrupts that would be completely ignored if the
edge was missed.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Olof Johansson <olof@lixom.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vladimir Davydov [Thu, 2 Jan 2014 20:58:47 +0000 (12:58 -0800)]
memcg: fix memcg_size() calculation
commit
695c60830764945cf61a2cc623eb1392d137223e upstream.
The mem_cgroup structure contains nr_node_ids pointers to
mem_cgroup_per_node objects, not the objects themselves.
Signed-off-by: Vladimir Davydov <vdavydov@parallels.com>
Acked-by: Michal Hocko <mhocko@suse.cz>
Cc: Glauber Costa <glommer@openvz.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Balbir Singh <bsingharora@gmail.com>
Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Steven Whitehouse [Wed, 18 Dec 2013 14:14:52 +0000 (14:14 +0000)]
GFS2: Fix incorrect invalidation for DIO/buffered I/O
commit
dfd11184d894cd0a92397b25cac18831a1a6a5bc upstream.
In patch
209806aba9d540dde3db0a5ce72307f85f33468f we allowed
local deferred locks to be granted against a cached exclusive
lock. That opened up a corner case which this patch now
fixes.
The solution to the problem is to check whether we have cached
pages each time we do direct I/O and if so to unmap, flush
and invalidate those pages. Since the glock state machine
normally does that for us, mostly the code will be a no-op.
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bob Peterson [Fri, 13 Dec 2013 13:31:06 +0000 (08:31 -0500)]
GFS2: Fix slab memory leak in gfs2_bufdata
commit
502be2a32f09f388e4ff34ef2e3ebcabbbb261da upstream.
This patch fixes a slab memory leak that sometimes can occur
for files with a very short lifespan. The problem occurs when
a dinode is deleted before it has gotten to the journal properly.
In the leak scenario, the bd object is pinned for journal
committment (queued to the metadata buffers queue: sd_log_le_buf)
but is subsequently unpinned and dequeued before it finds its way
to the ail or the revoke queue. In this rare circumstance, the bd
object needs to be freed from slab memory, or it is forgotten.
We have to be very careful how we do it, though, because
multiple processes can call gfs2_remove_from_journal. In order to
avoid double-frees, only the process that does the unpinning is
allowed to free the bd.
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Bob Peterson [Tue, 10 Dec 2013 17:06:35 +0000 (12:06 -0500)]
GFS2: Fix use-after-free race when calling gfs2_remove_from_ail
commit
9290a9a7c0bcf5400e8dbfbf9707fa68ea3fb338 upstream.
Function gfs2_remove_from_ail drops the reference on the bh via
brelse. This patch fixes a race condition whereby bh is deferenced
after the brelse when setting bd->bd_blkno = bh->b_blocknr;
Under certain rare circumstances, bh might be gone or reused,
and bd->bd_blkno is set to whatever that memory happens to be,
which is often 0. Later, in gfs2_trans_add_unrevoke, that bd fails
the test "bd->bd_blkno >= blkno" which causes it to never be freed.
The end result is that the bd is never freed from the bufdata cache,
which results in this error:
slab error in kmem_cache_destroy(): cache `gfs2_bufdata': Can't free all objects
Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Steven Whitehouse [Fri, 6 Dec 2013 11:52:34 +0000 (11:52 +0000)]
GFS2: don't hold s_umount over blkdev_put
commit
dfe5b9ad83a63180f358b27d1018649a27b394a9 upstream.
This is a GFS2 version of Tejun's patch:
4f331f01b9c43bf001d3ffee578a97a1e0633eac
vfs: don't hold s_umount over close_bdev_exclusive() call
In this case its blkdev_put itself that is the issue and this
patch uses the same solution of dropping and retaking s_umount.
Reported-by: Tejun Heo <tj@kernel.org>
Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Dmitry Torokhov [Fri, 27 Dec 2013 01:44:29 +0000 (17:44 -0800)]
Input: allocate absinfo data when setting ABS capability
commit
28a2a2e1aedbe2d8b2301e6e0e4e63f6e4177aca upstream.
We need to make sure we allocate absinfo data when we are setting one of
EV_ABS/ABS_XXX capabilities, otherwise we may bomb when we try to emit this
event.
Rested-by: Paul Cercueil <pcercuei@gmail.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Naoya Horiguchi [Thu, 2 Jan 2014 20:58:51 +0000 (12:58 -0800)]
mm/memory-failure.c: transfer page count from head page to tail page after split thp
commit
a3e0f9e47d5ef7858a26cc12d90ad5146e802d47 upstream.
Memory failures on thp tail pages cause kernel panic like below:
mce: [Hardware Error]: Machine check events logged
MCE exception done on CPU 7
BUG: unable to handle kernel NULL pointer dereference at
0000000000000058
IP: [<
ffffffff811b7cd1>] dequeue_hwpoisoned_huge_page+0x131/0x1e0
PGD
bae42067 PUD
ba47d067 PMD 0
Oops: 0000 [#1] SMP
...
CPU: 7 PID: 128 Comm: kworker/7:2 Tainted: G M O 3.13.0-rc4-131217-1558-00003-g83b7df08e462 #25
...
Call Trace:
me_huge_page+0x3e/0x50
memory_failure+0x4bb/0xc20
mce_process_work+0x3e/0x70
process_one_work+0x171/0x420
worker_thread+0x11b/0x3a0
? manage_workers.isra.25+0x2b0/0x2b0
kthread+0xe4/0x100
? kthread_create_on_node+0x190/0x190
ret_from_fork+0x7c/0xb0
? kthread_create_on_node+0x190/0x190
...
RIP dequeue_hwpoisoned_huge_page+0x131/0x1e0
CR2:
0000000000000058
The reasoning of this problem is shown below:
- when we have a memory error on a thp tail page, the memory error
handler grabs a refcount of the head page to keep the thp under us.
- Before unmapping the error page from processes, we split the thp,
where page refcounts of both of head/tail pages don't change.
- Then we call try_to_unmap() over the error page (which was a tail
page before). We didn't pin the error page to handle the memory error,
this error page is freed and removed from LRU list.
- We never have the error page on LRU list, so the first page state
check returns "unknown page," then we move to the second check
with the saved page flag.
- The saved page flag have PG_tail set, so the second page state check
returns "hugepage."
- We call me_huge_page() for freed error page, then we hit the above panic.
The root cause is that we didn't move refcount from the head page to the
tail page after split thp. So this patch suggests to do this.
This panic was introduced by commit
524fca1e73 ("HWPOISON: fix
misjudgement of page_action() for errors on mlocked pages"). Note that we
did have the same refcount problem before this commit, but it was just
ignored because we had only first page state check which returned "unknown
page." The commit changed the refcount problem from "doesn't work" to
"kernel panic."
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rik van Riel [Thu, 2 Jan 2014 20:58:46 +0000 (12:58 -0800)]
mm: fix use-after-free in sys_remap_file_pages
commit
4eb919825e6c3c7fb3630d5621f6d11e98a18b3a upstream.
remap_file_pages calls mmap_region, which may merge the VMA with other
existing VMAs, and free "vma". This can lead to a use-after-free bug.
Avoid the bug by remembering vm_flags before calling mmap_region, and
not trying to dereference vma later.
Signed-off-by: Rik van Riel <riel@redhat.com>
Reported-by: Dmitry Vyukov <dvyukov@google.com>
Cc: PaX Team <pageexec@freemail.hu>
Cc: Kees Cook <keescook@chromium.org>
Cc: Michel Lespinasse <walken@google.com>
Cc: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vlastimil Babka [Thu, 2 Jan 2014 20:58:44 +0000 (12:58 -0800)]
mm: munlock: fix deadlock in __munlock_pagevec()
commit
3b25df93c6e37e323b86a2a8c1e00c0a2821c6c9 upstream.
Commit
7225522bb429 ("mm: munlock: batch non-THP page isolation and
munlock+putback using pagevec" introduced __munlock_pagevec() to speed
up munlock by holding lru_lock over multiple isolated pages. Pages that
fail to be isolated are put_page()d immediately, also within the lock.
This can lead to deadlock when __munlock_pagevec() becomes the holder of
the last page pin and put_page() leads to __page_cache_release() which
also locks lru_lock. The deadlock has been observed by Sasha Levin
using trinity.
This patch avoids the deadlock by deferring put_page() operations until
lru_lock is released. Another pagevec (which is also used by later
phases of the function is reused to gather the pages for put_page()
operation.
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Vlastimil Babka [Thu, 2 Jan 2014 20:58:43 +0000 (12:58 -0800)]
mm: munlock: fix a bug where THP tail page is encountered
commit
c424be1cbbf852e46acc84d73162af3066cd2c86 upstream.
Since commit
ff6a6da60b89 ("mm: accelerate munlock() treatment of THP
pages") munlock skips tail pages of a munlocked THP page. However, when
the head page already has PageMlocked unset, it will not skip the tail
pages.
Commit
7225522bb429 ("mm: munlock: batch non-THP page isolation and
munlock+putback using pagevec") has added a PageTransHuge() check which
contains VM_BUG_ON(PageTail(page)). Sasha Levin found this triggered
using trinity, on the first tail page of a THP page without PageMlocked
flag.
This patch fixes the issue by skipping tail pages also in the case when
PageMlocked flag is unset. There is still a possibility of race with
THP page split between clearing PageMlocked and determining how many
pages to skip. The race might result in former tail pages not being
skipped, which is however no longer a bug, as during the skip the
PageTail flags are cleared.
However this race also affects correctness of NR_MLOCK accounting, which
is to be fixed in a separate patch.
Signed-off-by: Vlastimil Babka <vbabka@suse.cz>
Reported-by: Sasha Levin <sasha.levin@oracle.com>
Cc: Michel Lespinasse <walken@google.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Rik van Riel <riel@redhat.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Hugh Dickins <hughd@google.com>
Cc: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johannes Weiner [Fri, 20 Dec 2013 14:54:12 +0000 (14:54 +0000)]
mm: page_alloc: revert NUMA aspect of fair allocation policy
commit
fff4068cba484e6b0abe334ed6b15d5a215a3b25 upstream.
Commit
81c0a2bb515f ("mm: page_alloc: fair zone allocator policy") meant
to bring aging fairness among zones in system, but it was overzealous
and badly regressed basic workloads on NUMA systems.
Due to the way kswapd and page allocator interacts, we still want to
make sure that all zones in any given node are used equally for all
allocations to maximize memory utilization and prevent thrashing on the
highest zone in the node.
While the same principle applies to NUMA nodes - memory utilization is
obviously improved by spreading allocations throughout all nodes -
remote references can be costly and so many workloads prefer locality
over memory utilization. The original change assumed that
zone_reclaim_mode would be a good enough predictor for that, but it
turned out to be as indicative as a coin flip.
Revert the NUMA aspect of the fairness until we can find a proper way to
make it configurable and agree on a sane default.
Signed-off-by: Johannes Weiner <hannes@cmpxchg.org>
Reviewed-by: Michal Hocko <mhocko@suse.cz>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jianguo Wu [Thu, 19 Dec 2013 01:08:59 +0000 (17:08 -0800)]
mm/hugetlb: check for pte NULL pointer in __page_check_address()
commit
98398c32f6687ee1e1f3ae084effb4b75adb0747 upstream.
In __page_check_address(), if address's pud is not present,
huge_pte_offset() will return NULL, we should check the return value.
Signed-off-by: Jianguo Wu <wujianguo@huawei.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: qiuxishi <qiuxishi@huawei.com>
Cc: Hanjun Guo <guohanjun@huawei.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jianguo Wu [Thu, 19 Dec 2013 01:08:54 +0000 (17:08 -0800)]
mm/memory-failure.c: recheck PageHuge() after hugetlb page migrate successfully
commit
a49ecbcd7b0d5a1cda7d60e03df402dd0ef76ac8 upstream.
After a successful hugetlb page migration by soft offline, the source
page will either be freed into hugepage_freelists or buddy(over-commit
page). If page is in buddy, page_hstate(page) will be NULL. It will
hit a NULL pointer dereference in dequeue_hwpoisoned_huge_page().
BUG: unable to handle kernel NULL pointer dereference at
0000000000000058
IP: [<
ffffffff81163761>] dequeue_hwpoisoned_huge_page+0x131/0x1d0
PGD
c23762067 PUD
c24be2067 PMD 0
Oops: 0000 [#1] SMP
So check PageHuge(page) after call migrate_pages() successfully.
Signed-off-by: Jianguo Wu <wujianguo@huawei.com>
Tested-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Joonsoo Kim [Thu, 19 Dec 2013 01:08:52 +0000 (17:08 -0800)]
mm/compaction: respect ignore_skip_hint in update_pageblock_skip
commit
6815bf3f233e0b10c99a758497d5d236063b010b upstream.
update_pageblock_skip() only fits to compaction which tries to isolate
by pageblock unit. If isolate_migratepages_range() is called by CMA, it
try to isolate regardless of pageblock unit and it don't reference
get_pageblock_skip() by ignore_skip_hint. We should also respect it on
update_pageblock_skip() to prevent from setting the wrong information.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Rafael Aquini <aquini@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Joonsoo Kim [Thu, 19 Dec 2013 01:08:51 +0000 (17:08 -0800)]
mm/mempolicy: correct putback method for isolate pages if failed
commit
b0e5fd7359f1ce8db4ccb862b3aa80d2f2cbf4d0 upstream.
queue_pages_range() isolates hugetlbfs pages and putback_lru_pages()
can't handle these. We should change it to putback_movable_pages().
Naoya said that it is worth going into stable, because it can break
in-use hugepage list.
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Rafael Aquini <aquini@redhat.com>
Reviewed-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Wanpeng Li <liwanp@linux.vnet.ibm.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Zhang Yanfei <zhangyanfei@cn.fujitsu.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Tue, 7 Jan 2014 14:00:48 +0000 (14:00 +0000)]
mm: numa: defer TLB flush for THP migration as long as possible
commit
b0943d61b8fa420180f92f64ef67662b4f6cc493 upstream.
THP migration can fail for a variety of reasons. Avoid flushing the TLB
to deal with THP migration races until the copy is ready to start.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Tue, 7 Jan 2014 14:00:47 +0000 (14:00 +0000)]
mm: numa: guarantee that tlb_flush_pending updates are visible before page table updates
commit
af2c1401e6f9177483be4fad876d0073669df9df upstream.
According to documentation on barriers, stores issued before a LOCK can
complete after the lock implying that it's possible tlb_flush_pending
can be visible after a page table update. As per revised documentation,
this patch adds a smp_mb__before_spinlock to guarantee the correct
ordering.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Acked-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rik van Riel [Tue, 7 Jan 2014 14:00:46 +0000 (14:00 +0000)]
mm: fix TLB flush race between migration, and change_protection_range
commit
20841405940e7be0617612d521e206e4b6b325db upstream.
There are a few subtle races, between change_protection_range (used by
mprotect and change_prot_numa) on one side, and NUMA page migration and
compaction on the other side.
The basic race is that there is a time window between when the PTE gets
made non-present (PROT_NONE or NUMA), and the TLB is flushed.
During that time, a CPU may continue writing to the page.
This is fine most of the time, however compaction or the NUMA migration
code may come in, and migrate the page away.
When that happens, the CPU may continue writing, through the cached
translation, to what is no longer the current memory location of the
process.
This only affects x86, which has a somewhat optimistic pte_accessible.
All other architectures appear to be safe, and will either always flush,
or flush whenever there is a valid mapping, even with no permissions
(SPARC).
The basic race looks like this:
CPU A CPU B CPU C
load TLB entry
make entry PTE/PMD_NUMA
fault on entry
read/write old page
start migrating page
change PTE/PMD to new page
read/write old page [*]
flush TLB
reload TLB from new entry
read/write new page
lose data
[*] the old page may belong to a new user at this point!
The obvious fix is to flush remote TLB entries, by making sure that
pte_accessible aware of the fact that PROT_NONE and PROT_NUMA memory may
still be accessible if there is a TLB flush pending for the mm.
This should fix both NUMA migration and compaction.
[mgorman@suse.de: fix build]
Signed-off-by: Rik van Riel <riel@redhat.com>
Signed-off-by: Mel Gorman <mgorman@suse.de>
Cc: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Tue, 7 Jan 2014 14:00:45 +0000 (14:00 +0000)]
mm: numa: avoid unnecessary disruption of NUMA hinting during migration
commit
de466bd628e8d663fdf3f791bc8db318ee85c714 upstream.
do_huge_pmd_numa_page() handles the case where there is parallel THP
migration. However, by the time it is checked the NUMA hinting
information has already been disrupted. This patch adds an earlier
check with some helpers.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Tue, 7 Jan 2014 14:00:44 +0000 (14:00 +0000)]
mm: numa: clear numa hinting information on mprotect
commit
1667918b6483b12a6496bf54151b827b8235d7b1 upstream.
On a protection change it is no longer clear if the page should be still
accessible. This patch clears the NUMA hinting fault bits on a
protection change.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Tue, 7 Jan 2014 14:00:43 +0000 (14:00 +0000)]
sched: numa: skip inaccessible VMAs
commit
3c67f474558748b604e247d92b55dfe89654c81d upstream.
Inaccessible VMA should not be trapping NUMA hint faults. Skip them.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Tue, 7 Jan 2014 14:00:42 +0000 (14:00 +0000)]
mm: numa: avoid unnecessary work on the failure path
commit
eb4489f69f224356193364dc2762aa009738ca7f upstream.
If a PMD changes during a THP migration then migration aborts but the
failure path is doing more work than is necessary.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Tue, 7 Jan 2014 14:00:41 +0000 (14:00 +0000)]
mm: numa: ensure anon_vma is locked to prevent parallel THP splits
commit
c3a489cac38d43ea6dc4ac240473b44b46deecf7 upstream.
The anon_vma lock prevents parallel THP splits and any associated
complexity that arises when handling splits during THP migration. This
patch checks if the lock was successfully acquired and bails from THP
migration if it failed for any reason.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Tue, 7 Jan 2014 14:00:40 +0000 (14:00 +0000)]
mm: numa: do not clear PTE for pte_numa update
commit
0c5f83c23ca703d32f930393825487257a5cde6d upstream.
The TLB must be flushed if the PTE is updated but change_pte_range is
clearing the PTE while marking PTEs pte_numa without necessarily
flushing the TLB if it reinserts the same entry. Without the flush,
it's conceivable that two processors have different TLBs for the same
virtual address and at the very least it would generate spurious faults.
This patch only unmaps the pages in change_pte_range for a full
protection change.
[riel@redhat.com: write pte_numa pte back to the page tables]
Signed-off-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Rik van Riel <riel@redhat.com>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Cc: Chegu Vinod <chegu_vinod@hp.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Tue, 7 Jan 2014 14:00:39 +0000 (14:00 +0000)]
mm: numa: do not clear PMD during PTE update scan
commit
5a6dac3ec5f583cc8ee7bc53b5500a207c4ca433 upstream.
If the PMD is flushed then a parallel fault in handle_mm_fault() will
enter the pmd_none and do_huge_pmd_anonymous_page() path where it'll
attempt to insert a huge zero page. This is wasteful so the patch
avoids clearing the PMD when setting pmd_numa.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Tue, 7 Jan 2014 14:00:38 +0000 (14:00 +0000)]
mm: clear pmd_numa before invalidating
commit
67f87463d3a3362424efcbe8b40e4772fd34fc61 upstream.
On x86, PMD entries are similar to _PAGE_PROTNONE protection and are
handled as NUMA hinting faults. The following two page table protection
bits are what defines them
_PAGE_NUMA:set _PAGE_PRESENT:clear
A PMD is considered present if any of the _PAGE_PRESENT, _PAGE_PROTNONE,
_PAGE_PSE or _PAGE_NUMA bits are set. If pmdp_invalidate encounters a
pmd_numa, it clears the present bit leaving _PAGE_NUMA which will be
considered not present by the CPU but present by pmd_present. The
existing caller of pmdp_invalidate should handle it but it's an
inconsistent state for a PMD. This patch keeps the state consistent
when calling pmdp_invalidate.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Tue, 7 Jan 2014 14:00:37 +0000 (14:00 +0000)]
mm: numa: call MMU notifiers on THP migration
commit
f714f4f20e59ea6eea264a86b9a51fd51b88fc54 upstream.
MMU notifiers must be called on THP page migration or secondary MMUs
will get very confused.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Mel Gorman [Tue, 7 Jan 2014 14:00:36 +0000 (14:00 +0000)]
mm: numa: serialise parallel get_user_page against THP migration
commit
2b4847e73004c10ae6666c2e27b5c5430aed8698 upstream.
Base pages are unmapped and flushed from cache and TLB during normal
page migration and replaced with a migration entry that causes any
parallel NUMA hinting fault or gup to block until migration completes.
THP does not unmap pages due to a lack of support for migration entries
at a PMD level. This allows races with get_user_pages and
get_user_pages_fast which commit
3f926ab945b6 ("mm: Close races between
THP migration and PMD numa clearing") made worse by introducing a
pmd_clear_flush().
This patch forces get_user_page (fast and normal) on a pmd_numa page to
go through the slow get_user_page path where it will serialise against
THP migration and properly account for the NUMA hinting fault. On the
migration side the page table lock is taken for each PTE update.
Signed-off-by: Mel Gorman <mgorman@suse.de>
Reviewed-by: Rik van Riel <riel@redhat.com>
Cc: Alex Thorlton <athorlton@sgi.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rob Herring [Mon, 30 Dec 2013 01:37:43 +0000 (19:37 -0600)]
Revert "of/address: Handle #address-cells > 2 specially"
commit
13fcca8f25f4e9ce7f55da9cd353bb743236e212 upstream.
This reverts commit
e38c0a1fbc5803cbacdaac0557c70ac8ca5152e7.
Nikita Yushchenko reports:
While trying to make freescale p2020ds and mpc8572ds boards working
with mainline kernel, I faced that commit
e38c0a1f (Handle
Both these boards have uli1575 chip.
Corresponding part in device tree is something like
uli1575@0 {
reg = <0x0 0x0 0x0 0x0 0x0>;
#size-cells = <2>;
#address-cells = <3>;
ranges = <0x2000000 0x0 0x80000000
0x2000000 0x0 0x80000000
0x0 0x20000000
0x1000000 0x0 0x0
0x1000000 0x0 0x0
0x0 0x10000>;
isa@1e {
...
I.e. it has #address-cells = <3>
With commit
e38c0a1f reverted, devices under uli1575 are registered
correctly, e.g. for rtc
OF: ** translation for device /pcie@
ffe09000/pcie@0/uli1575@0/isa@1e/rtc@70 **
OF: bus is isa (na=2, ns=1) on /pcie@
ffe09000/pcie@0/uli1575@0/isa@1e
OF: translating address:
00000001 00000070
OF: parent bus is default (na=3, ns=2) on /pcie@
ffe09000/pcie@0/uli1575@0
OF: walking ranges...
OF: ISA map, cp=0, s=1000, da=70
OF: parent translation for:
01000000 00000000 00000000
OF: with offset: 70
OF: one level translation:
00000000 00000000 00000070
OF: parent bus is pci (na=3, ns=2) on /pcie@
ffe09000/pcie@0
OF: walking ranges...
OF: default map, cp=
a0000000, s=
20000000, da=70
OF: default map, cp=0, s=10000, da=70
OF: parent translation for:
01000000 00000000 00000000
OF: with offset: 70
OF: one level translation:
01000000 00000000 00000070
OF: parent bus is pci (na=3, ns=2) on /pcie@
ffe09000
OF: walking ranges...
OF: PCI map, cp=0, s=10000, da=70
OF: parent translation for:
01000000 00000000 00000000
OF: with offset: 70
OF: one level translation:
01000000 00000000 00000070
OF: parent bus is default (na=2, ns=2) on /
OF: walking ranges...
OF: PCI map, cp=0, s=10000, da=70
OF: parent translation for:
00000000 ffc10000
OF: with offset: 70
OF: one level translation:
00000000 ffc10070
OF: reached root node
With commit
e38c0a1f in place, address translation fails:
OF: ** translation for device /pcie@
ffe09000/pcie@0/uli1575@0/isa@1e/rtc@70 **
OF: bus is isa (na=2, ns=1) on /pcie@
ffe09000/pcie@0/uli1575@0/isa@1e
OF: translating address:
00000001 00000070
OF: parent bus is default (na=3, ns=2) on /pcie@
ffe09000/pcie@0/uli1575@0
OF: walking ranges...
OF: ISA map, cp=0, s=1000, da=70
OF: parent translation for:
01000000 00000000 00000000
OF: with offset: 70
OF: one level translation:
00000000 00000000 00000070
OF: parent bus is pci (na=3, ns=2) on /pcie@
ffe09000/pcie@0
OF: walking ranges...
OF: default map, cp=
a0000000, s=
20000000, da=70
OF: default map, cp=0, s=10000, da=70
OF: not found !
Thierry Reding confirmed this commit was not needed after all:
"We ended up merging a different address representation for Tegra PCIe
and I've confirmed that reverting this commit doesn't cause any obvious
regressions. I think all other drivers in drivers/pci/host ended up
copying what we did on Tegra, so I wouldn't expect any other breakage
either."
There doesn't appear to be a simple way to support both behaviours, so
reverting this as nothing should be depending on the new behaviour.
Signed-off-by: Rob Herring <robh@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Rafael J. Wysocki [Tue, 31 Dec 2013 12:37:46 +0000 (13:37 +0100)]
intel_pstate: Fail initialization if P-state information is missing
commit
98a947abdd54e5de909bebadfced1696ccad30cf upstream.
If pstate.current_pstate is 0 after the initial
intel_pstate_get_cpu_pstates(), this means that we were unable to
obtain any useful P-state information and there is no reason to
continue, so free memory and return an error in that case.
This fixes the following divide error occuring in a nested KVM
guest:
Intel P-state driver initializing.
Intel pstate controlling: cpu 0
cpufreq: __cpufreq_add_dev: ->get() failed
divide error: 0000 [#1] SMP
Modules linked in:
CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.13.0-0.rc4.git5.1.fc21.x86_64 #1
Hardware name: Bochs Bochs, BIOS Bochs 01/01/2011
task:
ffff88001ea20000 ti:
ffff88001e9bc000 task.ti:
ffff88001e9bc000
RIP: 0010:[<
ffffffff815c551d>] [<
ffffffff815c551d>] intel_pstate_timer_func+0x11d/0x2b0
RSP: 0000:
ffff88001ee03e18 EFLAGS:
00010246
RAX:
0000000000000000 RBX:
ffff88001a454348 RCX:
0000000000006100
RDX:
0000000000000000 RSI:
0000000000000000 RDI:
0000000000000000
RBP:
ffff88001ee03e38 R08:
0000000000000000 R09:
0000000000000000
R10:
ffff88001ea20000 R11:
0000000000000000 R12:
00000c0a1ea20000
R13:
1ea200001ea20000 R14:
ffffffff815c5400 R15:
ffff88001a454348
FS:
0000000000000000(0000) GS:
ffff88001ee00000(0000) knlGS:
0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0:
000000008005003b
CR2:
0000000000000000 CR3:
0000000001c0c000 CR4:
00000000000006f0
Stack:
fffffffb1a454390 ffffffff821a4500 ffff88001a454390 0000000000000100
ffff88001ee03ea8 ffffffff81083e9a ffffffff81083e15 ffffffff82d5ed40
ffffffff8258cc60 0000000000000000 ffffffff81ac39de 0000000000000000
Call Trace:
<IRQ>
[<
ffffffff81083e9a>] call_timer_fn+0x8a/0x310
[<
ffffffff81083e15>] ? call_timer_fn+0x5/0x310
[<
ffffffff815c5400>] ? pid_param_set+0x130/0x130
[<
ffffffff81084354>] run_timer_softirq+0x234/0x380
[<
ffffffff8107aee4>] __do_softirq+0x104/0x430
[<
ffffffff8107b5fd>] irq_exit+0xcd/0xe0
[<
ffffffff81770645>] smp_apic_timer_interrupt+0x45/0x60
[<
ffffffff8176efb2>] apic_timer_interrupt+0x72/0x80
<EOI>
[<
ffffffff810e15cd>] ? vprintk_emit+0x1dd/0x5e0
[<
ffffffff81757719>] printk+0x67/0x69
[<
ffffffff815c1493>] __cpufreq_add_dev.isra.13+0x883/0x8d0
[<
ffffffff815c14f0>] cpufreq_add_dev+0x10/0x20
[<
ffffffff814a14d1>] subsys_interface_register+0xb1/0xf0
[<
ffffffff815bf5cf>] cpufreq_register_driver+0x9f/0x210
[<
ffffffff81fb19af>] intel_pstate_init+0x27d/0x3be
[<
ffffffff81761e3e>] ? mutex_unlock+0xe/0x10
[<
ffffffff81fb1732>] ? cpufreq_gov_dbs_init+0x12/0x12
[<
ffffffff8100214a>] do_one_initcall+0xfa/0x1b0
[<
ffffffff8109dbf5>] ? parse_args+0x225/0x3f0
[<
ffffffff81f64193>] kernel_init_freeable+0x1fc/0x287
[<
ffffffff81f638d0>] ? do_early_param+0x88/0x88
[<
ffffffff8174b530>] ? rest_init+0x150/0x150
[<
ffffffff8174b53e>] kernel_init+0xe/0x130
[<
ffffffff8176e27c>] ret_from_fork+0x7c/0xb0
[<
ffffffff8174b530>] ? rest_init+0x150/0x150
Code: c1 e0 05 48 63 bc 03 10 01 00 00 48 63 83 d0 00 00 00 48 63 d6 48 c1 e2 08 c1 e1 08 4c 63 c2 48 c1 e0 08 48 98 48 c1 e0 08 48 99 <49> f7 f8 48 98 48 0f af f8 48 c1 ff 08 29 f9 89 ca c1 fa 1f 89
RIP [<
ffffffff815c551d>] intel_pstate_timer_func+0x11d/0x2b0
RSP <
ffff88001ee03e18>
---[ end trace
f166110ed22cc37a ]---
Kernel panic - not syncing: Fatal exception in interrupt
Reported-and-tested-by: Kashyap Chamarthy <kchamart@redhat.com>
Cc: Josh Boyer <jwboyer@fedoraproject.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Toshi Kani [Wed, 27 Nov 2013 20:33:09 +0000 (13:33 -0700)]
ACPI / PCI / hotplug: Avoid warning when _ADR not present
commit
f26ca1d699e8b54a50d9faf82327d3c2072aaedd upstream.
acpiphp_enumerate_slots() walks ACPI namenamespace under
a PCI host bridge with callback register_slot().
register_slot() evaluates _ADR for all the device objects
and emits a warning message for any error. Some platforms
have _HID device objects (such as HPET and IPMI), which
trigger unnecessary warning messages.
This patch avoids emitting a warning message when a target
device object does not have _ADR.
Signed-off-by: Toshi Kani <toshi.kani@hp.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Jan Kara [Tue, 3 Dec 2013 10:20:06 +0000 (11:20 +0100)]
ext2: Fix oops in ext2_get_block() called from ext2_quota_write()
commit
df4e7ac0bb70abc97fbfd9ef09671fc084b3f9db upstream.
ext2_quota_write() doesn't properly setup bh it passes to
ext2_get_block() and thus we hit assertion BUG_ON(maxblocks == 0) in
ext2_get_blocks() (or we could actually ask for mapping arbitrary number
of blocks depending on whatever value was on stack).
Fix ext2_quota_write() to properly fill in number of blocks to map.
Reviewed-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Larry Finger [Wed, 11 Dec 2013 23:13:10 +0000 (17:13 -0600)]
rtlwifi: pci: Fix oops on driver unload
commit
9278db6279e28d4d433bc8a848e10b4ece8793ed upstream.
On Fedora systems, unloading rtl8192ce causes an oops. This patch fixes the
problem reported at https://bugzilla.redhat.com/show_bug.cgi?id=852761.
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Johannes Berg [Mon, 16 Dec 2013 11:04:36 +0000 (12:04 +0100)]
radiotap: fix bitmap-end-finding buffer overrun
commit
bd02cd2549cfcdfc57cb5ce57ffc3feb94f70575 upstream.
Evan Huus found (by fuzzing in wireshark) that the radiotap
iterator code can access beyond the length of the buffer if
the first bitmap claims an extension but then there's no
data at all. Fix this.
Reported-by: Evan Huus <eapache@gmail.com>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Shirish Pargaonkar [Wed, 11 Dec 2013 22:29:53 +0000 (16:29 -0600)]
cifs: set FILE_CREATED
commit
f1e3268126a35b9d3cb8bf67487fcc6cd13991d8 upstream.
Set FILE_CREATED on O_CREAT|O_EXCL.
cifs code didn't change during commit
116cc0225381415b96551f725455d067f63a76a0
Kernel bugzilla 66251
Signed-off-by: Shirish Pargaonkar <spargaonkar@suse.com>
Acked-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Sachin Prabhu [Mon, 25 Nov 2013 17:09:48 +0000 (17:09 +0000)]
cifs: We do not drop reference to tlink in CIFSCheckMFSymlink()
commit
750b8de6c4277d7034061e1da50663aa1b0479e4 upstream.
When we obtain tcon from cifs_sb, we use cifs_sb_tlink() to first obtain
tlink which also grabs a reference to it. We do not drop this reference
to tlink once we are done with the call.
The patch fixes this issue by instead passing tcon as a parameter and
avoids having to obtain a reference to the tlink. A lookup for the tcon
is already made in the calling functions and this way we avoid having to
re-run the lookup. This is also consistent with the argument list for
other similar calls for M-F symlinks.
We should also return an ENOSYS when we do not find a protocol specific
function to lookup the MF Symlink data.
Signed-off-by: Sachin Prabhu <sprabhu@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
Signed-off-by: Steve French <smfrench@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Tejun Heo [Wed, 18 Dec 2013 12:07:32 +0000 (07:07 -0500)]
libata, freezer: avoid block device removal while system is frozen
commit
85fbd722ad0f5d64d1ad15888cd1eb2188bfb557 upstream.
Freezable kthreads and workqueues are fundamentally problematic in
that they effectively introduce a big kernel lock widely used in the
kernel and have already been the culprit of several deadlock
scenarios. This is the latest occurrence.
During resume, libata rescans all the ports and revalidates all
pre-existing devices. If it determines that a device has gone
missing, the device is removed from the system which involves
invalidating block device and flushing bdi while holding driver core
layer locks. Unfortunately, this can race with the rest of device
resume. Because freezable kthreads and workqueues are thawed after
device resume is complete and block device removal depends on
freezable workqueues and kthreads (e.g. bdi_wq, jbd2) to make
progress, this can lead to deadlock - block device removal can't
proceed because kthreads are frozen and kthreads can't be thawed
because device resume is blocked behind block device removal.
839a8e8660b6 ("writeback: replace custom worker pool implementation
with unbound workqueue") made this particular deadlock scenario more
visible but the underlying problem has always been there - the
original forker task and jbd2 are freezable too. In fact, this is
highly likely just one of many possible deadlock scenarios given that
freezer behaves as a big kernel lock and we don't have any debug
mechanism around it.
I believe the right thing to do is getting rid of freezable kthreads
and workqueues. This is something fundamentally broken. For now,
implement a funny workaround in libata - just avoid doing block device
hot[un]plug while the system is frozen. Kernel engineering at its
finest. :(
v2: Add EXPORT_SYMBOL_GPL(pm_freezing) for cases where libata is built
as a module.
v3: Comment updated and polling interval changed to 10ms as suggested
by Rafael.
v4: Add #ifdef CONFIG_FREEZER around the hack as pm_freezing is not
defined when FREEZER is not configured thus breaking build.
Reported by kbuild test robot.
Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Tomaž Šolc <tomaz.solc@tablix.org>
Reviewed-by: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Link: https://bugzilla.kernel.org/show_bug.cgi?id=62801
Link: http://lkml.kernel.org/r/20131213174932.GA27070@htj.dyndns.org
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Len Brown <len.brown@intel.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>