This is a note to let you know that I've just added the patch titled
net: avoid NULL deref in inet_ctl_sock_destroy()
to the 4.1-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-avoid-null-deref-in-inet_ctl_sock_destroy.patch
and it can be found in the queue-4.1 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From foo@baz Tue Nov 17 14:35:45 PST 2015
From: Eric Dumazet <edumazet@xxxxxxxxxx>
Date: Mon, 2 Nov 2015 07:50:07 -0800
Subject: net: avoid NULL deref in inet_ctl_sock_destroy()
From: Eric Dumazet <edumazet@xxxxxxxxxx>
[ Upstream commit 8fa677d2706d325d71dab91bf6e6512c05214e37 ]
Under low memory conditions, tcp_sk_init() and icmp_sk_init()
can both iterate on all possible cpus and call inet_ctl_sock_destroy(),
with eventual NULL pointer.
Signed-off-by: Eric Dumazet <edumazet@xxxxxxxxxx>
Reported-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/net/inet_common.h | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
--- a/include/net/inet_common.h
+++ b/include/net/inet_common.h
@@ -41,7 +41,8 @@ int inet_recv_error(struct sock *sk, str
static inline void inet_ctl_sock_destroy(struct sock *sk)
{
- sk_release_kernel(sk);
+ if (sk)
+ sk_release_kernel(sk);
}
#endif
Patches currently in stable-queue which might be from edumazet@xxxxxxxxxx are
queue-4.1/ipv6-gre-support-sit-encapsulation.patch
queue-4.1/ipmr-fix-possible-race-resulting-from-improper-usage-of-ip_inc_stats_bh-in-preemptible-context.patch
queue-4.1/net-avoid-null-deref-in-inet_ctl_sock_destroy.patch
queue-4.1/net-fix-a-race-in-dst_release.patch
queue-4.1/sit-fix-sit0-percpu-double-allocations.patch
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