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Message-Id: <20120524.002729.1984174187865627892.davem@davemloft.net> Date: Thu, 24 May 2012 00:27:29 -0400 (EDT) From: David Miller <davem@...emloft.net> To: eric.dumazet@...il.com Cc: kunx.jiang@...el.com, netdev@...r.kernel.org, linux-kernel@...r.kernel.org, yanmin_zhang@...ux.intel.com Subject: Re: [PATCH V2] ipv4: fix the rcu race between free_fib_info and ip_route_output_slow From: Eric Dumazet <eric.dumazet@...il.com> Date: Thu, 24 May 2012 04:42:42 +0200 > On Thu, 2012-05-24 at 09:39 +0800, kun.jiang wrote: >> From: Yanmin Zhang <yanmin_zhang@...ux.intel.com> >> >> We hit a kernel OOPS. >> > ... >> >> Function free_fib_info resets nexthop_nh->nh_dev to NULL before releasing >> fi. Other cpu might be accessing fi. Fixing it by delaying the releasing. >> >> With the patch, we ran MTBF testing on Android mobile for 12 hours >> and didn't trigger the issue. >> >> Thank Eric for very detailed review/checking the issue. >> >> Signed-off-by: Yanmin Zhang <yanmin_zhang@...ux.intel.com> >> Signed-off-by: Kun Jiang <kunx.jiang@...el.com> >> --- >> net/ipv4/fib_semantics.c | 12 ++++++------ >> 1 files changed, 6 insertions(+), 6 deletions(-) > > Acked-by: Eric Dumazet <edumazet@...gle.com> Applied, thanks everyone. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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