From: Yanko Kaneti <yaneti@declera.com>
To: Herbert Xu <herbert@gondor.apana.org.au>
Cc: "Michael S.Tsirkin" <mst@redhat.com>,
Qianfeng Zhang <frzhang@redhat.com>,
"David S.Miller" <davem@davemloft.net>,
netdev@vger.kernel.org, WANG Cong <amwang@redhat.com>,
Stephen Hemminger <shemminger@vyatta.com>,
Matt Mackall <mpm@selenic.com>
Subject: Re: [0/8] netpoll/bridge fixes
Date: Tue, 29 Jun 2010 15:53:51 +0300 [thread overview]
Message-ID: <1277816031.3640.14.camel@d2> (raw)
In-Reply-To: <20100610124047.GA16658@gondor.apana.org.au>
On Thu, 2010-06-10 at 22:40 +1000, Herbert Xu wrote:
> Hi:
>
> Qianfeng Zhang reported that he was seeing crashes with the
> attached backtrace.
>
> I tracked this down to the recently added netpoll support in
> the bridge device. It's a classic use-after-free problem.
>
> Trying to solve it brought out a host of other issues, some of
> which existed prior to the new bridge code. The following patches
> attempt to address some of these issues.
>
> Warning, this is completely untested (apart from compiling with
> everything enabled) so please look but don't merge :)
FWIW 2.6.35-0.2.rc3.git0.fc14.x86_64 and later rawhide kernels are
causing quite reproducible __br_deliver crashes on routine f13
netinstalls in a kvm guest here.
To test I cherry picked this series +
netpoll-Use-correct-primitives-for-RCU-dereferencing and
net-fix-netpoll-Allow-netpoll_setup-cleanup-recursion from net-next on
top of 2.6.35-0.15.rc3.git3.fc14.x86_64 (which is todays linus tree) and
it seems to fix the crashes for me.
Perhaps the netpoll fixes should find their way to a rc before 2.6.35
goes golden.
Regards
Yanko
prev parent reply other threads:[~2010-06-29 13:00 UTC|newest]
Thread overview: 63+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-06-10 12:40 [0/8] netpoll/bridge fixes Herbert Xu
2010-06-10 12:42 ` [PATCH 1/7] netpoll: Set npinfo to NULL even with ndo_netpoll_cleanup Herbert Xu
2010-06-10 12:42 ` [PATCH 2/7] bridge: Remove redundant npinfo NULL setting Herbert Xu
2010-06-10 12:42 ` [PATCH 3/7] netpoll: Fix RCU usage Herbert Xu
2010-06-10 12:42 ` [PATCH 4/7] netpoll: Add locking for netpoll_setup/cleanup Herbert Xu
2010-06-10 12:42 ` [PATCH 5/7] netpoll: Add ndo_netpoll_setup Herbert Xu
2010-06-10 12:42 ` [PATCH 6/7] netpoll: Allow netpoll_setup/cleanup recursion Herbert Xu
2010-06-10 12:42 ` [PATCH 7/7] bridge: Fix netpoll support Herbert Xu
2010-06-10 14:49 ` [0/8] netpoll/bridge fixes Stephen Hemminger
2010-06-10 21:56 ` Herbert Xu
2010-06-10 21:59 ` Stephen Hemminger
2010-06-10 22:48 ` Herbert Xu
2010-06-11 2:11 ` Herbert Xu
2010-06-11 2:12 ` [PATCH 1/8] netpoll: Set npinfo to NULL even with ndo_netpoll_cleanup Herbert Xu
2010-06-11 2:12 ` [PATCH 2/8] bridge: Remove redundant npinfo NULL setting Herbert Xu
2010-06-11 2:12 ` [PATCH 3/8] netpoll: Fix RCU usage Herbert Xu
2010-06-11 23:10 ` Paul E. McKenney
2010-06-11 2:12 ` [PATCH 4/8] netpoll: Add locking for netpoll_setup/cleanup Herbert Xu
2010-06-11 2:12 ` [PATCH 5/8] netpoll: Add ndo_netpoll_setup Herbert Xu
2010-06-11 2:12 ` [PATCH 6/8] netpoll: Allow netpoll_setup/cleanup recursion Herbert Xu
2010-06-25 1:21 ` Andrew Morton
2010-06-25 3:01 ` Herbert Xu
2010-06-25 3:30 ` David Miller
2010-06-25 3:50 ` Andrew Morton
2010-06-25 4:27 ` David Miller
2010-06-25 4:42 ` Andrew Morton
2010-06-25 4:52 ` David Miller
2010-06-25 8:08 ` Peter Zijlstra
2010-06-25 8:42 ` Andrew Morton
2010-06-25 9:45 ` Peter Zijlstra
2010-06-25 8:46 ` Ingo Molnar
2010-06-25 10:08 ` Nick Piggin
2010-06-11 2:12 ` [PATCH 7/8] netpoll: Add netpoll_tx_running Herbert Xu
2010-06-11 2:12 ` [PATCH 8/8] bridge: Fix netpoll support Herbert Xu
2010-06-11 3:08 ` fired a bug report on bugzilla.redhat.com Qianfeng Zhang
2010-06-15 10:28 ` [PATCH 8/8] bridge: Fix netpoll support Cong Wang
2010-06-17 10:38 ` Herbert Xu
2010-06-17 10:57 ` Cong Wang
2010-06-17 10:55 ` Herbert Xu
2010-06-18 3:06 ` Cong Wang
2010-06-11 20:03 ` [0/8] netpoll/bridge fixes Matt Mackall
2010-06-15 10:17 ` Cong Wang
2010-06-15 18:39 ` David Miller
2010-06-16 2:58 ` Eric Dumazet
2010-06-16 3:03 ` Eric Dumazet
2010-06-16 3:33 ` Herbert Xu
2010-06-16 4:47 ` David Miller
2010-06-16 23:02 ` Paul E. McKenney
2010-06-17 10:18 ` Michael S. Tsirkin
2010-06-17 21:26 ` Paul E. McKenney
2010-06-16 6:16 ` Eric Dumazet
2010-06-16 5:08 ` Paul E. McKenney
2010-06-16 6:21 ` Eric Dumazet
2010-06-16 16:01 ` Paul E. McKenney
2010-07-19 10:19 ` Michael S. Tsirkin
2010-07-19 10:53 ` Herbert Xu
2010-07-19 11:54 ` Herbert Xu
2010-07-19 16:05 ` David Miller
2010-07-19 16:52 ` Eric Dumazet
2010-07-19 20:35 ` David Miller
2010-07-20 5:26 ` Herbert Xu
2010-07-20 6:28 ` David Miller
2010-06-29 12:53 ` Yanko Kaneti [this message]
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