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SUNRPC: Fix a race between work-queue and rpc_killall_tasks
authorTrond Myklebust <Trond.Myklebust@netapp.com>
Wed, 6 Jul 2011 23:58:23 +0000 (19:58 -0400)
committerTrond Myklebust <Trond.Myklebust@netapp.com>
Fri, 8 Jul 2011 00:45:37 +0000 (20:45 -0400)
Since rpc_killall_tasks may modify the rpc_task's tk_action field
without any locking, we need to be careful when dereferencing it.

Reported-by: Ben Greear <greearb@candelatech.com>
Tested-by: Ben Greear <greearb@candelatech.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
Cc: stable@kernel.org

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