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authorRobin Holt <holt@sgi.com>2010-10-26 14:21:15 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2010-11-22 10:47:38 -0800
commit73d4907e4d42bb42307807d4929be76e6b4a92a0 (patch)
treeadf28de2ab5ee21d3cb41d233eaa993384b2f81a /block/blk-barrier.c
parentc4244895dd30ddfd20086308786e108d3c52161c (diff)
sgi-xp: incoming XPC channel messages can come in after the channel's partition structures have been torn down
commit 09358972bff5ce99de496bbba97c85d417b3c054 upstream. Under some workloads, some channel messages have been observed being delayed on the sending side past the point where the receiving side has been able to tear down its partition structures. This condition is already detected in xpc_handle_activate_IRQ_uv(), but that information is not given to xpc_handle_activate_mq_msg_uv(). As a result, xpc_handle_activate_mq_msg_uv() assumes the structures still exist and references them, causing a NULL-pointer deref. Signed-off-by: Robin Holt <holt@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@suse.de>
Diffstat (limited to 'block/blk-barrier.c')
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