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btrfs: async-thread: Fix a use-after-free error for trace
authorQu Wenruo <quwenruo@cn.fujitsu.com>
Fri, 22 Jan 2016 01:28:38 +0000 (09:28 +0800)
committerChris Mason <clm@fb.com>
Tue, 26 Jan 2016 00:50:26 +0000 (16:50 -0800)
commit4eef65d9e52ab4cc7f83a5ed48b98a828f193899
tree961bebab8ad070e86c3e5600e3617d28104a16b5tree | snapshot
parent8c9ac58637813b3aee1c27e95e8d8351527cb47ccommit | diff
btrfs: async-thread: Fix a use-after-free error for trace

Parameter of trace_btrfs_work_queued() can be freed in its workqueue.
So no one use use that pointer after queue_work().

Fix the user-after-free bug by move the trace line before queue_work().

Reported-by: Dave Jones <davej@codemonkey.org.uk>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: Chris Mason <clm@fb.com>
fs/btrfs/async-thread.c diff | blob | history
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