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| author | Qu Wenruo <quwenruo@cn.fujitsu.com> | 2017-03-29 09:33:22 +0800 |
|---|---|---|
| committer | David Sterba <dsterba@suse.com> | 2017-04-18 14:07:26 +0200 |
| commit | e501bfe323356ea3f7ef79d4b0d95389b70a7193 (patch) | |
| tree | 870724f193b99f9388dce8e7cbdfcb96b3cfeed5 /sound/sparc | |
| parent | ae6529c35bcc1c65c12131cef2aea63d8e2ea950 (diff) | |
| download | linux-e501bfe323356ea3f7ef79d4b0d95389b70a7193.tar.bz2 | |
btrfs: Prevent scrub recheck from racing with dev replace
scrub_setup_recheck_block() calls btrfs_map_sblock() and then accesses
bbio without protection of bio_counter.
This can lead to use-after-free if racing with dev replace cancel.
Fix it by increasing bio_counter before calling btrfs_map_sblock() and
decreasing the bio_counter when corresponding recover is finished.
Cc: Liu Bo <bo.li.liu@oracle.com>
Reported-by: Liu Bo <bo.li.liu@oracle.com>
Signed-off-by: Qu Wenruo <quwenruo@cn.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Diffstat (limited to 'sound/sparc')
0 files changed, 0 insertions, 0 deletions