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(parent: 47a7b0d) | patch
raid5: fix a small race condition
authorShaohua Li <shli@fb.com>
Thu, 8 Sep 2016 17:43:58 +0000 (10:43 -0700)
committerShaohua Li <shli@fb.com>
Fri, 9 Sep 2016 18:09:19 +0000 (11:09 -0700)
commitc94455558337eece474eebb6a16b905f98930418
tree7e3120b034308cb83e83e6f93f40745f206848cftree | snapshot (tar.gz zip)
parent47a7b0d8888c04c9746812820b6e60553cc77bbccommit | diff
raid5: fix a small race condition

commit 5f9d1fde7d54a5(raid5: fix memory leak of bio integrity data)
moves bio_reset to bio_endio. But it introduces a small race condition.
It does bio_reset after raid5_release_stripe, which could make the
stripe reusable and hence reuse the bio just before bio_reset. Moving
bio_reset before raid5_release_stripe is called should fix the race.

Reported-and-tested-by: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
Signed-off-by: Shaohua Li <shli@fb.com>
drivers/md/raid5.c diff | blob | blame | history