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authorKent Overstreet <kmo@daterainc.com>2013-10-10 17:31:15 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-10-10 18:17:39 -0700
commit2fe80d3bbf1c8bd9efc5b8154207c8dd104e7306 (patch)
tree729b2f1de3b8bf8eb96e1640c415b8d0c3b5fe1c
parente3e8ded06f0960d642a81dd676fff0367af68ba0 (diff)
bcache: Fix a null ptr deref regression
Commit c0f04d88e46d ("bcache: Fix flushes in writeback mode") was fixing a reported data corruption bug, but it seems some last minute refactoring or rebasing introduced a null pointer deref. Signed-off-by: Kent Overstreet <kmo@daterainc.com> Cc: linux-stable <stable@vger.kernel.org> # >= v3.10 Reported-by: Gabriel de Perthuis <g2p.code@gmail.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/md/bcache/request.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c
index 71eb233b9ace..b6a74bcbb08f 100644
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -996,6 +996,7 @@ static void request_write(struct cached_dev *dc, struct search *s)
closure_bio_submit(bio, cl, s->d);
} else {
bch_writeback_add(dc);
+ s->op.cache_bio = bio;
if (bio->bi_rw & REQ_FLUSH) {
/* Also need to send a flush to the backing device */
@@ -1008,8 +1009,6 @@ static void request_write(struct cached_dev *dc, struct search *s)
flush->bi_private = cl;
closure_bio_submit(flush, cl, s->d);
- } else {
- s->op.cache_bio = bio;
}
}
out: