3.11-stable review patch. If anyone has any objections, please let me know.
------------------
From: Kent Overstreet <k...@daterainc.com>
commit 2fe80d3bbf1c8bd9efc5b8154207c8dd104e7306 upstream.
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 <k...@daterainc.com>
Reported-by: Gabriel de Perthuis <g2p.c...@gmail.com>
Signed-off-by: Linus Torvalds <torva...@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gre...@linuxfoundation.org>
---
drivers/md/bcache/request.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)
--- a/drivers/md/bcache/request.c
+++ b/drivers/md/bcache/request.c
@@ -996,6 +996,7 @@ static void request_write(struct cached_
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_
flush->bi_private = cl;
closure_bio_submit(flush, cl, s->d);
- } else {
- s->op.cache_bio = bio;
}
}
out:
--
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