From mboxrd@z Thu Jan 1 00:00:00 1970 From: Kent Overstreet Subject: [PATCH] bcache: Fix a null ptr deref regression Date: Thu, 10 Oct 2013 17:31:15 -0700 Message-ID: <1381451475-24551-2-git-send-email-kmo@daterainc.com> References: <1381451475-24551-1-git-send-email-kmo@daterainc.com> Return-path: In-Reply-To: <1381451475-24551-1-git-send-email-kmo@daterainc.com> Sender: linux-kernel-owner@vger.kernel.org To: torvalds@linux-foundation.org, axboe@kernel.dk Cc: linux-kernel@vger.kernel.org, linux-bcache@vger.kernel.org, Kent Overstreet List-Id: linux-bcache@vger.kernel.org c0f04d8 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 Cc: linux-stable # >= v3.10 Reported-by: Gabriel de Perthuis --- drivers/md/bcache/request.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/md/bcache/request.c b/drivers/md/bcache/request.c index 71eb233..b6a74bc 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: -- 1.8.4.rc3