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md: bcache: io.c: fix a potential NULL pointer dereference

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bio_alloc_bioset returns NULL on failure. This fix adds a missing check
for potential NULL pointer dereferencing.

Signed-off-by: Kumar Amit Mehta <gmate.amit@gmail.com>
Signed-off-by: Kent Overstreet <koverstreet@google.com>
This commit is contained in:
Kumar Amit Mehta 2013-05-28 00:31:15 -07:00 • committed by Kent Overstreet
parent 9e895ace5d
commit 5c694129c8
1 changed files with 2 additions and 0 deletions

2
drivers/md/bcache/io.c
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@ -97,6 +97,8 @@ struct bio *bch_bio_split(struct bio *bio, int sectors,
if (bio->bi_rw & REQ_DISCARD) {
ret = bio_alloc_bioset(gfp, 1, bs);
if (!ret)
return NULL;
idx = 0;
goto out;
}