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Subject[PATCH] block: blk-flush: Check return value of bio_alloc()
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Date
bio_alloc() can return NULL, so add NULL test to prevent NULL pointer
dereference.

Signed-off-by: Axel Lin <axel.lin@ingics.com>
---
block/blk-flush.c | 3 +++
1 file changed, 3 insertions(+)

diff --git a/block/blk-flush.c b/block/blk-flush.c
index 20badd7..4706641 100644
--- a/block/blk-flush.c
+++ b/block/blk-flush.c
@@ -470,6 +470,9 @@ int blkdev_issue_flush(struct block_device *bdev, gfp_t gfp_mask,
return -ENXIO;

bio = bio_alloc(gfp_mask, 0);
+ if (!bio)
+ return -ENOMEM;
+
bio->bi_bdev = bdev;

ret = submit_bio_wait(WRITE_FLUSH, bio);
--
2.1.0


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