Messages in this thread Patch in this message | | | Subject | [PATCH] block: blk-flush: Check return value of bio_alloc() | From | Axel Lin <> | Date | Sun, 21 Jun 2015 16:39:33 +0800 |
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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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