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Groups > linux.kernel > #1169537
| From | Axel Lin <axel.lin@ingics.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH] block: blk-flush: Check return value of bio_alloc() |
| Date | 2015-06-21 10:40 +0200 |
| Message-ID | <pDIXg-8iq-1@gated-at.bofh.it> (permalink) |
| Organization | linux.* mail to news gateway |
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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in Please read the FAQ at http://www.tux.org/lkml/
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[PATCH] block: blk-flush: Check return value of bio_alloc() Axel Lin <axel.lin@ingics.com> - 2015-06-21 10:40 +0200
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