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ext4: add check to io_submit_init_bio

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The bio_alloc() function can return NULL if the memory allocation
fails.  So we need to check for this.

Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o
2013-06-06 10:18:22 -04:00
parent 5dc23bdd5f
commit a1d8d9a757
1 changed files with 2 additions and 0 deletions
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2
fs/ext4/page-io.c
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@@ -372,6 +372,8 @@ static int io_submit_init_bio(struct ext4_io_submit *io,
struct bio *bio; struct bio *bio;
bio = bio_alloc(GFP_NOIO, min(nvecs, BIO_MAX_PAGES)); bio = bio_alloc(GFP_NOIO, min(nvecs, BIO_MAX_PAGES));
if (!bio)
return -ENOMEM;
bio->bi_sector = bh->b_blocknr * (bh->b_size >> 9); bio->bi_sector = bh->b_blocknr * (bh->b_size >> 9);
bio->bi_bdev = bh->b_bdev; bio->bi_bdev = bh->b_bdev;
bio->bi_end_io = ext4_end_bio; bio->bi_end_io = ext4_end_bio;