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ext4: add check to io_submit_init_bio
author
Theodore Ts'o
<tytso@mit.edu>
Thu, 6 Jun 2013 14:18:22 +0000
(10:18 -0400)
committer
Theodore Ts'o
<tytso@mit.edu>
Thu, 6 Jun 2013 14:18:22 +0000
(10:18 -0400)
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>
fs/ext4/page-io.c
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diff --git
a/fs/ext4/page-io.c
b/fs/ext4/page-io.c
index
ce8c15a
..
48786cd
100644
(file)
--- a/
fs/ext4/page-io.c
+++ b/
fs/ext4/page-io.c
@@
-372,6
+372,8
@@
static int io_submit_init_bio(struct ext4_io_submit *io,
struct bio *bio;
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_bdev = bh->b_bdev;
bio->bi_end_io = ext4_end_bio;