diff options
| author | Jing Zhang <zj.barak@gmail.com> | 2010-05-30 22:49:44 -0400 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2010-08-02 10:21:17 -0700 |
| commit | caf4fd5d6a45bf7f1db7a966354207475b212322 (patch) | |
| tree | e93ff13d42c13c33d90b1117dfc4cb89795eba92 /fs | |
| parent | ee02586911929717c8a1ff47d0b447c615da0b70 (diff) | |
ext4: fix memory leaks in error path handling of ext4_ext_zeroout()
commit b720303df7352d4a7a1f61e467e0a124913c0d41 upstream (as of v2.6.34-git13)
When EIO occurs after bio is submitted, there is no memory free
operation for bio, which results in memory leakage. And there is also
no check against bio_alloc() for bio.
Acked-by: Dave Kleikamp <shaggy@linux.vnet.ibm.com>
Signed-off-by: Jing Zhang <zj.barak@gmail.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'fs')
| -rw-r--r-- | fs/ext4/extents.c | 15 |
1 files changed, 8 insertions, 7 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 4378941b4958..f4844edba4a8 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -2446,7 +2446,7 @@ static void bi_complete(struct bio *bio, int error) /* FIXME!! we need to try to merge to left or right after zero-out */ static int ext4_ext_zeroout(struct inode *inode, struct ext4_extent *ex) { - int ret = -EIO; + int ret; struct bio *bio; int blkbits, blocksize; sector_t ee_pblock; @@ -2470,6 +2470,9 @@ static int ext4_ext_zeroout(struct inode *inode, struct ext4_extent *ex) len = ee_len; bio = bio_alloc(GFP_NOIO, len); + if (!bio) + return -ENOMEM; + bio->bi_sector = ee_pblock; bio->bi_bdev = inode->i_sb->s_bdev; @@ -2497,17 +2500,15 @@ static int ext4_ext_zeroout(struct inode *inode, struct ext4_extent *ex) submit_bio(WRITE, bio); wait_for_completion(&event); - if (test_bit(BIO_UPTODATE, &bio->bi_flags)) - ret = 0; - else { - ret = -EIO; - break; + if (!test_bit(BIO_UPTODATE, &bio->bi_flags)) { + bio_put(bio); + return -EIO; } bio_put(bio); ee_len -= done; ee_pblock += done << (blkbits - 9); } - return ret; + return 0; } #define EXT4_EXT_ZERO_LEN 7 |