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| author | Jan Kara <jack@suse.cz> | 2013-12-03 11:20:06 +0100 |
|---|---|---|
| committer | Jan Kara <jack@suse.cz> | 2013-12-04 12:26:51 +0100 |
| commit | df4e7ac0bb70abc97fbfd9ef09671fc084b3f9db (patch) | |
| tree | 6ef8a1afad4806126e1e8533d27be4b4340db982 /fs/ext2 | |
| parent | dea4f48a0a301b23c65af8e4fe8ccf360c272fbf (diff) | |
| download | linux-stable-df4e7ac0bb70abc97fbfd9ef09671fc084b3f9db.tar.gz linux-stable-df4e7ac0bb70abc97fbfd9ef09671fc084b3f9db.tar.bz2 linux-stable-df4e7ac0bb70abc97fbfd9ef09671fc084b3f9db.zip | |
ext2: Fix oops in ext2_get_block() called from ext2_quota_write()
ext2_quota_write() doesn't properly setup bh it passes to
ext2_get_block() and thus we hit assertion BUG_ON(maxblocks == 0) in
ext2_get_blocks() (or we could actually ask for mapping arbitrary number
of blocks depending on whatever value was on stack).
Fix ext2_quota_write() to properly fill in number of blocks to map.
CC: stable@vger.kernel.org # >= 2.6.12
Reviewed-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reported-by: Christoph Hellwig <hch@infradead.org>
Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext2')
| -rw-r--r-- | fs/ext2/super.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/ext2/super.c b/fs/ext2/super.c index 288534920fe5..20d6697bd638 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -1493,6 +1493,7 @@ static ssize_t ext2_quota_write(struct super_block *sb, int type, sb->s_blocksize - offset : towrite; tmp_bh.b_state = 0; + tmp_bh.b_size = sb->s_blocksize; err = ext2_get_block(inode, blk, &tmp_bh, 1); if (err < 0) goto out; |