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| author | Jan Kara <jack@suse.cz> | 2013-12-03 10:20:06 (GMT) |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-09 20:25:13 (GMT) |
| commit | 681203c68b4ebdc6f0f67c4f8ab031752817f6dc (patch) | |
| tree | 7df31835a41a1e4db1a3506ca0346855c8046f4d /fs | |
| parent | e123196f24da85f70d64fb65e506166a3387b2dc (diff) | |
| download | linux-fsl-qoriq-681203c68b4ebdc6f0f67c4f8ab031752817f6dc.tar.xz | |
ext2: Fix oops in ext2_get_block() called from ext2_quota_write()
commit df4e7ac0bb70abc97fbfd9ef09671fc084b3f9db upstream.
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.
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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'fs')
| -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 2885349..20d6697 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; |