tree 6ef8a1afad4806126e1e8533d27be4b4340db982
parent dea4f48a0a301b23c65af8e4fe8ccf360c272fbf
author Jan Kara <jack@suse.cz> 1386066006 +0100
committer Jan Kara <jack@suse.cz> 1386156411 +0100

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>