3.5.7.29 -stable review patch. If anyone has any objections, please let me know.
------------------ From: Jan Kara <[email protected]> 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" <[email protected]> Reviewed-by: Christoph Hellwig <[email protected]> Reported-by: Christoph Hellwig <[email protected]> Signed-off-by: Jan Kara <[email protected]> Signed-off-by: Luis Henriques <[email protected]> --- fs/ext2/super.c | 1 + 1 file changed, 1 insertion(+) diff --git a/fs/ext2/super.c b/fs/ext2/super.c index b3621cb..74f4688 100644 --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -1449,6 +1449,7 @@ 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; -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
