This is a note to let you know that I've just added the patch titled ext2: Fix oops in ext2_get_block() called from ext2_quota_write() to the 3.12-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ext2-fix-oops-in-ext2_get_block-called-from-ext2_quota_write.patch and it can be found in the queue-3.12 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From df4e7ac0bb70abc97fbfd9ef09671fc084b3f9db Mon Sep 17 00:00:00 2001 From: Jan Kara <jack@xxxxxxx> Date: Tue, 3 Dec 2013 11:20:06 +0100 Subject: ext2: Fix oops in ext2_get_block() called from ext2_quota_write() From: Jan Kara <jack@xxxxxxx> 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@xxxxxxx> Reviewed-by: Christoph Hellwig <hch@xxxxxx> Reported-by: Christoph Hellwig <hch@xxxxxxxxxxxxx> Signed-off-by: Jan Kara <jack@xxxxxxx> Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- fs/ext2/super.c | 1 + 1 file changed, 1 insertion(+) --- a/fs/ext2/super.c +++ b/fs/ext2/super.c @@ -1493,6 +1493,7 @@ static ssize_t ext2_quota_write(struct s 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; Patches currently in stable-queue which might be from jack@xxxxxxx are queue-3.12/ext4-fix-deadlock-when-writing-in-enospc-conditions.patch queue-3.12/ext4-call-ext4_error_inode-if-jbd2_journal_dirty_metadata-fails.patch queue-3.12/ext4-do-not-reserve-clusters-when-fs-doesn-t-support-extents.patch queue-3.12/ext2-fix-oops-in-ext2_get_block-called-from-ext2_quota_write.patch -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html