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
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