This is a note to let you know that I've just added the patch titled
Btrfs: fix crash on endio of reading corrupted block
to the 3.14-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:
btrfs-fix-crash-on-endio-of-reading-corrupted-block.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 38c1c2e44bacb37efd68b90b3f70386a8ee370ee Mon Sep 17 00:00:00 2001
From: Liu Bo <bo.li.liu@xxxxxxxxxx>
Date: Tue, 19 Aug 2014 23:33:13 +0800
Subject: Btrfs: fix crash on endio of reading corrupted block
From: Liu Bo <bo.li.liu@xxxxxxxxxx>
commit 38c1c2e44bacb37efd68b90b3f70386a8ee370ee upstream.
The crash is
------------[ cut here ]------------
kernel BUG at fs/btrfs/extent_io.c:2124!
[...]
Workqueue: btrfs-endio normal_work_helper [btrfs]
RIP: 0010:[<ffffffffa02d6055>] [<ffffffffa02d6055>] end_bio_extent_readpage+0xb45/0xcd0 [btrfs]
This is in fact a regression.
It is because we forgot to increase @offset properly in reading corrupted block,
so that the @offset remains, and this leads to checksum errors while reading
left blocks queued up in the same bio, and then ends up with hiting the above
BUG_ON.
Reported-by: Chris Murphy <lists@xxxxxxxxxxxxxxxxx>
Signed-off-by: Liu Bo <bo.li.liu@xxxxxxxxxx>
Signed-off-by: Chris Mason <clm@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
fs/btrfs/extent_io.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2525,6 +2525,7 @@ static void end_bio_extent_readpage(stru
test_bit(BIO_UPTODATE, &bio->bi_flags);
if (err)
uptodate = 0;
+ offset += len;
continue;
}
}
Patches currently in stable-queue which might be from bo.li.liu@xxxxxxxxxx are
queue-3.14/btrfs-fix-crash-on-endio-of-reading-corrupted-block.patch
queue-3.14/btrfs-fix-compressed-write-corruption-on-enospc.patch
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