[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]
Message-Id: <20140903220626.346231505@linuxfoundation.org>
Date: Wed, 3 Sep 2014 15:07:26 -0700
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Chris Murphy <lists@...orremedies.com>,
Liu Bo <bo.li.liu@...cle.com>, Chris Mason <clm@...com>
Subject: [PATCH 3.16 089/125] Btrfs: fix crash on endio of reading corrupted block
3.16-stable review patch. If anyone has any objections, please let me know.
------------------
From: Liu Bo <bo.li.liu@...cle.com>
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@...orremedies.com>
Signed-off-by: Liu Bo <bo.li.liu@...cle.com>
Signed-off-by: Chris Mason <clm@...com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
fs/btrfs/extent_io.c | 1 +
1 file changed, 1 insertion(+)
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -2532,6 +2532,7 @@ static void end_bio_extent_readpage(stru
test_bit(BIO_UPTODATE, &bio->bi_flags);
if (err)
uptodate = 0;
+ offset += len;
continue;
}
}
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists