This is a note to let you know that I've just added the patch titled
md/raid10: Fix memory leak when raid10 reshape completes.
to the 3.16-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:
md-raid10-fix-memory-leak-when-raid10-reshape-completes.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From b39685526f46976bcd13aa08c82480092befa46c Mon Sep 17 00:00:00 2001
From: NeilBrown <neilb@xxxxxxx>
Date: Mon, 18 Aug 2014 13:59:50 +1000
Subject: md/raid10: Fix memory leak when raid10 reshape completes.
From: NeilBrown <neilb@xxxxxxx>
commit b39685526f46976bcd13aa08c82480092befa46c upstream.
When a raid10 commences a resync/recovery/reshape it allocates
some buffer space.
When a resync/recovery completes the buffer space is freed. But not
when the reshape completes.
This can result in a small memory leak.
There is a subtle side-effect of this bug. When a RAID10 is reshaped
to a larger array (more devices), the reshape is immediately followed
by a "resync" of the new space. This "resync" will use the buffer
space which was allocated for "reshape". This can cause problems
including a "BUG" in the SCSI layer. So this is suitable for -stable.
Fixes: 3ea7daa5d7fde47cd41f4d56c2deb949114da9d6
Signed-off-by: NeilBrown <neilb@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/raid10.c | 1 +
1 file changed, 1 insertion(+)
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -2953,6 +2953,7 @@ static sector_t sync_request(struct mdde
*/
if (test_bit(MD_RECOVERY_RESHAPE, &mddev->recovery)) {
end_reshape(conf);
+ close_sync(conf);
return 0;
}
Patches currently in stable-queue which might be from neilb@xxxxxxx are
queue-3.16/md-raid10-fix-memory-leak-when-reshaping-a-raid10.patch
queue-3.16/md-raid6-avoid-data-corruption-during-recovery-of-double-degraded-raid6.patch
queue-3.16/md-raid1-raid10-always-abort-recover-on-write-error.patch
queue-3.16/md-raid10-fix-memory-leak-when-raid10-reshape-completes.patch
queue-3.16/md-raid5-avoid-livelock-caused-by-non-aligned-writes.patch
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