This is a note to let you know that I've just added the patch titled
dm-raid: fix a race condition in request handling
to the 4.13-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:
dm-raid-fix-a-race-condition-in-request-handling.patch
and it can be found in the queue-4.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From c4d6a1b8e8ea79c439a4871cba540443c9eb13b9 Mon Sep 17 00:00:00 2001
From: Shaohua Li <shli@xxxxxx>
Date: Thu, 21 Sep 2017 10:29:22 -0700
Subject: dm-raid: fix a race condition in request handling
From: Shaohua Li <shli@xxxxxx>
commit c4d6a1b8e8ea79c439a4871cba540443c9eb13b9 upstream.
raid_map calls pers->make_request, which missed the suspend check. Fix it with
the new md_handle_request API.
Fix: cc27b0c78c79(md: fix deadlock between mddev_suspend() and md_write_start())
Cc: Heinz Mauelshagen <heinzm@xxxxxxxxxx>
Cc: Mike Snitzer <snitzer@xxxxxxxxxx>
Reviewed-by: NeilBrown <neilb@xxxxxxxx>
Signed-off-by: Shaohua Li <shli@xxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/md/dm-raid.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -3238,7 +3238,7 @@ static int raid_map(struct dm_target *ti
if (unlikely(bio_end_sector(bio) > mddev->array_sectors))
return DM_MAPIO_REQUEUE;
- mddev->pers->make_request(mddev, bio);
+ md_handle_request(mddev, bio);
return DM_MAPIO_SUBMITTED;
}
Patches currently in stable-queue which might be from shli@xxxxxx are
queue-4.13/md-raid5-preserve-stripe_on_unplug_list-in-break_stripe_batch_list.patch
queue-4.13/dm-raid-fix-a-race-condition-in-request-handling.patch
queue-4.13/md-raid5-fix-a-race-condition-in-stripe-batch.patch