* Patch "nvme/core: Fix race kicking freed request_queue" has been added to the 4.9-stable tree
@ 2017-04-06 8:08 gregkh
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From: gregkh @ 2017-04-06 8:08 UTC (permalink / raw)
To: keith.busch, axboe, gregkh, hch, jthumshirn, sagi; +Cc: stable, stable-commits
This is a note to let you know that I've just added the patch titled
nvme/core: Fix race kicking freed request_queue
to the 4.9-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:
nvme-core-fix-race-kicking-freed-request_queue.patch
and it can be found in the queue-4.9 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.
>From f33447b90e96076483525b21cc4e0a8977cdd07c Mon Sep 17 00:00:00 2001
From: Keith Busch <keith.busch@intel.com>
Date: Fri, 10 Feb 2017 18:15:51 -0500
Subject: nvme/core: Fix race kicking freed request_queue
From: Keith Busch <keith.busch@intel.com>
commit f33447b90e96076483525b21cc4e0a8977cdd07c upstream.
If a namespace has already been marked dead, we don't want to kick the
request_queue again since we may have just freed it from another thread.
Signed-off-by: Keith Busch <keith.busch@intel.com>
Reviewed-by: Johannes Thumshirn <jthumshirn@suse.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Sagi Grimberg <sagi@grimberg.me>
Signed-off-by: Jens Axboe <axboe@fb.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/nvme/host/core.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
--- a/drivers/nvme/host/core.c
+++ b/drivers/nvme/host/core.c
@@ -2057,9 +2057,9 @@ void nvme_kill_queues(struct nvme_ctrl *
* Revalidating a dead namespace sets capacity to 0. This will
* end buffered writers dirtying pages that can't be synced.
*/
- if (ns->disk && !test_and_set_bit(NVME_NS_DEAD, &ns->flags))
- revalidate_disk(ns->disk);
-
+ if (!ns->disk || test_and_set_bit(NVME_NS_DEAD, &ns->flags))
+ continue;
+ revalidate_disk(ns->disk);
blk_set_queue_dying(ns->queue);
blk_mq_abort_requeue_list(ns->queue);
blk_mq_start_stopped_hw_queues(ns->queue, true);
Patches currently in stable-queue which might be from keith.busch@intel.com are
queue-4.9/nvme-pci-disable-on-removal-when-disconnected.patch
queue-4.9/nvme-core-fix-race-kicking-freed-request_queue.patch
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2017-04-06 8:08 Patch "nvme/core: Fix race kicking freed request_queue" has been added to the 4.9-stable tree gregkh
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