This is a note to let you know that I've just added the patch titled
nvme-rdma: do not try to stop unallocated queues
to the 5.15-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-rdma-do-not-try-to-stop-unallocated-queues.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 3820c4fdc247b6f0a4162733bdb8ddf8f2e8a1e4 Mon Sep 17 00:00:00 2001
From: Maurizio Lombardi <mlombard@xxxxxxxxxx>
Date: Mon, 31 Jul 2023 12:37:58 +0200
Subject: nvme-rdma: do not try to stop unallocated queues
From: Maurizio Lombardi <mlombard@xxxxxxxxxx>
commit 3820c4fdc247b6f0a4162733bdb8ddf8f2e8a1e4 upstream.
Trying to stop a queue which hasn't been allocated will result
in a warning due to calling mutex_lock() against an uninitialized mutex.
DEBUG_LOCKS_WARN_ON(lock->magic != lock)
WARNING: CPU: 4 PID: 104150 at kernel/locking/mutex.c:579
Call trace:
RIP: 0010:__mutex_lock+0x1173/0x14a0
nvme_rdma_stop_queue+0x1b/0xa0 [nvme_rdma]
nvme_rdma_teardown_io_queues.part.0+0xb0/0x1d0 [nvme_rdma]
nvme_rdma_delete_ctrl+0x50/0x100 [nvme_rdma]
nvme_do_delete_ctrl+0x149/0x158 [nvme_core]
Signed-off-by: Maurizio Lombardi <mlombard@xxxxxxxxxx>
Reviewed-by: Sagi Grimberg <sagi@xxxxxxxxxxx>
Tested-by: Yi Zhang <yi.zhang@xxxxxxxxxx>
Signed-off-by: Keith Busch <kbusch@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/nvme/host/rdma.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/nvme/host/rdma.c
+++ b/drivers/nvme/host/rdma.c
@@ -645,6 +645,9 @@ static void __nvme_rdma_stop_queue(struc
static void nvme_rdma_stop_queue(struct nvme_rdma_queue *queue)
{
+ if (!test_bit(NVME_RDMA_Q_ALLOCATED, &queue->flags))
+ return;
+
mutex_lock(&queue->queue_lock);
if (test_and_clear_bit(NVME_RDMA_Q_LIVE, &queue->flags))
__nvme_rdma_stop_queue(queue);
Patches currently in stable-queue which might be from mlombard@xxxxxxxxxx are
queue-5.15/nvme-rdma-do-not-try-to-stop-unallocated-queues.patch
