From: Christoph Hellwig <hch@lst.de>
To: Guixin Liu <kanie@linux.alibaba.com>
Cc: Keith Busch <kbusch@kernel.org>, Jens Axboe <axboe@kernel.dk>,
Christoph Hellwig <hch@lst.de>, Sagi Grimberg <sagi@grimberg.me>,
Nilay Shroff <nilay@linux.ibm.com>,
Daniel Wagner <dwagner@suse.de>, Hannes Reinecke <hare@suse.de>,
linux-nvme@lists.infradead.org
Subject: Re: [PATCH v2] nvmet: Handle a NULL admin queue in nvmet_queue_tls_keyid()
Date: Thu, 29 Oct 2026 13:15:52 +0100 [thread overview]
Message-ID: <20261029121552.GC24375@lst.de> (raw)
In-Reply-To: <20261029034306.3626274-1-kanie@linux.alibaba.com>
On Thu, Oct 29, 2026 at 11:43:06AM +0800, Guixin Liu wrote:
> The admin queue is not necessarily installed when the tls_key debugfs
> entry is read: it may not have been created yet, or it may have been
> destroyed already. nvmet_queue_tls_keyid() then dereferences a NULL
> sq.
>
> Guard the helper and return 0 instead, which also covers the read
> racing with admin queue teardown.
The patch itself looks obviously fine, but do we have any synchronization
that ensure it does not go away while we're looking at the submission
queue?
prev parent reply other threads:[~2026-10-29 12:16 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-29 3:43 [PATCH v2] nvmet: Handle a NULL admin queue in nvmet_queue_tls_keyid() Guixin Liu
2026-10-29 3:50 ` sashiko-bot
2026-10-29 12:15 ` Christoph Hellwig [this message]
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