Groups > linux.kernel > #1572026

Re: [PATCH] block: queue lock must be acquired when iterating over rls

From	Jens Axboe <axboe@kernel.dk>
Newsgroups	linux.kernel
Subject	Re: [PATCH] block: queue lock must be acquired when iterating over rls
Date	2017-02-01 23:40 +0100
Message-ID	<t6bJf-3KV-13@gated-at.bofh.it> (permalink)
References	<t5WKd-2n7-7@gated-at.bofh.it>
Organization	linux.* mail to news gateway

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On 01/31/2017 10:36 PM, Tahsin Erdogan wrote:
> blk_set_queue_dying() does not acquire queue lock before it calls
> blk_queue_for_each_rl(). This allows a racing blkg_destroy() to
> remove blkg->q_node from the linked list and have
> blk_queue_for_each_rl() loop infitely over the removed blkg->q_node
> list node.

Thanks, applied.

-- 
Jens Axboe

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[PATCH] block: queue lock must be acquired when iterating over rls Tahsin Erdogan <tahsin@google.com> - 2017-02-01 07:40 +0100
  Re: [PATCH] block: queue lock must be acquired when iterating over  rls Jens Axboe <axboe@kernel.dk> - 2017-02-01 23:40 +0100

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