[dm-devel] [PATCH 2/2] dm: Avoid use-after-free of a mapped device

[Bart Van Assche]

On 02/22/13 12:08, Mike Snitzer wrote:
> On Fri, Feb 22 2013 at  5:47am -0500,
> Bart Van Assche <bvanassche at acm.org> wrote:
>
>> As the comment above rq_completed() explains, md members must
>> not be touched after the dm_put() at the end of that function
>> has been invoked. Avoid that the md->queue can be run
>> asynchronously after the last md reference has been dropped by
>> running that queue synchronously.
>
> Your commit header should probably reference commit
> a8c32a5c98943d370ea606a2e7dc04717eb92206 ("dm: fix deadlock with request
> based dm and queue request_fn recursion") and cc: stable with "v3.7+"
> guidance.
>
> Acked-by: Mike Snitzer <snitzer at redhat.com>

Hello Mike,

Thanks for reviewing this patch and for the ack. Regarding the stable 
tag: had you noticed that commit a8c32a5 had a "Cc: stable" tag itself 
and hence probably has already been backported to kernels older than v3.7 ?

Bart.