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Groups > linux.kernel > #1586495
| From | David Miller <davem@davemloft.net> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH v2] net/dccp: fix use after free in tw_timer_handler() |
| Date | 2017-02-22 22:20 +0100 |
| Message-ID | <tdMun-7Lo-31@gated-at.bofh.it> (permalink) |
| References | <tdhgS-252-9@gated-at.bofh.it> <tdMun-7Lo-33@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: Andrey Ryabinin <aryabinin@virtuozzo.com>
Date: Wed, 22 Feb 2017 12:35:27 +0300
> DCCP doesn't purge timewait sockets on network namespace shutdown.
> So, after net namespace destroyed we could still have an active timer
> which will trigger use after free in tw_timer_handler():
...
> Add .exit_batch hook to dccp_v4_ops()/dccp_v6_ops() which will purge
> timewait sockets on net namespace destruction and prevent above issue.
>
> Fixes: f2bf415cfed7 ("mib: add net to NET_ADD_STATS_BH")
> Reported-by: Dmitry Vyukov <dvyukov@google.com>
> Signed-off-by: Andrey Ryabinin <aryabinin@virtuozzo.com>
> Acked-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Applied and queued up for -sable, thanks.
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Re: [PATCH v2] net/dccp: fix use after free in tw_timer_handler() David Miller <davem@davemloft.net> - 2017-02-22 22:20 +0100
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