From: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
To: Pan Bian <bianpan2016@163.com>, Ilya Dryomov <idryomov@gmail.com>,
"Yan, Zheng" <zyan@redhat.com>, Sage Weil <sage@redhat.com>,
"David S. Miller" <davem@davemloft.net>
Cc: ceph-devel@vger.kernel.org, netdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] libceph: fix use after free
Date: Tue, 27 Nov 2018 11:47:56 +0300 [thread overview]
Message-ID: <54c1bcc5-6df5-ba24-2774-98f6333c57b3@cogentembedded.com> (raw)
In-Reply-To: <1543302127-14435-1-git-send-email-bianpan2016@163.com>
Hello!
On 27.11.2018 10:02, Pan Bian wrote:
> The function ceph_monc_handle_map calls kfree(old) to free the old
> monitor map, old points to monc->monmap. However, after that, it reads
> monc->monmap->epoch and passes it to __ceph_monc_got_map. This result in
> a use-after-free bug. The patch moves the free operation after the call
> to __ceph_monc_got_map.
>
> Fixes: 82dcabad750("libceph: revamp subs code, switch to SUBSCRIBE2
Space needed before (.
> protocol")
Never break up the commit summary in this tag.
> Signed-off-by: Pan Bian <bianpan2016@163.com>
[...]
MBR, Sergei
next prev parent reply other threads:[~2018-11-27 8:48 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-11-27 7:02 [PATCH] libceph: fix use after free Pan Bian
2018-11-27 8:47 ` Sergei Shtylyov [this message]
2018-11-27 9:09 ` PanBian
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