Re: [PATCH] libceph: fix use after free

[Sergei Shtylyov]

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@xxxxxxx>
[...]

MBR, Sergei