Re: KASAN: use-after-free Read in rds_find_bound

From: Dmitry Vyukov
Date: Wed Feb 14 2018 - 12:53:26 EST


On Wed, Feb 14, 2018 at 6:35 PM, Santosh Shilimkar
<santosh.shilimkar@xxxxxxxxxx> wrote:
>>>> Hi Santosh,
>>>>
>>>> What is that fix? You forgot to provide any link/reference. I also
>>>> don't see any patches from you at around that date...
>>>>
>>> Fix [1] was later not added since there was a still a race. Wanted to
>>> see if the issue re-appears after recent netns fix [2].
>>
>>
>>
>> We will not see if the bug re-appears or not until this bug is closed.
>> Please see this recent discussion about another rds bug:
>> https://groups.google.com/d/msg/syzkaller-bugs/3XjmOzr5jRU/g7pXIsY1BgAJ
>> In the current state syzbot will never report bugs in these functions
>> again.
>>
> OK. Can you close that one then in that case ?

Anybody can do this:

#syz fix: rds: tcp: use rds_destroy_pending() to synchronize
netns/module teardown and rds connection/workq management

syzbot provides full self-service, see first email and in particular this:
https://github.com/google/syzkaller/blob/master/docs/syzbot.md#communication-with-syzbot

Thanks