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

[Eric Dumazet]

On 02/05/2019 07:28 PM, Dmitry Vyukov wrote:
> On Wed, Jan 30, 2019 at 10:02 PM syzbot
> <syzbot+fb065bc06d3d4054be6f@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>>
>> Hello,
>>
>> syzbot found the following crash on:
>>
>> HEAD commit:    62967898789d Merge git://git.kernel.org/pub/scm/linux/kern..
>> git tree:       upstream
>> console output: https://syzkaller.appspot.com/x/log.txt?x=10f0bf08c00000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=4fceea9e2d99ac20
>> dashboard link: https://syzkaller.appspot.com/bug?extid=fb065bc06d3d4054be6f
>> compiler:       gcc (GCC) 9.0.0 20181231 (experimental)
>>
>> Unfortunately, I don't have any reproducer for this crash yet.
>>
>> IMPORTANT: if you fix the bug, please add the following tag to the commit:
>> Reported-by: syzbot+fb065bc06d3d4054be6f@xxxxxxxxxxxxxxxxxxxxxxxxx
> 
> I assume this is also fixed by:
> 
> #syz fix: mISDN: fix a race in dev_expire_timer()

Yes this looks very probable, thanks.