Re: [syzbot] upstream boot error: WARNING in netlink_ack

[Kees Cook]

On October 4, 2022 1:33:30 AM PDT, Dmitry Vyukov <dvyukov@xxxxxxxxxx> wrote:
>On Tue, 4 Oct 2022 at 10:27, syzbot
><syzbot+3a080099974c271cd7e9@xxxxxxxxxxxxxxxxxxxxxxxxx> wrote:
>>
>> Hello,
>>
>> syzbot found the following issue on:
>>
>> HEAD commit:    725737e7c21d Merge tag 'statx-dioalign-for-linus' of git:/..
>> git tree:       upstream
>> console output: https://syzkaller.appspot.com/x/log.txt?x=10257034880000
>> kernel config:  https://syzkaller.appspot.com/x/.config?x=486af5e221f55835
>> dashboard link: https://syzkaller.appspot.com/bug?extid=3a080099974c271cd7e9
>> compiler:       gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
>>
>> IMPORTANT: if you fix the issue, please add the following tag to the commit:
>> Reported-by: syzbot+3a080099974c271cd7e9@xxxxxxxxxxxxxxxxxxxxxxxxx
>
>+linux-hardening
>
>> ------------[ cut here ]------------
>> memcpy: detected field-spanning write (size 28) of single field "&errmsg->msg" at net/netlink/af_netlink.c:2447 (size 16)

This is fixed in the pending netdev tree coming for the merge window.

-- 
Kees Cook