On Tue, 21 Dec 2021 at 21:03, syzbot
[off-list ref] wrote:

syzbot suspects this issue was fixed by commit:

commit f123cffdd8fe8ea6c7fded4b88516a42798797d0
Author: Harshit Mogalapalli [off-list ref]
Date:   Mon Nov 29 17:53:27 2021 +0000

    net: netlink: af_netlink: Prevent empty skb by adding a check on len.

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=168acc95b00000
start commit:   990f227371a4 Merge tag 's390-5.9-2' of git://git.kernel.or..
git tree:       upstream
kernel config:  https://syzkaller.appspot.com/x/.config?x=21f0d1d2df6d5fc
dashboard link: https://syzkaller.appspot.com/bug?extid=830c6dbfc71edc4f0b8f
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=101761e2900000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: net: netlink: af_netlink: Prevent empty skb by adding a check on len.

For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Looks reasonable, let's close the bug:

#syz fix:
net: netlink: af_netlink: Prevent empty skb by adding a check on len.