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SubjectRe: [syzbot] WARNING in rtnl_dellink
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syzbot suspects this issue was fixed by commit:

commit f123cffdd8fe8ea6c7fded4b88516a42798797d0
Author: Harshit Mogalapalli <harshit.m.mogalapalli@oracle.com>
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=107b5472700000
start commit: cd02217a5d81 Merge tag 'for-linus' of git://git.kernel.org..
git tree: upstream
kernel config: https://syzkaller.appspot.com/x/.config?x=a0437fdd630bee11
dashboard link: https://syzkaller.appspot.com/bug?extid=b3b5c64f4880403edd36
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=116f8172900000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1145d1b1900000

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

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