Re: UBSan: Undefined Behavior in vrefcnt

[syzbot <syzbot+b584943ad1f8ab9d4fe0%syzkaller.appspotmail.com@localhost>]

Hello,

syzbot has tested the proposed patch and the reproducer did not trigger any issue:

Reported-and-tested-by: syzbot+b584943ad1f8ab9d4fe0%syzkaller.appspotmail.com@localhost

Tested on:

commit:         0caacf7b aarch64: Implement __aarch64_casN_sync.
git tree:       https://github.com/NetBSD/src trunk
console output: https://syzkaller.appspot.com/x/log.txt?x=1544303e080000
kernel config:  https://syzkaller.appspot.com/x/.config?x=1420f906d33d9f1f
dashboard link: https://syzkaller.appspot.com/bug?extid=b584943ad1f8ab9d4fe0
compiler:       g++ (Debian 10.2.1-6) 10.2.1 20210110
patch:          https://syzkaller.appspot.com/x/patch.diff?x=1722d761080000

Note: testing is done by a robot and is best-effort only.

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