Re: [syzbot] [kvm-x86?] [kvm?] WARNING: locking bug in kvm_xen_set_evtchn_fast

From: syzbot

Date: Sun Aug 09 2026 - 07:34:21 EST


Hello,

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

Reported-by: syzbot+919877893c9d28162dc2@xxxxxxxxxxxxxxxxxxxxxxxxx
Tested-by: syzbot+919877893c9d28162dc2@xxxxxxxxxxxxxxxxxxxxxxxxx

Tested on:

commit: 230abd62 KVM: pfncache: Use a dedicated SRCU domain in..
git tree: git://git.infradead.org/users/dwmw2/linux.git xen-rcu-fixed
console output: https://syzkaller.appspot.com/x/log.txt?x=110522c6580000
kernel config: https://syzkaller.appspot.com/x/.config?x=9cef045500682f6b
dashboard link: https://syzkaller.appspot.com/bug?extid=919877893c9d28162dc2
compiler: Debian clang version 22.1.8 (++20260613092233+e80beda6e255-1~exp1~20260613092250.77), Debian LLD 22.1.8

Note: no patches were applied.
Note: testing is done by a robot and is best-effort only.