On Mon, May 17, 2021 at 01:27:49PM +0200, Peter Zijlstra wrote: > On Mon, May 17, 2021 at 03:56:22AM -0700, syzbot wrote: > > Hello, > > > > syzbot found the following issue on: > > > > HEAD commit: 18a3c5f7 Merge tag 'for_linus' of git://git.kernel.org/pub.. > > git tree: git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux.git fixes > > console output: https://syzkaller.appspot.com/x/log.txt?x=1662c153d00000 > > kernel config: https://syzkaller.appspot.com/x/.config?x=b8ac1fe5995f69d7 > > dashboard link: https://syzkaller.appspot.com/bug?extid=0fb24f56fa707081e4f2 > > userspace arch: riscv64 > > > > Unfortunately, I don't have any reproducer for this issue yet. > > > > IMPORTANT: if you fix the issue, please add the following tag to the commit: > > Reported-by: syzbot+0fb24f56fa707081e4f2@xxxxxxxxxxxxxxxxxxxxxxxxx > > > > ------------[ cut here ]------------ > > WARNING: CPU: 1 PID: 8643 at kernel/events/core.c:2781 __perf_install_in_context+0x1c0/0x47c kernel/events/core.c:2781 > > Modules linked in: > > CPU: 1 PID: 8643 Comm: syz-executor.0 Not tainted 5.12.0-rc8-syzkaller-00011-g18a3c5f7abfd #0 > > Hardware name: riscv-virtio,qemu (DT) > > How serious should I take this thing? ARM64 and x86_64 don't show these > errors. I think I've seen this in the past on arm64, but very rarely, and never with a consistent reproducer. I'm currently fuyzzing v5.13-rc1, and haven't hit anything like this after ~5 days. Thanks, Mark.
