WARNING in exception_type

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=13507adeb00000
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=ba0f4a8a9b058f16e3da
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)

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+ba0f4a...@syzkaller.appspotmail.com

------------[ cut here ]------------
WARNING: CPU: 1 PID: 15091 at arch/x86/kvm/x86.c:392 exception_type.cold+0x11/0x1e arch/x86/kvm/x86.c:392
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 15091 Comm: syz-executor.4 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
panic+0x26a/0x50e kernel/panic.c:186
__warn.cold+0x20/0x5a kernel/panic.c:541
report_bug+0x262/0x2b0 lib/bug.c:183
fixup_bug arch/x86/kernel/traps.c:178 [inline]
fixup_bug arch/x86/kernel/traps.c:173 [inline]
do_error_trap+0x1d7/0x310 arch/x86/kernel/traps.c:296
invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:1038
RIP: 0010:exception_type.cold+0x11/0x1e arch/x86/kvm/x86.c:392
Code: 70 f9 89 ee 48 c7 c7 40 23 62 88 41 83 cc ff e8 d2 e1 01 00 e9 20 c2 18 f9 e8 5d b0 70 f9 48 c7 c7 a0 23 62 88 e8 bc e1 01 00 <0f> 0b 41 bd 03 00 00 00 e9 6d c5 18 f9 e8 3f b0 70 f9 48 c7 c7 a0
RSP: 0018:ffff88805150f9f0 EFLAGS: 00010282
RAX: 0000000000000024 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000018e34 RSI: ffffffff814dff01 RDI: ffffed100a2a1f30
RBP: ffff88805150fbb0 R08: 0000000000000024 R09: 0000000000000000
R10: 0000000000000005 R11: 0000000000000000 R12: 00000000000000d0
R13: ffff8880569e8400 R14: 0000000000000000 R15: dffffc0000000000
inject_pending_event arch/x86/kvm/x86.c:7186 [inline]
vcpu_enter_guest arch/x86/kvm/x86.c:7691 [inline]
vcpu_run arch/x86/kvm/x86.c:7920 [inline]
kvm_arch_vcpu_ioctl_run+0x1d97/0x6f70 arch/x86/kvm/x86.c:8120
kvm_vcpu_ioctl+0x493/0xe10 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2847
vfs_ioctl fs/ioctl.c:46 [inline]
file_ioctl fs/ioctl.c:501 [inline]
do_vfs_ioctl+0xcdb/0x12e0 fs/ioctl.c:688
ksys_ioctl+0x9b/0xc0 fs/ioctl.c:705
__do_sys_ioctl fs/ioctl.c:712 [inline]
__se_sys_ioctl fs/ioctl.c:710 [inline]
__x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:710
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fbfeecf1ae9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fbfec267188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fbfeee04f60 RCX: 00007fbfeecf1ae9
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 00007fbfeed4bf6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffdbe24a2df R14: 00007fbfec267300 R15: 0000000000022000
Kernel Offset: disabled
Rebooting in 86400 seconds..


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[syzbot]

Auto-closing this bug as obsolete.
Crashes did not happen for a while, no reproducer and no activity.