bisecting fixing commit since 050272a0423e68207fd2367831ae610680129062
building syzkaller on e3ecea2e7fc6b80cc715c596105f4cf890e7e2e6
testing commit 050272a0423e68207fd2367831ae610680129062 with gcc (GCC) 8.1.0
kernel signature: 5f4eb66cc026c4cb88e15a864b48b80ac3dac080853311b75ded9006c1335266
all runs: crashed: WARNING in kvm_arch_vcpu_ioctl_run
testing current HEAD 4f68020fef1c6cf1b680ffb6481ac41379283ea3
testing commit 4f68020fef1c6cf1b680ffb6481ac41379283ea3 with gcc (GCC) 8.1.0
kernel signature: 29580e059f1fe41db42c3fdb477add76e763d2a7fc1345ab26e77ce07904a95e
all runs: crashed: WARNING in kvm_arch_vcpu_ioctl_run
revisions tested: 2, total time: 23m55.495314696s (build: 17m16.32820902s, test: 6m12.522483591s)
the crash still happens on HEAD
commit msg: Linux 4.14.182
crash: WARNING in kvm_arch_vcpu_ioctl_run
batman_adv: batadv0: Interface activated: batadv_slave_1
IPv6: ADDRCONF(NETDEV_CHANGE): batadv_slave_1: link becomes ready
IPv6: ADDRCONF(NETDEV_CHANGE): veth1_to_batadv: link becomes ready
------------[ cut here ]------------
WARNING: CPU: 1 PID: 8194 at arch/x86/kvm/x86.c:7541 kvm_arch_vcpu_ioctl_run+0xca/0xeb0 arch/x86/kvm/x86.c:7541
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 8194 Comm: syz-executor.0 Not tainted 4.14.182-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:17 [inline]
 dump_stack+0xf7/0x13b lib/dump_stack.c:58
 panic+0x1b0/0x358 kernel/panic.c:183
 __warn.cold.8+0x25/0x2c kernel/panic.c:547
 report_bug+0x1a4/0x1f3 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:177 [inline]
 do_error_trap+0x1bd/0x310 arch/x86/kernel/traps.c:295
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:314
 invalid_op+0x1b/0x40 arch/x86/entry/entry_64.S:964
RIP: 0010:kvm_arch_vcpu_ioctl_run+0xca/0xeb0 arch/x86/kvm/x86.c:7541
RSP: 0018:ffff888082ef7b38 EFLAGS: 00010202
RAX: 0000000000000000 RBX: ffff88808c002000 RCX: 0000000000000000
RDX: 1ffff11012434165 RSI: 0000000000000000 RDI: 0000000000000001
RBP: ffff888082ef7bb0 R08: ffff88808b4d6c28 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: ffff88808bb71d80
R13: ffff8880921a09d8 R14: ffff8880921a0d1c R15: ffff8880921a0900
 kvm_vcpu_ioctl+0x45e/0xb60 arch/x86/kvm/../../../virt/kvm/kvm_main.c:2661
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:500 [inline]
 do_vfs_ioctl+0x180/0xfb0 fs/ioctl.c:684
 SYSC_ioctl fs/ioctl.c:701 [inline]
 SyS_ioctl+0x74/0x80 fs/ioctl.c:692
 do_syscall_64+0x1c7/0x5b0 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x45c829
RSP: 002b:00007f7a079cdc78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00000000004e7ac0 RCX: 000000000045c829
RDX: 0000000000000000 RSI: 000000000000ae80 RDI: 0000000000000005
RBP: 000000000078bfa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff
R13: 00000000000003c0 R14: 00000000004c6499 R15: 00007f7a079ce6d4
Kernel Offset: disabled
Rebooting in 86400 seconds..