kasan: CONFIG_KASAN_INLINE enabled kasan: GPF could be caused by NULL-ptr deref or user memory access general protection fault: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 23986 Comm: syz-executor1 Not tainted 4.20.0-rc2+ #115 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:kvm_pv_send_ipi+0x364/0xdd0 arch/x86/kvm/lapic.c:579 Code: 45 84 ed 0f 84 da 07 00 00 e8 38 52 66 00 48 8d 4b 14 48 b8 00 00 00 00 00 fc ff df 48 89 ca 48 89 8d 70 fe ff ff 48 c1 ea 03 <0f> b6 14 02 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 f5 kobject: 'kvm' (0000000097ae409b): kobject_uevent_env RSP: 0018:ffff888180da6ed8 EFLAGS: 00010203 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000014 RDX: 0000000000000002 RSI: ffffffff811935a8 RDI: 0000000000000005 RBP: ffff888180da7078 R08: ffff88817f0e0040 R09: ffffed103b5e5b67 R10: ffffed103b5e5b67 R11: ffff8881daf2db3b R12: ffff888180da7050 R13: 0000000000000001 R14: 0000000000000000 R15: ffff888180da6fd0 FS: 00007f93035e0700(0000) GS:ffff8881daf00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 kobject: 'kvm' (0000000097ae409b): fill_kobj_path: path = '/devices/virtual/misc/kvm' CR2: 0000001b30921000 CR3: 00000001c8cb5000 CR4: 00000000001426e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: kobject: 'loop5' (00000000c58d0889): kobject_uevent_env kobject: 'loop5' (00000000c58d0889): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'kvm' (0000000097ae409b): kobject_uevent_env kobject: 'kvm' (0000000097ae409b): kobject_uevent_env kobject: 'kvm' (0000000097ae409b): fill_kobj_path: path = '/devices/virtual/misc/kvm' kvm_emulate_hypercall+0xa1a/0xf20 arch/x86/kvm/x86.c:6999 kobject: 'kvm' (0000000097ae409b): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000097ae409b): kobject_uevent_env kobject: 'kvm' (0000000097ae409b): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000097ae409b): kobject_uevent_env handle_vmcall+0x15/0x20 arch/x86/kvm/vmx.c:7510 kobject: 'kvm' (0000000097ae409b): kobject_uevent_env vmx_handle_exit+0x33d/0x4630 arch/x86/kvm/vmx.c:10600 kobject: 'kvm' (0000000097ae409b): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000097ae409b): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'kvm' (0000000097ae409b): kobject_uevent_env kobject: 'kvm' (0000000097ae409b): fill_kobj_path: path = '/devices/virtual/misc/kvm' kobject: 'loop5' (00000000c58d0889): kobject_uevent_env kobject: 'loop5' (00000000c58d0889): fill_kobj_path: path = '/devices/virtual/block/loop5' kobject: 'loop4' (0000000050394d5f): kobject_uevent_env kobject: 'loop4' (0000000050394d5f): fill_kobj_path: path = '/devices/virtual/block/loop4' vcpu_enter_guest arch/x86/kvm/x86.c:7809 [inline] vcpu_run arch/x86/kvm/x86.c:7872 [inline] kvm_arch_vcpu_ioctl_run+0x3ded/0x72a0 arch/x86/kvm/x86.c:8072 ------------[ cut here ]------------ downgrading a read lock WARNING: CPU: 0 PID: 23996 at kernel/locking/lockdep.c:3556 __lock_downgrade kernel/locking/lockdep.c:3556 [inline] WARNING: CPU: 0 PID: 23996 at kernel/locking/lockdep.c:3556 lock_downgrade+0x4d7/0x900 kernel/locking/lockdep.c:3819