[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.119' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 69.356937][ T8397] L1TF CPU bug present and SMT on, data leak possible. See CVE-2018-3646 and https://www.kernel.org/doc/html/latest/admin-guide/hw-vuln/l1tf.html for details. executing program [ 69.399055][ T8397] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. [ 69.464398][ T8403] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. executing program executing program [ 69.558787][ T8408] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. executing program [ 69.615439][ T8414] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. executing program [ 69.684343][ T8420] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. executing program [ 69.754701][ T8426] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. executing program [ 69.824789][ T8432] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. [ 69.894392][ T8438] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. executing program [ 69.989681][ T8445] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. executing program executing program [ 70.074437][ T8451] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 74.425065][ T8895] set_target_expiration: 90 callbacks suppressed [ 74.425083][ T8895] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. executing program [ 74.504073][ T8900] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. [ 74.563686][ T8906] kvm: vcpu 0: requested lapic timer restore with starting count register 0x390=4241646265 (4241646265 ns) > initial count (296265111 ns). Using initial count to start timer. [ 74.581384][ C0] ------------[ cut here ]------------ [ 74.581418][ C0] WARNING: CPU: 0 PID: 8906 at drivers/gpu/drm/vkms/vkms_crtc.c:21 vkms_vblank_simulate+0x31e/0x3b0 [ 74.581476][ C0] Modules linked in: [ 74.581499][ C0] CPU: 0 PID: 8906 Comm: syz-executor121 Not tainted 5.11.0-rc6-next-20210204-syzkaller #0 [ 74.581523][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.581538][ C0] RIP: 0010:vkms_vblank_simulate+0x31e/0x3b0 [ 74.581565][ C0] Code: 85 9e 00 00 00 48 8b 95 b8 01 00 00 4c 89 e1 bf 02 00 00 00 48 c7 c6 40 3e d6 89 e8 0c af ef ff e9 e5 fe ff ff e8 32 9d 28 fd <0f> 0b e9 88 fd ff ff e8 26 4b 6c fd e9 11 fe ff ff 4c 89 ef e8 19 [ 74.581588][ C0] RSP: 0018:ffffc90000007de8 EFLAGS: 00010046 [ 74.581610][ C0] RAX: 0000000080010001 RBX: ffff888018755e58 RCX: 0000000000000000 [ 74.581627][ C0] RDX: ffff888026868000 RSI: ffffffff844a4d8e RDI: 0000000000000003 [ 74.581644][ C0] RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000 [ 74.581659][ C0] R10: ffffffff844a4b13 R11: 0000000000000000 R12: ffff888018754d30 [ 74.581676][ C0] R13: 0000000000fe4c00 R14: ffff8880b9c26340 R15: ffffffff844a4a70 [ 74.581694][ C0] FS: 00000000004ec300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 74.581719][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.581737][ C0] CR2: 00000000004b20f0 CR3: 00000000267de000 CR4: 00000000001526f0 [ 74.581754][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.581769][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.581786][ C0] Call Trace: [ 74.581793][ C0] [ 74.581808][ C0] ? vkms_disable_vblank+0x20/0x20 [ 74.581832][ C0] __hrtimer_run_queues+0x609/0xe40 [ 74.581869][ C0] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 74.581896][ C0] ? ktime_get_update_offsets_now+0x268/0x340 [ 74.581935][ C0] hrtimer_interrupt+0x334/0x940 [ 74.581978][ C0] __sysvec_apic_timer_interrupt+0x146/0x540 [ 74.582011][ C0] asm_call_irq_on_stack+0xf/0x20 [ 74.582048][ C0] [ 74.582056][ C0] sysvec_apic_timer_interrupt+0xbd/0x100 [ 74.582086][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 74.582114][ C0] RIP: 0010:console_unlock+0x7b6/0xbb0 [ 74.582143][ C0] Code: 40 e4 e7 8b e8 cb 97 fd ff e8 c6 3d 00 00 31 ff 4c 89 ee e8 dc e3 17 00 4d 85 ed 0f 85 3a 02 00 00 e8 de db 17 00 ff 34 24 9d <8b> 5c 24 34 31 ff 89 de e8 4d e3 17 00 85 db 0f 84 eb f9 ff ff e8 [ 74.582164][ C0] RSP: 0018:ffffc900027b7738 EFLAGS: 00000293 [ 74.582186][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 74.582201][ C0] RDX: ffff888026868000 RSI: ffffffff815b0ee2 RDI: 0000000000000000 [ 74.582217][ C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8faa5827 [ 74.582232][ C0] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff84af9530 [ 74.582248][ C0] R13: 0000000000000200 R14: dffffc0000000000 R15: ffffc900027b7798 [ 74.582269][ C0] ? netconsole_netdev_event+0x340/0x340 [ 74.582303][ C0] ? console_unlock+0x7b2/0xbb0 [ 74.582344][ C0] ? devkmsg_read+0x740/0x740 [ 74.582374][ C0] ? lock_release+0x710/0x710 [ 74.582414][ C0] ? vprintk_func+0x8d/0x1e0 [ 74.582449][ C0] vprintk_emit+0x189/0x490 [ 74.582481][ C0] vprintk_func+0x8d/0x1e0 [ 74.582520][ C0] printk+0xba/0xed [ 74.582545][ C0] ? record_print_text.cold+0x16/0x16 [ 74.582576][ C0] ? lockdep_hardirqs_on+0x79/0x100 [ 74.582602][ C0] ? _raw_spin_unlock_irqrestore+0x2f/0x50 [ 74.582629][ C0] ? ___ratelimit+0x21c/0x460 [ 74.582659][ C0] set_target_expiration.cold+0xf0/0x160 [ 74.582693][ C0] ? __sanitizer_cov_trace_cmp1+0x22/0x80 [ 74.582726][ C0] kvm_apic_set_state+0x96f/0xcb0 [ 74.582761][ C0] kvm_arch_vcpu_ioctl+0xc27/0x2d30 [ 74.582797][ C0] ? kvm_arch_vcpu_put+0x530/0x530 [ 74.582833][ C0] ? lock_release+0x710/0x710 [ 74.582857][ C0] ? find_held_lock+0x2d/0x110 [ 74.582898][ C0] ? __mutex_lock+0x61b/0x1110 [ 74.582925][ C0] ? kvm_vcpu_ioctl+0x175/0xd90 [ 74.582955][ C0] ? tomoyo_path_number_perm+0x24e/0x590 [ 74.582985][ C0] ? mutex_lock_io_nested+0xf60/0xf60 [ 74.583008][ C0] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 74.583047][ C0] ? fd_install+0x1e3/0x640 [ 74.583082][ C0] kvm_vcpu_ioctl+0x7b9/0xd90 [ 74.583113][ C0] ? kvm_io_bus_write+0x280/0x280 [ 74.583143][ C0] ? generic_block_fiemap+0x60/0x60 [ 74.583175][ C0] ? kvm_dev_ioctl+0xdd/0x13a0 [ 74.583209][ C0] ? kvm_put_kvm+0xb10/0xb10 [ 74.583243][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 74.583272][ C0] ? kvm_io_bus_write+0x280/0x280 [ 74.583303][ C0] __x64_sys_ioctl+0x193/0x200 [ 74.583333][ C0] do_syscall_64+0x2d/0x70 [ 74.583357][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.583385][ C0] RIP: 0033:0x444239 [ 74.583406][ C0] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 [ 74.583429][ C0] RSP: 002b:00007ffc4dd6e828 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 74.583454][ C0] RAX: ffffffffffffffda RBX: 00000000000122f1 RCX: 0000000000444239 [ 74.583472][ C0] RDX: 0000000020000580 RSI: 000000004400ae8f RDI: 0000000000000006 [ 74.583497][ C0] RBP: 0000000000000000 R08: 00007ffc4dd6e9c8 R09: 00007ffc4dd6e9c8 [ 74.583513][ C0] R10: 00007ffc4dd6e9c8 R11: 0000000000000246 R12: 00007ffc4dd6e83c [ 74.583530][ C0] R13: 431bde82d7b634db R14: 00000000004b2018 R15: 00000000004004a0 [ 74.583569][ C0] Kernel panic - not syncing: panic_on_warn set ... [ 74.583580][ C0] CPU: 0 PID: 8906 Comm: syz-executor121 Not tainted 5.11.0-rc6-next-20210204-syzkaller #0 [ 74.583605][ C0] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 74.583618][ C0] Call Trace: [ 74.583626][ C0] [ 74.583635][ C0] dump_stack+0x107/0x163 [ 74.583664][ C0] panic+0x306/0x73d [ 74.583691][ C0] ? __warn_printk+0xf3/0xf3 [ 74.583729][ C0] ? __warn.cold+0x1a/0x44 [ 74.583758][ C0] ? vkms_vblank_simulate+0x31e/0x3b0 [ 74.583783][ C0] __warn.cold+0x35/0x44 [ 74.583808][ C0] ? vkms_vblank_simulate+0x31e/0x3b0 [ 74.583834][ C0] report_bug+0x1bd/0x210 [ 74.583865][ C0] handle_bug+0x3c/0x60 [ 74.583887][ C0] exc_invalid_op+0x14/0x40 [ 74.583910][ C0] asm_exc_invalid_op+0x12/0x20 [ 74.583936][ C0] RIP: 0010:vkms_vblank_simulate+0x31e/0x3b0 [ 74.583962][ C0] Code: 85 9e 00 00 00 48 8b 95 b8 01 00 00 4c 89 e1 bf 02 00 00 00 48 c7 c6 40 3e d6 89 e8 0c af ef ff e9 e5 fe ff ff e8 32 9d 28 fd <0f> 0b e9 88 fd ff ff e8 26 4b 6c fd e9 11 fe ff ff 4c 89 ef e8 19 [ 74.583982][ C0] RSP: 0018:ffffc90000007de8 EFLAGS: 00010046 [ 74.584003][ C0] RAX: 0000000080010001 RBX: ffff888018755e58 RCX: 0000000000000000 [ 74.584019][ C0] RDX: ffff888026868000 RSI: ffffffff844a4d8e RDI: 0000000000000003 [ 74.584035][ C0] RBP: 0000000000000002 R08: 0000000000000001 R09: 0000000000000000 [ 74.584050][ C0] R10: ffffffff844a4b13 R11: 0000000000000000 R12: ffff888018754d30 [ 74.584067][ C0] R13: 0000000000fe4c00 R14: ffff8880b9c26340 R15: ffffffff844a4a70 [ 74.584084][ C0] ? vkms_disable_vblank+0x20/0x20 [ 74.584114][ C0] ? vkms_vblank_simulate+0xa3/0x3b0 [ 74.584141][ C0] ? vkms_vblank_simulate+0x31e/0x3b0 [ 74.584171][ C0] ? vkms_vblank_simulate+0x31e/0x3b0 [ 74.584199][ C0] ? vkms_disable_vblank+0x20/0x20 [ 74.584222][ C0] __hrtimer_run_queues+0x609/0xe40 [ 74.584258][ C0] ? hrtimer_sleeper_start_expires+0x80/0x80 [ 74.584284][ C0] ? ktime_get_update_offsets_now+0x268/0x340 [ 74.584322][ C0] hrtimer_interrupt+0x334/0x940 [ 74.584366][ C0] __sysvec_apic_timer_interrupt+0x146/0x540 [ 74.584398][ C0] asm_call_irq_on_stack+0xf/0x20 [ 74.584423][ C0] [ 74.584431][ C0] sysvec_apic_timer_interrupt+0xbd/0x100 [ 74.584457][ C0] asm_sysvec_apic_timer_interrupt+0x12/0x20 [ 74.584492][ C0] RIP: 0010:console_unlock+0x7b6/0xbb0 [ 74.584519][ C0] Code: 40 e4 e7 8b e8 cb 97 fd ff e8 c6 3d 00 00 31 ff 4c 89 ee e8 dc e3 17 00 4d 85 ed 0f 85 3a 02 00 00 e8 de db 17 00 ff 34 24 9d <8b> 5c 24 34 31 ff 89 de e8 4d e3 17 00 85 db 0f 84 eb f9 ff ff e8 [ 74.584538][ C0] RSP: 0018:ffffc900027b7738 EFLAGS: 00000293 [ 74.584558][ C0] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 74.584572][ C0] RDX: ffff888026868000 RSI: ffffffff815b0ee2 RDI: 0000000000000000 [ 74.584587][ C0] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffffff8faa5827 [ 74.584600][ C0] R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff84af9530 [ 74.584614][ C0] R13: 0000000000000200 R14: dffffc0000000000 R15: ffffc900027b7798 [ 74.584632][ C0] ? netconsole_netdev_event+0x340/0x340 [ 74.584663][ C0] ? console_unlock+0x7b2/0xbb0 [ 74.584701][ C0] ? devkmsg_read+0x740/0x740 [ 74.584731][ C0] ? lock_release+0x710/0x710 [ 74.584767][ C0] ? vprintk_func+0x8d/0x1e0 [ 74.584802][ C0] vprintk_emit+0x189/0x490 [ 74.584833][ C0] vprintk_func+0x8d/0x1e0 [ 74.584861][ C0] printk+0xba/0xed [ 74.584883][ C0] ? record_print_text.cold+0x16/0x16 [ 74.584913][ C0] ? lockdep_hardirqs_on+0x79/0x100 [ 74.584939][ C0] ? _raw_spin_unlock_irqrestore+0x2f/0x50 [ 74.584966][ C0] ? ___ratelimit+0x21c/0x460 [ 74.584995][ C0] set_target_expiration.cold+0xf0/0x160 [ 74.585027][ C0] ? __sanitizer_cov_trace_cmp1+0x22/0x80 [ 74.585058][ C0] kvm_apic_set_state+0x96f/0xcb0 [ 74.585091][ C0] kvm_arch_vcpu_ioctl+0xc27/0x2d30 [ 74.585123][ C0] ? kvm_arch_vcpu_put+0x530/0x530 [ 74.585159][ C0] ? lock_release+0x710/0x710 [ 74.585180][ C0] ? find_held_lock+0x2d/0x110 [ 74.585220][ C0] ? __mutex_lock+0x61b/0x1110 [ 74.585246][ C0] ? kvm_vcpu_ioctl+0x175/0xd90 [ 74.585274][ C0] ? tomoyo_path_number_perm+0x24e/0x590 [ 74.585305][ C0] ? mutex_lock_io_nested+0xf60/0xf60 [ 74.585328][ C0] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 74.585365][ C0] ? fd_install+0x1e3/0x640 [ 74.585397][ C0] kvm_vcpu_ioctl+0x7b9/0xd90 [ 74.585426][ C0] ? kvm_io_bus_write+0x280/0x280 [ 74.585456][ C0] ? generic_block_fiemap+0x60/0x60 [ 74.585495][ C0] ? kvm_dev_ioctl+0xdd/0x13a0 [ 74.585527][ C0] ? kvm_put_kvm+0xb10/0xb10 [ 74.585560][ C0] ? __sanitizer_cov_trace_const_cmp4+0x1c/0x70 [ 74.585589][ C0] ? kvm_io_bus_write+0x280/0x280 [ 74.585621][ C0] __x64_sys_ioctl+0x193/0x200 [ 74.585651][ C0] do_syscall_64+0x2d/0x70 [ 74.585674][ C0] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.585703][ C0] RIP: 0033:0x444239 [ 74.585723][ C0] Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 90 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 c0 ff ff ff f7 d8 64 89 01 48 [ 74.585745][ C0] RSP: 002b:00007ffc4dd6e828 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 74.585771][ C0] RAX: ffffffffffffffda RBX: 00000000000122f1 RCX: 0000000000444239 [ 74.585788][ C0] RDX: 0000000020000580 RSI: 000000004400ae8f RDI: 0000000000000006 [ 74.585804][ C0] RBP: 0000000000000000 R08: 00007ffc4dd6e9c8 R09: 00007ffc4dd6e9c8 [ 74.585821][ C0] R10: 00007ffc4dd6e9c8 R11: 0000000000000246 R12: 00007ffc4dd6e83c [ 74.585837][ C0] R13: 431bde82d7b634db R14: 00000000004b2018 R15: 00000000004004a0 [ 74.586620][ C0] Kernel Offset: disabled [ 75.666626][ C0] Rebooting in 86400 seconds..