[ 40.261879] audit: type=1800 audit(1552099505.486:29): pid=7916 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 40.289959] audit: type=1800 audit(1552099505.486:30): pid=7916 uid=0 auid=4294967295 ses=4294967295 subj=system_u:system_r:kernel_t:s0 op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 Starting mcstransd: [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.31' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 49.101451] kauditd_printk_skb: 5 callbacks suppressed [ 49.101468] audit: type=1400 audit(1552099514.326:36): avc: denied { map } for pid=8103 comm="syz-executor066" path="/root/syz-executor066865598" dev="sda1" ino=16483 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:user_home_t:s0 tclass=file permissive=1 [ 49.104887] [drm:drm_calc_timestamping_constants] *ERROR* crtc 31: Can't calculate constants, dotclock = 0! [ 49.144647] WARNING: CPU: 0 PID: 8103 at drivers/gpu/drm/vkms/vkms_crtc.c:40 vkms_vblank_simulate+0x262/0x2c0 [ 49.154863] Kernel panic - not syncing: panic_on_warn set ... [ 49.160763] CPU: 0 PID: 8103 Comm: syz-executor066 Not tainted 5.0.0+ #13 [ 49.167674] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 49.177014] Call Trace: [ 49.179578] [ 49.181717] dump_stack+0x172/0x1f0 [ 49.185330] ? vkms_vblank_simulate+0x1e0/0x2c0 [ 49.189988] panic+0x2cb/0x65c [ 49.193163] ? __warn_printk+0xf3/0xf3 [ 49.197042] ? vkms_vblank_simulate+0x262/0x2c0 [ 49.201870] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.207402] ? __warn.cold+0x5/0x45 [ 49.211017] ? __warn+0xe8/0x1d0 [ 49.214372] ? vkms_vblank_simulate+0x262/0x2c0 [ 49.219030] __warn.cold+0x20/0x45 [ 49.222555] ? vkms_vblank_simulate+0x262/0x2c0 [ 49.227209] report_bug+0x263/0x2b0 [ 49.230825] do_error_trap+0x11b/0x200 [ 49.234786] do_invalid_op+0x37/0x50 [ 49.238486] ? vkms_vblank_simulate+0x262/0x2c0 [ 49.243171] invalid_op+0x14/0x20 [ 49.246637] RIP: 0010:vkms_vblank_simulate+0x262/0x2c0 [ 49.251924] Code: c7 c7 40 07 bc 87 e8 6d 67 bb ff e9 2c fe ff ff e8 93 5e 9b fd 48 8b 45 d0 49 89 86 40 02 00 00 e9 7a ff ff ff e8 7e 5e 9b fd <0f> 0b e9 f4 fe ff ff e8 b2 57 d3 fd e9 34 fe ff ff e8 08 58 d3 fd [ 49.270818] RSP: 0018:ffff8880ae807dd8 EFLAGS: 00010006 [ 49.276183] RAX: ffff888095fdc580 RBX: ffff8880ae825d80 RCX: ffffffff83d4f673 [ 49.283462] RDX: 0000000000010000 RSI: ffffffff83d4f782 RDI: 0000000000000007 [ 49.290723] RBP: ffff8880ae807e08 R08: ffff888095fdc580 R09: ffffffff899a4008 [ 49.297999] R10: ffffffff899a4010 R11: 0000000000000001 R12: 0000000000079b50 [ 49.305291] R13: ffff8882192959c0 R14: 0000000000000000 R15: ffff888219294e98 [ 49.312572] ? vkms_vblank_simulate+0x153/0x2c0 [ 49.317232] ? vkms_vblank_simulate+0x262/0x2c0 [ 49.321887] ? vkms_vblank_simulate+0x262/0x2c0 [ 49.326551] __hrtimer_run_queues+0x33e/0xde0 [ 49.331038] ? vkms_disable_vblank+0x20/0x20 [ 49.335450] ? hrtimer_start_range_ns+0xc80/0xc80 [ 49.340297] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 49.345298] ? ktime_get_update_offsets_now+0x2d9/0x440 [ 49.350655] hrtimer_interrupt+0x314/0x770 [ 49.354885] smp_apic_timer_interrupt+0x120/0x570 [ 49.359817] apic_timer_interrupt+0xf/0x20 [ 49.364041] [ 49.366268] RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 [ 49.371968] Code: 48 c7 c0 30 94 92 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d a2 f0 88 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 9c 0f 44 fa 65 8b 05 e5 49 f8 78 [ 49.390952] RSP: 0018:ffff888097647938 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 49.398662] RAX: 1ffffffff1125286 RBX: 0000000000000282 RCX: 0000000000000000 [ 49.405945] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: 0000000000000282 [ 49.413210] RBP: ffff888097647948 R08: ffff888095fdc580 R09: 0000000000000000 [ 49.420483] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888219294430 [ 49.427737] R13: 0000000000000000 R14: ffff888219294430 R15: ffff88821950c6c8 [ 49.435016] drm_vblank_get+0x150/0x1e0 [ 49.438985] drm_wait_vblank_ioctl+0x4f8/0x17a0 [ 49.443673] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 49.449030] ? lock_downgrade+0x880/0x880 [ 49.453172] ? drm_dev_exit+0x60/0x60 [ 49.456976] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.462524] drm_ioctl_kernel+0x23e/0x2e0 [ 49.466663] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 49.472032] ? drm_setversion+0x8c0/0x8c0 [ 49.476174] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 49.481705] ? _copy_from_user+0xdd/0x150 [ 49.485845] drm_ioctl+0x545/0xa50 [ 49.489378] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 49.494732] ? drm_version+0x3d0/0x3d0 [ 49.498608] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 49.503716] ? debug_check_no_obj_freed+0x200/0x464 [ 49.508728] ? ___might_sleep+0x163/0x280 [ 49.512873] ? drm_version+0x3d0/0x3d0 [ 49.516773] do_vfs_ioctl+0xd6e/0x1390 [ 49.520668] ? ioctl_preallocate+0x210/0x210 [ 49.525174] ? selinux_file_mprotect+0x620/0x620 [ 49.530017] ? kmem_cache_free+0x225/0x260 [ 49.534247] ? putname+0xf4/0x130 [ 49.537686] ? do_sys_open+0x31d/0x5d0 [ 49.541653] ? tomoyo_file_ioctl+0x23/0x30 [ 49.545873] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.551424] ? security_file_ioctl+0x93/0xc0 [ 49.555837] ksys_ioctl+0xab/0xd0 [ 49.559282] __x64_sys_ioctl+0x73/0xb0 [ 49.563161] do_syscall_64+0x103/0x610 [ 49.567042] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.572307] RIP: 0033:0x443ca9 [ 49.575506] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 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 0f 83 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 49.594404] RSP: 002b:00007ffc35935f08 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 49.602104] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443ca9 [ 49.609363] RDX: 0000000020000080 RSI: 00000000c018643a RDI: 0000000000000003 [ 49.616627] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0 [ 49.623885] R10: 000000000000000f R11: 0000000000000246 R12: 00000000004019b0 [ 49.631260] R13: 0000000000401a40 R14: 0000000000000000 R15: 0000000000000000 [ 49.639439] Kernel Offset: disabled [ 49.643133] Rebooting in 86400 seconds..