[ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Getty on tty1. [ OK ] Started Serial Getty on ttyS0. [ 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 '10.128.10.1' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 66.796884][ T8503] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 66.808729][ T8503] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 66.817126][ T8503] CPU: 1 PID: 8503 Comm: syz-executor619 Not tainted 5.10.0-rc3-next-20201116-syzkaller #0 [ 66.827072][ T8503] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.837127][ T8503] RIP: 0010:drm_atomic_set_crtc_for_connector+0x426/0x5f0 [ 66.844212][ T8503] Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e a6 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 8b 4d 28 <80> 38 00 0f 85 83 01 00 00 48 8b 2c 25 00 00 00 00 48 b8 00 00 00 [ 66.863792][ T8503] RSP: 0018:ffffc900018bf938 EFLAGS: 00010246 [ 66.869837][ T8503] RAX: dffffc0000000000 RBX: ffff8880116b0100 RCX: 0000000000000022 [ 66.877785][ T8503] RDX: 1ffff11003019a66 RSI: ffffffff84302d10 RDI: ffff8880180cd330 [ 66.885733][ T8503] RBP: 0000000000000000 R08: ffff888018051900 R09: ffff8880180cd343 [ 66.893695][ T8503] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801a024800 [ 66.901783][ T8503] R13: ffff8880180cd308 R14: ffff8880116b0108 R15: ffff88801cd1b700 [ 66.909748][ T8503] FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 66.918653][ T8503] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 66.925216][ T8503] CR2: 00000000006cf0a0 CR3: 000000000b08e000 CR4: 00000000001506e0 [ 66.933312][ T8503] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 66.941258][ T8503] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 66.949200][ T8503] Call Trace: [ 66.952479][ T8503] __drm_atomic_helper_set_config+0x72a/0xe80 [ 66.958524][ T8503] ? rcu_read_lock_sched_held+0x3a/0x70 [ 66.964044][ T8503] ? drm_atomic_nonblocking_commit+0x120/0x120 [ 66.970171][ T8503] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 66.976043][ T8503] drm_client_modeset_commit_atomic+0x527/0x7c0 [ 66.982262][ T8503] ? kmalloc_array.constprop.0+0x20/0x20 [ 66.987870][ T8503] ? lockdep_hardirqs_on+0x79/0x100 [ 66.993052][ T8503] ? drm_fb_helper_lastclose+0x170/0x170 [ 66.998659][ T8503] drm_client_modeset_commit_locked+0x145/0x580 [ 67.004893][ T8503] ? drm_fb_helper_lastclose+0x170/0x170 [ 67.010513][ T8503] drm_client_modeset_commit+0x4d/0x80 [ 67.015967][ T8503] drm_fbdev_client_restore+0xe3/0x1a0 [ 67.021429][ T8503] drm_client_dev_restore+0x17f/0x270 [ 67.026782][ T8503] ? __drm_dbg+0xa8/0x150 [ 67.031086][ T8503] drm_release+0x441/0x530 [ 67.035537][ T8503] __fput+0x283/0x920 [ 67.039501][ T8503] ? drm_release_noglobal+0x180/0x180 [ 67.044848][ T8503] task_work_run+0xdd/0x190 [ 67.049330][ T8503] do_exit+0xb9b/0x29f0 [ 67.053463][ T8503] ? mm_update_next_owner+0x7a0/0x7a0 [ 67.058810][ T8503] ? vmacache_update+0xce/0x140 [ 67.063638][ T8503] do_group_exit+0x125/0x310 [ 67.068205][ T8503] __x64_sys_exit_group+0x3a/0x50 [ 67.073221][ T8503] do_syscall_64+0x2d/0x70 [ 67.077617][ T8503] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.083484][ T8503] RIP: 0033:0x443b18 [ 67.087363][ T8503] Code: Unable to access opcode bytes at RIP 0x443aee. [ 67.094195][ T8503] RSP: 002b:00007fff6ec2d738 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 67.102603][ T8503] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443b18 [ 67.110623][ T8503] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 67.118578][ T8503] RBP: 00000000004c34f0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 67.126565][ T8503] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 67.134519][ T8503] R13: 00000000006d5180 R14: 0000000000000000 R15: 0000000000000000 [ 67.142513][ T8503] Modules linked in: [ 67.183527][ T8503] ---[ end trace f24317b9689e8a7a ]--- [ 67.189090][ T8503] RIP: 0010:drm_atomic_set_crtc_for_connector+0x426/0x5f0 [ 67.196758][ T8503] Code: 00 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 03 0f 8e a6 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 8b 4d 28 <80> 38 00 0f 85 83 01 00 00 48 8b 2c 25 00 00 00 00 48 b8 00 00 00 [ 67.216487][ T8503] RSP: 0018:ffffc900018bf938 EFLAGS: 00010246 [ 67.222604][ T8503] RAX: dffffc0000000000 RBX: ffff8880116b0100 RCX: 0000000000000022 [ 67.230574][ T8503] RDX: 1ffff11003019a66 RSI: ffffffff84302d10 RDI: ffff8880180cd330 [ 67.238580][ T8503] RBP: 0000000000000000 R08: ffff888018051900 R09: ffff8880180cd343 [ 67.246592][ T8503] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88801a024800 [ 67.254597][ T8503] R13: ffff8880180cd308 R14: ffff8880116b0108 R15: ffff88801cd1b700 [ 67.262611][ T8503] FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 [ 67.271770][ T8503] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.278358][ T8503] CR2: 000055ee32e491f8 CR3: 0000000018634000 CR4: 00000000001506e0 [ 67.286384][ T8503] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.294723][ T8503] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.302946][ T8503] Kernel panic - not syncing: Fatal exception [ 67.309602][ T8503] Kernel Offset: disabled [ 67.313923][ T8503] Rebooting in 86400 seconds..