[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.35' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 66.895658][ T8503] general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN [ 66.907518][ T8503] KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] [ 66.916031][ T8503] CPU: 0 PID: 8503 Comm: syz-executor858 Not tainted 5.10.0-rc3-next-20201116-syzkaller #0 [ 66.926009][ T8503] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.936196][ T8503] RIP: 0010:drm_atomic_set_crtc_for_connector+0x426/0x5f0 [ 66.943306][ 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 [ 66.962968][ T8503] RSP: 0018:ffffc90001b6f938 EFLAGS: 00010246 [ 66.969020][ T8503] RAX: dffffc0000000000 RBX: ffff88801197e600 RCX: 0000000000000022 [ 66.976975][ T8503] RDX: 1ffff11028709a66 RSI: ffffffff84302d10 RDI: ffff88814384d330 [ 66.985064][ T8503] RBP: 0000000000000000 R08: ffff888017869f40 R09: ffff88814384d343 [ 66.993081][ T8503] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888011623800 [ 67.001037][ T8503] R13: ffff88814384d308 R14: ffff88801197e608 R15: ffff888020815f00 [ 67.008992][ T8503] FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 67.017916][ T8503] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.024486][ T8503] CR2: 00000000006cf0a0 CR3: 000000000b08e000 CR4: 00000000001506f0 [ 67.032548][ T8503] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.040513][ T8503] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.048472][ T8503] Call Trace: [ 67.051781][ T8503] __drm_atomic_helper_set_config+0x72a/0xe80 [ 67.057841][ T8503] ? rcu_read_lock_sched_held+0x3a/0x70 [ 67.063373][ T8503] ? drm_atomic_nonblocking_commit+0x120/0x120 [ 67.069520][ T8503] ? __sanitizer_cov_trace_switch+0x45/0x70 [ 67.075423][ T8503] drm_client_modeset_commit_atomic+0x527/0x7c0 [ 67.081663][ T8503] ? kmalloc_array.constprop.0+0x20/0x20 [ 67.087344][ T8503] ? lockdep_hardirqs_on+0x79/0x100 [ 67.092536][ T8503] ? drm_fb_helper_lastclose+0x170/0x170 [ 67.098309][ T8503] drm_client_modeset_commit_locked+0x145/0x580 [ 67.104547][ T8503] ? drm_fb_helper_lastclose+0x170/0x170 [ 67.110172][ T8503] drm_client_modeset_commit+0x4d/0x80 [ 67.115635][ T8503] drm_fbdev_client_restore+0xe3/0x1a0 [ 67.121079][ T8503] drm_client_dev_restore+0x17f/0x270 [ 67.126430][ T8503] ? __drm_dbg+0xa8/0x150 [ 67.130759][ T8503] drm_release+0x441/0x530 [ 67.135157][ T8503] __fput+0x283/0x920 [ 67.139136][ T8503] ? drm_release_noglobal+0x180/0x180 [ 67.144512][ T8503] task_work_run+0xdd/0x190 [ 67.149000][ T8503] do_exit+0xb9b/0x29f0 [ 67.153138][ T8503] ? mm_update_next_owner+0x7a0/0x7a0 [ 67.158492][ T8503] ? vmacache_update+0xce/0x140 [ 67.163339][ T8503] do_group_exit+0x125/0x310 [ 67.167932][ T8503] __x64_sys_exit_group+0x3a/0x50 [ 67.173026][ T8503] do_syscall_64+0x2d/0x70 [ 67.177442][ T8503] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 67.183325][ T8503] RIP: 0033:0x443b18 [ 67.187202][ T8503] Code: Unable to access opcode bytes at RIP 0x443aee. [ 67.194031][ T8503] RSP: 002b:00007ffde0297968 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 [ 67.202438][ T8503] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443b18 [ 67.210448][ T8503] RDX: 0000000000000000 RSI: 000000000000003c RDI: 0000000000000000 [ 67.218412][ T8503] RBP: 00000000004c34f0 R08: 00000000000000e7 R09: ffffffffffffffd0 [ 67.226513][ T8503] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 [ 67.234476][ T8503] R13: 00000000006d5180 R14: 0000000000000000 R15: 0000000000000000 [ 67.242548][ T8503] Modules linked in: [ 67.246925][ T8503] ---[ end trace b36f10ec4a9a06d0 ]--- [ 67.252402][ T8503] RIP: 0010:drm_atomic_set_crtc_for_connector+0x426/0x5f0 [ 67.259577][ 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 [ 67.279241][ T8503] RSP: 0018:ffffc90001b6f938 EFLAGS: 00010246 [ 67.285432][ T8503] RAX: dffffc0000000000 RBX: ffff88801197e600 RCX: 0000000000000022 [ 67.293409][ T8503] RDX: 1ffff11028709a66 RSI: ffffffff84302d10 RDI: ffff88814384d330 [ 67.301535][ T8503] RBP: 0000000000000000 R08: ffff888017869f40 R09: ffff88814384d343 [ 67.309576][ T8503] R10: 0000000000000000 R11: 0000000000000000 R12: ffff888011623800 [ 67.317640][ T8503] R13: ffff88814384d308 R14: ffff88801197e608 R15: ffff888020815f00 [ 67.325668][ T8503] FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 67.334680][ T8503] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 67.341276][ T8503] CR2: 00000000006cf0a0 CR3: 000000000b08e000 CR4: 00000000001506f0 [ 67.349387][ T8503] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 67.357437][ T8503] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 67.365670][ T8503] Kernel panic - not syncing: Fatal exception [ 67.372349][ T8503] Kernel Offset: disabled [ 67.376668][ T8503] Rebooting in 86400 seconds..