[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.10' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 74.266192][ T8408] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 74.266202][ T8408] #PF: supervisor instruction fetch in kernel mode
[ 74.266210][ T8408] #PF: error_code(0x0010) - not-present page
[ 74.266217][ T8408] PGD 13b2c067 P4D 13b2c067 PUD 14dfe067 PMD 0
[ 74.266237][ T8408] Oops: 0010 [#1] PREEMPT SMP KASAN
[ 74.266248][ T8408] CPU: 1 PID: 8408 Comm: syz-executor114 Not tainted 5.12.0-rc4-syzkaller #0
[ 74.266262][ T8408] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[ 74.266270][ T8408] RIP: 0010:0x0
[ 74.266283][ T8408] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
[ 74.266289][ T8408] RSP: 0018:ffffc9000102f850 EFLAGS: 00010292
[ 74.266299][ T8408] RAX: 0000000000000007 RBX: 0000000000000000 RCX: 0000000000000007
[ 74.266308][ T8408] RDX: 0000000000000002 RSI: ffff888143c2c000 RDI: ffff888010879000
[ 74.266317][ T8408] RBP: ffff888010879000 R08: 0000000000000000 R09: ffffffff83f62fda
[ 74.266325][ T8408] R10: 0000000000000003 R11: 0000000000000018 R12: ffff888143c2c000
[ 74.266334][ T8408] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000720
[ 74.266342][ T8408] FS: 0000000001cb6300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
[ 74.266357][ T8408] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 74.266366][ T8408] CR2: ffffffffffffffd6 CR3: 000000001463f000 CR4: 00000000001506e0
[ 74.266375][ T8408] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 74.266383][ T8408] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 74.266391][ T8408] Call Trace:
[ 74.266395][ T8408] fbcon_cursor+0x50e/0x620
[ 74.266421][ T8408] hide_cursor+0x85/0x280
[ 74.266435][ T8408] redraw_screen+0x5b4/0x740
[ 74.266447][ T8408] ? wait_for_completion_io+0x270/0x270
[ 74.266466][ T8408] ? csi_J+0xab0/0xab0
[ 74.266479][ T8408] vc_do_resize+0xed8/0x1150
[ 74.266494][ T8408] ? vc_init+0x5a0/0x5a0
[ 74.266506][ T8408] ? __sanitizer_cov_trace_cmp4+0x1c/0x70
[ 74.266524][ T8408] fbcon_set_disp+0x7a8/0xe10
[ 74.266538][ T8408] set_con2fb_map+0x7a6/0xf80
[ 74.266552][ T8408] ? drm_fb_helper_blank+0x250/0x250
[ 74.266567][ T8408] fbcon_set_con2fb_map_ioctl+0x165/0x220
[ 74.266582][ T8408] ? fbcon_get_requirement+0x7a0/0x7a0
[ 74.266597][ T8408] ? __sanitizer_cov_trace_switch+0x63/0xf0
[ 74.266612][ T8408] do_fb_ioctl+0x5b6/0x690
[ 74.266628][ T8408] ? fb_getput_cmap+0x270/0x270
[ 74.266642][ T8408] ? tomoyo_execute_permission+0x4a0/0x4a0
[ 74.266660][ T8408] ? __lock_acquire+0x16b3/0x54c0
[ 74.266678][ T8408] ? __sanitizer_cov_trace_switch+0x63/0xf0
[ 74.266693][ T8408] ? __sanitizer_cov_trace_const_cmp2+0x22/0x80
[ 74.266709][ T8408] ? do_vfs_ioctl+0x27d/0x1090
[ 74.266723][ T8408] ? generic_block_fiemap+0x60/0x60
[ 74.266736][ T8408] ? find_held_lock+0x2d/0x110
[ 74.266750][ T8408] ? __context_tracking_exit+0xb8/0xe0
[ 74.266765][ T8408] ? lock_downgrade+0x6e0/0x6e0
[ 74.266781][ T8408] fb_ioctl+0xe7/0x150
[ 74.266795][ T8408] ? do_fb_ioctl+0x690/0x690
[ 74.266809][ T8408] __x64_sys_ioctl+0x193/0x200
[ 74.266823][ T8408] do_syscall_64+0x2d/0x70
[ 74.266835][ T8408] entry_SYSCALL_64_after_hwframe+0x44/0xae
[ 74.266852][ T8408] RIP: 0033:0x43eed9
[ 74.266860][ T8408] Code: 28 c3 e8 2a 14 00 00 66 2e 0f 1f 84 00 00 00 00 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 73 01 c3 48 c7 c1 c0 ff ff ff f7 d8 64 89 01 48
[ 74.266874][ T8408] RSP: 002b:00007ffcfa968908 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[ 74.266886][ T8408] RAX: ffffffffffffffda RBX: 0000000000400488 RCX: 000000000043eed9
[ 74.266895][ T8408] RDX: 0000000020000080 RSI: 0000000000004610 RDI: 0000000000000004
[ 74.266903][ T8408] RBP: 0000000000402ec0 R08: 0000000000400488 R09: 0000000000400488
[ 74.266911][ T8408] R10: 0000000000400488 R11: 0000000000000246 R12: 0000000000402f50
[ 74.266920][ T8408] R13: 0000000000000000 R14: 00000000004ac018 R15: 0000000000400488
[ 74.266931][ T8408] Modules linked in:
[ 74.266937][ T8408] CR2: 0000000000000000
[ 74.266946][ T8408] ---[ end trace 045379688dc02839 ]---
[ 74.266951][ T8408] RIP: 0010:0x0
[ 74.266960][ T8408] Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
[ 74.266967][ T8408] RSP: 0018:ffffc9000102f850 EFLAGS: 00010292
[ 74.266977][ T8408] RAX: 0000000000000007 RBX: 0000000000000000 RCX: 0000000000000007
[ 74.266985][ T8408] RDX: 0000000000000002 RSI: ffff888143c2c000 RDI: ffff888010879000
[ 74.266993][ T8408] RBP: ffff888010879000 R08: 0000000000000000 R09: ffffffff83f62fda
[ 74.267002][ T8408] R10: 0000000000000003 R11: 0000000000000018 R12: ffff888143c2c000
[ 74.267010][ T8408] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000720
[ 74.267018][ T8408] FS: 0000000001cb6300(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
[ 74.267032][ T8408] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 74.267042][ T8408] CR2: ffffffffffffffd6 CR3: 000000001463f000 CR4: 00000000001506e0
[ 74.267050][ T8408] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 74.267058][ T8408] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 74.267067][ T8408] Kernel panic - not syncing: Fatal exception
[ 74.267976][ T8408] Kernel Offset: disabled
[ 74.762734][ T8408] Rebooting in 86400 seconds..