[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 66.759774][ T27] audit: type=1800 audit(1576532084.281:25): pid=9168 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 66.779933][ T27] audit: type=1800 audit(1576532084.281:26): pid=9168 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 66.807583][ T27] audit: type=1800 audit(1576532084.281:27): pid=9168 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?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 '10.128.0.43' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.897434][ T9320] BUG: unable to handle page fault for address: 000000010000000e [ 76.897442][ T9320] #PF: supervisor write access in kernel mode [ 76.897447][ T9320] #PF: error_code(0x0002) - not-present page [ 76.897457][ T9320] PGD 9793b067 P4D 9793b067 PUD 0 [ 76.897480][ T9320] Oops: 0002 [#1] PREEMPT SMP KASAN [ 76.897492][ T9320] CPU: 1 PID: 9320 Comm: syz-executor815 Not tainted 5.5.0-rc1-syzkaller #0 [ 76.897498][ T9320] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.897519][ T9320] RIP: 0010:insert_char+0x23d/0x400 [ 76.897532][ T9320] Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e 1e 01 00 00 d1 eb 41 0f b7 85 c8 03 00 00 4c 89 ff 89 d9 66 ab 49 8d bd 78 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 [ 76.897538][ T9320] RSP: 0018:ffffc90001dd7858 EFLAGS: 00010202 [ 76.897547][ T9320] RAX: 0000000000000720 RBX: 0000000000000001 RCX: 0000000000000001 [ 76.897553][ T9320] RDX: 1ffff11011e78679 RSI: 000000010000000e RDI: 000000010000000e [ 76.897559][ T9320] RBP: ffffc90001dd78a0 R08: ffff888095018400 R09: ffff888095018c90 [ 76.897567][ T9320] R10: fffffbfff14f3388 R11: ffffffff8a799c47 R12: 0000000000000000 [ 76.897574][ T9320] R13: ffff88808f3c3000 R14: ffff88808f3c3334 R15: 000000010000000e [ 76.897584][ T9320] FS: 00000000021de880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 76.897591][ T9320] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.897598][ T9320] CR2: 000000010000000e CR3: 00000000a91a0000 CR4: 00000000001406e0 [ 76.897608][ T9320] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.897614][ T9320] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.897617][ T9320] Call Trace: [ 76.897635][ T9320] do_con_trol+0x41a6/0x61b0 [ 76.897651][ T9320] ? reset_palette+0x190/0x190 [ 76.897668][ T9320] ? __kasan_check_read+0x11/0x20 [ 76.897685][ T9320] ? __atomic_notifier_call_chain+0xf8/0x1a0 [ 76.897702][ T9320] do_con_write.part.0+0xfd9/0x1ef0 [ 76.897718][ T9320] ? do_con_trol+0x61b0/0x61b0 [ 76.897731][ T9320] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 76.897741][ T9320] ? add_wait_queue+0x112/0x170 [ 76.897750][ T9320] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 76.897763][ T9320] ? trace_hardirqs_on+0x67/0x240 [ 76.897776][ T9320] con_write+0x46/0xd0 [ 76.897789][ T9320] n_tty_write+0x40e/0x1080 [ 76.897804][ T9320] ? n_tty_read+0x1bf0/0x1bf0 [ 76.897813][ T9320] ? prepare_to_wait_exclusive+0x320/0x320 [ 76.897828][ T9320] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 76.897840][ T9320] ? _copy_from_user+0x12c/0x1a0 [ 76.897850][ T9320] tty_write+0x496/0x7f0 [ 76.897860][ T9320] ? n_tty_read+0x1bf0/0x1bf0 [ 76.897874][ T9320] __vfs_write+0x8a/0x110 [ 76.897885][ T9320] ? put_tty_driver+0x20/0x20 [ 76.897898][ T9320] vfs_write+0x268/0x5d0 [ 76.897913][ T9320] ksys_write+0x14f/0x290 [ 76.897926][ T9320] ? __ia32_sys_read+0xb0/0xb0 [ 76.897943][ T9320] ? do_syscall_64+0x26/0x790 [ 76.897956][ T9320] ? entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.897968][ T9320] ? do_syscall_64+0x26/0x790 [ 76.897983][ T9320] __x64_sys_write+0x73/0xb0 [ 76.897997][ T9320] do_syscall_64+0xfa/0x790 [ 76.898011][ T9320] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.898021][ T9320] RIP: 0033:0x4404f9 [ 76.898034][ T9320] 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 5b 14 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 76.898040][ T9320] RSP: 002b:00007ffd7f172088 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 76.898053][ T9320] RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004404f9 [ 76.898060][ T9320] RDX: 0000000000000078 RSI: 0000000020000000 RDI: 0000000000000004 [ 76.898069][ T9320] RBP: 00000000006ca018 R08: 0000000000000000 R09: 00000000004002c8 [ 76.898076][ T9320] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401de0 [ 76.898081][ T9320] R13: 0000000000401e70 R14: 0000000000000000 R15: 0000000000000000 [ 76.898091][ T9320] Modules linked in: [ 76.898103][ T9320] CR2: 000000010000000e [ 76.898812][ T9320] ---[ end trace 609e8edb17a11e0f ]--- [ 76.899160][ T9320] RIP: 0010:insert_char+0x23d/0x400 [ 76.899261][ T9320] Code: 00 fc ff df 48 89 fa 48 c1 ea 03 0f b6 04 02 84 c0 74 08 3c 01 0f 8e 1e 01 00 00 d1 eb 41 0f b7 85 c8 03 00 00 4c 89 ff 89 d9 66 ab 49 8d bd 78 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 [ 76.899268][ T9320] RSP: 0018:ffffc90001dd7858 EFLAGS: 00010202 [ 76.899286][ T9320] RAX: 0000000000000720 RBX: 0000000000000001 RCX: 0000000000000001 [ 76.899294][ T9320] RDX: 1ffff11011e78679 RSI: 000000010000000e RDI: 000000010000000e [ 76.899302][ T9320] RBP: ffffc90001dd78a0 R08: ffff888095018400 R09: ffff888095018c90 [ 76.899310][ T9320] R10: fffffbfff14f3388 R11: ffffffff8a799c47 R12: 0000000000000000 [ 76.899318][ T9320] R13: ffff88808f3c3000 R14: ffff88808f3c3334 R15: 000000010000000e [ 76.899329][ T9320] FS: 00000000021de880(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 76.899337][ T9320] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 76.899345][ T9320] CR2: 000000010000000e CR3: 00000000a91a0000 CR4: 00000000001406e0 [ 76.899356][ T9320] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 76.899363][ T9320] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 76.899370][ T9320] Kernel panic - not syncing: Fatal exception [ 76.900981][ T9320] Kernel Offset: disabled [ 77.437664][ T9320] Rebooting in 86400 seconds..