Starting getty on tty2-tty6 if dbus and logind are not available... Starting OpenBSD Secure Shell server... [ OK ] Started Regular background program processing daemon. Starting System Logging Service... [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. [ OK ] Started Permit User Sessions. [ OK ] Started System Logging Service. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ 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... 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 '10.128.0.162' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 71.833881][ T28] audit: type=1400 audit(1597009291.182:8): avc: denied { execmem } for pid=6865 comm="syz-executor030" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 71.856619][ T6872] BUG: kernel NULL pointer dereference, address: 0000000000000000 [ 71.865308][ T6872] #PF: supervisor instruction fetch in kernel mode [ 71.872340][ T6872] #PF: error_code(0x0010) - not-present page executing program executing program executing program executing program executing program executing program [ 71.878316][ T6872] PGD 92464067 P4D 92464067 PUD 99b35067 PMD 0 [ 71.885435][ T6872] Oops: 0010 [#1] PREEMPT SMP KASAN [ 71.890643][ T6872] CPU: 1 PID: 6872 Comm: io_wqe_worker-0 Not tainted 5.8.0-syzkaller #0 [ 71.898974][ T6872] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 71.910779][ T6872] RIP: 0010:0x0 [ 71.914248][ T6872] Code: Bad RIP value. [ 71.918494][ T6872] RSP: 0018:ffffc90005277910 EFLAGS: 00010246 [ 71.925036][ T6872] RAX: 1ffffffff10b0b9b RBX: dffffc0000000000 RCX: ffff88809e7d7a48 executing program executing program executing program executing program executing program [ 71.933485][ T6872] RDX: 00000000000000a3 RSI: 0000000020000240 RDI: ffff888092b48500 [ 71.941847][ T6872] RBP: 0000000020000240 R08: ffffc90005277a28 R09: ffff88809edd990f [ 71.951131][ T6872] R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90005277a28 [ 71.959214][ T6872] R13: ffffffff88585cc0 R14: 00000000000000a3 R15: 0000000000000001 [ 71.967201][ T6872] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 71.976337][ T6872] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 71.985913][ T6872] CR2: ffffffffffffffd6 CR3: 000000009f674000 CR4: 00000000001506e0 [ 71.994420][ T6872] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 72.004660][ T6872] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.012635][ T6872] Call Trace: [ 72.016899][ T6872] loop_rw_iter.part.0+0x26e/0x450 [ 72.022549][ T6872] ? rw_verify_area+0x11d/0x360 [ 72.028415][ T6872] io_write+0x6a2/0x7a0 [ 72.032600][ T6872] ? io_read+0xb60/0xb60 [ 72.037654][ T6872] ? mark_lock+0xbc/0x1710 [ 72.042601][ T6872] ? lock_repin_lock+0x460/0x460 [ 72.047550][ T6872] ? __lock_acquire+0x16cb/0x5640 [ 72.052934][ T6872] io_issue_sqe+0x1b0/0x60d0 [ 72.057560][ T6872] ? lockdep_hardirqs_on_prepare+0x530/0x530 [ 72.064799][ T6872] ? lockdep_hardirqs_on+0x76/0xf0 [ 72.070028][ T6872] ? kthread_use_mm+0x1dc/0x430 [ 72.075862][ T6872] ? io_uring_setup+0x28c0/0x28c0 [ 72.081514][ T6872] ? lock_downgrade+0x830/0x830 [ 72.086389][ T6872] ? kthread_use_mm+0x19b/0x430 [ 72.092909][ T6872] ? io_wq_submit_work+0x183/0x3d0 [ 72.098562][ T6872] io_wq_submit_work+0x183/0x3d0 [ 72.103979][ T6872] io_worker_handle_work+0xa45/0x13f0 [ 72.109372][ T6872] io_wqe_worker+0xbf0/0x10e0 [ 72.114074][ T6872] ? io_worker_handle_work+0x13f0/0x13f0 [ 72.119721][ T6872] ? lockdep_hardirqs_on+0x76/0xf0 [ 72.124846][ T6872] ? __kthread_parkme+0x13f/0x1e0 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 72.129886][ T6872] ? io_worker_handle_work+0x13f0/0x13f0 [ 72.135715][ T6872] kthread+0x3b5/0x4a0 [ 72.139809][ T6872] ? __kthread_bind_mask+0xc0/0xc0 [ 72.145631][ T6872] ? __kthread_bind_mask+0xc0/0xc0 [ 72.150764][ T6872] ret_from_fork+0x1f/0x30 [ 72.155534][ T6872] Modules linked in: [ 72.159866][ T6872] CR2: 0000000000000000 [ 72.173518][ T6872] ---[ end trace 8d1bfa541c1948d3 ]--- [ 72.179870][ T6872] RIP: 0010:0x0 executing program executing program [ 72.183442][ T6872] Code: Bad RIP value. [ 72.187520][ T6872] RSP: 0018:ffffc90005277910 EFLAGS: 00010246 [ 72.194435][ T6872] RAX: 1ffffffff10b0b9b RBX: dffffc0000000000 RCX: ffff88809e7d7a48 [ 72.207995][ T6872] RDX: 00000000000000a3 RSI: 0000000020000240 RDI: ffff888092b48500 [ 72.218047][ T6872] RBP: 0000000020000240 R08: ffffc90005277a28 R09: ffff88809edd990f executing program executing program executing program executing program executing program [ 72.228691][ T6872] R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90005277a28 [ 72.238828][ T6872] R13: ffffffff88585cc0 R14: 00000000000000a3 R15: 0000000000000001 [ 72.247677][ T6872] FS: 0000000000000000(0000) GS:ffff8880ae700000(0000) knlGS:0000000000000000 [ 72.258282][ T6872] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 72.267048][ T6872] CR2: 00007f3da7a5f018 CR3: 000000009f674000 CR4: 00000000001506e0 [ 72.275660][ T6872] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 executing program executing program [ 72.284424][ T6872] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 72.292640][ T6872] Kernel panic - not syncing: Fatal exception [ 72.300196][ T6872] Kernel Offset: disabled [ 72.304543][ T6872] Rebooting in 86400 seconds..