[ 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 '10.128.1.15' (ECDSA) to the list of known hosts. syzkaller login: [ 54.858997][ T190] wlan0: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 54.874961][ T190] wlan0: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 54.906395][ T53] wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50 [ 54.915532][ T53] wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50 [ 54.939366][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready executing program executing program executing program executing program executing program executing program [ 54.956903][ T2941] IPv6: ADDRCONF(NETDEV_CHANGE): wlan1: link becomes ready 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 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 [ 68.953853][T13214] general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] PREEMPT SMP KASAN [ 68.965938][T13214] KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] [ 68.974329][T13214] CPU: 0 PID: 13214 Comm: iou-sqp-13213 Not tainted 5.14.0-syzkaller #0 [ 68.982898][T13214] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.992943][T13214] RIP: 0010:__io_file_supports_nowait+0x26/0x500 [ 68.999441][T13214] Code: 00 00 00 00 41 55 41 54 41 89 f4 55 48 89 fd 53 e8 6f 61 96 ff 48 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 2d 04 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b [ 69.019123][T13214] RSP: 0018:ffffc9000305f800 EFLAGS: 00010212 [ 69.025177][T13214] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 69.033133][T13214] RDX: 0000000000000004 RSI: ffffffff81dfb791 RDI: 0000000000000020 [ 69.041176][T13214] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 69.049134][T13214] R10: ffffffff81e28292 R11: 0000000000000001 R12: 0000000000000000 [ 69.057094][T13214] R13: ffffc9000305f8d8 R14: 0000000000000000 R15: 0000000000000001 [ 69.065052][T13214] FS: 00007fa1a4652700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 69.073970][T13214] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.080538][T13214] CR2: 0000000020000084 CR3: 0000000027153000 CR4: 0000000000350ef0 [ 69.088582][T13214] Call Trace: [ 69.092369][T13214] io_read+0x4a9/0x1140 [ 69.097089][T13214] ? kfree+0xe4/0x540 [ 69.101492][T13214] ? kasan_save_stack+0x1b/0x40 [ 69.106332][T13214] ? kasan_set_track+0x1c/0x30 [ 69.111081][T13214] ? io_uring_setup+0x2d60/0x2d60 [ 69.116092][T13214] ? kfree+0xe4/0x540 [ 69.120230][T13214] ? __io_commit_cqring_flush+0x1dc/0x7f0 [ 69.126891][T13214] ? io_submit_flush_completions+0x64f/0x790 [ 69.132857][T13214] ? io_sq_thread+0x733/0x1370 [ 69.137608][T13214] ? ret_from_fork+0x1f/0x30 [ 69.142185][T13214] ? kmem_cache_alloc_node+0x280/0x3e0 [ 69.147632][T13214] ? __io_commit_cqring_flush+0x1d4/0x7f0 [ 69.153339][T13214] ? io_submit_flush_completions+0x64f/0x790 [ 69.159307][T13214] ? io_submit_sqes+0x1fa1/0x9730 [ 69.164316][T13214] ? io_sq_thread+0x733/0x1370 [ 69.169070][T13214] ? lock_acquire+0x442/0x510 [ 69.173832][T13214] ? rcu_read_lock_sched_held+0xd/0x70 [ 69.179279][T13214] ? lock_release+0x522/0x720 [ 69.183942][T13214] ? debug_check_no_obj_freed+0x20c/0x420 [ 69.189911][T13214] ? lock_downgrade+0x6e0/0x6e0 [ 69.194746][T13214] ? rwlock_bug.part.0+0x90/0x90 [ 69.199683][T13214] ? rcu_read_lock_sched_held+0xd/0x70 [ 69.205213][T13214] ? lock_acquire+0x442/0x510 [ 69.210191][T13214] io_issue_sqe+0x209/0x6ba0 [ 69.214773][T13214] ? lock_release+0x522/0x720 [ 69.219783][T13214] ? lock_release+0x720/0x720 [ 69.224533][T13214] ? ttwu_do_activate+0x261/0x640 [ 69.229547][T13214] ? enqueue_entity+0x3e0/0x2080 [ 69.234618][T13214] ? io_write+0xed0/0xed0 [ 69.239194][T13214] ? rcu_read_lock_sched_held+0xd/0x70 [ 69.244637][T13214] ? rcu_read_lock_sched_held+0xd/0x70 [ 69.250078][T13214] ? lock_acquire+0x442/0x510 [ 69.254750][T13214] ? lock_release+0x720/0x720 [ 69.259428][T13214] ? lock_repin_lock+0x350/0x350 [ 69.264372][T13214] __io_queue_sqe+0x90/0xb50 [ 69.268953][T13214] ? lock_acquire+0x442/0x510 [ 69.273623][T13214] ? rcu_read_lock_sched_held+0xd/0x70 [ 69.279066][T13214] ? io_issue_sqe+0x6ba0/0x6ba0 [ 69.283901][T13214] ? tctx_task_work+0x11e/0x610 [ 69.288739][T13214] ? lock_downgrade+0x6e0/0x6e0 [ 69.293575][T13214] ? ww_mutex_unlock+0x2f0/0x2f0 [ 69.298505][T13214] ? rwlock_bug.part.0+0x90/0x90 [ 69.303441][T13214] io_req_task_submit+0xbf/0x1b0 [ 69.308383][T13214] tctx_task_work+0x166/0x610 [ 69.313049][T13214] ? io_fallback_req_func+0x3e0/0x3e0 [ 69.318410][T13214] ? rwlock_bug.part.0+0x90/0x90 [ 69.323369][T13214] task_work_run+0xdd/0x1a0 [ 69.327862][T13214] io_sq_thread+0x867/0x1370 [ 69.332445][T13214] ? io_uring_cancel_generic+0x740/0x740 [ 69.338068][T13214] ? lock_release+0x522/0x720 [ 69.342736][T13214] ? ret_from_fork+0x8/0x30 [ 69.347320][T13214] ? finish_wait+0x270/0x270 [ 69.353376][T13214] ? rwlock_bug.part.0+0x90/0x90 [ 69.358306][T13214] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 69.364540][T13214] ? io_uring_cancel_generic+0x740/0x740 [ 69.370168][T13214] ? io_uring_cancel_generic+0x740/0x740 [ 69.375789][T13214] ret_from_fork+0x1f/0x30 [ 69.380203][T13214] Modules linked in: [ 69.391118][T13214] ---[ end trace f12dea0e85a314d8 ]--- [ 69.396631][T13214] RIP: 0010:__io_file_supports_nowait+0x26/0x500 [ 69.403113][T13214] Code: 00 00 00 00 41 55 41 54 41 89 f4 55 48 89 fd 53 e8 6f 61 96 ff 48 8d 7d 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 2d 04 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b [ 69.423033][T13214] RSP: 0018:ffffc9000305f800 EFLAGS: 00010212 [ 69.429117][T13214] RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 69.437280][T13214] RDX: 0000000000000004 RSI: ffffffff81dfb791 RDI: 0000000000000020 [ 69.445282][T13214] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 [ 69.454147][T13214] R10: ffffffff81e28292 R11: 0000000000000001 R12: 0000000000000000 [ 69.462212][T13214] R13: ffffc9000305f8d8 R14: 0000000000000000 R15: 0000000000000001 [ 69.470173][T13214] FS: 00007fa1a4652700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 [ 69.479113][T13214] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.485713][T13214] CR2: 00007f7e4803c008 CR3: 0000000027153000 CR4: 0000000000350ee0 [ 69.493718][T13214] Kernel panic - not syncing: Fatal exception [ 69.508569][T13214] Kernel Offset: disabled [ 69.512874][T13214] Rebooting in 86400 seconds..