[ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.199' (ECDSA) to the list of known hosts. syzkaller login: [ 68.150794][ T6542] general protection fault, probably for non-canonical address 0xdffffc000000000b: 0000 [#1] PREEMPT SMP KASAN [ 68.162521][ T6542] KASAN: null-ptr-deref in range [0x0000000000000058-0x000000000000005f] [ 68.171022][ T6542] CPU: 0 PID: 6542 Comm: syz-executor423 Not tainted 5.14.0-rc5-next-20210816-syzkaller #0 [ 68.181341][ T6542] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 68.191610][ T6542] RIP: 0010:__io_queue_sqe+0x278/0xeb0 [ 68.197186][ T6542] Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 07 0c 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 70 49 8d 7c 24 58 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 3e 0b 00 00 45 8b 74 24 58 31 [ 68.216877][ T6542] RSP: 0018:ffffc90002e4fd48 EFLAGS: 00010202 [ 68.223196][ T6542] RAX: dffffc0000000000 RBX: 1ffff920005c9fb0 RCX: 0000000000000000 [ 68.231240][ T6542] RDX: 000000000000000b RSI: ffffffff81e1bcbf RDI: 0000000000000058 [ 68.239307][ T6542] RBP: ffff88807afc6280 R08: 0000000000000001 R09: ffff88807afc62df [ 68.247321][ T6542] R10: ffffed100f5f8c5b R11: 0000000000000000 R12: 0000000000000000 [ 68.255534][ T6542] R13: 0000000000000000 R14: ffff88807afc62f0 R15: ffff88807afc62f0 [ 68.264010][ T6542] FS: 000000000169a300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 68.273012][ T6542] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.279791][ T6542] CR2: 00000000200002c4 CR3: 0000000072b0d000 CR4: 00000000001506f0 [ 68.287958][ T6542] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.295914][ T6542] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.304230][ T6542] Call Trace: [ 68.307493][ T6542] ? mutex_lock_io_nested+0x1160/0x1160 [ 68.313141][ T6542] ? rcu_read_lock_sched_held+0xd/0x70 [ 68.318676][ T6542] ? lock_release+0x522/0x720 [ 68.323347][ T6542] ? io_issue_sqe+0x6b30/0x6b30 [ 68.328180][ T6542] ? lock_downgrade+0x6e0/0x6e0 [ 68.333108][ T6542] ? do_raw_spin_lock+0x120/0x2b0 [ 68.338112][ T6542] ? rwlock_bug.part.0+0x90/0x90 [ 68.343045][ T6542] io_req_task_submit+0xaa/0x120 executing program [ 68.347980][ T6542] tctx_task_work+0x106/0x540 [ 68.352653][ T6542] task_work_run+0xdd/0x1a0 [ 68.357137][ T6542] exit_to_user_mode_prepare+0x256/0x290 [ 68.362775][ T6542] syscall_exit_to_user_mode+0x19/0x60 [ 68.368400][ T6542] do_syscall_64+0x42/0xb0 [ 68.372801][ T6542] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 68.378765][ T6542] RIP: 0033:0x43f169 [ 68.382640][ T6542] 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 [ 68.402576][ T6542] RSP: 002b:00007ffe2bd862a8 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa [ 68.410970][ T6542] RAX: 0000000000000200 RBX: 00000000004ad018 RCX: 000000000043f169 [ 68.419801][ T6542] RDX: 0000000000000000 RSI: 00000000000045f5 RDI: 0000000000000003 [ 68.427949][ T6542] RBP: 0000000000403150 R08: 0000000000000000 R09: 0000000000000000 [ 68.436259][ T6542] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004031e0 [ 68.444491][ T6542] R13: 0000000000000000 R14: 00000000004ad018 R15: 0000000000400488 [ 68.452576][ T6542] Modules linked in: [ 68.456852][ T6542] ---[ end trace bbf4e48f02e6cc2c ]--- [ 68.462415][ T6542] RIP: 0010:__io_queue_sqe+0x278/0xeb0 [ 68.468201][ T6542] Code: 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 07 0c 00 00 48 b8 00 00 00 00 00 fc ff df 4c 8b 65 70 49 8d 7c 24 58 48 89 fa 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 3e 0b 00 00 45 8b 74 24 58 31 [ 68.487857][ T6542] RSP: 0018:ffffc90002e4fd48 EFLAGS: 00010202 [ 68.493937][ T6542] RAX: dffffc0000000000 RBX: 1ffff920005c9fb0 RCX: 0000000000000000 [ 68.501983][ T6542] RDX: 000000000000000b RSI: ffffffff81e1bcbf RDI: 0000000000000058 [ 68.510126][ T6542] RBP: ffff88807afc6280 R08: 0000000000000001 R09: ffff88807afc62df [ 68.518333][ T6542] R10: ffffed100f5f8c5b R11: 0000000000000000 R12: 0000000000000000 [ 68.526368][ T6542] R13: 0000000000000000 R14: ffff88807afc62f0 R15: ffff88807afc62f0 [ 68.534405][ T6542] FS: 000000000169a300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 [ 68.543341][ T6542] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 68.550093][ T6542] CR2: 00000000200002c4 CR3: 0000000072b0d000 CR4: 00000000001506f0 [ 68.558120][ T6542] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 68.566123][ T6542] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 68.574155][ T6542] Kernel panic - not syncing: Fatal exception [ 68.580288][ T6542] Kernel Offset: disabled [ 68.584596][ T6542] Rebooting in 86400 seconds..