[ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ 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. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.180' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 55.734536][ T8494] ------------[ cut here ]------------ [ 55.740321][ T8494] WARNING: CPU: 0 PID: 8494 at fs/io_uring.c:8717 io_ring_ctx_wait_and_kill+0x4f2/0x600 [ 55.752826][ T8494] Modules linked in: [ 55.758678][ T8494] CPU: 0 PID: 8494 Comm: syz-executor170 Not tainted 5.11.0-rc3-syzkaller #0 [ 55.768582][ T8494] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.779549][ T8494] RIP: 0010:io_ring_ctx_wait_and_kill+0x4f2/0x600 [ 55.785991][ T8494] Code: 0f 85 23 01 00 00 48 8b ab 68 01 00 00 be 08 00 00 00 48 8d 7d 50 e8 8d 29 db ff f0 4c 29 65 50 e9 80 fd ff ff e8 0e 6a 98 ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 0f b6 04 [ 55.807131][ T8494] RSP: 0018:ffffc9000160fe38 EFLAGS: 00010293 [ 55.813334][ T8494] RAX: 0000000000000000 RBX: ffff888014c83000 RCX: 0000000000000000 [ 55.822373][ T8494] RDX: ffff888020309bc0 RSI: ffffffff81da5fb2 RDI: 0000000000000003 [ 55.830922][ T8494] RBP: ffff888014c83044 R08: 0000000000000002 R09: ffffffff8ed30867 [ 55.839647][ T8494] R10: ffffffff81da5b2d R11: 0000000000000000 R12: 0000000000000002 [ 55.848682][ T8494] R13: ffff888014c83040 R14: ffff888014c83380 R15: ffff88802e2ea000 [ 55.857630][ T8494] FS: 0000000002167880(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 55.867558][ T8494] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 55.874244][ T8494] CR2: 00007f69433e31f0 CR3: 0000000017b77000 CR4: 0000000000350ef0 [ 55.883214][ T8494] Call Trace: [ 55.888055][ T8494] ? ima_file_free+0xb6/0x420 [ 55.892759][ T8494] io_uring_release+0x3e/0x50 [ 55.898495][ T8494] __fput+0x283/0x920 [ 55.902497][ T8494] ? io_ring_ctx_wait_and_kill+0x600/0x600 [ 55.909558][ T8494] task_work_run+0xdd/0x190 [ 55.914092][ T8494] exit_to_user_mode_prepare+0x249/0x250 [ 55.920513][ T8494] syscall_exit_to_user_mode+0x19/0x50 [ 55.926015][ T8494] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 55.932760][ T8494] RIP: 0033:0x4402c9 [ 55.937511][ T8494] 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 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 55.957916][ T8494] RSP: 002b:00007ffca0848378 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 55.967001][ T8494] RAX: ffffffffffffffe8 RBX: 00000000004002c8 RCX: 00000000004402c9 [ 55.974986][ T8494] RDX: 00000000004402c9 RSI: 0000000020000040 RDI: 0000000000002094 [ 55.983814][ T8494] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 55.992372][ T8494] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ad0 [ 56.000834][ T8494] R13: 0000000000401b60 R14: 0000000000000000 R15: 0000000000000000 [ 56.009340][ T8494] Kernel panic - not syncing: panic_on_warn set ... [ 56.015928][ T8494] CPU: 0 PID: 8494 Comm: syz-executor170 Not tainted 5.11.0-rc3-syzkaller #0 [ 56.024693][ T8494] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 56.034781][ T8494] Call Trace: [ 56.038062][ T8494] dump_stack+0x107/0x163 [ 56.042419][ T8494] panic+0x306/0x73d [ 56.046339][ T8494] ? __warn_printk+0xf3/0xf3 [ 56.050935][ T8494] ? __warn.cold+0x1a/0x44 [ 56.055358][ T8494] ? io_ring_ctx_wait_and_kill+0x4f2/0x600 [ 56.061172][ T8494] __warn.cold+0x35/0x44 [ 56.065455][ T8494] ? io_ring_ctx_wait_and_kill+0x4f2/0x600 [ 56.071275][ T8494] report_bug+0x1bd/0x210 [ 56.075615][ T8494] handle_bug+0x3c/0x60 [ 56.079767][ T8494] exc_invalid_op+0x14/0x40 [ 56.084507][ T8494] asm_exc_invalid_op+0x12/0x20 [ 56.089360][ T8494] RIP: 0010:io_ring_ctx_wait_and_kill+0x4f2/0x600 [ 56.095785][ T8494] Code: 0f 85 23 01 00 00 48 8b ab 68 01 00 00 be 08 00 00 00 48 8d 7d 50 e8 8d 29 db ff f0 4c 29 65 50 e9 80 fd ff ff e8 0e 6a 98 ff <0f> 0b 48 b8 00 00 00 00 00 fc ff df 48 89 ea 48 c1 ea 03 0f b6 04 [ 56.115428][ T8494] RSP: 0018:ffffc9000160fe38 EFLAGS: 00010293 [ 56.121531][ T8494] RAX: 0000000000000000 RBX: ffff888014c83000 RCX: 0000000000000000 [ 56.129601][ T8494] RDX: ffff888020309bc0 RSI: ffffffff81da5fb2 RDI: 0000000000000003 [ 56.137578][ T8494] RBP: ffff888014c83044 R08: 0000000000000002 R09: ffffffff8ed30867 [ 56.145572][ T8494] R10: ffffffff81da5b2d R11: 0000000000000000 R12: 0000000000000002 [ 56.153548][ T8494] R13: ffff888014c83040 R14: ffff888014c83380 R15: ffff88802e2ea000 [ 56.161629][ T8494] ? io_ring_ctx_wait_and_kill+0x6d/0x600 [ 56.167479][ T8494] ? io_ring_ctx_wait_and_kill+0x4f2/0x600 [ 56.173667][ T8494] ? io_ring_ctx_wait_and_kill+0x4f2/0x600 [ 56.179476][ T8494] ? ima_file_free+0xb6/0x420 [ 56.184159][ T8494] io_uring_release+0x3e/0x50 [ 56.188870][ T8494] __fput+0x283/0x920 [ 56.192859][ T8494] ? io_ring_ctx_wait_and_kill+0x600/0x600 [ 56.198690][ T8494] task_work_run+0xdd/0x190 [ 56.203220][ T8494] exit_to_user_mode_prepare+0x249/0x250 [ 56.208880][ T8494] syscall_exit_to_user_mode+0x19/0x50 [ 56.214537][ T8494] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 56.220437][ T8494] RIP: 0033:0x4402c9 [ 56.224335][ T8494] 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 7b 13 fc ff c3 66 2e 0f 1f 84 00 00 00 00 [ 56.243951][ T8494] RSP: 002b:00007ffca0848378 EFLAGS: 00000246 ORIG_RAX: 00000000000001a9 [ 56.252380][ T8494] RAX: ffffffffffffffe8 RBX: 00000000004002c8 RCX: 00000000004402c9 [ 56.260390][ T8494] RDX: 00000000004402c9 RSI: 0000000020000040 RDI: 0000000000002094 [ 56.268370][ T8494] RBP: 00000000006ca018 R08: 0000000000000000 R09: 0000000000000000 [ 56.276342][ T8494] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ad0 [ 56.284315][ T8494] R13: 0000000000401b60 R14: 0000000000000000 R15: 0000000000000000 [ 56.296156][ T8494] Kernel Offset: disabled [ 56.301908][ T8494] Rebooting in 86400 seconds..