[ 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. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.10.7' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 59.740054][ T8471] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 60.393392][ T8613] ------------[ cut here ]------------ [ 60.399074][ T8613] WARNING: CPU: 1 PID: 8613 at fs/io_uring.c:9096 io_uring_flush+0x326/0x3a0 [ 60.412579][ T8613] Modules linked in: [ 60.416976][ T8613] CPU: 1 PID: 8613 Comm: syz-executor948 Not tainted 5.11.0-rc3-syzkaller #0 [ 60.426955][ T8613] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.438982][ T8613] RIP: 0010:io_uring_flush+0x326/0x3a0 [ 60.445562][ T8613] Code: e9 58 fe ff ff e8 aa e3 9a ff 49 c7 84 24 a0 00 00 00 00 00 00 00 e9 aa fe ff ff e8 74 9e dd ff e9 91 fd ff ff e8 8a e3 9a ff <0f> 0b e9 51 ff ff ff e8 6e 9e dd ff e9 06 fd ff ff 4c 89 f7 e8 61 [ 60.466772][ T8613] RSP: 0018:ffffc90001a4faa0 EFLAGS: 00010293 [ 60.473173][ T8613] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 60.481162][ T8613] RDX: ffff88801113b780 RSI: ffffffff81d7e636 RDI: 0000000000000003 [ 60.489290][ T8613] RBP: ffff88801c862280 R08: 0000000000000000 R09: 00000000196e5401 [ 60.497319][ T8613] R10: ffffffff81d7e585 R11: 0000000000000000 R12: ffff888019724000 [ 60.505381][ T8613] R13: ffff8880196e5401 R14: ffff888019724040 R15: ffff8880197240d0 [ 60.513432][ T8613] FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 [ 60.522720][ T8613] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 60.529310][ T8613] CR2: 0000000000000000 CR3: 0000000025f8e000 CR4: 0000000000350ef0 [ 60.537522][ T8613] Call Trace: [ 60.540805][ T8613] ? io_disable_sqo_submit+0x130/0x130 [ 60.546351][ T8613] filp_close+0xb4/0x170 [ 60.550602][ T8613] put_files_struct+0x1cc/0x350 [ 60.555529][ T8613] exit_files+0x7e/0xa0 [ 60.559698][ T8613] do_exit+0xc22/0x2ae0 [ 60.563934][ T8613] ? find_held_lock+0x2d/0x110 [ 60.568702][ T8613] ? mm_update_next_owner+0x7a0/0x7a0 [ 60.574312][ T8613] ? get_signal+0x2f4/0x20a0 [ 60.578905][ T8613] ? lock_downgrade+0x6d0/0x6d0 [ 60.583819][ T8613] do_group_exit+0x125/0x310 [ 60.588411][ T8613] get_signal+0x3e9/0x20a0 [ 60.592885][ T8613] ? futex_exit_release+0x220/0x220 [ 60.598088][ T8613] ? find_held_lock+0x2d/0x110 [ 60.602932][ T8613] arch_do_signal_or_restart+0x2a8/0x1eb0 [ 60.608658][ T8613] ? do_raw_spin_lock+0x120/0x2b0 [ 60.613736][ T8613] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 60.620001][ T8613] ? put_files_struct+0x33/0x350 [ 60.625018][ T8613] ? do_raw_spin_unlock+0x171/0x230 [ 60.630237][ T8613] ? copy_siginfo_to_user32+0xa0/0xa0 [ 60.635695][ T8613] ? __do_sys_futex+0x2a2/0x470 [ 60.640573][ T8613] ? __do_sys_futex+0x2ab/0x470 [ 60.645529][ T8613] ? do_futex+0x1960/0x1960 [ 60.650054][ T8613] exit_to_user_mode_prepare+0x148/0x250 [ 60.655775][ T8613] syscall_exit_to_user_mode+0x19/0x50 [ 60.661267][ T8613] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 60.667256][ T8613] RIP: 0033:0x446b69 [ 60.671183][ T8613] Code: Unable to access opcode bytes at RIP 0x446b3f. [ 60.678341][ T8613] RSP: 002b:00007fbb80bcecf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 60.686902][ T8613] RAX: fffffffffffffe00 RBX: 00000000006dbc28 RCX: 0000000000446b69 [ 60.694940][ T8613] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28 [ 60.703356][ T8613] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 60.711333][ T8613] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 60.719401][ T8613] R13: 00007ffc1b88469f R14: 00007fbb80bcf9c0 R15: 00000000006dbc2c [ 60.727491][ T8613] Kernel panic - not syncing: panic_on_warn set ... [ 60.734089][ T8613] CPU: 0 PID: 8613 Comm: syz-executor948 Not tainted 5.11.0-rc3-syzkaller #0 [ 60.742831][ T8613] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 60.752870][ T8613] Call Trace: [ 60.756134][ T8613] dump_stack+0x107/0x163 [ 60.760472][ T8613] panic+0x306/0x73d [ 60.764447][ T8613] ? __warn_printk+0xf3/0xf3 [ 60.769837][ T8613] ? __warn.cold+0x1a/0x44 [ 60.774469][ T8613] ? io_uring_flush+0x326/0x3a0 [ 60.779402][ T8613] __warn.cold+0x35/0x44 [ 60.783888][ T8613] ? io_uring_flush+0x326/0x3a0 [ 60.788842][ T8613] report_bug+0x1bd/0x210 [ 60.793161][ T8613] handle_bug+0x3c/0x60 [ 60.797318][ T8613] exc_invalid_op+0x14/0x40 [ 60.801922][ T8613] asm_exc_invalid_op+0x12/0x20 [ 60.806776][ T8613] RIP: 0010:io_uring_flush+0x326/0x3a0 [ 60.812224][ T8613] Code: e9 58 fe ff ff e8 aa e3 9a ff 49 c7 84 24 a0 00 00 00 00 00 00 00 e9 aa fe ff ff e8 74 9e dd ff e9 91 fd ff ff e8 8a e3 9a ff <0f> 0b e9 51 ff ff ff e8 6e 9e dd ff e9 06 fd ff ff 4c 89 f7 e8 61 [ 60.831845][ T8613] RSP: 0018:ffffc90001a4faa0 EFLAGS: 00010293 [ 60.837904][ T8613] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 60.845881][ T8613] RDX: ffff88801113b780 RSI: ffffffff81d7e636 RDI: 0000000000000003 [ 60.853969][ T8613] RBP: ffff88801c862280 R08: 0000000000000000 R09: 00000000196e5401 [ 60.861945][ T8613] R10: ffffffff81d7e585 R11: 0000000000000000 R12: ffff888019724000 [ 60.869900][ T8613] R13: ffff8880196e5401 R14: ffff888019724040 R15: ffff8880197240d0 [ 60.877864][ T8613] ? io_uring_flush+0x275/0x3a0 [ 60.882705][ T8613] ? io_uring_flush+0x326/0x3a0 [ 60.887558][ T8613] ? io_disable_sqo_submit+0x130/0x130 [ 60.893007][ T8613] filp_close+0xb4/0x170 [ 60.897240][ T8613] put_files_struct+0x1cc/0x350 [ 60.902078][ T8613] exit_files+0x7e/0xa0 [ 60.906221][ T8613] do_exit+0xc22/0x2ae0 [ 60.910362][ T8613] ? find_held_lock+0x2d/0x110 [ 60.915119][ T8613] ? mm_update_next_owner+0x7a0/0x7a0 [ 60.920478][ T8613] ? get_signal+0x2f4/0x20a0 [ 60.925071][ T8613] ? lock_downgrade+0x6d0/0x6d0 [ 60.929928][ T8613] do_group_exit+0x125/0x310 [ 60.934503][ T8613] get_signal+0x3e9/0x20a0 [ 60.938901][ T8613] ? futex_exit_release+0x220/0x220 [ 60.944084][ T8613] ? find_held_lock+0x2d/0x110 [ 60.948853][ T8613] arch_do_signal_or_restart+0x2a8/0x1eb0 [ 60.954566][ T8613] ? do_raw_spin_lock+0x120/0x2b0 [ 60.959586][ T8613] ? __sanitizer_cov_trace_const_cmp1+0x22/0x80 [ 60.965822][ T8613] ? put_files_struct+0x33/0x350 [ 60.970752][ T8613] ? do_raw_spin_unlock+0x171/0x230 [ 60.976217][ T8613] ? copy_siginfo_to_user32+0xa0/0xa0 [ 60.981578][ T8613] ? __do_sys_futex+0x2a2/0x470 [ 60.986425][ T8613] ? __do_sys_futex+0x2ab/0x470 [ 60.991260][ T8613] ? do_futex+0x1960/0x1960 [ 60.995748][ T8613] exit_to_user_mode_prepare+0x148/0x250 [ 61.001366][ T8613] syscall_exit_to_user_mode+0x19/0x50 [ 61.006815][ T8613] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 61.012693][ T8613] RIP: 0033:0x446b69 [ 61.016584][ T8613] Code: Unable to access opcode bytes at RIP 0x446b3f. [ 61.023512][ T8613] RSP: 002b:00007fbb80bcecf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca [ 61.032010][ T8613] RAX: fffffffffffffe00 RBX: 00000000006dbc28 RCX: 0000000000446b69 [ 61.039961][ T8613] RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00000000006dbc28 [ 61.047913][ T8613] RBP: 00000000006dbc20 R08: 0000000000000000 R09: 0000000000000000 [ 61.055865][ T8613] R10: 0000000000000000 R11: 0000000000000246 R12: 00000000006dbc2c [ 61.064015][ T8613] R13: 00007ffc1b88469f R14: 00007fbb80bcf9c0 R15: 00000000006dbc2c [ 61.075536][ T8613] Kernel Offset: disabled [ 61.079914][ T8613] Rebooting in 86400 seconds..