[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [ 35.769403] audit: type=1800 audit(1539314520.632:25): pid=5672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.795754] audit: type=1800 audit(1539314520.632:26): pid=5672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 35.820779] audit: type=1800 audit(1539314520.632:27): pid=5672 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.27' (ECDSA) to the list of known hosts. syzkaller login: [ 46.542580] IPVS: ftp: loaded support on port[0] = 21 executing program [ 46.608711] ------------[ cut here ]------------ [ 46.613500] usb usb7: BOGUS urb flags, 1 --> 0 [ 46.618478] WARNING: CPU: 0 PID: 5828 at drivers/usb/core/urb.c:503 usb_submit_urb+0x717/0x14e0 [ 46.627304] Kernel panic - not syncing: panic_on_warn set ... [ 46.627304] [ 46.634647] CPU: 0 PID: 5828 Comm: syz-executor149 Not tainted 4.19.0-rc7+ #278 [ 46.642070] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.651401] Call Trace: [ 46.653974] dump_stack+0x1c4/0x2b4 [ 46.657585] ? dump_stack_print_info.cold.2+0x52/0x52 [ 46.662762] panic+0x238/0x4e7 [ 46.665938] ? add_taint.cold.5+0x16/0x16 [ 46.670079] ? __warn.cold.8+0x148/0x1ba [ 46.674121] ? __warn.cold.8+0x117/0x1ba [ 46.678168] ? usb_submit_urb+0x717/0x14e0 [ 46.682385] __warn.cold.8+0x163/0x1ba [ 46.686254] ? usb_submit_urb+0x717/0x14e0 [ 46.690487] report_bug+0x254/0x2d0 [ 46.694098] do_error_trap+0x1fc/0x4d0 [ 46.697980] ? math_error+0x3f0/0x3f0 [ 46.701777] ? vprintk_default+0x28/0x30 [ 46.705819] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.710643] ? trace_hardirqs_on_caller+0x310/0x310 [ 46.715638] ? printk+0xa7/0xcf [ 46.718900] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 46.723725] do_invalid_op+0x1b/0x20 [ 46.727422] invalid_op+0x14/0x20 [ 46.730856] RIP: 0010:usb_submit_urb+0x717/0x14e0 [ 46.735678] Code: 83 fc 48 8b 45 d0 48 8d b8 a0 00 00 00 e8 d1 be 44 ff 45 89 e0 44 89 e9 4c 89 fa 48 89 c6 48 c7 c7 00 72 71 88 e8 09 b3 4d fc <0f> 0b e8 12 e0 83 fc 48 c7 c6 00 73 71 88 4c 89 f7 e8 53 e1 83 fc [ 46.754574] RSP: 0018:ffff8801bb42f268 EFLAGS: 00010286 [ 46.759920] RAX: 0000000000000000 RBX: ffff8801d754d300 RCX: 0000000000000000 [ 46.767168] RDX: 0000000000000000 RSI: ffffffff81650405 RDI: 0000000000000005 [ 46.774416] RBP: ffff8801bb42f2d8 R08: ffff8801d8fa6200 R09: fffffbfff12720fc [ 46.781666] R10: fffffbfff12720fc R11: ffffffff893907e3 R12: 0000000000000000 [ 46.788921] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801cdc41bc0 [ 46.796177] ? vprintk_func+0x85/0x181 [ 46.800052] ? usb_submit_urb+0x717/0x14e0 [ 46.804266] ? kasan_check_write+0x14/0x20 [ 46.808487] proc_do_submiturb+0x1b7d/0x4020 [ 46.812884] ? __might_fault+0x101/0x1e0 [ 46.816936] ? free_async+0x540/0x540 [ 46.820740] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.826262] ? _copy_from_user+0xdf/0x150 [ 46.830408] proc_submiturb_compat+0x544/0x800 [ 46.834988] ? proc_do_submiturb+0x4020/0x4020 [ 46.839554] ? get_page+0x250/0x250 [ 46.843183] usbdev_do_ioctl+0x19a2/0x3b50 [ 46.847402] ? processcompl_compat+0x680/0x680 [ 46.851970] ? follow_pfn+0x2e0/0x2e0 [ 46.855758] ? mnt_get_count+0x150/0x150 [ 46.859804] ? do_wp_page+0x76c/0x1390 [ 46.863694] ? lock_downgrade+0x900/0x900 [ 46.867846] ? kasan_check_read+0x11/0x20 [ 46.871992] ? do_raw_spin_unlock+0xa7/0x2f0 [ 46.876383] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 46.880946] ? __pte_alloc_kernel+0x220/0x220 [ 46.885429] ? do_wp_page+0x77c/0x1390 [ 46.889302] ? finish_mkwrite_fault+0x4f0/0x4f0 [ 46.893953] ? lock_release+0x970/0x970 [ 46.897912] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 46.903188] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.908713] ? kasan_check_write+0x14/0x20 [ 46.912954] ? do_raw_spin_lock+0xc1/0x200 [ 46.917172] ? __handle_mm_fault+0x9ab/0x53e0 [ 46.921652] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 46.926478] ? save_stack+0xa9/0xd0 [ 46.930127] ? lock_acquire+0x1ed/0x520 [ 46.934086] ? handle_mm_fault+0x42a/0xc70 [ 46.938301] ? lock_downgrade+0x900/0x900 [ 46.942432] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 46.948213] usbdev_ioctl+0x25/0x30 [ 46.951826] ? usbdev_compat_ioctl+0x30/0x30 [ 46.956219] do_vfs_ioctl+0x1de/0x1720 [ 46.960092] ? ioctl_preallocate+0x300/0x300 [ 46.964484] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.970001] ? __fget_light+0x2e9/0x430 [ 46.973960] ? fget_raw+0x20/0x20 [ 46.977400] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.982922] ? __do_page_fault+0x4a6/0xed0 [ 46.987144] ? security_file_ioctl+0x94/0xc0 [ 46.991551] ksys_ioctl+0xa9/0xd0 [ 46.994987] __x64_sys_ioctl+0x73/0xb0 [ 46.998861] do_syscall_64+0x1b9/0x820 [ 47.002743] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 47.008090] ? syscall_return_slowpath+0x5e0/0x5e0 [ 47.013018] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.017846] ? trace_hardirqs_on_caller+0x310/0x310 [ 47.022859] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 47.027857] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.033380] ? prepare_exit_to_usermode+0x291/0x3b0 [ 47.038399] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.043227] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.048409] RIP: 0033:0x444769 [ 47.051596] Code: 25 02 00 85 c0 b8 00 00 00 00 48 0f 44 c3 5b c3 90 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 2b d7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 47.070490] RSP: 002b:00000000007eff78 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 47.078180] RAX: ffffffffffffffda RBX: 00007ffc1a2515c0 RCX: 0000000000444769 [ 47.085430] RDX: 0000000020000080 RSI: 00000000802c550a RDI: 0000000000000003 [ 47.092680] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 47.099941] R10: 000000000000000f R11: 0000000000000213 R12: 0000000000402320 [ 47.107194] R13: 00000000004023b0 R14: 0000000000000000 R15: 0000000000000000 [ 47.115265] Kernel Offset: disabled [ 47.118885] Rebooting in 86400 seconds..