[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 35.104920] audit: type=1800 audit(1539316149.746:25): pid=5668 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 35.124043] audit: type=1800 audit(1539316149.746:26): pid=5668 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 35.146432] audit: type=1800 audit(1539316149.746:27): pid=5668 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[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.68' (ECDSA) to the list of known hosts. syzkaller login: [ 46.836692] IPVS: ftp: loaded support on port[0] = 21 executing program [ 46.902861] ------------[ cut here ]------------ [ 46.907650] usb usb7: BOGUS urb flags, 1 --> 0 [ 46.912626] WARNING: CPU: 1 PID: 5821 at drivers/usb/core/urb.c:503 usb_submit_urb+0x717/0x14e0 [ 46.921566] Kernel panic - not syncing: panic_on_warn set ... [ 46.921566] [ 46.928924] CPU: 1 PID: 5821 Comm: syz-executor281 Not tainted 4.19.0-rc7+ #278 [ 46.936468] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.946013] Call Trace: [ 46.948604] dump_stack+0x1c4/0x2b4 [ 46.952227] ? dump_stack_print_info.cold.2+0x52/0x52 [ 46.957418] panic+0x238/0x4e7 [ 46.960596] ? add_taint.cold.5+0x16/0x16 [ 46.964731] ? __warn.cold.8+0x148/0x1ba [ 46.968778] ? __warn.cold.8+0x117/0x1ba [ 46.972894] ? usb_submit_urb+0x717/0x14e0 [ 46.977121] __warn.cold.8+0x163/0x1ba [ 46.980998] ? usb_submit_urb+0x717/0x14e0 [ 46.985246] report_bug+0x254/0x2d0 [ 46.988878] do_error_trap+0x1fc/0x4d0 [ 46.992749] ? math_error+0x3f0/0x3f0 [ 46.996544] ? vprintk_default+0x28/0x30 [ 47.000589] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.005429] ? trace_hardirqs_on_caller+0x310/0x310 [ 47.010433] ? printk+0xa7/0xcf [ 47.013959] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.018794] do_invalid_op+0x1b/0x20 [ 47.022557] invalid_op+0x14/0x20 [ 47.026020] RIP: 0010:usb_submit_urb+0x717/0x14e0 [ 47.031113] 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 [ 47.050106] RSP: 0018:ffff8801bbd7f268 EFLAGS: 00010286 [ 47.055457] RAX: 0000000000000000 RBX: ffff8801d7694700 RCX: 0000000000000000 [ 47.062715] RDX: 0000000000000000 RSI: ffffffff81650405 RDI: 0000000000000005 [ 47.070077] RBP: ffff8801bbd7f2d8 R08: ffff8801d798c4c0 R09: fffffbfff12720fc [ 47.077338] R10: fffffbfff12720fc R11: ffffffff893907e3 R12: 0000000000000000 [ 47.084595] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801ce219e00 [ 47.091873] ? vprintk_func+0x85/0x181 [ 47.095750] ? usb_submit_urb+0x717/0x14e0 [ 47.100070] ? kasan_check_write+0x14/0x20 [ 47.104313] proc_do_submiturb+0x1b7d/0x4020 [ 47.108715] ? __might_fault+0x101/0x1e0 [ 47.112764] ? free_async+0x540/0x540 [ 47.116665] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.122646] ? _copy_from_user+0xdf/0x150 [ 47.126994] proc_submiturb_compat+0x544/0x800 [ 47.131659] ? proc_do_submiturb+0x4020/0x4020 [ 47.136286] ? get_page+0x250/0x250 [ 47.139909] usbdev_do_ioctl+0x19a2/0x3b50 [ 47.144132] ? processcompl_compat+0x680/0x680 [ 47.148709] ? follow_pfn+0x2e0/0x2e0 [ 47.152502] ? mnt_get_count+0x150/0x150 [ 47.156553] ? do_wp_page+0x76c/0x1390 [ 47.160425] ? lock_downgrade+0x900/0x900 [ 47.164559] ? kasan_check_read+0x11/0x20 [ 47.168700] ? do_raw_spin_unlock+0xa7/0x2f0 [ 47.173101] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 47.177668] ? __pte_alloc_kernel+0x220/0x220 [ 47.182156] ? do_wp_page+0x77c/0x1390 [ 47.186033] ? finish_mkwrite_fault+0x4f0/0x4f0 [ 47.190689] ? lock_release+0x970/0x970 [ 47.194659] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 47.199931] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.205457] ? kasan_check_write+0x14/0x20 [ 47.209678] ? do_raw_spin_lock+0xc1/0x200 [ 47.213901] ? __handle_mm_fault+0x9ab/0x53e0 [ 47.218382] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 47.223213] ? save_stack+0xa9/0xd0 [ 47.226840] ? lock_acquire+0x1ed/0x520 [ 47.230798] ? handle_mm_fault+0x42a/0xc70 [ 47.235032] ? lock_downgrade+0x900/0x900 [ 47.239170] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 47.244956] usbdev_ioctl+0x25/0x30 [ 47.248576] ? usbdev_compat_ioctl+0x30/0x30 [ 47.252983] do_vfs_ioctl+0x1de/0x1720 [ 47.256899] ? ioctl_preallocate+0x300/0x300 [ 47.261303] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.266824] ? __fget_light+0x2e9/0x430 [ 47.270786] ? fget_raw+0x20/0x20 [ 47.274228] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.279763] ? __do_page_fault+0x4a6/0xed0 [ 47.284032] ? security_file_ioctl+0x94/0xc0 [ 47.288438] ksys_ioctl+0xa9/0xd0 [ 47.291923] __x64_sys_ioctl+0x73/0xb0 [ 47.295806] do_syscall_64+0x1b9/0x820 [ 47.299679] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 47.305034] ? syscall_return_slowpath+0x5e0/0x5e0 [ 47.310022] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.314861] ? trace_hardirqs_on_caller+0x310/0x310 [ 47.319867] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 47.324874] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.330398] ? prepare_exit_to_usermode+0x291/0x3b0 [ 47.335403] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 47.340241] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.345422] RIP: 0033:0x444759 [ 47.348602] 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 [ 47.367636] RSP: 002b:00000000007eff78 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 47.375333] RAX: ffffffffffffffda RBX: 00007ffda18169f0 RCX: 0000000000444759 [ 47.382588] RDX: 0000000020000080 RSI: 00000000802c550a RDI: 0000000000000003 [ 47.389845] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 47.397100] R10: 000000000000000f R11: 0000000000000213 R12: 0000000000402310 [ 47.404356] R13: 00000000004023a0 R14: 0000000000000000 R15: 0000000000000000 [ 47.412532] Kernel Offset: disabled [ 47.416163] Rebooting in 86400 seconds..