[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 32.697579] audit: type=1800 audit(1539317166.131:25): pid=5613 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 32.716845] audit: type=1800 audit(1539317166.131:26): pid=5613 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 32.741610] audit: type=1800 audit(1539317166.131:27): pid=5613 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 '10.128.0.120' (ECDSA) to the list of known hosts. syzkaller login: [ 39.834784] IPVS: ftp: loaded support on port[0] = 21 executing program [ 39.903499] ------------[ cut here ]------------ [ 39.908285] usb usb7: BOGUS urb flags, 1 --> 0 [ 39.913230] WARNING: CPU: 1 PID: 5766 at drivers/usb/core/urb.c:503 usb_submit_urb+0x717/0x14e0 [ 39.922080] Kernel panic - not syncing: panic_on_warn set ... [ 39.922080] [ 39.929432] CPU: 1 PID: 5766 Comm: syz-executor383 Not tainted 4.19.0-rc7+ #278 [ 39.937012] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 39.946354] Call Trace: [ 39.949014] dump_stack+0x1c4/0x2b4 [ 39.952638] ? dump_stack_print_info.cold.2+0x52/0x52 [ 39.957824] panic+0x238/0x4e7 [ 39.961009] ? add_taint.cold.5+0x16/0x16 [ 39.965147] ? __warn.cold.8+0x148/0x1ba [ 39.969195] ? __warn.cold.8+0x117/0x1ba [ 39.973377] ? usb_submit_urb+0x717/0x14e0 [ 39.977601] __warn.cold.8+0x163/0x1ba [ 39.981482] ? usb_submit_urb+0x717/0x14e0 [ 39.985708] report_bug+0x254/0x2d0 [ 39.989327] do_error_trap+0x1fc/0x4d0 [ 39.993204] ? math_error+0x3f0/0x3f0 [ 39.996994] ? vprintk_default+0x28/0x30 [ 40.001047] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.005895] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.010913] ? printk+0xa7/0xcf [ 40.014188] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.019020] do_invalid_op+0x1b/0x20 [ 40.022732] invalid_op+0x14/0x20 [ 40.026193] RIP: 0010:usb_submit_urb+0x717/0x14e0 [ 40.031028] 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 [ 40.050010] RSP: 0018:ffff8801d85c7268 EFLAGS: 00010286 [ 40.055365] RAX: 0000000000000000 RBX: ffff8801d7670100 RCX: 0000000000000000 [ 40.062632] RDX: 0000000000000000 RSI: ffffffff81650405 RDI: 0000000000000005 [ 40.069901] RBP: ffff8801d85c72d8 R08: ffff8801bbdba0c0 R09: fffffbfff12720fc [ 40.077161] R10: fffffbfff12720fc R11: ffffffff893907e3 R12: 0000000000000000 [ 40.084419] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801ce1bfc80 [ 40.091686] ? vprintk_func+0x85/0x181 [ 40.095567] ? usb_submit_urb+0x717/0x14e0 [ 40.099794] ? kasan_check_write+0x14/0x20 [ 40.104132] proc_do_submiturb+0x1b7d/0x4020 [ 40.108624] ? __might_fault+0x101/0x1e0 [ 40.112680] ? free_async+0x540/0x540 [ 40.116476] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 40.122082] ? _copy_from_user+0xdf/0x150 [ 40.126221] proc_submiturb_compat+0x544/0x800 [ 40.130796] ? proc_do_submiturb+0x4020/0x4020 [ 40.135371] ? get_page+0x250/0x250 [ 40.138991] usbdev_do_ioctl+0x19a2/0x3b50 [ 40.143216] ? processcompl_compat+0x680/0x680 [ 40.147790] ? follow_pfn+0x2e0/0x2e0 [ 40.151588] ? mnt_get_count+0x150/0x150 [ 40.155640] ? do_wp_page+0x76c/0x1390 [ 40.159516] ? lock_downgrade+0x900/0x900 [ 40.163654] ? kasan_check_read+0x11/0x20 [ 40.167794] ? do_raw_spin_unlock+0xa7/0x2f0 [ 40.172195] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 40.176774] ? __pte_alloc_kernel+0x220/0x220 [ 40.181268] ? do_wp_page+0x77c/0x1390 [ 40.185146] ? finish_mkwrite_fault+0x4f0/0x4f0 [ 40.189814] ? lock_release+0x970/0x970 [ 40.193783] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 40.199053] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 40.204578] ? kasan_check_write+0x14/0x20 [ 40.208804] ? do_raw_spin_lock+0xc1/0x200 [ 40.213119] ? __handle_mm_fault+0x9ab/0x53e0 [ 40.217614] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 40.222452] ? save_stack+0xa9/0xd0 [ 40.226074] ? lock_acquire+0x1ed/0x520 [ 40.230039] ? handle_mm_fault+0x42a/0xc70 [ 40.234271] ? lock_downgrade+0x900/0x900 [ 40.238414] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 40.244205] usbdev_ioctl+0x25/0x30 [ 40.247827] ? usbdev_compat_ioctl+0x30/0x30 [ 40.252229] do_vfs_ioctl+0x1de/0x1720 [ 40.256112] ? ioctl_preallocate+0x300/0x300 [ 40.260511] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.266040] ? __fget_light+0x2e9/0x430 [ 40.270004] ? fget_raw+0x20/0x20 [ 40.273451] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.278978] ? __do_page_fault+0x4a6/0xed0 [ 40.283211] ? security_file_ioctl+0x94/0xc0 [ 40.287611] ksys_ioctl+0xa9/0xd0 [ 40.291194] __x64_sys_ioctl+0x73/0xb0 [ 40.295075] do_syscall_64+0x1b9/0x820 [ 40.298965] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 40.304456] ? syscall_return_slowpath+0x5e0/0x5e0 [ 40.309377] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.314300] ? trace_hardirqs_on_caller+0x310/0x310 [ 40.319311] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 40.324423] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 40.329954] ? prepare_exit_to_usermode+0x291/0x3b0 [ 40.334962] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 40.339799] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 40.344982] RIP: 0033:0x444769 [ 40.348591] 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 [ 40.367486] RSP: 002b:00000000007eff78 EFLAGS: 00000217 ORIG_RAX: 0000000000000010 [ 40.375189] RAX: ffffffffffffffda RBX: 00007fffc7983290 RCX: 0000000000444769 [ 40.382465] RDX: 0000000020000080 RSI: 00000000802c550a RDI: 0000000000000005 [ 40.389739] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 40.397000] R10: 000000000000000f R11: 0000000000000217 R12: 0000000000402320 [ 40.404258] R13: 00000000004023b0 R14: 0000000000000000 R15: 0000000000000000 [ 40.413078] Kernel Offset: disabled [ 40.416725] Rebooting in 86400 seconds..