[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 29.977922] audit: type=1800 audit(1539321795.119:25): pid=5610 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 30.011337] audit: type=1800 audit(1539321795.129:26): pid=5610 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 30.035482] audit: type=1800 audit(1539321795.129:27): pid=5610 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 '10.128.0.92' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 41.251883] IPVS: ftp: loaded support on port[0] = 21 [ 41.310421] ------------[ cut here ]------------ [ 41.315409] usb usb7: BOGUS urb flags, 1 --> 0 [ 41.320271] WARNING: CPU: 0 PID: 5767 at drivers/usb/core/urb.c:503 usb_submit_urb+0x717/0x14e0 [ 41.329088] Kernel panic - not syncing: panic_on_warn set ... [ 41.329088] [ 41.336433] CPU: 0 PID: 5767 Comm: syz-executor538 Not tainted 4.19.0-rc7+ #278 [ 41.343856] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.353194] Call Trace: [ 41.355780] dump_stack+0x1c4/0x2b4 [ 41.359388] ? dump_stack_print_info.cold.2+0x52/0x52 [ 41.364567] panic+0x238/0x4e7 [ 41.367740] ? add_taint.cold.5+0x16/0x16 [ 41.371867] ? __warn.cold.8+0x148/0x1ba [ 41.375917] ? __warn.cold.8+0x117/0x1ba [ 41.379961] ? usb_submit_urb+0x717/0x14e0 [ 41.384175] __warn.cold.8+0x163/0x1ba [ 41.388047] ? usb_submit_urb+0x717/0x14e0 [ 41.392268] report_bug+0x254/0x2d0 [ 41.395894] do_error_trap+0x1fc/0x4d0 [ 41.399764] ? math_error+0x3f0/0x3f0 [ 41.403551] ? vprintk_default+0x28/0x30 [ 41.407598] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.412422] ? trace_hardirqs_on_caller+0x310/0x310 [ 41.417424] ? printk+0xa7/0xcf [ 41.420685] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.425509] do_invalid_op+0x1b/0x20 [ 41.429204] invalid_op+0x14/0x20 [ 41.432650] RIP: 0010:usb_submit_urb+0x717/0x14e0 [ 41.437490] 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 [ 41.456371] RSP: 0018:ffff8801d7f7f268 EFLAGS: 00010286 [ 41.461799] RAX: 0000000000000000 RBX: ffff8801d75ce900 RCX: 0000000000000000 [ 41.469066] RDX: 0000000000000000 RSI: ffffffff81650405 RDI: 0000000000000005 [ 41.476317] RBP: ffff8801d7f7f2d8 R08: ffff8801d82e2200 R09: fffffbfff12720fc [ 41.483566] R10: fffffbfff12720fc R11: ffffffff893907e3 R12: 0000000000000000 [ 41.490819] R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801ce24cd00 [ 41.498092] ? vprintk_func+0x85/0x181 [ 41.501967] ? usb_submit_urb+0x717/0x14e0 [ 41.506180] ? kasan_check_write+0x14/0x20 [ 41.510400] proc_do_submiturb+0x1b7d/0x4020 [ 41.514798] ? __might_fault+0x101/0x1e0 [ 41.518853] ? free_async+0x540/0x540 [ 41.522734] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 41.528265] ? _copy_from_user+0xdf/0x150 [ 41.532407] proc_submiturb_compat+0x544/0x800 [ 41.536974] ? proc_do_submiturb+0x4020/0x4020 [ 41.541545] ? get_page+0x250/0x250 [ 41.545160] usbdev_do_ioctl+0x19a2/0x3b50 [ 41.549378] ? processcompl_compat+0x680/0x680 [ 41.554059] ? follow_pfn+0x2e0/0x2e0 [ 41.557849] ? mnt_get_count+0x150/0x150 [ 41.561896] ? do_wp_page+0x76c/0x1390 [ 41.565790] ? lock_downgrade+0x900/0x900 [ 41.569933] ? kasan_check_read+0x11/0x20 [ 41.574067] ? do_raw_spin_unlock+0xa7/0x2f0 [ 41.578461] ? do_raw_spin_trylock+0x1c0/0x1c0 [ 41.583089] ? __pte_alloc_kernel+0x220/0x220 [ 41.587586] ? do_wp_page+0x77c/0x1390 [ 41.591457] ? finish_mkwrite_fault+0x4f0/0x4f0 [ 41.596119] ? lock_release+0x970/0x970 [ 41.600220] ? rcu_dynticks_curr_cpu_in_eqs+0x9f/0x160 [ 41.605486] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 41.611004] ? kasan_check_write+0x14/0x20 [ 41.615226] ? do_raw_spin_lock+0xc1/0x200 [ 41.619445] ? __handle_mm_fault+0x9ab/0x53e0 [ 41.623923] ? vmf_insert_mixed_mkwrite+0xa0/0xa0 [ 41.628760] ? save_stack+0xa9/0xd0 [ 41.632371] ? lock_acquire+0x1ed/0x520 [ 41.636324] ? handle_mm_fault+0x42a/0xc70 [ 41.640537] ? lock_downgrade+0x900/0x900 [ 41.644670] ? rcu_read_unlock_special.part.39+0x11f0/0x11f0 [ 41.650454] usbdev_ioctl+0x25/0x30 [ 41.654063] ? usbdev_compat_ioctl+0x30/0x30 [ 41.658453] do_vfs_ioctl+0x1de/0x1720 [ 41.662326] ? ioctl_preallocate+0x300/0x300 [ 41.666716] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.672238] ? __fget_light+0x2e9/0x430 [ 41.676194] ? fget_raw+0x20/0x20 [ 41.679641] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.685167] ? __do_page_fault+0x4a6/0xed0 [ 41.689384] ? security_file_ioctl+0x94/0xc0 [ 41.693777] ksys_ioctl+0xa9/0xd0 [ 41.697211] __x64_sys_ioctl+0x73/0xb0 [ 41.701080] do_syscall_64+0x1b9/0x820 [ 41.704945] ? entry_SYSCALL_64_after_hwframe+0x3e/0xbe [ 41.710304] ? syscall_return_slowpath+0x5e0/0x5e0 [ 41.715214] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.720052] ? trace_hardirqs_on_caller+0x310/0x310 [ 41.725046] ? prepare_exit_to_usermode+0x3b0/0x3b0 [ 41.730043] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 41.735557] ? prepare_exit_to_usermode+0x291/0x3b0 [ 41.740550] ? trace_hardirqs_off_thunk+0x1a/0x1c [ 41.745437] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 41.750667] RIP: 0033:0x444759 [ 41.753852] 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 [ 41.772736] RSP: 002b:00000000007eff78 EFLAGS: 00000213 ORIG_RAX: 0000000000000010 [ 41.780425] RAX: ffffffffffffffda RBX: 00007ffc565f3ac0 RCX: 0000000000444759 [ 41.787680] RDX: 0000000020000080 RSI: 00000000802c550a RDI: 0000000000000003 [ 41.795003] RBP: 0000000000000000 R08: 0000000120080522 R09: 0000000120080522 [ 41.802268] R10: 000000000000000f R11: 0000000000000213 R12: 0000000000402310 [ 41.809515] R13: 00000000004023a0 R14: 0000000000000000 R15: 0000000000000000 [ 41.817803] Kernel Offset: disabled [ 41.821424] Rebooting in 86400 seconds..