INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] 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 '10.128.0.252' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 38.100452][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 38.340397][ T12] usb 1-1: Using ep0 maxpacket: 8 [ 38.460521][ T12] usb 1-1: config 0 has an invalid interface number: 174 but max is 0 [ 38.468892][ T12] usb 1-1: config 0 has an invalid descriptor of length 0, skipping remainder of the config [ 38.479213][ T12] usb 1-1: config 0 has no interface number 0 [ 38.485366][ T12] usb 1-1: New USB device found, idVendor=04e7, idProduct=0020, bcdDevice=4e.81 [ 38.494765][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 38.503995][ T12] usb 1-1: config 0 descriptor?? [ 38.542572][ T12] input: USB Touchscreen 04e7:0020 as /devices/platform/dummy_hcd.0/usb1/1-1/1-1:0.174/input/input5 [ 38.740932][ T1724] ------------[ cut here ]------------ [ 38.746449][ T1724] DEBUG_LOCKS_WARN_ON(lock->magic != lock) [ 38.746488][ T1724] WARNING: CPU: 0 PID: 1724 at kernel/locking/mutex.c:912 __mutex_lock+0xd31/0x1360 [ 38.761864][ T1724] Kernel panic - not syncing: panic_on_warn set ... [ 38.768501][ T1724] CPU: 0 PID: 1724 Comm: syz-executor025 Not tainted 5.3.0-rc2+ #23 [ 38.776574][ T1724] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 38.786731][ T1724] Call Trace: [ 38.790013][ T1724] dump_stack+0xca/0x13e [ 38.794256][ T1724] ? __mutex_lock+0xd20/0x1360 [ 38.799110][ T1724] panic+0x2a3/0x6da [ 38.802985][ T1724] ? add_taint.cold+0x16/0x16 [ 38.807635][ T1724] ? __probe_kernel_read+0x188/0x1d0 [ 38.812905][ T1724] ? __warn.cold+0x5/0x4a [ 38.817241][ T1724] ? __warn+0xe3/0x1e0 [ 38.821298][ T1724] ? __mutex_lock+0xd31/0x1360 [ 38.826037][ T1724] __warn.cold+0x20/0x4a [ 38.830270][ T1724] ? __mutex_lock+0xd31/0x1360 [ 38.835018][ T1724] report_bug+0x262/0x2a0 [ 38.839343][ T1724] do_error_trap+0x12b/0x1e0 [ 38.843913][ T1724] ? __mutex_lock+0xd31/0x1360 [ 38.848740][ T1724] do_invalid_op+0x32/0x40 [ 38.853143][ T1724] ? __mutex_lock+0xd31/0x1360 [ 38.857975][ T1724] invalid_op+0x23/0x30 [ 38.862163][ T1724] RIP: 0010:__mutex_lock+0xd31/0x1360 [ 38.867520][ T1724] Code: d2 0f 85 f6 05 00 00 44 8b 05 bb 99 0a 02 45 85 c0 0f 85 0a f4 ff ff 48 c7 c6 00 87 a6 85 48 c7 c7 a0 84 a6 85 e8 f4 24 b8 fb <0f> 0b e9 f0 f3 ff ff 65 48 8b 1c 25 00 ef 01 00 be 08 00 00 00 48 [ 38.887529][ T1724] RSP: 0018:ffff8881d29cf740 EFLAGS: 00010282 [ 38.893586][ T1724] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 38.901548][ T1724] RDX: 0000000000000000 RSI: ffffffff812830fd RDI: ffffed103a539eda [ 38.909511][ T1724] RBP: ffff8881d29cf8b0 R08: ffff8881d3e84800 R09: fffffbfff0d5eb25 [ 38.917637][ T1724] R10: fffffbfff0d5eb24 R11: ffffffff86af5923 R12: 0000000000000000 [ 38.925597][ T1724] R13: dffffc0000000000 R14: ffff8881d33cdbc8 R15: ffff8881d3e97140 [ 38.933567][ T1724] ? vprintk_func+0x7d/0x113 [ 38.938261][ T1724] ? usbtouch_open+0x101/0x310 [ 38.943002][ T1724] ? mutex_trylock+0x2c0/0x2c0 [ 38.948433][ T1724] ? mark_lock+0xbc/0x1130 [ 38.952872][ T1724] ? mark_held_locks+0x9f/0xe0 [ 38.957620][ T1724] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 38.963405][ T1724] ? lockdep_hardirqs_on+0x379/0x580 [ 38.968669][ T1724] ? usbtouch_open+0x101/0x310 [ 38.973512][ T1724] usbtouch_open+0x101/0x310 [ 38.978088][ T1724] input_open_device+0x170/0x280 [ 38.983033][ T1724] ? usbtouch_close+0x200/0x200 [ 38.987864][ T1724] evdev_open+0x3fe/0x510 [ 38.992176][ T1724] ? evdev_free+0x70/0x70 [ 38.996486][ T1724] chrdev_open+0x219/0x5c0 [ 39.000929][ T1724] ? cdev_put.part.0+0x50/0x50 [ 39.005689][ T1724] do_dentry_open+0x494/0x1120 [ 39.010474][ T1724] ? cdev_put.part.0+0x50/0x50 [ 39.015288][ T1724] ? chmod_common+0x3c0/0x3c0 [ 39.019989][ T1724] ? inode_permission+0xbe/0x3a0 [ 39.025037][ T1724] path_openat+0x1430/0x3f50 [ 39.029619][ T1724] ? save_stack+0x1b/0x80 [ 39.033926][ T1724] ? do_sys_open+0x294/0x580 [ 39.038494][ T1724] ? do_syscall_64+0xb7/0x580 [ 39.043256][ T1724] ? path_lookupat.isra.0+0x8d0/0x8d0 [ 39.048605][ T1724] ? __lock_acquire+0x145e/0x3b50 [ 39.053660][ T1724] do_filp_open+0x1a1/0x280 [ 39.058150][ T1724] ? may_open_dev+0xf0/0xf0 [ 39.062672][ T1724] ? __alloc_fd+0x46d/0x600 [ 39.067183][ T1724] ? do_raw_spin_lock+0x11a/0x280 [ 39.072240][ T1724] ? do_raw_spin_unlock+0x50/0x220 [ 39.077348][ T1724] ? _raw_spin_unlock+0x1f/0x30 [ 39.082189][ T1724] ? __alloc_fd+0x46d/0x600 [ 39.086697][ T1724] do_sys_open+0x3c0/0x580 [ 39.091112][ T1724] ? filp_open+0x70/0x70 [ 39.095340][ T1724] ? trace_hardirqs_off_caller+0x55/0x1e0 [ 39.101045][ T1724] do_syscall_64+0xb7/0x580 [ 39.105550][ T1724] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 39.111499][ T1724] RIP: 0033:0x4011f0 [ 39.115381][ T1724] Code: 01 f0 ff ff 0f 83 00 0b 00 00 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 9d 4b 2d 00 00 75 14 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 d4 0a 00 00 c3 48 83 ec 08 e8 3a 00 00 00 [ 39.135620][ T1724] RSP: 002b:00007ffc88d90d38 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 [ 39.144021][ T1724] RAX: ffffffffffffffda RBX: 0000000000000124 RCX: 00000000004011f0 [ 39.152091][ T1724] RDX: 0000000000000000 RSI: 0000000000020000 RDI: 00007ffc88d90d40 [ 39.160169][ T1724] RBP: 6666666666666667 R08: 000000000000000f R09: 0000000000000023 [ 39.168163][ T1724] R10: 0000000000000075 R11: 0000000000000246 R12: 0000000000402150 [ 39.176121][ T1724] R13: 00000000004021e0 R14: 0000000000000000 R15: 0000000000000000 [ 39.184463][ T1724] Kernel Offset: disabled [ 39.188782][ T1724] Rebooting in 86400 seconds..