./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor4205036464 <...> Warning: Permanently added '10.128.1.108' (ECDSA) to the list of known hosts. execve("./syz-executor4205036464", ["./syz-executor4205036464"], 0x7ffe52e60e60 /* 10 vars */) = 0 brk(NULL) = 0x5555565b3000 brk(0x5555565b3c40) = 0x5555565b3c40 arch_prctl(ARCH_SET_FS, 0x5555565b3300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor4205036464", 4096) = 28 brk(0x5555565d4c40) = 0x5555565d4c40 brk(0x5555565d5000) = 0x5555565d5000 mprotect(0x7f28ab031000, 16384, PROT_READ) = 0 mmap(0x1ffff000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x1ffff000 mmap(0x20000000, 16777216, PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x20000000 mmap(0x21000000, 4096, PROT_NONE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x21000000 openat(AT_FDCWD, "/dev/raw-gadget", O_RDWR) = 3 ioctl(3, USB_RAW_IOCTL_INIT, 0x7ffd4c5a7800) = 0 ioctl(3, UI_DEV_CREATE or USB_RAW_IOCTL_RUN, 0) = 0 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd4c5a7800) = 0 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd4c5a7800) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd4c5a67f0) = 18 syzkaller login: [ 73.445660][ T1122] usb 1-1: new high-speed USB device number 2 using dummy_hcd ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd4c5a7800) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd4c5a67f0) = 18 [ 73.685613][ T1122] usb 1-1: Using ep0 maxpacket: 16 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd4c5a7800) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd4c5a67f0) = 9 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd4c5a7800) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd4c5a67f0) = 18 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd4c5a7800) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd4c5a67f0) = 4 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd4c5a7800) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd4c5a67f0) = 8 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd4c5a7800) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd4c5a67f0) = 8 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd4c5a7800) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd4c5a67f0) = 8 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd4c5a7800) = 0 ioctl(3, USB_RAW_IOCTL_VBUS_DRAW, 0) = 0 ioctl(3, USB_RAW_IOCTL_CONFIGURE, 0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_READ, 0x7ffd4c5a67f0) = 0 [ 73.966387][ T1122] usb 1-1: New USB device found, idVendor=2040, idProduct=c0a0, bcdDevice= 9.80 [ 73.976048][ T1122] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 73.984063][ T1122] usb 1-1: Product: syz [ 73.988294][ T1122] usb 1-1: Manufacturer: syz [ 73.992957][ T1122] usb 1-1: SerialNumber: syz [ 74.004385][ T1122] usb 1-1: config 0 descriptor?? [ 74.059173][ T1122] smsusb:smsusb_probe: board id=8, interface number 0 [ 74.066241][ T1122] ------------[ cut here ]------------ [ 74.071703][ T1122] WARNING: CPU: 1 PID: 1122 at kernel/workqueue.c:3167 __flush_work+0x946/0xb60 [ 74.080831][ T1122] Modules linked in: [ 74.084759][ T1122] CPU: 1 PID: 1122 Comm: kworker/1:2 Not tainted 6.3.0-rc2-syzkaller-00405-ga3671bd86a97 #0 [ 74.094909][ T1122] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 [ 74.105037][ T1122] Workqueue: usb_hub_wq hub_event [ 74.110163][ T1122] RIP: 0010:__flush_work+0x946/0xb60 [ 74.115553][ T1122] Code: 00 48 c7 c6 fb 3a 53 81 48 c7 c7 c0 56 79 8c e8 50 77 11 00 e9 6f fc ff ff e8 d6 a9 2f 00 0f 0b e9 63 fc ff ff e8 ca a9 2f 00 <0f> 0b 45 31 ed e9 54 fc ff ff e8 eb b2 80 00 e9 3e fb ff ff e8 b1 [ 74.135282][ T1122] RSP: 0018:ffffc900061a6c00 EFLAGS: 00010293 [ 74.141460][ T1122] RAX: 0000000000000000 RBX: ffff88802652c0e8 RCX: 0000000000000000 [ 74.149528][ T1122] RDX: ffff88802197ba80 RSI: ffffffff81533b36 RDI: 0000000000000001 [ 74.157606][ T1122] RBP: ffffc900061a6d98 R08: 0000000000000001 R09: 0000000000000000 [ 74.165750][ T1122] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88802652c0e8 [ 74.173795][ T1122] R13: 0000000000000001 R14: 0000000000000001 R15: ffff88802652c100 [ 74.181884][ T1122] FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 74.190911][ T1122] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 74.197563][ T1122] CR2: 00007fffabcd6fa0 CR3: 000000002c7bf000 CR4: 00000000003506e0 exit_group(0) = ? [ 74.205624][ T1122] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 74.213615][ T1122] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 74.221657][ T1122] Call Trace: [ 74.224964][ T1122] [ 74.228046][ T1122] ? lockdep_hardirqs_on+0x7d/0x100 [ 74.233316][ T1122] ? print_usage_bug.part.0+0x660/0x660 [ 74.238961][ T1122] ? mod_delayed_work_on+0x220/0x220 [ 74.244312][ T1122] ? kasan_save_stack+0x32/0x40 [ 74.249257][ T1122] ? kasan_save_stack+0x22/0x40 [ 74.254177][ T1122] ? kasan_set_track+0x25/0x30 +++ exited with 0 +++ [ 74.25904