./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3707661222 <...> Warning: Permanently added '10.128.1.108' (ECDSA) to the list of known hosts. execve("./syz-executor3707661222", ["./syz-executor3707661222"], 0x7ffe624e4c30 /* 10 vars */) = 0 brk(NULL) = 0x55555559c000 brk(0x55555559cc40) = 0x55555559cc40 arch_prctl(ARCH_SET_FS, 0x55555559c300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3707661222", 4096) = 28 brk(0x5555555bdc40) = 0x5555555bdc40 brk(0x5555555be000) = 0x5555555be000 mprotect(0x7f885f494000, 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, 0x7ffd0f87d6d0) = 0 ioctl(3, UI_DEV_CREATE or USB_RAW_IOCTL_RUN, 0) = 0 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd0f87d6d0) = 0 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd0f87d6d0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd0f87c6c0) = 18 syzkaller login: [ 77.483437][ T7] usb 1-1: new high-speed USB device number 2 using dummy_hcd ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd0f87d6d0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd0f87c6c0) = 18 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd0f87d6d0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd0f87c6c0) = 9 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd0f87d6d0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd0f87c6c0) = 18 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd0f87d6d0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd0f87c6c0) = 4 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd0f87d6d0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd0f87c6c0) = 8 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd0f87d6d0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd0f87c6c0) = 8 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd0f87d6d0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffd0f87c6c0) = 8 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffd0f87d6d0) = 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, 0x7ffd0f87c6c0) = 0 [ 78.004013][ T7] usb 1-1: New USB device found, idVendor=2040, idProduct=1801, bcdDevice=46.99 [ 78.013775][ T7] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 78.021792][ T7] usb 1-1: Product: syz [ 78.026105][ T7] usb 1-1: Manufacturer: syz [ 78.030869][ T7] usb 1-1: SerialNumber: syz [ 78.042991][ T7] usb 1-1: config 0 descriptor?? [ 78.087656][ T7] smsusb:smsusb_probe: board id=7, interface number 0 [ 78.094709][ T7] ------------[ cut here ]------------ [ 78.100183][ T7] WARNING: CPU: 0 PID: 7 at kernel/workqueue.c:3167 __flush_work+0x946/0xb60 [ 78.109110][ T7] Modules linked in: [ 78.113049][ T7] CPU: 0 PID: 7 Comm: kworker/0:0 Not tainted 6.2.0-rc8-next-20230217-syzkaller #0 [ 78.122460][ T7] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023 [ 78.132630][ T7] Workqueue: usb_hub_wq hub_event [ 78.137816][ T7] RIP: 0010:__flush_work+0x946/0xb60 [ 78.143186][ T7] Code: 00 48 c7 c6 7b 0d 54 81 48 c7 c7 40 79 79 8c e8 e0 0d 12 00 e9 6f fc ff ff e8 b6 85 30 00 0f 0b e9 63 fc ff ff e8 aa 85 30 00 <0f> 0b 45 31 ed e9 54 fc ff ff e8 eb 14 82 00 e9 3e fb ff ff e8 91 [ 78.162977][ T7] RSP: 0018:ffffc900000c6c00 EFLAGS: 00010293 [ 78.169149][ T7] RAX: 0000000000000000 RBX: ffff88802154e0e8 RCX: 0000000000000000 [ 78.177316][ T7] RDX: ffff8880167bba80 RSI: ffffffff81540db6 RDI: 0000000000000001 [ 78.185373][ T7] RBP: ffffc900000c6d98 R08: 0000000000000001 R09: 0000000000000000 [ 78.193497][ T7] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88802154e0e8 [ 78.201528][ T7] R13: 0000000000000001 R14: 0000000000000001 R15: ffff88802154e100 [ 78.209618][ T7] FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 78.218702][ T7] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 78.225395][ T7] CR2: 00007ffeb4d69de8 CR3: 000000000c571000 CR4: 00000000003506f0 [ 78.233463][ T7] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 78.241462][ T7] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 78.249518][ T7] Call Trace: [ 78.252886][ T7] [ 78.255945][ T7] ? lockdep_hardirqs_on+0x7d/0x100 [ 78.261218][ T7] ? print_usage_bug.part.0+0x660/0x660 [ 78.266864][ T7] ? mod_delayed_work_on+0x220/0x220 [ 78.272222][ T7] ? kasan_save_stack+0x32/0x40 [ 78.277310][ T7] ? kasan_save_stack+0x22/0x40 [ 78.282214][ T7] ? kasan_set_track+0x25/0x30 exit_group(0) = ? +++ exited with 0 +++ [ 78.287110][