./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3811913506 <...> forked to background, child pid 4657 no interfaces have a carrier [ 54.224923][ T4658] 8021q: adding VLAN 0 to HW filter on device bond0 [ 54.234922][ T4658] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: OK syzkaller Warning: Permanently added '10.128.1.189' (ECDSA) to the list of known hosts. execve("./syz-executor3811913506", ["./syz-executor3811913506"], 0x7fffd0ae18a0 /* 10 vars */) = 0 brk(NULL) = 0x5555565dc000 brk(0x5555565dcc40) = 0x5555565dcc40 arch_prctl(ARCH_SET_FS, 0x5555565dc300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3811913506", 4096) = 28 brk(0x5555565fdc40) = 0x5555565fdc40 brk(0x5555565fe000) = 0x5555565fe000 mprotect(0x7fefe15d2000, 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, 0x7ffe6d0a7450) = 0 ioctl(3, UI_DEV_CREATE or USB_RAW_IOCTL_RUN, 0) = 0 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffe6d0a7450) = 0 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffe6d0a7450) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffe6d0a6440) = 18 syzkaller login: [ 76.943095][ T898] usb 1-1: new high-speed USB device number 2 using dummy_hcd ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffe6d0a7450) = 0 [ 77.193028][ T898] usb 1-1: Using ep0 maxpacket: 8 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffe6d0a6440) = 18 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffe6d0a7450) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffe6d0a6440) = 9 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffe6d0a7450) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffe6d0a6440) = 18 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffe6d0a7450) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffe6d0a6440) = 4 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffe6d0a7450) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffe6d0a6440) = 8 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffe6d0a7450) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffe6d0a6440) = 8 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffe6d0a7450) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7ffe6d0a6440) = 8 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7ffe6d0a7450) = 0 ioctl(3, USB_RAW_IOCTL_VBUS_DRAW, 0) = 0 ioctl(3, USB_RAW_IOCTL_CONFIGURE, 0) = 0 [ 77.483604][ T898] usb 1-1: New USB device found, idVendor=2040, idProduct=f5a0, bcdDevice=62.4d [ 77.493264][ T898] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 77.501287][ T898] usb 1-1: Product: syz [ 77.505661][ T898] usb 1-1: Manufacturer: syz [ 77.510564][ T898] usb 1-1: SerialNumber: syz [ 77.522974][ T898] usb 1-1: config 0 descriptor?? ioctl(3, USB_RAW_IOCTL_EP0_READ, 0x7ffe6d0a6440) = 0 [ 77.577011][ T898] smsusb:smsusb_probe: board id=8, interface number 0 [ 77.584120][ T898] ------------[ cut here ]------------ [ 77.589589][ T898] WARNING: CPU: 0 PID: 898 at kernel/workqueue.c:3167 __flush_work+0x946/0xb60 [ 77.598682][ T898] Modules linked in: [ 77.602626][ T898] CPU: 0 PID: 898 Comm: kworker/0:2 Not tainted 6.2.0-next-20230225-syzkaller #0 [ 77.611934][ T898] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/16/2023 [ 77.622097][ T898] Workqueue: usb_hub_wq hub_event [ 77.627245][ T898] RIP: 0010:__flush_work+0x946/0xb60 [ 77.632610][ T898] Code: 00 48 c7 c6 9b 0e 54 81 48 c7 c7 00 77 79 8c e8 00 0c 12 00 e9 6f fc ff ff e8 e6 96 30 00 0f 0b e9 63 fc ff ff e8 da 96 30 00 <0f> 0b 45 31 ed e9 54 fc ff ff e8 bb 22 82 00 e9 3e fb ff ff e8 c1 [ 77.652510][ T898] RSP: 0018:ffffc90004da6c00 EFLAGS: 00010293 [ 77.658725][ T898] RAX: 0000000000000000 RBX: ffff88801c9080e8 RCX: 0000000000000000 [ 77.666792][ T898] RDX: ffff88801ed83a80 RSI: ffffffff81540ed6 RDI: 0000000000000001 [ 77.674867][ T898] RBP: ffffc90004da6d98 R08: 0000000000000001 R09: 0000000000000000 [ 77.682955][ T898] R10: 0000000000000001 R11: 0000000000000000 R12: ffff88801c9080e8 [ 77.690993][ T898] R13: 0000000000000001 R14: 0000000000000001 R15: ffff88801c908100 [ 77.699077][ T898] FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 [ 77.708097][ T898] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 77.714755][ T898] CR2: 00007fffab8faa08 CR3: 00000000226cd000 CR4: 00000000003506f0 [ 77.722782][ T898] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 77.731106][ T898] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 77.739160][ T898] Call Trace: [ 77.742454][ T898] [ 77.745459][ T898] ? lockdep_hardirqs_on+0x7d/0x100 [ 77.751438][ T898] ? print_usage_bug.part.0+0x660/0x660 [ 77.757178][ T898] ? mod_delayed_work_on+0x220/0x220 [ 77.762570][ T898] ? kasan_save_stack+0x32/0x40 [ 77.767518][ T898] ? kasan_save_stack+0x22/0x40 [ 77.772416][ T898] ? kasan_set_track+0x25/0x30 exit_group(0) = ? +++ exited with 0 +++ [ 77.77