./strace-static-x86_64 -e \!wait4,clock_nanosleep,nanosleep -s 100 -x -f ./syz-executor3422326014 <...> forked to background, child pid 4671 [ 32.143054][ T4672] 8021q: adding VLAN 0 to HW filter on device bond0 [ 32.152458][ T4672] eql: remember to turn off Van-Jacobson compression on your slave devices Starting sshd: [ 32.477338][ T4746] sshd (4746) used greatest stack depth: 22704 bytes left OK syzkaller Warning: Permanently added '10.128.0.205' (ECDSA) to the list of known hosts. execve("./syz-executor3422326014", ["./syz-executor3422326014"], 0x7ffef58ee240 /* 10 vars */) = 0 brk(NULL) = 0x555555acd000 brk(0x555555acdc40) = 0x555555acdc40 arch_prctl(ARCH_SET_FS, 0x555555acd300) = 0 uname({sysname="Linux", nodename="syzkaller", ...}) = 0 readlink("/proc/self/exe", "/root/syz-executor3422326014", 4096) = 28 brk(0x555555aeec40) = 0x555555aeec40 brk(0x555555aef000) = 0x555555aef000 mprotect(0x7f69718da000, 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, 0x7fff2dd5e9c0) = 0 ioctl(3, UI_DEV_CREATE or USB_RAW_IOCTL_RUN, 0) = 0 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7fff2dd5e9c0) = 0 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7fff2dd5e9c0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7fff2dd5d9b0) = 18 syzkaller login: [ 58.678231][ T26] usb 1-1: new high-speed USB device number 2 using dummy_hcd ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7fff2dd5e9c0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7fff2dd5d9b0) = 18 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7fff2dd5e9c0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7fff2dd5d9b0) = 9 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7fff2dd5e9c0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7fff2dd5d9b0) = 18 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7fff2dd5e9c0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7fff2dd5d9b0) = 4 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7fff2dd5e9c0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7fff2dd5d9b0) = 8 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7fff2dd5e9c0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7fff2dd5d9b0) = 8 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7fff2dd5e9c0) = 0 ioctl(3, USB_RAW_IOCTL_EP0_WRITE, 0x7fff2dd5d9b0) = 8 ioctl(3, USB_RAW_IOCTL_EVENT_FETCH, 0x7fff2dd5e9c0) = 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, 0x7fff2dd5d9b0) = 0 [ 59.198652][ T26] usb 1-1: New USB device found, idVendor=2040, idProduct=1801, bcdDevice=46.99 [ 59.207916][ T26] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [ 59.215970][ T26] usb 1-1: Product: syz [ 59.220207][ T26] usb 1-1: Manufacturer: syz [ 59.224900][ T26] usb 1-1: SerialNumber: syz [ 59.232172][ T26] usb 1-1: config 0 descriptor?? [ 59.270985][ T26] smsusb:smsusb_probe: board id=7, interface number 0 [ 59.277881][ T26] ------------[ cut here ]------------ [ 59.283939][ T26] WARNING: CPU: 1 PID: 26 at kernel/workqueue.c:3184 __flush_work+0x946/0xb60 [ 59.292876][ T26] Modules linked in: [ 59.296850][ T26] CPU: 1 PID: 26 Comm: kworker/1:1 Not tainted 6.4.0-rc2-next-20230515-syzkaller #0 [ 59.306279][ T26] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 [ 59.316379][ T26] Workqueue: usb_hub_wq hub_event [ 59.321474][ T26] RIP: 0010:__flush_work+0x946/0xb60 [ 59.326870][ T26] Code: 00 48 c7 c6 5b c2 53 81 48 c7 c7 40 91 79 8c e8 30 08 12 00 e9 6f fc ff ff e8 26 61 30 00 0f 0b e9 63 fc ff ff e8 1a 61 30 00 <0f> 0b 45 31 ed e9 54 fc ff ff e8 2b 61 83 00 e9 3e fb ff ff e8 01 [ 59.346637][ T26] RSP: 0018:ffffc90000a1ec08 EFLAGS: 00010293 [ 59.352762][ T26] RAX: 0000000000000000 RBX: ffff88807d7260e8 RCX: 0000000000000000 [ 59.360801][ T26] RDX: ffff888019261dc0 RSI: ffffffff8153c296 RDI: 0000000000000001 [ 59.368905][ T26] RBP: ffffc90000a1eda0 R08: 0000000000000001 R09: 0000000000000000 [ 59.376967][ T26] R10: 0000000000000001 R11: ffffffff81d6fb82 R12: ffff88807d7260e8 [ 59.385046][ T26] R13: 0000000000000001 R14: 0000000000000001 R15: ffff88807d726100 [ 59.393212][ T26] FS: 0000000000000000(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000 [ 59.402322][ T26] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 59.408969][ T26] CR2: 0000556e0e9934b8 CR3: 0000000078bf2000 CR4: 00000000003506e0 [ 59.417052][ T26] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 59.425093][ T26] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 59.433107][ T26] Call Trace: [ 59.436374][ T26] [ 59.439405][ T26] ? lockdep_hardirqs_on+0x7d/0x100 [ 59.444727][ T26] ? print_usage_bug.part.0+0x660/0x660 [ 59.450698][ T26] ? mod_delayed_work_on+0x220/0x220 [ 59.456015][ T26] ? kasan_save_stack+0x32/0x40 [ 59.460932][ T26] ? kasan_save_stack+0x22/0x40 [ 59.466316][ T26] ? kasan_set_track+0x25/0x30 exit_group(0) = ? +++ exited with 0 +++ [ 59.47114