usb usb1: BOGUS urb flags, 40 --> 0
WARNING: CPU: 0 PID: 10313 at drivers/usb/core/urb.c:503 usb_submit_urb+0x717/0x1590 drivers/usb/core/urb.c:502
Kernel panic - not syncing: panic_on_warn set ...

CPU: 0 PID: 10313 Comm: syz-executor3 Not tainted 4.19.0-rc5+ #154
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c4/0x2b4 lib/dump_stack.c:113
 panic+0x238/0x4e7 kernel/panic.c:184
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x254/0x2d0 lib/bug.c:186
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x1fc/0x4d0 arch/x86/kernel/traps.c:296
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993
RIP: 0010:usb_submit_urb+0x717/0x1590 drivers/usb/core/urb.c:502
Code: 7b fc 48 8b 45 d0 48 8d b8 a0 00 00 00 e8 81 05 41 ff 45 89 e0 44 89 e9 4c 89 fa 48 89 c6 48 c7 c7 00 f2 79 88 e8 49 94 45 fc <0f> 0b e8 a2 ad 7b fc 48 c7 c6 00 f3 79 88 4c 89 f7 e8 e3 ae 7b fc
RSP: 0018:ffff8801d852f3d8 EFLAGS: 00010286
kobject: 'loop2' (00000000ee9a67e0): kobject_uevent_env
RAX: 0000000000000000 RBX: ffff8801cd10d500 RCX: ffffc90003865000
RDX: 0000000000010b1f RSI: ffffffff81650cb5 RDI: 0000000000000005
RBP: ffff8801d852f448 R08: ffff8801c30aa580 R09: ffffed003b584fe8
R10: ffffed003b584fe8 R11: ffff8801dac27f47 R12: 0000000000000000
R13: 0000000000000040 R14: 0000000000000000 R15: ffff8801ce5689c0
kobject: 'loop2' (00000000ee9a67e0): fill_kobj_path: path = '/devices/virtual/block/loop2'
 proc_do_submiturb+0x1a04/0x3dd0 drivers/usb/core/devio.c:1763
 proc_submiturb_compat+0x544/0x800 drivers/usb/core/devio.c:1997
 usbdev_do_ioctl+0x19a2/0x3b50 drivers/usb/core/devio.c:2474
kobject: 'loop2' (00000000ee9a67e0): kobject_uevent_env
kobject: 'loop2' (00000000ee9a67e0): fill_kobj_path: path = '/devices/virtual/block/loop2'
kobject: 'loop2' (00000000ee9a67e0): kobject_uevent_env
 usbdev_compat_ioctl+0x24/0x30 drivers/usb/core/devio.c:2562
 __do_compat_sys_ioctl fs/compat_ioctl.c:1419 [inline]
 __se_compat_sys_ioctl fs/compat_ioctl.c:1365 [inline]
 __ia32_compat_sys_ioctl+0x20e/0x630 fs/compat_ioctl.c:1365
kobject: 'loop2' (00000000ee9a67e0): fill_kobj_path: path = '/devices/virtual/block/loop2'
 do_syscall_32_irqs_on arch/x86/entry/common.c:326 [inline]
 do_fast_syscall_32+0x34d/0xfb2 arch/x86/entry/common.c:397
 entry_SYSENTER_compat+0x70/0x7f arch/x86/entry/entry_64_compat.S:139
RIP: 0023:0xf7f56ca9
Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 0c 24 c3 8b 1c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90
kobject: 'loop2' (00000000ee9a67e0): kobject_uevent_env
RSP: 002b:00000000f5f520cc EFLAGS: 00000296 ORIG_RAX: 0000000000000036
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000802c550a
kobject: 'loop2' (00000000ee9a67e0): fill_kobj_path: path = '/devices/virtual/block/loop2'
RDX: 0000000020000080 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Kernel Offset: disabled
Rebooting in 86400 seconds..