------------[ cut here ]------------
usb usb7: BOGUS urb flags, 1 --> 0
WARNING: CPU: 1 PID: 32647 at drivers/usb/core/urb.c:503 usb_submit_urb+0x717/0x14e0 drivers/usb/core/urb.c:502
kobject: 'loop3' (00000000df13d468): kobject_uevent_env
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 32647 Comm: syz-executor2 Not tainted 4.19.0-rc7+ #60
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
kobject: 'loop3' (00000000df13d468): fill_kobj_path: path = '/devices/virtual/block/loop3'
 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+0x717/0x14e0 drivers/usb/core/urb.c:502
Code: 83 fc 48 8b 45 d0 48 8d b8 a0 00 00 00 e8 91 bf 44 ff 45 89 e0 44 89 e9 4c 89 fa 48 89 c6 48 c7 c7 a0 6f 71 88 e8 99 af 4d fc <0f> 0b e8 62 e0 83 fc 48 c7 c6 a0 70 71 88 4c 89 f7 e8 a3 e1 83 fc
RSP: 0018:ffff880182467268 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8801d3f14200 RCX: ffffc90005e72000
RDX: 0000000000011464 RSI: ffffffff8164d435 RDI: 0000000000000005
RBP: ffff8801824672d8 R08: ffff8801c5430040 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
kobject: 'loop5' (00000000ed2a8ffa): kobject_uevent_env
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801cd924d00
 proc_do_submiturb+0x1b7d/0x4020 drivers/usb/core/devio.c:1781
kobject: 'loop5' (00000000ed2a8ffa): fill_kobj_path: path = '/devices/virtual/block/loop5'
 proc_submiturb_compat+0x544/0x800 drivers/usb/core/devio.c:2015
kobject: 'loop3' (00000000df13d468): kobject_uevent_env
 usbdev_do_ioctl+0x19a2/0x3b50 drivers/usb/core/devio.c:2492
kobject: 'loop3' (00000000df13d468): fill_kobj_path: path = '/devices/virtual/block/loop3'
kobject: 'loop5' (00000000ed2a8ffa): kobject_uevent_env
 usbdev_ioctl+0x25/0x30 drivers/usb/core/devio.c:2569
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:501 [inline]
 do_vfs_ioctl+0x1de/0x1720 fs/ioctl.c:685
kobject: 'loop5' (00000000ed2a8ffa): fill_kobj_path: path = '/devices/virtual/block/loop5'
 ksys_ioctl+0xa9/0xd0 fs/ioctl.c:702
 __do_sys_ioctl fs/ioctl.c:709 [inline]
 __se_sys_ioctl fs/ioctl.c:707 [inline]
 __x64_sys_ioctl+0x73/0xb0 fs/ioctl.c:707
 do_syscall_64+0x1b9/0x820 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
kobject: 'loop5' (00000000ed2a8ffa): kobject_uevent_env
RIP: 0033:0x457569
Code: fd b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 cb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
kobject: 'loop5' (00000000ed2a8ffa): fill_kobj_path: path = '/devices/virtual/block/loop5'
RSP: 002b:00007f9030258c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457569
RDX: 0000000020000080 RSI: 00000000802c550a RDI: 0000000000000004
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f90302596d4
R13: 00000000004bf6ac R14: 00000000004cf598 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..