usb usb7: BOGUS urb flags, 1 --> 0
WARNING: CPU: 1 PID: 7750 at drivers/usb/core/urb.c:503 usb_submit_urb+0x717/0x14e0 drivers/usb/core/urb.c:502
Kernel panic - not syncing: panic_on_warn set ...

CPU: 1 PID: 7750 Comm: syz-executor0 Not tainted 4.19.0-rc6-next-20181005+ #88
kobject: 'loop2' (0000000025912c0d): kobject_uevent_env
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+0x1d3/0x2c4 lib/dump_stack.c:113
kobject: 'loop2' (0000000025912c0d): fill_kobj_path: path = '/devices/virtual/block/loop2'
 panic+0x238/0x4e7 kernel/panic.c:184
kobject: 'loop5' (00000000576bc290): kobject_uevent_env
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
 report_bug+0x254/0x2d0 lib/bug.c:186
kobject: 'loop5' (00000000576bc290): fill_kobj_path: path = '/devices/virtual/block/loop5'
 fixup_bug arch/x86/kernel/traps.c:178 [inline]
 do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:271
 do_invalid_op+0x36/0x40 arch/x86/kernel/traps.c:290
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:969
RIP: 0010:usb_submit_urb+0x717/0x14e0 drivers/usb/core/urb.c:502
Code: 7e fc 48 8b 45 d0 48 8d b8 a0 00 00 00 e8 41 8f 44 ff 45 89 e0 44 89 e9 4c 89 fa 48 89 c6 48 c7 c7 00 fa 71 88 e8 29 d8 48 fc <0f> 0b e8 52 d2 7e fc 48 c7 c6 00 fb 71 88 4c 89 f7 e8 93 d3 7e fc
RSP: 0018:ffff8801841d7268 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffff8801cd0b3600 RCX: ffffc90001e6a000
RDX: 000000000000c71f RSI: ffffffff8163f7d5 RDI: 0000000000000005
RBP: ffff8801841d72d8 R08: ffff880184098180 R09: ffffed003b5e5008
R10: ffffed003b5e5008 R11: ffff8801daf28047 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801cd9153c0
 proc_do_submiturb+0x1b78/0x4010 drivers/usb/core/devio.c:1781
 proc_submiturb_compat+0x544/0x800 drivers/usb/core/devio.c:2015
 usbdev_do_ioctl+0x19a2/0x3b50 drivers/usb/core/devio.c:2492
 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
 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
RIP: 0033:0x457579
Code: 1d b4 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 eb b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f5a3c020c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579
RDX: 0000000020000080 RSI: 00000000802c550a RDI: 0000000000000003
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f5a3c0216d4
R13: 00000000004bf6c0 R14: 00000000004cf598 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..