audit: type=1804 audit(1538829182.469:1912): pid=30400 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=open_writers comm="syz-executor1" name="/file0/root/syzkaller-testdir723855966/syzkaller.QmJz5V/817/file0" dev="sda1" ino=16565 res=1
------------[ cut here ]------------
usb usb7: BOGUS urb flags, 1 --> 0
kvm [30432]: vcpu0, guest rIP: 0x20e disabled perfctr wrmsr: 0xc1 data 0x60000000814
WARNING: CPU: 0 PID: 30446 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: 0 PID: 30446 Comm: syz-executor5 Not tainted 4.19.0-rc6+ #270
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kvm [30432]: vcpu0, guest rIP: 0x20e disabled perfctr wrmsr: 0xc2 data 0x60000000000
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
kobject: 'loop4' (000000004f52fab2): kobject_uevent_env
 __warn.cold.8+0x163/0x1ba kernel/panic.c:536
kobject: 'loop4' (000000004f52fab2): fill_kobj_path: path = '/devices/virtual/block/loop4'
 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
kvm [30432]: vcpu0, guest rIP: 0x20e ignored wrmsr: 0x11e data 0x60000000000
kvm [30432]: vcpu0, guest rIP: 0x20e disabled perfctr wrmsr: 0x186 data 0x60000000000
 do_invalid_op+0x1b/0x20 arch/x86/kernel/traps.c:316
kvm [30432]: vcpu0, guest rIP: 0x20e disabled perfctr wrmsr: 0x187 data 0x60000000802
 invalid_op+0x14/0x20 arch/x86/entry/entry_64.S:993
kobject: 'kvm' (00000000e541b88a): kobject_uevent_env
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 f1 bf 44 ff 45 89 e0 44 89 e9 4c 89 fa 48 89 c6 48 c7 c7 40 71 71 88 e8 49 be 4d fc <0f> 0b e8 52 eb 83 fc 48 c7 c6 40 72 71 88 4c 89 f7 e8 93 ec 83 fc
RSP: 0018:ffff880188e0f268 EFLAGS: 00010286
kobject: 'loop4' (000000004f52fab2): kobject_uevent_env
RAX: 0000000000000000 RBX: ffff8801ceebdb00 RCX: ffffc9000d7aa000
RDX: 000000000000d7d1 RSI: ffffffff81650405 RDI: 0000000000000005
RBP: ffff880188e0f2d8 R08: ffff8801cefd2240 R09: ffffed003b5c4fe8
R10: ffffed003b5c4fe8 R11: ffff8801dae27f47 R12: 0000000000000000
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8801ce219280
kobject: 'kvm' (00000000e541b88a): fill_kobj_path: path = '/devices/virtual/misc/kvm'
 proc_do_submiturb+0x1b7d/0x4020 drivers/usb/core/devio.c:1781
kobject: 'loop4' (000000004f52fab2): fill_kobj_path: path = '/devices/virtual/block/loop4'
audit: type=1804 audit(1538829182.469:1913): pid=30400 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor1" name="/file0/root/syzkaller-testdir723855966/syzkaller.QmJz5V/817/file0" dev="sda1" ino=16565 res=1
 proc_submiturb_compat+0x544/0x800 drivers/usb/core/devio.c:2015
kobject: 'loop4' (000000004f52fab2): kobject_uevent_env
 usbdev_do_ioctl+0x19a2/0x3b50 drivers/usb/core/devio.c:2492
audit: type=1804 audit(1538829182.519:1914): pid=30400 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=invalid_pcr cause=ToMToU comm="syz-executor1" name="/file0/root/syzkaller-testdir723855966/syzkaller.QmJz5V/817/file0" dev="sda1" ino=16565 res=1
kobject: 'loop4' (000000004f52fab2): fill_kobj_path: path = '/devices/virtual/block/loop4'
kobject: 'loop4' (000000004f52fab2): kobject_uevent_env
kobject: 'loop4' (000000004f52fab2): fill_kobj_path: path = '/devices/virtual/block/loop4'
 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:00007f2a29a48c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000457579
RDX: 0000000020000080 RSI: 00000000802c550a RDI: 0000000000000004
RBP: 000000000072bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f2a29a496d4
R13: 00000000004bf6c0 R14: 00000000004cf598 R15: 00000000ffffffff
Kernel Offset: disabled
Rebooting in 86400 seconds..