==================================================================
BUG: KASAN: use-after-free in register_lock_class+0xecc/0x1100 kernel/locking/lockdep.c:1291
Read of size 2 at addr ffff888137488092 by task systemd-udevd/7474

CPU: 1 PID: 7474 Comm: systemd-udevd Not tainted 5.11.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 <IRQ>
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x107/0x163 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:230
 __kasan_report mm/kasan/report.c:396 [inline]
 kasan_report.cold+0x79/0xd5 mm/kasan/report.c:413
 register_lock_class+0xecc/0x1100 kernel/locking/lockdep.c:1291
 __lock_acquire+0x101/0x54f0 kernel/locking/lockdep.c:4711
 lock_acquire kernel/locking/lockdep.c:5437 [inline]
 lock_acquire+0x288/0x700 kernel/locking/lockdep.c:5402
 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
 _raw_spin_lock_irqsave+0x36/0x50 kernel/locking/spinlock.c:159
 __wake_up_common_lock+0xb4/0x130 kernel/sched/wait.c:137
 usb_anchor_resume_wakeups drivers/usb/core/urb.c:937 [inline]
 usb_anchor_resume_wakeups+0xbe/0xe0 drivers/usb/core/urb.c:930
 __usb_hcd_giveback_urb+0x2df/0x5c0 drivers/usb/core/hcd.c:1661
 usb_hcd_giveback_urb+0x367/0x410 drivers/usb/core/hcd.c:1728
 dummy_timer+0x11f4/0x32a0 drivers/usb/gadget/udc/dummy_hcd.c:1971
 call_timer_fn+0x1a5/0x630 kernel/time/timer.c:1417
 expire_timers kernel/time/timer.c:1462 [inline]
 __run_timers.part.0+0x67c/0xa10 kernel/time/timer.c:1731
 __run_timers kernel/time/timer.c:1712 [inline]
 run_timer_softirq+0x80/0x120 kernel/time/timer.c:1744
 __do_softirq+0x1b7/0x977 kernel/softirq.c:343
 asm_call_irq_on_stack+0xf/0x20
 </IRQ>
 __run_on_irqstack arch/x86/include/asm/irq_stack.h:26 [inline]
 run_on_irqstack_cond arch/x86/include/asm/irq_stack.h:77 [inline]
 do_softirq_own_stack+0x80/0xa0 arch/x86/kernel/irq_64.c:77
 invoke_softirq kernel/softirq.c:226 [inline]
 __irq_exit_rcu kernel/softirq.c:420 [inline]
 irq_exit_rcu+0x110/0x1a0 kernel/softirq.c:432
 sysvec_apic_timer_interrupt+0x43/0xa0 arch/x86/kernel/apic/apic.c:1096
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:628
RIP: 0010:__sanitizer_cov_trace_pc+0x37/0x60 kernel/kcov.c:197
Code: 81 e1 00 01 00 00 65 48 8b 14 25 40 ef 01 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82 dc 13 00 00 85 c0 74 2b 8b 82 b8 13 00 00 <83> f8 02 75 20 48 8b 8a c0 13 00 00 8b 92 bc 13 00 00 48 8b 01 48
RSP: 0018:ffffc90005f875b0 EFLAGS: 00000246
RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000000
RDX: ffff888116d85040 RSI: ffffffff81dabe81 RDI: 0000000000000003
RBP: ffff888102c2bf00 R08: 0000000000000000 R09: 0000000000000003
R10: ffffffff81dabeba R11: 0000000000000010 R12: 0000000000000002
R13: 00000000000001cc R14: dffffc0000000000 R15: 0000000000000000
 tomoyo_domain_quota_is_ok+0x2f1/0x550 security/tomoyo/util.c:1093
 tomoyo_supervisor+0x2f2/0xf00 security/tomoyo/common.c:2089
 tomoyo_audit_path_log security/tomoyo/file.c:168 [inline]
 tomoyo_path_permission security/tomoyo/file.c:587 [inline]
 tomoyo_path_permission+0x270/0x3a0 security/tomoyo/file.c:573
 tomoyo_check_open_permission+0x33e/0x380 security/tomoyo/file.c:777
 tomoyo_file_open security/tomoyo/tomoyo.c:313 [inline]
 tomoyo_file_open+0xa3/0xd0 security/tomoyo/tomoyo.c:308
 security_file_open+0x52/0x4f0 security/security.c:1576
 do_dentry_open+0x353/0x1090 fs/open.c:804
 do_open fs/namei.c:3254 [inline]
 path_openat+0x1b9a/0x2730 fs/namei.c:3371
 do_filp_open+0x17e/0x3c0 fs/namei.c:3398
 do_sys_openat2+0x16d/0x420 fs/open.c:1172
 do_sys_open fs/open.c:1188 [inline]
 __do_sys_open fs/open.c:1196 [inline]
 __se_sys_open fs/open.c:1192 [inline]
 __x64_sys_open+0x119/0x1c0 fs/open.c:1192
 do_syscall_64+0x2d/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x7f97523546f0
Code: 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 83 3d 19 30 2c 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 fe 9d 01 00 48 89 04 24
RSP: 002b:00007ffda8db42a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
RAX: ffffffffffffffda RBX: 0000560343083730 RCX: 00007f97523546f0
RDX: 00000000000001b6 RSI: 0000000000080000 RDI: 00007ffda8db4450
RBP: 0000000000000008 R08: 0000000000000008 R09: 0000000000000001
R10: 0000000000080000 R11: 0000000000000246 R12: 000056034175268a
R13: 0000000000000001 R14: 000056034308c587 R15: 00007ffda8db44c0

Hi

When usb's device disconnect, we call usb_wait_anchor_empty_timeout ,
if timeout , will kill urb, however，if not timeout, we also need to kill urb.
I didn't test the patch, you can test it. 

diff --git a/drivers/input/joystick/xpad.c b/drivers/input/joystick/xpad.c
index 0687f0ed60b8..4233686d458d 100644
--- a/drivers/input/joystick/xpad.c
+++ b/drivers/input/joystick/xpad.c
@@ -1130,7 +1130,8 @@ static void xpad_stop_output(struct usb_xpad *xpad)
                        dev_warn(&xpad->intf->dev,
                                 "timed out waiting for output URB to complete, killing\n");
                        usb_kill_anchored_urbs(&xpad->irq_out_anchor);
-               }
+               } else
+                       usb_kill_urb(xpad->irq_out);
        }
 }

