BUG: workqueue leaked atomic, lock or RCU: syz.5.2060[13867]
preempt=0x00000101 lock=3->0 RCU=0->0 workfn=usb_giveback_urb_bh
INFO: lockdep is turned off.
CPU: 0 UID: 0 PID: 13867 Comm: syz.5.2060 Not tainted syzkaller #0 PREEMPT(full)
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
<IRQ>
__dump_stack lib/dump_stack.c:94 [inline]
dump_stack_lvl+0x16c/0x1f0 lib/dump_stack.c:120
process_one_work+0x11f5/0x1b70 kernel/workqueue.c:3284
process_scheduled_works kernel/workqueue.c:3346 [inline]
bh_worker+0x5a4/0x8a0 kernel/workqueue.c:3607
workqueue_softirq_action+0x143/0x1a0 kernel/workqueue.c:3635
tasklet_hi_action+0x17/0x70 kernel/softirq.c:958
handle_softirqs+0x219/0x8e0 kernel/softirq.c:622
__do_softirq kernel/softirq.c:656 [inline]
invoke_softirq kernel/softirq.c:496 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:723
irq_exit_rcu+0x9/0x30 kernel/softirq.c:739
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1052 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1052
</IRQ>
<TASK>
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697
RIP: 0010:__raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:152 [inline]
RIP: 0010:_raw_spin_unlock_irqrestore+0x31/0x80 kernel/locking/spinlock.c:194
Code: f5 53 48 8b 74 24 10 48 89 fb 48 83 c7 18 e8 a6 47 30 f6 48 89 df e8 8e 9b 30 f6 f7 c5 00 02 00 00 75 23 9c 58 f6 c4 02 75 37 <bf> 01 00 00 00 e8 45 a6 20 f6 65 8b 05 7e a5 3b 08 85 c0 74 16 5b
RSP: 0018:ffffc90004937bc0 EFLAGS: 00000246
RAX: 0000000000000006 RBX: ffff8880324ba860 RCX: 0000000000000006
RDX: 0000000000000000 RSI: ffffffff8db032d9 RDI: ffffffff8bf1e2c0
RBP: 0000000000000293 R08: 0000000000000001 R09: 0000000000000001
R10: ffffffff90832dd7 R11: 0000000000000001 R12: ffff888021ef5900
R13: 0000000000000001 R14: 0000000000000000 R15: ffff8880324ba978
spin_unlock_irqrestore include/linux/spinlock.h:406 [inline]
raw_event_queue_add+0x19a/0x220 drivers/usb/gadget/legacy/raw_gadget.c:84
raw_queue_event drivers/usb/gadget/legacy/raw_gadget.c:239 [inline]
gadget_disconnect+0x5a/0x130 drivers/usb/gadget/legacy/raw_gadget.c:387
usb_gadget_disconnect_locked+0x20d/0x4e0 drivers/usb/gadget/udc/core.c:786
gadget_unbind_driver+0xd7/0x4e0 drivers/usb/gadget/udc/core.c:1670
device_remove+0xcb/0x170 drivers/base/dd.c:569
__device_release_driver drivers/base/dd.c:1274 [inline]
device_release_driver_internal+0x44b/0x620 drivers/base/dd.c:1297
driver_detach+0xd8/0x1b0 drivers/base/dd.c:1360
bus_remove_driver+0x13b/0x2c0 drivers/base/bus.c:747
driver_unregister+0x76/0xb0 drivers/base/driver.c:277
usb_gadget_unregister_driver+0x49/0x70 drivers/usb/gadget/udc/core.c:1736
raw_release+0x1ae/0x2b0 drivers/usb/gadget/legacy/raw_gadget.c:462
__fput+0x402/0xb70 fs/file_table.c:468
task_work_run+0x150/0x240 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xec/0x130 kernel/entry/common.c:43
exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
do_syscall_64+0x426/0xfa0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9646d8eec9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd399b4348 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000098721 RCX: 00007f9646d8eec9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f9646fe7da0 R08: 0000000000000001 R09: 00000006399b463f
R10: 0000001b2da20000 R11: 0000000000000246 R12: 00007f9646fe5fac
R13: 00007f9646fe5fa0 R14: ffffffffffffffff R15: 00007ffd399b4460
</TASK>
----------------
Code disassembly (best guess):
0: f5 cmc
1: 53 push %rbx
2: 48 8b 74 24 10 mov 0x10(%rsp),%rsi
7: 48 89 fb mov %rdi,%rbx
a: 48 83 c7 18 add $0x18,%rdi
e: e8 a6 47 30 f6 call 0xf63047b9
13: 48 89 df mov %rbx,%rdi
16: e8 8e 9b 30 f6 call 0xf6309ba9
1b: f7 c5 00 02 00 00 test $0x200,%ebp
21: 75 23 jne 0x46
23: 9c pushf
24: 58 pop %rax
25: f6 c4 02 test $0x2,%ah
28: 75 37 jne 0x61
* 2a: bf 01 00 00 00 mov $0x1,%edi <-- trapping instruction
2f: e8 45 a6 20 f6 call 0xf620a679
34: 65 8b 05 7e a5 3b 08 mov %gs:0x83ba57e(%rip),%eax # 0x83ba5b9
3b: 85 c0 test %eax,%eax
3d: 74 16 je 0x55
3f: 5b pop %rbx