BUG: workqueue leaked atomic, lock or RCU: syz.6.2417[14672]
preempt=0x00000100 lock=2->0 RCU=1->1 workfn=usb_giveback_urb_bh
INFO: lockdep is turned off.
CPU: 0 UID: 0 PID: 14672 Comm: syz.6.2417 Not tainted 6.16.0-rc6-syzkaller-00281-gf4a40a4282f4 #0 PREEMPT(full)
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
Call Trace:
__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:3259
process_scheduled_works kernel/workqueue.c:3321 [inline]
bh_worker+0x5a4/0x8a0 kernel/workqueue.c:3581
workqueue_softirq_action+0x143/0x1a0 kernel/workqueue.c:3608
tasklet_hi_action+0x17/0x70 kernel/softirq.c:860
handle_softirqs+0x219/0x8e0 kernel/softirq.c:579
__do_softirq kernel/softirq.c:613 [inline]
invoke_softirq kernel/softirq.c:453 [inline]
__irq_exit_rcu+0x109/0x170 kernel/softirq.c:680
irq_exit_rcu+0x9/0x30 kernel/softirq.c:696
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1050 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1050
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702
RIP: 0010:native_save_fl arch/x86/include/asm/irqflags.h:26 [inline]
RIP: 0010:arch_local_save_flags arch/x86/include/asm/irqflags.h:109 [inline]
RIP: 0010:arch_local_irq_save arch/x86/include/asm/irqflags.h:127 [inline]
RIP: 0010:lock_acquire kernel/locking/lockdep.c:5867 [inline]
RIP: 0010:lock_acquire+0x130/0x350 kernel/locking/lockdep.c:5828
Code: b1 00 00 00 65 8b 05 a7 b6 37 12 85 c0 0f 85 a2 00 00 00 65 48 8b 05 e7 74 37 12 8b 90 ec 0a 00 00 85 d2 0f 85 8c 00 00 00 9c <8f> 04 24 fa 48 c7 c7 1e 2f f2 8d e8 f0 f9 ed 09 45 89 e0 89 e9 44
RSP: 0018:ffffc900069ef2c8 EFLAGS: 00000246
RAX: ffff88805621a440 RBX: ffffffff8e5c4e00 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff816ad7a1 RDI: fffffbfff1cb89c0
RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000000
R10: ffffc900069ef408 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
rcu_lock_acquire include/linux/rcupdate.h:331 [inline]
rcu_read_lock include/linux/rcupdate.h:841 [inline]
class_rcu_constructor include/linux/rcupdate.h:1155 [inline]
unwind_next_frame+0xd1/0x20a0 arch/x86/kernel/unwind_orc.c:479
__unwind_start+0x45f/0x7f0 arch/x86/kernel/unwind_orc.c:758
unwind_start arch/x86/include/asm/unwind.h:64 [inline]
arch_stack_walk+0x73/0x100 arch/x86/kernel/stacktrace.c:24
stack_trace_save+0x8e/0xc0 kernel/stacktrace.c:122
kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
kasan_save_track+0x14/0x30 mm/kasan/common.c:68
unpoison_slab_object mm/kasan/common.c:319 [inline]
__kasan_slab_alloc+0x89/0x90 mm/kasan/common.c:345
kasan_slab_alloc include/linux/kasan.h:250 [inline]
slab_post_alloc_hook mm/slub.c:4148 [inline]
slab_alloc_node mm/slub.c:4197 [inline]
kmem_cache_alloc_noprof+0x1cb/0x3b0 mm/slub.c:4204
kmem_alloc_batch+0x49/0x170 lib/debugobjects.c:371
fill_pool lib/debugobjects.c:403 [inline]
debug_objects_fill_pool lib/debugobjects.c:725 [inline]
debug_objects_fill_pool+0x228/0x500 lib/debugobjects.c:697
debug_object_activate+0x10b/0x4c0 lib/debugobjects.c:814
debug_rcu_head_queue kernel/rcu/rcu.h:236 [inline]
__call_rcu_common.constprop.0+0x35/0xa10 kernel/rcu/tree.c:3079
security_inode_free+0xa4/0x170 security/security.c:1735
__destroy_inode+0x201/0x730 fs/inode.c:371
destroy_inode+0x91/0x1b0 fs/inode.c:394
evict+0x5b4/0x920 fs/inode.c:834
iput_final fs/inode.c:1898 [inline]
iput fs/inode.c:1924 [inline]
iput+0x521/0x880 fs/inode.c:1910
dentry_unlink_inode+0x29c/0x480 fs/dcache.c:466
__dentry_kill+0x1d0/0x600 fs/dcache.c:669
dput.part.0+0x4b1/0x9b0 fs/dcache.c:911
dput+0x1f/0x30 fs/dcache.c:901
find_next_child+0x18f/0x280 fs/libfs.c:603
simple_recursive_removal+0x253/0x690 fs/libfs.c:619
debugfs_remove+0x5d/0x80 fs/debugfs/inode.c:805
kvm_destroy_vm_debugfs+0xc6/0x250 virt/kvm/kvm_main.c:1007
kvm_destroy_vm virt/kvm/kvm_main.c:1271 [inline]
kvm_put_kvm+0xff/0xb40 virt/kvm/kvm_main.c:1344
kvm_vm_release+0x3c/0x50 virt/kvm/kvm_main.c:1367
__fput+0x3ff/0xb70 fs/file_table.c:465
task_work_run+0x14d/0x240 kernel/task_work.c:227
resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:114
exit_to_user_mode_prepare include/linux/entry-common.h:330 [inline]
syscall_exit_to_user_mode_work include/linux/entry-common.h:414 [inline]
syscall_exit_to_user_mode include/linux/entry-common.h:449 [inline]
do_syscall_64+0x3f6/0x4c0 arch/x86/entry/syscall_64.c:100
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe8a378e9a9
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:00007ffc1fa540f8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000035fcb RCX: 00007fe8a378e9a9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fe8a39b7ba0 R08: 0000000000000001 R09: 0000001e1fa543ef
R10: 00007fe8a3600000 R11: 0000000000000246 R12: 00007fe8a39b5fac
R13: 00007fe8a39b5fa0 R14: ffffffffffffffff R15: 00007ffc1fa54210
----------------
Code disassembly (best guess):
0: b1 00 mov $0x0,%cl
2: 00 00 add %al,(%rax)
4: 65 8b 05 a7 b6 37 12 mov %gs:0x1237b6a7(%rip),%eax # 0x1237b6b2
b: 85 c0 test %eax,%eax
d: 0f 85 a2 00 00 00 jne 0xb5
13: 65 48 8b 05 e7 74 37 mov %gs:0x123774e7(%rip),%rax # 0x12377502
1a: 12
1b: 8b 90 ec 0a 00 00 mov 0xaec(%rax),%edx
21: 85 d2 test %edx,%edx
23: 0f 85 8c 00 00 00 jne 0xb5
29: 9c pushf
* 2a: 8f 04 24 pop (%rsp) <-- trapping instruction
2d: fa cli
2e: 48 c7 c7 1e 2f f2 8d mov $0xffffffff8df22f1e,%rdi
35: e8 f0 f9 ed 09 call 0x9edfa2a
3a: 45 89 e0 mov %r12d,%r8d
3d: 89 e9 mov %ebp,%ecx
3f: 44 rex.R