------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(1)
WARNING: kernel/locking/lockdep.c:238 at hlock_class kernel/locking/lockdep.c:238 [inline], CPU#0: syz.5.24815/24929
WARNING: kernel/locking/lockdep.c:238 at hlock_class kernel/locking/lockdep.c:227 [inline], CPU#0: syz.5.24815/24929
WARNING: kernel/locking/lockdep.c:238 at check_wait_context kernel/locking/lockdep.c:4854 [inline], CPU#0: syz.5.24815/24929
WARNING: kernel/locking/lockdep.c:238 at __lock_acquire+0x163b/0x2630 kernel/locking/lockdep.c:5187, CPU#0: syz.5.24815/24929
Modules linked in:
CPU: 0 UID: 0 PID: 24929 Comm: syz.5.24815 Tainted: G L syzkaller #0 PREEMPT(full)
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:hlock_class kernel/locking/lockdep.c:238 [inline]
RIP: 0010:hlock_class kernel/locking/lockdep.c:227 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4854 [inline]
RIP: 0010:__lock_acquire+0x1642/0x2630 kernel/locking/lockdep.c:5187
Code: 0f 16 c3 8d 67 48 0f b9 3a 44 8b 44 24 18 0f b6 54 24 10 8b 4c 24 08 e9 b6 f9 ff ff 48 8d 3d 25 8c d7 0e 48 c7 c6 0f 16 c3 8d <67> 48 0f b9 3a 44 8b 44 24 10 8b 4c 24 08 e9 c9 f9 ff ff e8 06 16
RSP: 0018:ffffc90007c77878 EFLAGS: 00010046
RAX: 0000000000000001 RBX: ffff8880585cb068 RCX: 0000000000000003
RDX: ffff8880585ca4c0 RSI: ffffffff8dc3160f RDI: ffffffff90ba9960
RBP: ffff8880585ca4c0 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000
R13: 00000000000015c8 R14: 0000000000000000 R15: 0000000000000000
FS: 00007f3d5bfc76c0(0000) GS:ffff8880d65db000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055cbffe6a6b0 CR3: 000000004e80b000 CR4: 0000000000352ef0
DR0: ffffffffffffffff DR1: 00000000000001f8 DR2: 0000000000000083
DR3: ffffffffefffff15 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
lock_acquire kernel/locking/lockdep.c:5868 [inline]
lock_acquire+0x17c/0x330 kernel/locking/lockdep.c:5825
touch_wq_lockdep_map+0xad/0x1c0 kernel/workqueue.c:3940
__flush_workqueue+0x131/0x1200 kernel/workqueue.c:3982
nci_close_device.isra.0+0xc5/0x380 net/nfc/nci/core.c:567
nci_dev_down+0x37/0x50 net/nfc/nci/core.c:639
nfc_dev_down+0x19d/0x300 net/nfc/core.c:161
nfc_rfkill_set_block+0x3b/0x100 net/nfc/core.c:179
rfkill_set_block+0x205/0x510 net/rfkill/core.c:346
rfkill_fop_write+0x2c0/0x580 net/rfkill/core.c:1301
vfs_write+0x2aa/0x1070 fs/read_write.c:684
ksys_write+0x1f8/0x250 fs/read_write.c:738
do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
do_syscall_64+0xc9/0xf80 arch/x86/entry/syscall_64.c:94
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f3d5b19aeb9
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3d5bfc7028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f3d5b415fa0 RCX: 00007f3d5b19aeb9
RDX: 0000000000000008 RSI: 0000200000000080 RDI: 0000000000000003
RBP: 00007f3d5b208c1f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3d5b416038 R14: 00007f3d5b415fa0 R15: 00007ffe3d2a7ee8
</TASK>
----------------
Code disassembly (best guess):
0: 0f 16 c3 movlhps %xmm3,%xmm0
3: 8d 67 48 lea 0x48(%rdi),%esp
6: 0f b9 3a ud1 (%rdx),%edi
9: 44 8b 44 24 18 mov 0x18(%rsp),%r8d
e: 0f b6 54 24 10 movzbl 0x10(%rsp),%edx
13: 8b 4c 24 08 mov 0x8(%rsp),%ecx
17: e9 b6 f9 ff ff jmp 0xfffff9d2
1c: 48 8d 3d 25 8c d7 0e lea 0xed78c25(%rip),%rdi # 0xed78c48
23: 48 c7 c6 0f 16 c3 8d mov $0xffffffff8dc3160f,%rsi
* 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction
2f: 44 8b 44 24 10 mov 0x10(%rsp),%r8d
34: 8b 4c 24 08 mov 0x8(%rsp),%ecx
38: e9 c9 f9 ff ff jmp 0xfffffa06
3d: e8 .byte 0xe8
3e: 06 (bad)
3f: 16 (bad)