------------[ cut here ]------------
!work->func
WARNING: kernel/workqueue.c:4335 at __flush_work+0xb8f/0xca0, CPU#1: syz.7.2922/21154
Modules linked in:
CPU: 1 UID: 0 PID: 21154 Comm: syz.7.2922 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
RIP: 0010:__flush_work+0xb8f/0xca0
Code: 75 5e 48 8d 65 d8 5b 41 5c 41 5d 41 5e 41 5f 5d e9 86 84 45 0a cc e8 30 ce 38 00 90 0f 0b 90 e9 7c ff ff ff e8 22 ce 38 00 90 <0f> 0b 90 31 c0 48 bb f8 f8 f8 f8 f8 f8 f8 f8 e9 64 ff ff ff e8 08
RSP: 0018:ffffc900045bfa20 EFLAGS: 00010287
RAX: ffffffff818e346e RBX: ffff8881bd4a11b0 RCX: 0000000000080000
RDX: ffffc900263d3000 RSI: 00000000000007d1 RDI: 00000000000007d2
RBP: ffffc900045bfbd0 R08: ffffffff90574737 R09: 1ffffffff20ae8e6
R10: dffffc0000000000 R11: fffffbfff20ae8e7 R12: dffffc0000000000
R13: 1ffff11037a94236 R14: 1ffff920008b7f4c R15: ffff8881bd4a1198
FS:  00007fb9b7a1f6c0(0000) GS:ffff8882a8f54000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000110c47d94b CR3: 0000000171484000 CR4: 00000000000006f0
Call Trace:
 <TASK>
 __cancel_work_sync+0xbe/0x110
 f_midi_free+0xac/0x1f0
 config_usb_cfg_unlink+0x236/0x260
 configfs_symlink+0xde9/0x1030
 vfs_symlink+0x18b/0x330
 filename_symlinkat+0x1cd/0x410
 __se_sys_symlinkat+0x4e/0x2b0
 do_syscall_64+0x174/0x580
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb9b6b9e0d9
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:00007fb9b7a1f028 EFLAGS: 00000246 ORIG_RAX: 000000000000010a
RAX: ffffffffffffffda RBX: 00007fb9b6e26180 RCX: 00007fb9b6b9e0d9
RDX: 0000200000000340 RSI: ffffffffffffff9c RDI: 0000200000000100
RBP: 00007fb9b6c35024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb9b6e26218 R14: 00007fb9b6e26180 R15: 00007ffec68904a8
 </TASK>
