Oops: general protection fault, probably for non-canonical address 0xdffffc00000000e6: 0000 [#1] SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000730-0x0000000000000737]
CPU: 1 UID: 0 PID: 19956 Comm: kworker/1:3 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
Workqueue: events debugfs_reap_work
RIP: 0010:f_midi2_stop_eps+0x5f/0x4d0
Code: e8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 ef e8 c7 f3 76 fa 41 bc 30 07 00 00 4c 03 65 00 4c 89 e0 48 c1 e8 03 48 89 44 24 10 <42> 0f b6 04 28 84 c0 0f 85 23 04 00 00 41 8b 1c 24 31 ff 89 de e8
RSP: 0018:ffffc90000a088f0 EFLAGS: 00010002
RAX: 00000000000000e6 RBX: 0000000000000001 RCX: ffff8881baff1d80
RDX: 0000000000000100 RSI: 0000000000000008 RDI: ffff888110bb0148
RBP: ffff888110bb00f0 R08: ffff888110bb014f R09: 1ffff11022176029
R10: dffffc0000000000 R11: ffffed102217602a R12: 0000000000000730
R13: dffffc0000000000 R14: ffff888110bb0128 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8882a9452000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31220ff8 CR3: 0000000114160000 CR4: 00000000000006f0
Call Trace:
 <IRQ>
 f_midi2_set_alt+0x11c/0xf00
 composite_setup+0x1fc3/0x3460
 configfs_composite_setup+0xc7/0x100
 dummy_timer+0x2e72/0x4b60
 __hrtimer_run_queues+0x527/0xc90
 hrtimer_run_softirq+0x182/0x580
 handle_softirqs+0x225/0x870
 __irq_exit_rcu+0x5f/0x150
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_spin_unlock_irq+0x29/0x50
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 da d4 ef f5 48 89 df e8 62 4a f0 f5 e8 cd 90 1b f6 fb bf 01 00 00 00 <e8> 12 17 e2 f5 65 8b 05 db 8c 6b 07 85 c0 74 07 5b e9 01 48 00 00
RSP: 0018:ffffc90007887af0 EFLAGS: 00000206
RAX: 00000000000d9e71 RBX: ffff88823c63a540 RCX: 0000000080000001
RDX: 0000000000000000 RSI: ffffffff8def4fc8 RDI: 0000000000000001
RBP: ffffc90007887ce8 R08: ffffffff901187f7 R09: 1ffffffff20230fe
R10: dffffc0000000000 R11: fffffbfff20230ff R12: 0000000001800000
R13: dffffc0000000000 R14: 0000000000000000 R15: ffffffff9a5ce740
 process_scheduled_works+0x8c6/0x1470
 worker_thread+0xa44/0xfb0
 kthread+0x388/0x470
 ret_from_fork+0x51e/0xb90
 ret_from_fork_asm+0x1a/0x30
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f_midi2_stop_eps+0x5f/0x4d0
Code: e8 48 c1 e8 03 42 80 3c 28 00 74 08 48 89 ef e8 c7 f3 76 fa 41 bc 30 07 00 00 4c 03 65 00 4c 89 e0 48 c1 e8 03 48 89 44 24 10 <42> 0f b6 04 28 84 c0 0f 85 23 04 00 00 41 8b 1c 24 31 ff 89 de e8
RSP: 0018:ffffc90000a088f0 EFLAGS: 00010002
RAX: 00000000000000e6 RBX: 0000000000000001 RCX: ffff8881baff1d80
RDX: 0000000000000100 RSI: 0000000000000008 RDI: ffff888110bb0148
RBP: ffff888110bb00f0 R08: ffff888110bb014f R09: 1ffff11022176029
R10: dffffc0000000000 R11: ffffed102217602a R12: 0000000000000730
R13: dffffc0000000000 R14: ffff888110bb0128 R15: 0000000000000001
FS:  0000000000000000(0000) GS:ffff8882a9452000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b31220ff8 CR3: 0000000114160000 CR4: 00000000000006f0
