Oops: general protection fault, probably for non-canonical address 0xdffffc00000000e6: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000730-0x0000000000000737]
CPU: 3 UID: 0 PID: 9008 Comm: syz.1.802 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:f_midi2_free_ep_reqs+0x56/0x2b0 drivers/usb/gadget/function/f_midi2.c:1166
Code: 85 6a 02 00 00 49 8b 45 00 48 89 44 24 18 48 05 30 07 00 00 48 89 c2 48 89 44 24 20 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e b5 01 00 00 48 8b 44 24 18 31
RSP: 0018:ffffc90004b2f7b8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88803a3c4158 RCX: ffffc90004481000
RDX: 00000000000000e6 RSI: ffffffff87e73bc6 RDI: ffff88803a3c4128
RBP: ffff88803a3c4150 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000020
R13: ffff88803a3c4128 R14: ffff8880580f8120 R15: ffff88803a3c4000
FS:  00007febe73ac6c0(0000) GS:ffff8880d60d8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000003a1c7000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 f_midi2_free_ep drivers/usb/gadget/function/f_midi2.c:1208 [inline]
 f_midi2_unbind+0x265/0x800 drivers/usb/gadget/function/f_midi2.c:2066
 purge_configs_funcs+0x285/0x510 drivers/usb/gadget/configfs.c:1600
 configfs_composite_unbind+0xae/0x210 drivers/usb/gadget/configfs.c:1846
 gadget_unbind_driver+0x20c/0x4f0 drivers/usb/gadget/udc/core.c:1724
 device_remove+0xcb/0x180 drivers/base/dd.c:616
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
 bus_remove_device+0x2bc/0x560 drivers/base/bus.c:664
 device_del+0x376/0x9b0 drivers/base/core.c:3961
 usb_del_gadget+0x1b2/0x2d0 drivers/usb/gadget/udc/core.c:1591
 usb_del_gadget_udc+0x15/0x30 drivers/usb/gadget/udc/core.c:1614
 platform_remove+0x5f/0x80 drivers/base/platform.c:1456
 device_remove+0xcb/0x180 drivers/base/dd.c:616
 __device_release_driver drivers/base/dd.c:1349 [inline]
 device_release_driver_internal+0x44e/0x620 drivers/base/dd.c:1372
 unbind_store+0xf8/0x110 drivers/base/bus.c:244
 drv_attr_store+0x74/0xb0 drivers/base/bus.c:125
 sysfs_kf_write+0xf2/0x150 fs/sysfs/file.c:145
 kernfs_fop_write_iter+0x3e0/0x5f0 fs/kernfs/file.c:345
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x6ac/0x1050 fs/read_write.c:687
 ksys_write+0x12a/0x250 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7febe659e0d9
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:00007febe73ac028 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007febe6825fa0 RCX: 00007febe659e0d9
RDX: 000000000000000b RSI: 0000200000000400 RDI: 0000000000000004
RBP: 00007febe6635024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007febe6826038 R14: 00007febe6825fa0 R15: 00007fff922c24f8
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f_midi2_free_ep_reqs+0x56/0x2b0 drivers/usb/gadget/function/f_midi2.c:1166
Code: 85 6a 02 00 00 49 8b 45 00 48 89 44 24 18 48 05 30 07 00 00 48 89 c2 48 89 44 24 20 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e b5 01 00 00 48 8b 44 24 18 31
RSP: 0018:ffffc90004b2f7b8 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: ffff88803a3c4158 RCX: ffffc90004481000
RDX: 00000000000000e6 RSI: ffffffff87e73bc6 RDI: ffff88803a3c4128
RBP: ffff88803a3c4150 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000020
R13: ffff88803a3c4128 R14: ffff8880580f8120 R15: ffff88803a3c4000
FS:  00007febe73ac6c0(0000) GS:ffff8880d60d8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000000 CR3: 000000003a1c7000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess):
   0:	85 6a 02             	test   %ebp,0x2(%rdx)
   3:	00 00                	add    %al,(%rax)
   5:	49 8b 45 00          	mov    0x0(%r13),%rax
   9:	48 89 44 24 18       	mov    %rax,0x18(%rsp)
   e:	48 05 30 07 00 00    	add    $0x730,%rax
  14:	48 89 c2             	mov    %rax,%rdx
  17:	48 89 44 24 20       	mov    %rax,0x20(%rsp)
  1c:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  23:	fc ff df
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	74 08                	je     0x3a
  32:	3c 03                	cmp    $0x3,%al
  34:	0f 8e b5 01 00 00    	jle    0x1ef
  3a:	48 8b 44 24 18       	mov    0x18(%rsp),%rax
  3f:	31                   	.byte 0x31