general protection fault, probably for non-canonical address 0xdffffc00000000e6: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000730-0x0000000000000737]
CPU: 1 PID: 5979 Comm: syz.0.26 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:f_midi2_free_ep_reqs drivers/usb/gadget/function/f_midi2.c:1166 [inline]
RIP: 0010:f_midi2_free_ep+0x52/0x2e0 drivers/usb/gadget/function/f_midi2.c:1209
Code: 4c 89 f0 48 c1 e8 03 80 3c 28 00 74 08 4c 89 f7 e8 73 dc 0a fb 41 bc 30 07 00 00 4d 03 26 4c 89 e0 48 c1 e8 03 48 89 44 24 30 <0f> b6 04 28 84 c0 0f 85 50 02 00 00 41 8b 1c 24 31 ff 89 de e8 85
RSP: 0018:ffffc9000516f768 EFLAGS: 00010202

RAX: 00000000000000e6 RBX: ffff888023fa8000 RCX: 0000000000080000
RDX: ffffc9000cf62000 RSI: 000000000007ffff RDI: 0000000000080000
RBP: dffffc0000000000 R08: ffffffff911eb61f R09: 1ffffffff223d6c3
R10: dffffc0000000000 R11: fffffbfff223d6c4 R12: 0000000000000730
R13: dffffc0000000000 R14: ffff888023fa8128 R15: dffffc0000000000
FS:  00007fa23e9d96c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f046d7fb000 CR3: 000000007c046000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 f_midi2_unbind+0x9b/0x330 drivers/usb/gadget/function/f_midi2.c:2069
 purge_configs_funcs+0x241/0x3a0 drivers/usb/gadget/configfs.c:1597
 configfs_composite_bind+0x1075/0x13f0 drivers/usb/gadget/configfs.c:1822
 gadget_bind_driver+0x2b3/0x770 drivers/usb/gadget/udc/core.c:1651
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x247/0xae0 drivers/base/dd.c:717
 __driver_probe_device+0x1f5/0x390 drivers/base/dd.c:879
 driver_probe_device+0x4f/0x420 drivers/base/dd.c:909
 __driver_attach+0x444/0x6d0 drivers/base/dd.c:1295
 bus_for_each_dev+0x235/0x2b0 drivers/base/bus.c:370
 bus_add_driver+0x340/0x630 drivers/base/bus.c:723
 driver_register+0x23a/0x310 drivers/base/driver.c:246
 usb_gadget_register_driver_owner+0xf9/0x270 drivers/usb/gadget/udc/core.c:1730
 gadget_dev_desc_UDC_store+0x1c7/0x2e0 drivers/usb/gadget/configfs.c:300
 flush_write_buffer fs/configfs/file.c:207 [inline]
 configfs_write_iter+0x312/0x400 fs/configfs/file.c:229
----------------
Code disassembly (best guess):
   0:	4c 89 f0             	mov    %r14,%rax
   3:	48 c1 e8 03          	shr    $0x3,%rax
   7:	80 3c 28 00          	cmpb   $0x0,(%rax,%rbp,1)
   b:	74 08                	je     0x15
   d:	4c 89 f7             	mov    %r14,%rdi
  10:	e8 73 dc 0a fb       	call   0xfb0adc88
  15:	41 bc 30 07 00 00    	mov    $0x730,%r12d
  1b:	4d 03 26             	add    (%r14),%r12
  1e:	4c 89 e0             	mov    %r12,%rax
  21:	48 c1 e8 03          	shr    $0x3,%rax
  25:	48 89 44 24 30       	mov    %rax,0x30(%rsp)
* 2a:	0f b6 04 28          	movzbl (%rax,%rbp,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 50 02 00 00    	jne    0x286
  36:	41 8b 1c 24          	mov    (%r12),%ebx
  3a:	31 ff                	xor    %edi,%edi
  3c:	89 de                	mov    %ebx,%esi
  3e:	e8                   	.byte 0xe8
  3f:	85                   	.byte 0x85