Oops: general protection fault, probably for non-canonical address 0xdffffc00000000e6: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000730-0x0000000000000737]
CPU: 0 UID: 0 PID: 5750 Comm: udevd Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:f_midi2_free_ep_reqs drivers/usb/gadget/function/f_midi2.c:1166 [inline]
RIP: 0010:f_midi2_stop_eps+0x28e/0x4d0 drivers/usb/gadget/function/f_midi2.c:1246
Code: 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 f7 ec 63 fa 41 bf 30 07 00 00 4d 03 3e 4c 89 f8 48 c1 e8 03 48 89 44 24 18 <42> 0f b6 04 28 84 c0 0f 85 12 02 00 00 41 8b 1f 31 ff 89 de e8 a9
RSP: 0018:ffffc90000007930 EFLAGS: 00010012
RAX: 00000000000000e6 RBX: ffff88807845c120 RCX: ffff8880232e0000
RDX: 0000000000000100 RSI: ffffffff8c4bdd60 RDI: ffffffff8c4bdd20
RBP: ffff88807845c100 R08: 00000000df3f2b0c R09: 000000005cdac345
R10: 0000000000000010 R11: ffffffff8eb59c60 R12: ffff88807845c730
R13: dffffc0000000000 R14: ffff88807845c128 R15: 0000000000000730
FS:  00007fc41c1d8880(0000) GS:ffff888124f4d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe729f556c8 CR3: 00000000355d6000 CR4: 0000000000350ef0
Call Trace:
 <IRQ>
 f_midi2_set_alt+0x11c/0xf00 drivers/usb/gadget/function/f_midi2.c:1296
 composite_setup+0x1ffd/0x3480 drivers/usb/gadget/composite.c:1933
 configfs_composite_setup+0xc7/0x100 drivers/usb/gadget/configfs.c:1877
 dummy_timer+0x2f43/0x4cf0 drivers/usb/gadget/udc/dummy_hcd.c:1951
 __run_hrtimer kernel/time/hrtimer.c:2032 [inline]
 __hrtimer_run_queues+0x3bc/0xa10 kernel/time/hrtimer.c:2096
 hrtimer_run_softirq+0x17a/0x240 kernel/time/hrtimer.c:2113
 handle_softirqs+0x225/0x840 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0xca/0x220 kernel/softirq.c:735
 irq_exit_rcu+0x9/0x30 kernel/softirq.c:752
 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1062 [inline]
 sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1062
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674
RIP: 0010:kernfs_root+0xd0/0x230 fs/kernfs/kernfs-internal.h:77
Code: 4a 03 00 00 48 c7 c2 e0 65 02 8c e8 1a 9d 2d ff 49 bc 00 00 00 00 00 fc ff df 4d 8d 7e 30 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 <74> 08 4c 89 ff e8 a6 3a bf ff 4d 8b 3f e8 fe 28 5c 09 89 c5 31 ff
RSP: 0018:ffffc9000249f8c8 EFLAGS: 00000246
RAX: 1ffff1100a5b3cba RBX: ffffffff827570cc RCX: ffff8880232e0000
RDX: 0000000000000000 RSI: ffffffff8c4bdd60 RDI: ffffffff8c4bdd20
RBP: 0000000000000001 R08: ffffffff827570cc R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff8eb59c60 R12: dffffc0000000000
R13: dffffc0000000000 R14: ffff888052d9e5a0 R15: ffff888052d9e5d0
 kernfs_fop_open+0x4f/0xce0 fs/kernfs/file.c:606
 do_dentry_open+0x816/0x1380 fs/open.c:947
 vfs_open+0x3b/0x340 fs/open.c:1052
 do_open fs/namei.c:4700 [inline]
 path_openat+0x2e44/0x3830 fs/namei.c:4863
 do_file_open+0x23e/0x4a0 fs/namei.c:4892
 do_sys_openat2+0x115/0x200 fs/open.c:1368
 do_sys_open fs/open.c:1374 [inline]
 __do_sys_openat fs/open.c:1390 [inline]
 __se_sys_openat fs/open.c:1385 [inline]
 __x64_sys_openat+0x138/0x170 fs/open.c:1385
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc41baa7407
Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff
RSP: 002b:00007fff980c1df0 EFLAGS: 00000202 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fc41c1d8880 RCX: 00007fc41baa7407
RDX: 0000000000080000 RSI: 00007fff980c1f20 RDI: ffffffffffffff9c
RBP: 00005605b7a93f10 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000202 R12: 00005605b7a94000
R13: 00007fff980c1f20 R14: 00007fff980c3811 R15: 000056059057700c
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:f_midi2_free_ep_reqs drivers/usb/gadget/function/f_midi2.c:1166 [inline]
RIP: 0010:f_midi2_stop_eps+0x28e/0x4d0 drivers/usb/gadget/function/f_midi2.c:1246
Code: 89 f0 48 c1 e8 03 42 80 3c 28 00 74 08 4c 89 f7 e8 f7 ec 63 fa 41 bf 30 07 00 00 4d 03 3e 4c 89 f8 48 c1 e8 03 48 89 44 24 18 <42> 0f b6 04 28 84 c0 0f 85 12 02 00 00 41 8b 1f 31 ff 89 de e8 a9
RSP: 0018:ffffc90000007930 EFLAGS: 00010012
RAX: 00000000000000e6 RBX: ffff88807845c120 RCX: ffff8880232e0000
RDX: 0000000000000100 RSI: ffffffff8c4bdd60 RDI: ffffffff8c4bdd20
RBP: ffff88807845c100 R08: 00000000df3f2b0c R09: 000000005cdac345
R10: 0000000000000010 R11: ffffffff8eb59c60 R12: ffff88807845c730
R13: dffffc0000000000 R14: ffff88807845c128 R15: 0000000000000730
FS:  00007fc41c1d8880(0000) GS:ffff888124f4d000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fe729f556c8 CR3: 00000000355d6000 CR4: 0000000000350ef0
----------------
Code disassembly (best guess):
   0:	89 f0                	mov    %esi,%eax
   2:	48 c1 e8 03          	shr    $0x3,%rax
   6:	42 80 3c 28 00       	cmpb   $0x0,(%rax,%r13,1)
   b:	74 08                	je     0x15
   d:	4c 89 f7             	mov    %r14,%rdi
  10:	e8 f7 ec 63 fa       	call   0xfa63ed0c
  15:	41 bf 30 07 00 00    	mov    $0x730,%r15d
  1b:	4d 03 3e             	add    (%r14),%r15
  1e:	4c 89 f8             	mov    %r15,%rax
  21:	48 c1 e8 03          	shr    $0x3,%rax
  25:	48 89 44 24 18       	mov    %rax,0x18(%rsp)
* 2a:	42 0f b6 04 28       	movzbl (%rax,%r13,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 12 02 00 00    	jne    0x249
  37:	41 8b 1f             	mov    (%r15),%ebx
  3a:	31 ff                	xor    %edi,%edi
  3c:	89 de                	mov    %ebx,%esi
  3e:	e8                   	.byte 0xe8
  3f:	a9                   	.byte 0xa9