Oops: general protection fault, probably for non-canonical address 0xdffffc00000000e6: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000730-0x0000000000000737]
CPU: 1 UID: 0 PID: 6102 Comm: udevd Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
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:ffffc90000a089e8 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff88802ba58000 RCX: ffffffff87e73949
RDX: 00000000000000e6 RSI: ffffffff87e73786 RDI: ffff88802ba58128
RBP: ffff88802ba58128 R08: 0000000000000004 R09: 0000000000000020
R10: 0000000000000020 R11: 0000000000000000 R12: ffff88802ba580f0
R13: ffff88802ba58128 R14: ffff88802ba58740 R15: 0000000000000001
FS:  00007f72fc147880(0000) GS:ffff888123ed8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9612f87640 CR3: 00000000607a9000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 f_midi2_stop_eps drivers/usb/gadget/function/f_midi2.c:1246 [inline]
 f_midi2_set_alt+0x444/0x5f0 drivers/usb/gadget/function/f_midi2.c:1296
 composite_setup+0x16f8/0x9290 drivers/usb/gadget/composite.c:1933
 configfs_composite_setup+0xfb/0x130 drivers/usb/gadget/configfs.c:1877
 dummy_timer+0x2045/0x36f0 drivers/usb/gadget/udc/dummy_hcd.c:1951
 __run_hrtimer kernel/time/hrtimer.c:2032 [inline]
 __hrtimer_run_queues+0x462/0x9c0 kernel/time/hrtimer.c:2096
 hrtimer_run_softirq+0x17d/0x2c0 kernel/time/hrtimer.c:2113
 handle_softirqs+0x1ea/0x9b0 kernel/softirq.c:622
 __do_softirq kernel/softirq.c:656 [inline]
 invoke_softirq kernel/softirq.c:496 [inline]
 __irq_exit_rcu+0x162/0x210 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+0xa3/0xc0 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:rcu_read_lock_held_common kernel/rcu/update.c:105 [inline]
RIP: 0010:rcu_read_lock_held+0x9/0x50 kernel/rcu/update.c:349
Code: 65 fc ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 66 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa e8 97 ab cd 09 <ba> 01 00 00 00 85 c0 75 07 89 d0 c3 cc cc cc cc e8 82 df 00 00 84
RSP: 0018:ffffc9000443f910 EFLAGS: 00000246
RAX: 0000000000000001 RBX: ffff88801fabf3c0 RCX: ffffffff82beec96
RDX: ffff888032fc8000 RSI: ffffffff82beee19 RDI: ffff888032fc8000
RBP: ffff88802a5bf690 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001
R13: ffff88802a5bf690 R14: ffff88802af7c5e0 R15: ffffc9000443fb30
 kernfs_root+0x20e/0x2a0 fs/kernfs/kernfs-internal.h:77
 kernfs_dop_revalidate+0x96/0x7e0 fs/kernfs/dir.c:1216
 d_revalidate fs/namei.c:1035 [inline]
 d_revalidate fs/namei.c:1031 [inline]
 lookup_fast+0x3c7/0x600 fs/namei.c:1881
 walk_component fs/namei.c:2278 [inline]
 link_path_walk+0x7d4/0x1cc0 fs/namei.c:2656
 path_lookupat+0x74/0xc40 fs/namei.c:2812
 filename_lookup+0x202/0x590 fs/namei.c:2842
 vfs_statx+0xff/0x3f0 fs/stat.c:353
 vfs_fstatat+0x77/0xe0 fs/stat.c:373
 __do_sys_newfstatat+0x9d/0x120 fs/stat.c:538
 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: 0033:0x7f72fbb11b0a
Code: 48 8b 15 f1 f2 0d 00 f7 d8 64 89 02 b8 ff ff ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 41 89 ca b8 06 01 00 00 0f 05 <3d> 00 f0 ff ff 77 07 31 c0 c3 0f 1f 40 00 48 8b 15 b9 f2 0d 00 f7
RSP: 002b:00007ffe630cc438 EFLAGS: 00000206 ORIG_RAX: 0000000000000106
RAX: ffffffffffffffda RBX: 000055b4a31cc735 RCX: 00007f72fbb11b0a
RDX: 00007ffe630cc440 RSI: 00007ffe630cc4d0 RDI: 00000000ffffff9c
RBP: 000055b4df065400 R08: 000055b4a31cc735 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 000055b4df0654f0
R13: 00007ffe630cc4d0 R14: 00007ffe630cd9b0 R15: 000055b4a31d2bcc
 </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:ffffc90000a089e8 EFLAGS: 00010002
RAX: dffffc0000000000 RBX: ffff88802ba58000 RCX: ffffffff87e73949
RDX: 00000000000000e6 RSI: ffffffff87e73786 RDI: ffff88802ba58128
RBP: ffff88802ba58128 R08: 0000000000000004 R09: 0000000000000020
R10: 0000000000000020 R11: 0000000000000000 R12: ffff88802ba580f0
R13: ffff88802ba58128 R14: ffff88802ba58740 R15: 0000000000000001
FS:  00007f72fc147880(0000) GS:ffff888123ed8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f9612f87640 CR3: 00000000607a9000 CR4: 00000000003526f0
----------------
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