general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 0 PID: 7376 Comm: syz.0.2405 Tainted: G        W         syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:set_link_state+0x2a/0x1050 drivers/usb/gadget/udc/dummy_hcd.c:451
Code: 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 38 49 89 fe 49 bf 00 00 00 00 00 fc ff df e8 5d f6 57 fe 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 67 6e 92 fe 49 8b 16 4d 8d ae 8b
RSP: 0018:ffffc90000dc77c0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff888100ba4c90 RCX: ffff88810bcbcf00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dc7820 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520001b8ef0 R12: 0000000000000a02
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa8b266a000 CR3: 0000000129ce8000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 dummy_pullup+0xd9/0x220 drivers/usb/gadget/udc/dummy_hcd.c:927
 usb_gadget_disconnect_locked+0x133/0x3b0 drivers/usb/gadget/udc/core.c:744
 usb_gadget_remove_driver+0x55/0x330 drivers/usb/gadget/udc/core.c:1492
 usb_gadget_unregister_driver+0x181/0x480 drivers/usb/gadget/udc/core.c:1656
 raw_release+0xda/0x260 drivers/usb/gadget/legacy/raw_gadget.c:415
 __fput+0x2dc/0x730 fs/file_table.c:281
 ____fput+0x15/0x20 fs/file_table.c:314
 task_work_run+0x127/0x190 kernel/task_work.c:189
 exit_task_work include/linux/task_work.h:33 [inline]
 do_exit+0xa7c/0x24e0 kernel/exit.c:879
 do_group_exit+0x149/0x310 kernel/exit.c:993
 get_signal+0xfb1/0x1300 kernel/signal.c:2802
 arch_do_signal_or_restart+0xe7/0x11b0 arch/x86/kernel/signal.c:805
 handle_signal_work kernel/entry/common.c:145 [inline]
 exit_to_user_mode_loop+0xa2/0xe0 kernel/entry/common.c:169
 exit_to_user_mode_prepare+0x76/0xa0 kernel/entry/common.c:199
 syscall_exit_to_user_mode+0x1d/0x40 kernel/entry/common.c:274
 do_syscall_64+0x3d/0x40 arch/x86/entry/common.c:56
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7ff8ab891d6b
Code: Unable to access opcode bytes at RIP 0x7ff8ab891d41.
RSP: 002b:00007ff8aa2e8f00 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffffc RBX: 0000000000000003 RCX: 00007ff8ab891d6b
RDX: 00007ff8aa2e9fd0 RSI: 0000000080085502 RDI: 0000000000000003
RBP: 00007ff8aa2e9fd0 R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000080085502
R13: 0000000800000000 R14: 0000000000000005 R15: 00007ff8ab9478e2
Modules linked in:
---[ end trace fe3a20893b03d30a ]---
RIP: 0010:set_link_state+0x2a/0x1050 drivers/usb/gadget/udc/dummy_hcd.c:451
Code: 55 48 89 e5 41 57 41 56 41 55 41 54 53 48 83 ec 38 49 89 fe 49 bf 00 00 00 00 00 fc ff df e8 5d f6 57 fe 4c 89 f0 48 c1 e8 03 <42> 80 3c 38 00 74 08 4c 89 f7 e8 67 6e 92 fe 49 8b 16 4d 8d ae 8b
RSP: 0018:ffffc90000dc77c0 EFLAGS: 00010046
RAX: 0000000000000000 RBX: ffff888100ba4c90 RCX: ffff88810bcbcf00
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: ffffc90000dc7820 R08: 0000000000000003 R09: 0000000000000004
R10: dffffc0000000000 R11: fffff520001b8ef0 R12: 0000000000000a02
R13: 0000000000000000 R14: 0000000000000000 R15: dffffc0000000000
FS:  0000000000000000(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa8b266a000 CR3: 0000000129ce8000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	55                   	push   %rbp
   1:	48 89 e5             	mov    %rsp,%rbp
   4:	41 57                	push   %r15
   6:	41 56                	push   %r14
   8:	41 55                	push   %r13
   a:	41 54                	push   %r12
   c:	53                   	push   %rbx
   d:	48 83 ec 38          	sub    $0x38,%rsp
  11:	49 89 fe             	mov    %rdi,%r14
  14:	49 bf 00 00 00 00 00 	movabs $0xdffffc0000000000,%r15
  1b:	fc ff df
  1e:	e8 5d f6 57 fe       	call   0xfe57f680
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 38 00       	cmpb   $0x0,(%rax,%r15,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 67 6e 92 fe       	call   0xfe926ea0
  39:	49 8b 16             	mov    (%r14),%rdx
  3c:	4d                   	rex.WRB
  3d:	8d                   	.byte 0x8d
  3e:	ae                   	scas   %es:(%rdi),%al
  3f:	8b                   	.byte 0x8b