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: 407 Comm: syz.0.17 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/16/2026
RIP: 0010:dummy_udc_start+0xbb/0x1d0 drivers/usb/gadget/udc/dummy_hcd.c:1003
Code: 00 00 ff 24 c5 00 6c e3 85 e8 21 02 25 fe eb 13 e8 1a 02 25 fe eb 0c e8 13 02 25 fe eb 05 e8 0c 02 25 fe 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 f7 e8 a6 8c 6a fe 4d 8b 36 4c 89 f7 e8
RSP: 0018:ffffc90000ae77e8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888118fe0010 RCX: ffff8881149e0000
RDX: 0000000000000000 RSI: ffffffff87585e20 RDI: 0000000000000003
RBP: ffffc90000ae7810 R08: ffff8881149e0000 R09: 0000000000000004
R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000003
FS:  00007f1e81fbf6c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f1e81187000 CR3: 000000010b273000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 usb_gadget_udc_start_locked drivers/usb/gadget/udc/core.c:1226 [inline]
 gadget_bind_driver+0x3c5/0x990 drivers/usb/gadget/udc/core.c:1628
 call_driver_probe drivers/base/dd.c:-1 [inline]
 really_probe+0x2d7/0x9a0 drivers/base/dd.c:639
 __driver_probe_device+0x193/0x270 drivers/base/dd.c:808
 driver_probe_device+0x54/0x3e0 drivers/base/dd.c:838
 __driver_attach+0x41a/0x5d0 drivers/base/dd.c:1224
 bus_for_each_dev+0x18c/0x200 drivers/base/bus.c:303
 driver_attach+0x42/0x50 drivers/base/dd.c:1241
 bus_add_driver+0x322/0x560 drivers/base/bus.c:620
 driver_register+0x335/0x440 drivers/base/driver.c:246
 usb_gadget_register_driver_owner+0xf8/0x270 drivers/usb/gadget/udc/core.c:1713
 raw_ioctl_run drivers/usb/gadget/legacy/raw_gadget.c:549 [inline]
 raw_ioctl+0x112c/0x3180 drivers/usb/gadget/legacy/raw_gadget.c:1262
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:870 [inline]
 __se_sys_ioctl+0x12f/0x1b0 fs/ioctl.c:856
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:856
 x64_sys_call+0x58b/0x9a0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:46 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f1e8119db2b
Code: 00 48 89 44 24 18 31 c0 48 8d 44 24 60 c7 04 24 10 00 00 00 48 89 44 24 08 48 8d 44 24 20 48 89 44 24 10 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 1c 48 8b 44 24 18 64 48 2b 04 25 28 00 00
RSP: 002b:00007f1e81fbcf00 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 00007f1e8119db2b
RDX: 0000000000000000 RSI: 0000000000005501 RDI: 0000000000000004
RBP: 00007f1e81fbdfd0 R08: 0000000000000001 R09: 00000000ffffffff
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000200000001100 R14: 0000000000000000 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dummy_udc_start+0xbb/0x1d0 drivers/usb/gadget/udc/dummy_hcd.c:1003
Code: 00 00 ff 24 c5 00 6c e3 85 e8 21 02 25 fe eb 13 e8 1a 02 25 fe eb 0c e8 13 02 25 fe eb 05 e8 0c 02 25 fe 4c 89 f0 48 c1 e8 03 <42> 80 3c 20 00 74 08 4c 89 f7 e8 a6 8c 6a fe 4d 8b 36 4c 89 f7 e8
RSP: 0018:ffffc90000ae77e8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff888118fe0010 RCX: ffff8881149e0000
RDX: 0000000000000000 RSI: ffffffff87585e20 RDI: 0000000000000003
RBP: ffffc90000ae7810 R08: ffff8881149e0000 R09: 0000000000000004
R10: 0000000000000005 R11: 0000000000000000 R12: dffffc0000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000003
FS:  00007f1e81fbf6c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555ba33a8318 CR3: 000000010b273000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	00 00                	add    %al,(%rax)
   2:	ff 24 c5 00 6c e3 85 	jmp    *-0x7a1c9400(,%rax,8)
   9:	e8 21 02 25 fe       	call   0xfe25022f
   e:	eb 13                	jmp    0x23
  10:	e8 1a 02 25 fe       	call   0xfe25022f
  15:	eb 0c                	jmp    0x23
  17:	e8 13 02 25 fe       	call   0xfe25022f
  1c:	eb 05                	jmp    0x23
  1e:	e8 0c 02 25 fe       	call   0xfe25022f
  23:	4c 89 f0             	mov    %r14,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 80 3c 20 00       	cmpb   $0x0,(%rax,%r12,1) <-- trapping instruction
  2f:	74 08                	je     0x39
  31:	4c 89 f7             	mov    %r14,%rdi
  34:	e8 a6 8c 6a fe       	call   0xfe6a8cdf
  39:	4d 8b 36             	mov    (%r14),%r14
  3c:	4c 89 f7             	mov    %r14,%rdi
  3f:	e8                   	.byte 0xe8