general protection fault, probably for non-canonical address 0xdffffc000000000c: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000060-0x0000000000000067]
CPU: 1 PID: 4274 Comm: syz.0.8 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:dummy_queue+0x1a2/0x850 drivers/usb/gadget/udc/dummy_hcd.c:714
Code: fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 67 87 87 fb 4d 8b 24 24 49 83 c4 60 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 80 05 00 00 45 8b 24 24 44 89 e6 83 e6 02
RSP: 0018:ffffc90002faf9a8 EFLAGS: 00010206
RAX: 000000000000000c RBX: ffff888026f60b10 RCX: dffffc0000000000
RDX: 0000000000000002 RSI: 0000000000000003 RDI: 0000000000000005
RBP: 1ffff11004dec160 R08: ffff8880207bc00b R09: 1ffff110040f7801
R10: dffffc0000000000 R11: ffffed10040f7802 R12: 0000000000000060
R13: ffff888026f60b00 R14: ffff8880249b80e0 R15: ffff8880249b8c00
FS:  00007f9dd86776c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f26cf0d3e60 CR3: 000000002028d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 usb_ep_queue+0xe6/0x350 drivers/usb/gadget/udc/core.c:288
 raw_process_ep_io+0x5f7/0xc80 drivers/usb/gadget/legacy/raw_gadget.c:1061
 raw_ioctl_ep_write drivers/usb/gadget/legacy/raw_gadget.c:1101 [inline]
 raw_ioctl+0x20f7/0x3750 drivers/usb/gadget/legacy/raw_gadget.c:1274
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0xfa/0x170 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f9dda41ed6b
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:00007f9dd8675f60 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 00007f9dda41ed6b
RDX: 00007f9dd8675fe0 RSI: 0000000040085507 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00007f9dda7d1320 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000200000000180
R13: 0000000000000000 R14: 00007f9dda6a6fa0 R15: 00007ffe03769a58
 </TASK>
Modules linked in:
---[ end trace 9d77107cd0ff9b3e ]---
RIP: 0010:dummy_queue+0x1a2/0x850 drivers/usb/gadget/udc/dummy_hcd.c:714
Code: fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 67 87 87 fb 4d 8b 24 24 49 83 c4 60 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df <0f> b6 04 08 84 c0 0f 85 80 05 00 00 45 8b 24 24 44 89 e6 83 e6 02
RSP: 0018:ffffc90002faf9a8 EFLAGS: 00010206
RAX: 000000000000000c RBX: ffff888026f60b10 RCX: dffffc0000000000
RDX: 0000000000000002 RSI: 0000000000000003 RDI: 0000000000000005
RBP: 1ffff11004dec160 R08: ffff8880207bc00b R09: 1ffff110040f7801
R10: dffffc0000000000 R11: ffffed10040f7802 R12: 0000000000000060
R13: ffff888026f60b00 R14: ffff8880249b80e0 R15: ffff8880249b8c00
FS:  00007f9dd86776c0(0000) GS:ffff8880b9100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe624fd380 CR3: 000000002028d000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	fc                   	cld
   1:	ff                   	lcall  (bad)
   2:	df 80 3c 08 00 74    	filds  0x7400083c(%rax)
   8:	08 4c 89 e7          	or     %cl,-0x19(%rcx,%rcx,4)
   c:	e8 67 87 87 fb       	call   0xfb878778
  11:	4d 8b 24 24          	mov    (%r12),%r12
  15:	49 83 c4 60          	add    $0x60,%r12
  19:	4c 89 e0             	mov    %r12,%rax
  1c:	48 c1 e8 03          	shr    $0x3,%rax
  20:	48 b9 00 00 00 00 00 	movabs $0xdffffc0000000000,%rcx
  27:	fc ff df
* 2a:	0f b6 04 08          	movzbl (%rax,%rcx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 80 05 00 00    	jne    0x5b6
  36:	45 8b 24 24          	mov    (%r12),%r12d
  3a:	44 89 e6             	mov    %r12d,%esi
  3d:	83 e6 02             	and    $0x2,%esi