Oops: general protection fault, probably for non-canonical address 0xdffffc000000000a: 0000 [#1] PREEMPT SMP KASAN PTI
KASAN: null-ptr-deref in range [0x0000000000000050-0x0000000000000057]
CPU: 0 UID: 0 PID: 3808 Comm: syz.0.1102 Not tainted syzkaller #0 9a2c17613351c9eac8e18d74829f474689ac6bc1
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:dummy_queue+0x1c0/0x8e0 drivers/usb/gadget/udc/dummy_hcd.c:717
Code: fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 39 72 26 fe 4d 8b 24 24 49 83 c4 50 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 f5 05 00 00 45 8b 24 24 44 89 e6 83 e6 02
RSP: 0018:ffffc900071279a0 EFLAGS: 00010206
RAX: 000000000000000a RBX: ffff888118b19510 RCX: dffffc0000000000
RDX: ffff88813d084c00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: ffffc90007127a18 R08: 0000000000000003 R09: 0000000000000004
R10: 0000000000000000 R11: ffffffff83b9da20 R12: 0000000000000050
R13: ffff888118b19500 R14: 1ffff110231632a0 R15: ffff888104768c90
FS:  00007f5c571f76c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000010f8 CR3: 000000013114e000 CR4: 00000000003526b0
Call Trace:
 <TASK>
 usb_ep_queue+0xe3/0x230 drivers/usb/gadget/udc/core.c:305
 raw_process_ep_io+0x573/0x920 drivers/usb/gadget/legacy/raw_gadget.c:1114
 raw_ioctl_ep_write drivers/usb/gadget/legacy/raw_gadget.c:1153 [inline]
 raw_ioctl+0x223d/0x37a0 drivers/usb/gadget/legacy/raw_gadget.c:1325
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:907 [inline]
 __se_sys_ioctl+0x135/0x1b0 fs/ioctl.c:893
 __x64_sys_ioctl+0x7f/0xa0 fs/ioctl.c:893
 x64_sys_call+0x1878/0x2ee0 arch/x86/include/generated/asm/syscalls_64.h:17
 do_syscall_x64 arch/x86/entry/common.c:47 [inline]
 do_syscall_64+0x57/0xf0 arch/x86/entry/common.c:78
 entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x7f5c5879dd6b
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:00007f5c571f5f60 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: ffffffffffffff6d RCX: 00007f5c5879dd6b
RDX: 00007f5c571f5fe0 RSI: 0000000040085507 RDI: 0000000000000003
RBP: 0000000000000003 R08: 00007f5c58b50320 R09: 0000000000000000
R10: 0000000000000003 R11: 0000000000000246 R12: 0000200000000100
R13: 0000000000000000 R14: 00007f5c58a26180 R15: 00007fffccc03648
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:dummy_queue+0x1c0/0x8e0 drivers/usb/gadget/udc/dummy_hcd.c:717
Code: fc ff df 80 3c 08 00 74 08 4c 89 e7 e8 39 72 26 fe 4d 8b 24 24 49 83 c4 50 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 f5 05 00 00 45 8b 24 24 44 89 e6 83 e6 02
RSP: 0018:ffffc900071279a0 EFLAGS: 00010206
RAX: 000000000000000a RBX: ffff888118b19510 RCX: dffffc0000000000
RDX: ffff88813d084c00 RSI: 0000000000000003 RDI: 0000000000000005
RBP: ffffc90007127a18 R08: 0000000000000003 R09: 0000000000000004
R10: 0000000000000000 R11: ffffffff83b9da20 R12: 0000000000000050
R13: ffff888118b19500 R14: 1ffff110231632a0 R15: ffff888104768c90
FS:  00007f5c571f76c0(0000) GS:ffff8881f6e00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f7d407eb7c0 CR3: 000000013114e000 CR4: 00000000003526b0
----------------
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 39 72 26 fe       	call   0xfe26724a
  11:	4d 8b 24 24          	mov    (%r12),%r12
  15:	49 83 c4 50          	add    $0x50,%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 f5 05 00 00    	jne    0x62b
  36:	45 8b 24 24          	mov    (%r12),%r12d
  3a:	44 89 e6             	mov    %r12d,%esi
  3d:	83 e6 02             	and    $0x2,%esi