general protection fault, probably for non-canonical address 0xdffffc000000001a: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x00000000000000d0-0x00000000000000d7]
CPU: 0 PID: 384 Comm: syz-executor.3 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
RIP: 0010:__device_attach+0xae/0x410 drivers/base/dd.c:908
Code: 8d 66 68 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 e7 e8 64 bc ee fe 4d 8b 2c 24 4d 8d a5 d0 00 00 00 4c 89 e0 48 c1 e8 03 <0f> b6 04 18 84 c0 0f 85 31 03 00 00 41 0f b6 1c 24 89 de 83 e6 01
RSP: 0018:ffffc90001237bc0 EFLAGS: 00010202
RAX: 000000000000001a RBX: dffffc0000000000 RCX: ffffffff8481eb42
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90001237b40
RBP: ffffc90001237c78 R08: ffffc90001237b47 R09: 1ffff92000246f68
R10: dffffc0000000000 R11: fffff52000246f69 R12: 00000000000000d0
R13: 0000000000000000 R14: ffff8881118ba830 R15: 0000000000000000
FS:  00007f29a51db6c0(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f29a5198fd0 CR3: 0000000123c3b000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 device_attach+0x17/0x20 drivers/base/dd.c:975
 proc_ioctl+0x3f6/0x5e0 drivers/usb/core/devio.c:2272
 proc_ioctl_default+0xc1/0x100 drivers/usb/core/devio.c:2307
 usbdev_do_ioctl drivers/usb/core/devio.c:2663 [inline]
 usbdev_ioctl+0x159f/0x1f10 drivers/usb/core/devio.c:2723
 vfs_ioctl fs/ioctl.c:48 [inline]
 __do_sys_ioctl fs/ioctl.c:753 [inline]
 __se_sys_ioctl+0x121/0x1a0 fs/ioctl.c:739
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:739
 do_syscall_64+0x31/0x40 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f29a5648fb9
Code: 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 d0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f29a51db0b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f29a5787f80 RCX: 00007f29a5648fb9
RDX: 0000000020000080 RSI: 00000000c0105512 RDI: 0000000000000006
RBP: 00007f29a56beb38 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f29a5787f80 R15: 00007ffde5607bf8
Modules linked in:
---[ end trace 8d2f7ce1834b3ed4 ]---
RIP: 0010:__device_attach+0xae/0x410 drivers/base/dd.c:908
Code: 8d 66 68 4c 89 e0 48 c1 e8 03 80 3c 18 00 74 08 4c 89 e7 e8 64 bc ee fe 4d 8b 2c 24 4d 8d a5 d0 00 00 00 4c 89 e0 48 c1 e8 03 <0f> b6 04 18 84 c0 0f 85 31 03 00 00 41 0f b6 1c 24 89 de 83 e6 01
RSP: 0018:ffffc90001237bc0 EFLAGS: 00010202
RAX: 000000000000001a RBX: dffffc0000000000 RCX: ffffffff8481eb42
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90001237b40
RBP: ffffc90001237c78 R08: ffffc90001237b47 R09: 1ffff92000246f68
R10: dffffc0000000000 R11: fffff52000246f69 R12: 00000000000000d0
R13: 0000000000000000 R14: ffff8881118ba830 R15: 0000000000000000
FS:  00007f29a51db6c0(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f29a568a3d0 CR3: 0000000123c3b000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	8d 66 68             	lea    0x68(%rsi),%esp
   3:	4c 89 e0             	mov    %r12,%rax
   6:	48 c1 e8 03          	shr    $0x3,%rax
   a:	80 3c 18 00          	cmpb   $0x0,(%rax,%rbx,1)
   e:	74 08                	je     0x18
  10:	4c 89 e7             	mov    %r12,%rdi
  13:	e8 64 bc ee fe       	call   0xfeeebc7c
  18:	4d 8b 2c 24          	mov    (%r12),%r13
  1c:	4d 8d a5 d0 00 00 00 	lea    0xd0(%r13),%r12
  23:	4c 89 e0             	mov    %r12,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	0f b6 04 18          	movzbl (%rax,%rbx,1),%eax <-- trapping instruction
  2e:	84 c0                	test   %al,%al
  30:	0f 85 31 03 00 00    	jne    0x367
  36:	41 0f b6 1c 24       	movzbl (%r12),%ebx
  3b:	89 de                	mov    %ebx,%esi
  3d:	83 e6 01             	and    $0x1,%esi