syzbot

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: 317 Comm: syz-executor244 Not tainted 5.15.106-syzkaller-00249-g19c0ed55a470 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023
RIP: 0010:__device_attach+0xb4/0x510 drivers/base/dd.c:950
Code: 5c 24 68 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 0d 77 d1 fe 4c 8b 2b 49 8d 9d d0 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 c8 03 00 00 0f b6 1b 89 de 83 e6 01 45
RSP: 0018:ffffc90000a47580 EFLAGS: 00010202
RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffff88811ea6e2c0
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90000a47500
RBP: ffffc90000a47650 R08: dffffc0000000000 R09: fffff52000148ea1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811eb3f030
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88811eb3f030
FS:  0000555555c5e300(0000) GS:ffff8881f7000000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000000 CR3: 000000011ad5a000 CR4: 00000000003506b0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 device_attach+0x17/0x20 drivers/base/dd.c:1017
 proc_ioctl+0x428/0x600 drivers/usb/core/devio.c:2344
 usbdev_ioctl+0x3070/0x5e20 drivers/usb/core/devio.c:2795
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:874 [inline]
 __se_sys_ioctl+0x114/0x190 fs/ioctl.c:860
 __x64_sys_ioctl+0x7b/0x90 fs/ioctl.c:860
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7fac62c9a859
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 14 00 00 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffed4099528 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fac62cde184 RCX: 00007fac62c9a859
RDX: 0000000020000080 RSI: 00000000c0105512 RDI: 0000000000000007
RBP: 00007ffed4099540 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000ffff R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffed409953c R14: 00007ffed4099560 R15: 00007ffed4099550
 </TASK>
Modules linked in:
---[ end trace 93bac0720e8cc2bd ]---
RIP: 0010:__device_attach+0xb4/0x510 drivers/base/dd.c:950
Code: 5c 24 68 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 0d 77 d1 fe 4c 8b 2b 49 8d 9d d0 00 00 00 48 89 d8 48 c1 e8 03 <42> 0f b6 04 30 84 c0 0f 85 c8 03 00 00 0f b6 1b 89 de 83 e6 01 45
RSP: 0018:ffffc90000a47580 EFLAGS: 00010202
RAX: 000000000000001a RBX: 00000000000000d0 RCX: ffff88811ea6e2c0
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90000a47500
RBP: ffffc90000a47650 R08: dffffc0000000000 R09: fffff52000148ea1
R10: 0000000000000000 R11: dffffc0000000001 R12: ffff88811eb3f030
R13: 0000000000000000 R14: dffffc0000000000 R15: ffff88811eb3f030
FS:  0000555555c5e300(0000) GS:ffff8881f7100000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fac62cca1f0 CR3: 000000011ad5a000 CR4: 00000000003506a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	5c                   	pop    %rsp
   1:	24 68                	and    $0x68,%al
   3:	48 89 d8             	mov    %rbx,%rax
   6:	48 c1 e8 03          	shr    $0x3,%rax
   a:	42 80 3c 30 00       	cmpb   $0x0,(%rax,%r14,1)
   f:	74 08                	je     0x19
  11:	48 89 df             	mov    %rbx,%rdi
  14:	e8 0d 77 d1 fe       	callq  0xfed17726
  19:	4c 8b 2b             	mov    (%rbx),%r13
  1c:	49 8d 9d d0 00 00 00 	lea    0xd0(%r13),%rbx
  23:	48 89 d8             	mov    %rbx,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 30       	movzbl (%rax,%r14,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 c8 03 00 00    	jne    0x3ff
  37:	0f b6 1b             	movzbl (%rbx),%ebx
  3a:	89 de                	mov    %ebx,%esi
  3c:	83 e6 01             	and    $0x1,%esi
  3f:	45                   	rex.RB