netlink: 'syz.3.113': attribute type 21 has an invalid length.
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 1 UID: 0 PID: 6317 Comm: syz.3.113 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:subdev_open+0x193/0x510 drivers/media/v4l2-core/v4l2-subdev.c:115
Code: 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 bc 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 2c 24 48 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 04 03 00 00 48 8b 6d 00 48 85 ed 0f 84 95 00 00
RSP: 0018:ffffc900031d78a0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8880571c0400 RCX: ffffc900078e3000
RDX: 0000000000000000 RSI: ffffffff88185523 RDI: ffff88802f1853d0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88802f362020
R13: ffff88802f457000 R14: ffff88802c278e00 R15: ffff8880571c0538
FS:  00007fa211fb06c0(0000) GS:ffff8880d5ed8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fa211187640 CR3: 0000000059fe8000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 v4l2_open+0x1d2/0x490 drivers/media/v4l2-core/v4l2-dev.c:433
 chrdev_open+0x234/0x6a0 fs/char_dev.c:411
 do_dentry_open+0x6ab/0x14d0 fs/open.c:947
 vfs_open+0x82/0x3f0 fs/open.c:1052
 do_open fs/namei.c:4700 [inline]
 path_openat+0x2873/0x4280 fs/namei.c:4863
 do_file_open+0x20e/0x430 fs/namei.c:4892
 do_sys_openat2+0x10f/0x1e0 fs/open.c:1368
 do_sys_open fs/open.c:1374 [inline]
 __do_sys_openat fs/open.c:1390 [inline]
 __se_sys_openat fs/open.c:1385 [inline]
 __x64_sys_openat+0x12d/0x210 fs/open.c:1385
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0x115/0x870 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa21115e84e
Code: 08 0f 85 a5 a8 ff ff 49 89 fb 48 89 f0 48 89 d7 48 89 ce 4c 89 c2 4d 89 ca 4c 8b 44 24 08 4c 8b 4c 24 10 4c 89 5c 24 08 0f 05 <c3> 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 80 00 00 00 00 48 83 ec 08
RSP: 002b:00007fa211fafb28 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fa211fb06c0 RCX: 00007fa21115e84e
RDX: 0000000000000000 RSI: 00007fa211fafc00 RDI: ffffffffffffff9c
RBP: 00007fa211fafc00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: cccccccccccccccd
R13: 00007fa211426038 R14: 00007fa211425fa0 R15: 00007ffc70d5cd98
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:subdev_open+0x193/0x510 drivers/media/v4l2-core/v4l2-subdev.c:115
Code: 00 00 00 00 fc ff df 48 c1 ea 03 80 3c 02 00 0f 85 bc 02 00 00 48 b8 00 00 00 00 00 fc ff df 49 8b 2c 24 48 89 ea 48 c1 ea 03 <80> 3c 02 00 0f 85 04 03 00 00 48 8b 6d 00 48 85 ed 0f 84 95 00 00
RSP: 0018:ffffc900031d78a0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff8880571c0400 RCX: ffffc900078e3000
RDX: 0000000000000000 RSI: ffffffff88185523 RDI: ffff88802f1853d0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff88802f362020
R13: ffff88802f457000 R14: ffff88802c278e00 R15: ffff8880571c0538
FS:  00007fa211fb06c0(0000) GS:ffff8880d5dd8000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000562e687e5fe0 CR3: 0000000059fe8000 CR4: 0000000000352ef0
----------------
Code disassembly (best guess), 7 bytes skipped:
   0:	48 c1 ea 03          	shr    $0x3,%rdx
   4:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1)
   8:	0f 85 bc 02 00 00    	jne    0x2ca
   e:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  15:	fc ff df
  18:	49 8b 2c 24          	mov    (%r12),%rbp
  1c:	48 89 ea             	mov    %rbp,%rdx
  1f:	48 c1 ea 03          	shr    $0x3,%rdx
* 23:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  27:	0f 85 04 03 00 00    	jne    0x331
  2d:	48 8b 6d 00          	mov    0x0(%rbp),%rbp
  31:	48 85 ed             	test   %rbp,%rbp
  34:	0f                   	.byte 0xf
  35:	84                   	.byte 0x84
  36:	95                   	xchg   %eax,%ebp