Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]
CPU: 2 UID: 0 PID: 13173 Comm: syz.3.1790 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: 0000:ffffc90005dff8a0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88802564e800 RCX: ffffc9000d1a1000
RDX: 0000000000000000 RSI: ffffffff88164ba3 RDI: ffff8880290cc3d0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888000160020
R13: ffff8880290ca000 R14: ffff8880223fa700 R15: ffff88802564e938
FS:  0000000000000000(0000) GS:ffff888096de3000(0063) knlGS:00000000f5455b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 0000000034308ff8 CR3: 0000000013fb2000 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_compat_sys_openat fs/open.c:1436 [inline]
 __se_compat_sys_openat fs/open.c:1434 [inline]
 __ia32_compat_sys_openat+0x12d/0x210 fs/open.c:1434
 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline]
 do_int80_emulation+0x14b/0x720 arch/x86/entry/syscall_32.c:172
 asm_int80_emulation+0x1a/0x20 arch/x86/include/asm/idtentry.h:598
RIP: 0023:0xf71b736b
Code: 57 56 53 8b 44 24 14 f6 00 08 75 23 8b 44 24 18 8b 5c 24 1c 8b 4c 24 20 8b 54 24 24 8b 74 24 28 8b 7c 24 2c 8b 6c 24 30 cd 80 <5b> 5e 5f 5d c3 5b 5e 5f 5d e9 f7 a1 ff ff 66 90 66 90 66 90 90 53
RSP: 002b:00000000f545503c EFLAGS: 00000246 ORIG_RAX: 0000000000000127
RAX: ffffffffffffffda RBX: 00000000ffffff9c RCX: 00000000f5455100
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </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: 0000:ffffc90005dff8a0 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffff88802564e800 RCX: ffffc9000d1a1000
RDX: 0000000000000000 RSI: ffffffff88164ba3 RDI: ffff8880290cc3d0
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888000160020
R13: ffff8880290ca000 R14: ffff8880223fa700 R15: ffff88802564e938
FS:  0000000000000000(0000) GS:ffff888096de3000(0063) knlGS:00000000f5455b40
CS:  0010 DS: 002b ES: 002b CR0: 0000000080050033
CR2: 00000000f5433ff4 CR3: 0000000013fb2000 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