netlink: 16 bytes leftover after parsing attributes in process `syz.1.3894'.
------------[ cut here ]------------
refcount_t: addition on 0; use-after-free.
WARNING: lib/refcount.c:25 at refcount_warn_saturate+0x111/0x130 lib/refcount.c:25, CPU#0: syz.1.3894/26085
Modules linked in:
CPU: 0 UID: 0 PID: 26085 Comm: syz.1.3894 Tainted: G     U       L      syzkaller #0 PREEMPT(full) 
Tainted: [U]=USER, [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026
RIP: 0010:refcount_warn_saturate+0x111/0x130 lib/refcount.c:25
Code: cc e8 53 81 09 fd 48 8d 3d 0c 76 e7 0b 67 48 0f b9 3a e8 42 81 09 fd 5b 5d e9 5b 16 9e 06 e8 36 81 09 fd 48 8d 3d ff 75 e7 0b <67> 48 0f b9 3a e8 25 81 09 fd 5b 5d e9 3e 16 9e 06 48 89 df e8 d6
RSP: 0018:ffffc900039178c0 EFLAGS: 00010287
RAX: 0000000000000a56 RBX: ffff88823bf50f10 RCX: ffffc900104f2000
RDX: 0000000000080000 RSI: ffffffff84ff5b0a RDI: ffffffff90e6d110
RBP: 0000000000000002 R08: 0000000000000005 R09: 0000000000000004
R10: 0000000000000002 R11: 0000000000000000 R12: ffff888056177340
R13: ffff88802c36c400 R14: ffff88802c731f70 R15: ffff88823bf50f10
FS:  00007f9f11c416c0(0000) GS:ffff8881242e7000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88823bf50f18 CR3: 00000000886de000 CR4: 00000000003526f0
Call Trace:
 <TASK>
 __refcount_add include/linux/refcount.h:289 [inline]
 __refcount_inc include/linux/refcount.h:366 [inline]
 refcount_inc include/linux/refcount.h:383 [inline]
 kref_get include/linux/kref.h:45 [inline]
 dvb_device_get drivers/media/dvb-core/dvbdev.c:621 [inline]
 dvb_device_open+0x304/0x3b0 drivers/media/dvb-core/dvbdev.c:106
 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:4859
 do_file_open+0x20e/0x430 fs/namei.c:4888
 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+0x115/0x840 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f9f10d9ce59
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9f11c41028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007f9f11015fa0 RCX: 00007f9f10d9ce59
RDX: 0000000000000001 RSI: 0000200000000000 RDI: ffffffffffffff9c
RBP: 00007f9f10e32e6f R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f9f11016038 R14: 00007f9f11015fa0 R15: 00007fff3ed67618
 </TASK>
----------------
Code disassembly (best guess):
   0:	cc                   	int3
   1:	e8 53 81 09 fd       	call   0xfd098159
   6:	48 8d 3d 0c 76 e7 0b 	lea    0xbe7760c(%rip),%rdi        # 0xbe77619
   d:	67 48 0f b9 3a       	ud1    (%edx),%rdi
  12:	e8 42 81 09 fd       	call   0xfd098159
  17:	5b                   	pop    %rbx
  18:	5d                   	pop    %rbp
  19:	e9 5b 16 9e 06       	jmp    0x69e1679
  1e:	e8 36 81 09 fd       	call   0xfd098159
  23:	48 8d 3d ff 75 e7 0b 	lea    0xbe775ff(%rip),%rdi        # 0xbe77629
* 2a:	67 48 0f b9 3a       	ud1    (%edx),%rdi <-- trapping instruction
  2f:	e8 25 81 09 fd       	call   0xfd098159
  34:	5b                   	pop    %rbx
  35:	5d                   	pop    %rbp
  36:	e9 3e 16 9e 06       	jmp    0x69e1679
  3b:	48 89 df             	mov    %rbx,%rdi
  3e:	e8                   	.byte 0xe8
  3f:	d6                   	(bad)