audit: type=1400 audit(1765496130.825:13): avc:  denied  { associate } for  pid=4083 comm="syz-executor.1" name="syz0" scontext=system_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:cgroup_t:s0 tclass=filesystem permissive=1 srawcon=94
Oops: general protection fault, probably for non-canonical address 0xdffffc0000000007: 0000 [#1] SMP KASAN NOPTI
KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f]
CPU: 0 UID: 0 PID: 4085 Comm: syz-executor.1 Tainted: G        W           6.18.0-next-20251210 #1 PREEMPT(voluntary) 
Tainted: [W]=WARN
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014
RIP: 0010:simple_xattrs_free+0x60/0x1e0
Code: ea 03 80 3c 02 00 0f 85 8c 01 00 00 49 c7 04 24 00 00 00 00 e8 61 67 af ff 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 57 01 00 00 48 bd 00 00 00 00 00 fc ff df 49 8b
RSP: 0018:ffff88801b93f928 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: ffff888016245728 RCX: ffffc90002a20000
RDX: 0000000000000007 RSI: ffffffff81c64dbf RDI: 0000000000000038
RBP: 1ffff11003727f34 R08: 0000000000000001 R09: 0000000000000001
R10: 00000000ffffffea R11: 0000000000000000 R12: 0000000000000000
R13: ffff888016245718 R14: 0000000000000038 R15: ffff888008fee868
FS:  00007fc4d0c3e700(0000) GS:ffff8880e535c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd6d54bbe50 CR3: 00000000139a5000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
Call Trace:
 <TASK>
 __kernfs_new_node+0x77b/0x930
 kernfs_new_node+0x13c/0x1e0
 __kernfs_create_file+0x55/0x360
 cgroup_addrm_files+0x51c/0xbe0
 css_populate_dir+0x3c6/0x4d0
 cgroup_mkdir+0x87f/0x1120
 kernfs_iop_mkdir+0x111/0x190
 vfs_mkdir+0x7b5/0xba0
 do_mkdirat+0x11a/0x450
 __x64_sys_mkdirat+0x84/0xb0
 do_syscall_64+0xbf/0x420
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc4d36c8b19
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fc4d0c3e188 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fc4d37dbf60 RCX: 00007fc4d36c8b19
RDX: 00000000000001ff RSI: 00000000200000c0 RDI: ffffffffffffff9c
RBP: 00007fc4d3722f6d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff2614f2df R14: 00007fc4d0c3e300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:simple_xattrs_free+0x60/0x1e0
Code: ea 03 80 3c 02 00 0f 85 8c 01 00 00 49 c7 04 24 00 00 00 00 e8 61 67 af ff 4c 89 f2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 57 01 00 00 48 bd 00 00 00 00 00 fc ff df 49 8b
RSP: 0018:ffff88801b93f928 EFLAGS: 00010212
RAX: dffffc0000000000 RBX: ffff888016245728 RCX: ffffc90002a20000
RDX: 0000000000000007 RSI: ffffffff81c64dbf RDI: 0000000000000038
RBP: 1ffff11003727f34 R08: 0000000000000001 R09: 0000000000000001
R10: 00000000ffffffea R11: 0000000000000000 R12: 0000000000000000
R13: ffff888016245718 R14: 0000000000000038 R15: ffff888008fee868
FS:  00007fc4d0c3e700(0000) GS:ffff8880e535c000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd6d54bbe50 CR3: 00000000139a5000 CR4: 0000000000350ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600
netlink: 24 bytes leftover after parsing attributes in process `syz-executor.1'.
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	03 80 3c 02 00 0f    	add    0xf00023c(%rax),%eax
   6:	85 8c 01 00 00 49 c7 	test   %ecx,-0x38b70000(%rcx,%rax,1)
   d:	04 24                	add    $0x24,%al
   f:	00 00                	add    %al,(%rax)
  11:	00 00                	add    %al,(%rax)
  13:	e8 61 67 af ff       	callq  0xffaf6779
  18:	4c 89 f2             	mov    %r14,%rdx
  1b:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  22:	fc ff df
  25:	48 c1 ea 03          	shr    $0x3,%rdx
* 29:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2d:	0f 85 57 01 00 00    	jne    0x18a
  33:	48 bd 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbp
  3a:	fc ff df
  3d:	49                   	rex.WB
  3e:	8b                   	.byte 0x8b