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: 21780 Comm: syz-executor Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
RIP: 0010:rb_first+0x1a/0x80 lib/rbtree.c:470
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 53 48 89 fa 48 c1 ea 03 48 83 ec 08 <80> 3c 02 00 75 4a 48 bb 00 00 00 00 00 fc ff df 48 8b 07 48 85 c0
RSP: 0000:ffffc900111c7ac8 EFLAGS: 00010292
RAX: dffffc0000000000 RBX: ffff88805ef9be10 RCX: ffffffff82691775
RDX: 0000000000000007 RSI: ffffffff8248422f RDI: 0000000000000038
RBP: ffff88805ef9bea8 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffea R11: ffffffff8227a1e4 R12: 1ffff92002238f6b
R13: 0000000000000000 R14: ffff88801e7b60a0 R15: 0000000000000038
FS:  000055556eff5500(0000) GS:ffff888124956000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000056518a3cfbf8 CR3: 0000000038343000 CR4: 00000000003526f0
DR0: 0000000000000001 DR1: fffffffffffffff7 DR2: 0000000000000000
DR3: 000000000000000a DR6: 00000000ffff0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 simple_xattrs_free+0x57/0x180 fs/xattr.c:1564
 __kernfs_new_node+0x7b4/0x990 fs/kernfs/dir.c:684
 kernfs_new_node+0x13c/0x1e0 fs/kernfs/dir.c:716
 kernfs_create_dir_ns+0x4c/0x1a0 fs/kernfs/dir.c:1086
 cgroup_create kernel/cgroup/cgroup.c:5859 [inline]
 cgroup_mkdir+0x40f/0x12e0 kernel/cgroup/cgroup.c:6007
 kernfs_iop_mkdir+0x111/0x190 fs/kernfs/dir.c:1271
 vfs_mkdir+0x731/0xb60 fs/namei.c:5130
 do_mkdirat+0x442/0x5e0 fs/namei.c:5164
 __do_sys_mkdirat fs/namei.c:5186 [inline]
 __se_sys_mkdirat fs/namei.c:5184 [inline]
 __x64_sys_mkdirat+0x83/0xb0 fs/namei.c:5184
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2d7798de97
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffefc3ec078 EFLAGS: 00000206 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007ffefc3ec0d0 RCX: 00007f2d7798de97
RDX: 00000000000001ff RSI: 00007ffefc3ec0d0 RDI: 00000000ffffff9c
RBP: 0000000000000001 R08: 0000000000000017 R09: 00007ffefc3ebdc7
R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000008
R13: 0000000000000003 R14: 00007ffefc3ec548 R15: 0000000000000000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:rb_first+0x1a/0x80 lib/rbtree.c:470
Code: 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 48 b8 00 00 00 00 00 fc ff df 53 48 89 fa 48 c1 ea 03 48 83 ec 08 <80> 3c 02 00 75 4a 48 bb 00 00 00 00 00 fc ff df 48 8b 07 48 85 c0
RSP: 0000:ffffc900111c7ac8 EFLAGS: 00010292
RAX: dffffc0000000000 RBX: ffff88805ef9be10 RCX: ffffffff82691775
RDX: 0000000000000007 RSI: ffffffff8248422f RDI: 0000000000000038
RBP: ffff88805ef9bea8 R08: 0000000000000005 R09: 0000000000000000
R10: 00000000ffffffea R11: ffffffff8227a1e4 R12: 1ffff92002238f6b
R13: 0000000000000000 R14: ffff88801e7b60a0 R15: 0000000000000038
FS:  000055556eff5500(0000) GS:ffff888124956000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fb0c8e34e9c CR3: 0000000038343000 CR4: 00000000003526f0
DR0: 0000000000000001 DR1: fffffffffffffff7 DR2: 0000000000000000
DR3: 000000000000000a DR6: 00000000ffff0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	90                   	nop
   1:	90                   	nop
   2:	90                   	nop
   3:	90                   	nop
   4:	90                   	nop
   5:	90                   	nop
   6:	90                   	nop
   7:	90                   	nop
   8:	90                   	nop
   9:	90                   	nop
   a:	90                   	nop
   b:	90                   	nop
   c:	90                   	nop
   d:	90                   	nop
   e:	90                   	nop
   f:	90                   	nop
  10:	f3 0f 1e fa          	endbr64
  14:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  1b:	fc ff df
  1e:	53                   	push   %rbx
  1f:	48 89 fa             	mov    %rdi,%rdx
  22:	48 c1 ea 03          	shr    $0x3,%rdx
  26:	48 83 ec 08          	sub    $0x8,%rsp
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	75 4a                	jne    0x7a
  30:	48 bb 00 00 00 00 00 	movabs $0xdffffc0000000000,%rbx
  37:	fc ff df
  3a:	48 8b 07             	mov    (%rdi),%rax
  3d:	48 85 c0             	test   %rax,%rax