general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097]
CPU: 1 PID: 19686 Comm: syz-executor.2 Not tainted 6.0.0-rc3-next-20220829-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/22/2022
RIP: 0010:kernfs_ino include/linux/kernfs.h:358 [inline]
RIP: 0010:kernfs_get_inode+0x2e/0x520 fs/kernfs/inode.c:254
Code: 41 56 41 55 41 54 49 89 fc 53 48 89 f3 e8 fa 39 7e ff 48 8d bb 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 3a 04 00 00 48 8b b3 90 00 00 00 4c 89 e7 e8 69
RSP: 0018:ffffc90005757a30 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000b562000
RDX: 0000000000000012 RSI: ffffffff81fde8b6 RDI: 0000000000000090
RBP: ffffc90005757a50 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000008c07c R12: ffff888021a78000
R13: ffff888078c71800 R14: ffff88802d491d40 R15: ffff8880481da000
FS:  00007f9cfa999700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000001b2e121000 CR3: 0000000025d62000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 cgroup_may_write+0x86/0x120 kernel/cgroup/cgroup.c:4937
 cgroup_css_set_fork kernel/cgroup/cgroup.c:6233 [inline]
 cgroup_can_fork+0x962/0xec0 kernel/cgroup/cgroup.c:6327
 copy_process+0x4341/0x7110 kernel/fork.c:2359
 kernel_clone+0xe7/0xab0 kernel/fork.c:2673
 __do_sys_clone3+0x1cd/0x2e0 kernel/fork.c:2972
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f9cf9889279
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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f9cfa999038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007f9cf999bf80 RCX: 00007f9cf9889279
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00007f9cfa999050
RBP: 00007f9cf98e3189 R08: 0000000000000000 R09: 0000000000000058
R10: 00007f9cfa999050 R11: 0000000000000246 R12: 0000000000000058
R13: 00007ffda2826b7f R14: 00007f9cfa999300 R15: 0000000000022000
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:kernfs_ino include/linux/kernfs.h:358 [inline]
RIP: 0010:kernfs_get_inode+0x2e/0x520 fs/kernfs/inode.c:254
Code: 41 56 41 55 41 54 49 89 fc 53 48 89 f3 e8 fa 39 7e ff 48 8d bb 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 3a 04 00 00 48 8b b3 90 00 00 00 4c 89 e7 e8 69
RSP: 0018:ffffc90005757a30 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc9000b562000
RDX: 0000000000000012 RSI: ffffffff81fde8b6 RDI: 0000000000000090
RBP: ffffc90005757a50 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000000 R11: 000000000008c07c R12: ffff888021a78000
R13: ffff888078c71800 R14: ffff88802d491d40 R15: ffff8880481da000
FS:  00007f9cfa999700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f0dbaf6a1b8 CR3: 0000000025d62000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	41 56                	push   %r14
   2:	41 55                	push   %r13
   4:	41 54                	push   %r12
   6:	49 89 fc             	mov    %rdi,%r12
   9:	53                   	push   %rbx
   a:	48 89 f3             	mov    %rsi,%rbx
   d:	e8 fa 39 7e ff       	callq  0xff7e3a0c
  12:	48 8d bb 90 00 00 00 	lea    0x90(%rbx),%rdi
  19:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  20:	fc ff df
  23:	48 89 fa             	mov    %rdi,%rdx
  26:	48 c1 ea 03          	shr    $0x3,%rdx
* 2a:	80 3c 02 00          	cmpb   $0x0,(%rdx,%rax,1) <-- trapping instruction
  2e:	0f 85 3a 04 00 00    	jne    0x46e
  34:	48 8b b3 90 00 00 00 	mov    0x90(%rbx),%rsi
  3b:	4c 89 e7             	mov    %r12,%rdi
  3e:	e8                   	.byte 0xe8
  3f:	69                   	.byte 0x69