kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 420 Comm: syz-executor.0 Not tainted 5.4.283-syzkaller-04984-ge6ac8beecb16 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
RIP: 0010:cgroup_ancestor include/linux/cgroup.h:591 [inline]
RIP: 0010:____bpf_skb_ancestor_cgroup_id net/core/filter.c:4151 [inline]
RIP: 0010:bpf_skb_ancestor_cgroup_id+0x114/0x270 net/core/filter.c:4140
Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 ad dd 0b fe 48 8b 1b 48 8d bb 1c 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 2f 01 00 00 8b ab 1c 01 00 00 89 ef 44
RSP: 0018:ffff8881ef2f7638 EFLAGS: 00010203
RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000000011c
RBP: 0000000000000080 R08: ffffffff8388414a R09: ffff8881ef2f7760
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: fffffff507901ac0 R14: 0000000003430000 R15: ffff8881ef1a0012
FS:  00007f773c0736c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f773c61c0c0 CR3: 00000001da1c4000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 bpf_prog_ef2ff791a4349a5c+0x626/0x1000
 bpf_call_func include/linux/filter.h:627 [inline]
 bpf_test_run+0x2ae/0x6c0 net/bpf/test_run.c:44
 bpf_prog_test_run_skb+0x73c/0xf00 net/bpf/test_run.c:311
 bpf_prog_test_run kernel/bpf/syscall.c:2124 [inline]
 __do_sys_bpf kernel/bpf/syscall.c:2909 [inline]
 __se_sys_bpf+0x2e37/0xbcb0 kernel/bpf/syscall.c:2849
 do_syscall_64+0xca/0x1c0 arch/x86/entry/common.c:290
 entry_SYSCALL_64_after_hwframe+0x5c/0xc1
RIP: 0033:0x7f773c4f0d29
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f773c0730c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007f773c61ff80 RCX: 00007f773c4f0d29
RDX: 0000000000000050 RSI: 0000000020000080 RDI: 000000000000000a
RBP: 00007f773c53d47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007f773c61ff80 R15: 00007ffc666fb0a8
Modules linked in:
---[ end trace 5ca13602648f4bdc ]---
RIP: 0010:cgroup_ancestor include/linux/cgroup.h:591 [inline]
RIP: 0010:____bpf_skb_ancestor_cgroup_id net/core/filter.c:4151 [inline]
RIP: 0010:bpf_skb_ancestor_cgroup_id+0x114/0x270 net/core/filter.c:4140
Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 ad dd 0b fe 48 8b 1b 48 8d bb 1c 01 00 00 48 89 f8 48 c1 e8 03 <42> 0f b6 04 20 84 c0 0f 85 2f 01 00 00 8b ab 1c 01 00 00 89 ef 44
RSP: 0018:ffff8881ef2f7638 EFLAGS: 00010203
RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000000011c
RBP: 0000000000000080 R08: ffffffff8388414a R09: ffff8881ef2f7760
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: fffffff507901ac0 R14: 0000000003430000 R15: ffff8881ef1a0012
FS:  00007f773c0736c0(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f773c61c0c0 CR3: 00000001da1c4000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess):
   0:	02 00                	add    (%rax),%al
   2:	00 48 89             	add    %cl,-0x77(%rax)
   5:	d8 48 c1             	fmuls  -0x3f(%rax)
   8:	e8 03 42 80 3c       	call   0x3c804210
   d:	20 00                	and    %al,(%rax)
   f:	74 08                	je     0x19
  11:	48 89 df             	mov    %rbx,%rdi
  14:	e8 ad dd 0b fe       	call   0xfe0bddc6
  19:	48 8b 1b             	mov    (%rbx),%rbx
  1c:	48 8d bb 1c 01 00 00 	lea    0x11c(%rbx),%rdi
  23:	48 89 f8             	mov    %rdi,%rax
  26:	48 c1 e8 03          	shr    $0x3,%rax
* 2a:	42 0f b6 04 20       	movzbl (%rax,%r12,1),%eax <-- trapping instruction
  2f:	84 c0                	test   %al,%al
  31:	0f 85 2f 01 00 00    	jne    0x166
  37:	8b ab 1c 01 00 00    	mov    0x11c(%rbx),%ebp
  3d:	89 ef                	mov    %ebp,%edi
  3f:	44                   	rex.R