kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 359 Comm: syz-executor297 Not tainted 5.4.242-syzkaller-00010-g39a9b92e9828 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
RIP: 0010:cgroup_ancestor include/linux/cgroup.h:591 [inline]
RIP: 0010:____bpf_skb_ancestor_cgroup_id net/core/filter.c:4125 [inline]
RIP: 0010:bpf_skb_ancestor_cgroup_id+0x114/0x270 net/core/filter.c:4114
Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 8d e5 0c 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:ffff8881dc7074b8 EFLAGS: 00010203
RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000000011c
RBP: 0000000000000080 R08: ffffffff8386fe5a R09: ffff8881dc707760
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: fffffff9fd7e08e5 R14: 0000000000000000 R15: ffff8881dc70e012
FS:  0000555556bec300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002000 CR3: 00000001dc5e2000 CR4: 00000000003406a0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
Modules linked in:
---[ end trace ff7ba8d24eccf9b3 ]---
RIP: 0010:cgroup_ancestor include/linux/cgroup.h:591 [inline]
RIP: 0010:____bpf_skb_ancestor_cgroup_id net/core/filter.c:4125 [inline]
RIP: 0010:bpf_skb_ancestor_cgroup_id+0x114/0x270 net/core/filter.c:4114
Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 8d e5 0c 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:ffff8881dc7074b8 EFLAGS: 00010203
RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000000011c
RBP: 0000000000000080 R08: ffffffff8386fe5a R09: ffff8881dc707760
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: fffffff9fd7e08e5 R14: 0000000000000000 R15: ffff8881dc70e012
FS:  0000555556bec300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020002000 CR3: 00000001dc5e2000 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       	callq  0x3c804210
   d:	20 00                	and    %al,(%rax)
   f:	74 08                	je     0x19
  11:	48 89 df             	mov    %rbx,%rdi
  14:	e8 8d e5 0c fe       	callq  0xfe0ce5a6
  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