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: 303 Comm: syz-executor306 Not tainted 5.4.210-syzkaller-00006-gc80a5b2e7f63 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 RIP: 0010:cgroup_ancestor include/linux/cgroup.h:590 [inline] RIP: 0010:____bpf_skb_ancestor_cgroup_id net/core/filter.c:4113 [inline] RIP: 0010:bpf_skb_ancestor_cgroup_id+0x111/0x280 net/core/filter.c:4102 Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 a0 64 14 fe 48 8b 1b 48 8d bb 1c 01 00 00 48 89 f8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 3e 01 00 00 8b ab 1c 01 00 00 89 ef 44 89 RSP: 0018:ffff8881dd5474b8 EFLAGS: 00010203 RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8881dd4faf40 RSI: 0000000000000080 RDI: 000000000000011c RBP: 0000000000000080 R08: ffffffff837f3ed7 R09: ffff8881dd547760 R10: ffffed103baa8eee R11: 1ffff1103baa8eec R12: dffffc0000000000 R13: fffffffae88603b8 R14: 0000000000000000 R15: ffff8881e042a012 FS: 0000555557497300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fac5fe95a70 CR3: 00000001dd508000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Modules linked in: ---[ end trace f03870950700aafb ]--- RIP: 0010:cgroup_ancestor include/linux/cgroup.h:590 [inline] RIP: 0010:____bpf_skb_ancestor_cgroup_id net/core/filter.c:4113 [inline] RIP: 0010:bpf_skb_ancestor_cgroup_id+0x111/0x280 net/core/filter.c:4102 Code: 02 00 00 48 89 d8 48 c1 e8 03 42 80 3c 20 00 74 08 48 89 df e8 a0 64 14 fe 48 8b 1b 48 8d bb 1c 01 00 00 48 89 f8 48 c1 e8 03 <42> 8a 04 20 84 c0 0f 85 3e 01 00 00 8b ab 1c 01 00 00 89 ef 44 89 RSP: 0018:ffff8881dd5474b8 EFLAGS: 00010203 RAX: 0000000000000023 RBX: 0000000000000000 RCX: 0000000000000000 RDX: ffff8881dd4faf40 RSI: 0000000000000080 RDI: 000000000000011c RBP: 0000000000000080 R08: ffffffff837f3ed7 R09: ffff8881dd547760 R10: ffffed103baa8eee R11: 1ffff1103baa8eec R12: dffffc0000000000 R13: fffffffae88603b8 R14: 0000000000000000 R15: ffff8881e042a012 FS: 0000555557497300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fac5fe95a70 CR3: 00000001dd508000 CR4: 00000000003406e0 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 a0 64 14 fe callq 0xfe1464b9 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 8a 04 20 mov (%rax,%r12,1),%al <-- trapping instruction 2e: 84 c0 test %al,%al 30: 0f 85 3e 01 00 00 jne 0x174 36: 8b ab 1c 01 00 00 mov 0x11c(%rbx),%ebp 3c: 89 ef mov %ebp,%edi 3e: 44 rex.R 3f: 89 .byte 0x89