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: 304 Comm: syz-executor299 Not tainted 5.4.180-syzkaller-00005-gb2ca0128d238 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:____bpf_skb_cgroup_id net/core/filter.c:4089 [inline] RIP: 0010:bpf_skb_cgroup_id+0x10c/0x190 net/core/filter.c:4080 Code: c7 a0 02 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 13 44 2a fe bb 40 01 00 00 49 03 1f 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 f5 43 2a fe 48 8b 1b 48 83 c3 68 RSP: 0018:ffff8881dda7fa90 EFLAGS: 00010206 RAX: 0000000000000028 RBX: 0000000000000140 RCX: ffff8881dda6af40 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000000 RBP: ffff8881dda7fae0 R08: ffffffff83625ac3 R09: ffff8881dda7fb70 R10: ffffed103bb4ff70 R11: 1ffff1103bb4ff6e R12: dffffc0000000000 R13: 0000000000008000 R14: ffff8881e25c6012 R15: ffff8881e25c62a0 FS: 0000555556514300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001914258 CR3: 00000001e2fcc000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: Modules linked in: ---[ end trace 459a933a507aa508 ]--- RIP: 0010:____bpf_skb_cgroup_id net/core/filter.c:4089 [inline] RIP: 0010:bpf_skb_cgroup_id+0x10c/0x190 net/core/filter.c:4080 Code: c7 a0 02 00 00 4c 89 f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 13 44 2a fe bb 40 01 00 00 49 03 1f 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 f5 43 2a fe 48 8b 1b 48 83 c3 68 RSP: 0018:ffff8881dda7fa90 EFLAGS: 00010206 RAX: 0000000000000028 RBX: 0000000000000140 RCX: ffff8881dda6af40 RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000000000000000 RBP: ffff8881dda7fae0 R08: ffffffff83625ac3 R09: ffff8881dda7fb70 R10: ffffed103bb4ff70 R11: 1ffff1103bb4ff6e R12: dffffc0000000000 R13: 0000000000008000 R14: ffff8881e25c6012 R15: ffff8881e25c62a0 FS: 0000555556514300(0000) GS:ffff8881f6f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000001914258 CR3: 00000001e2fcc000 CR4: 00000000003406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: a0 02 00 00 4c 89 f8 movabs 0xc148f8894c000002,%al 7: 48 c1 9: e8 03 42 80 3c callq 0x3c804211 e: 20 00 and %al,(%rax) 10: 74 08 je 0x1a 12: 4c 89 ff mov %r15,%rdi 15: e8 13 44 2a fe callq 0xfe2a442d 1a: bb 40 01 00 00 mov $0x140,%ebx 1f: 49 03 1f add (%r15),%rbx 22: 48 89 d8 mov %rbx,%rax 25: 48 c1 e8 03 shr $0x3,%rax * 29: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2e: 74 08 je 0x38 30: 48 89 df mov %rbx,%rdi 33: e8 f5 43 2a fe callq 0xfe2a442d 38: 48 8b 1b mov (%rbx),%rbx 3b: 48 83 c3 68 add $0x68,%rbx