general protection fault, probably for non-canonical address 0xdffffc0000000029: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000148-0x000000000000014f] CPU: 1 PID: 28674 Comm: syz-executor.0 Not tainted 5.15.0-rc1-next-20210915-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:cgroup_id include/linux/cgroup.h:312 [inline] RIP: 0010:__bpf_sk_cgroup_id net/core/filter.c:4468 [inline] RIP: 0010:____bpf_skb_cgroup_id net/core/filter.c:4473 [inline] RIP: 0010:bpf_skb_cgroup_id+0x138/0x210 net/core/filter.c:4471 Code: 03 80 3c 02 00 0f 85 cc 00 00 00 48 8b 9b 58 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 48 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ad 00 00 00 48 8b 9b 48 01 00 00 48 b8 00 00 00 RSP: 0018:ffffc90004c979c0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002e31000 RDX: 0000000000000029 RSI: ffffffff8726be07 RDI: 0000000000000148 RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000007 R10: ffffffff8726bdfa R11: 000000000000001f R12: 0000000000000007 R13: ffffc9000117c000 R14: ffffc90004c97c30 R15: ffffc9000117c048 FS: 00007f0640ca1700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2e924000 CR3: 000000007984a000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bpf_prog_a196c95e32f32915+0x10/0xdd0 bpf_dispatcher_nop_func include/linux/bpf.h:718 [inline] __bpf_prog_run include/linux/filter.h:626 [inline] bpf_prog_run include/linux/filter.h:633 [inline] bpf_test_run+0x381/0xa30 net/bpf/test_run.c:119 bpf_prog_test_run_skb+0xac5/0x1d20 net/bpf/test_run.c:657 bpf_prog_test_run kernel/bpf/syscall.c:3307 [inline] __sys_bpf+0x2137/0x5df0 kernel/bpf/syscall.c:4605 __do_sys_bpf kernel/bpf/syscall.c:4691 [inline] __se_sys_bpf kernel/bpf/syscall.c:4689 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4689 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+0x44/0xae RIP: 0033:0x4665f9 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 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f0640ca1188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 0000000000000028 RSI: 0000000020000440 RDI: 000000000000000a RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffca6c5803f R14: 00007f0640ca1300 R15: 0000000000022000 Modules linked in: ---[ end trace 5b0808ea27b67838 ]--- RIP: 0010:cgroup_id include/linux/cgroup.h:312 [inline] RIP: 0010:__bpf_sk_cgroup_id net/core/filter.c:4468 [inline] RIP: 0010:____bpf_skb_cgroup_id net/core/filter.c:4473 [inline] RIP: 0010:bpf_skb_cgroup_id+0x138/0x210 net/core/filter.c:4471 Code: 03 80 3c 02 00 0f 85 cc 00 00 00 48 8b 9b 58 04 00 00 48 b8 00 00 00 00 00 fc ff df 48 8d bb 48 01 00 00 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 ad 00 00 00 48 8b 9b 48 01 00 00 48 b8 00 00 00 RSP: 0018:ffffc90004c979c0 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc90002e31000 RDX: 0000000000000029 RSI: ffffffff8726be07 RDI: 0000000000000148 RBP: 0000000000000080 R08: 0000000000000000 R09: 0000000000000007 R10: ffffffff8726bdfa R11: 000000000000001f R12: 0000000000000007 R13: ffffc9000117c000 R14: ffffc90004c97c30 R15: ffffc9000117c048 FS: 00007f0640ca1700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f1c46208008 CR3: 000000007984a000 CR4: 00000000001526e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) 4: 0f 85 cc 00 00 00 jne 0xd6 a: 48 8b 9b 58 04 00 00 mov 0x458(%rbx),%rbx 11: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 18: fc ff df 1b: 48 8d bb 48 01 00 00 lea 0x148(%rbx),%rdi 22: 48 89 fa mov %rdi,%rdx 25: 48 c1 ea 03 shr $0x3,%rdx * 29: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2d: 0f 85 ad 00 00 00 jne 0xe0 33: 48 8b 9b 48 01 00 00 mov 0x148(%rbx),%rbx 3a: 48 rex.W 3b: b8 .byte 0xb8 3c: 00 00 add %al,(%rax)