diff options
Diffstat (limited to 'tools/testing/selftests/bpf/progs')
4 files changed, 117 insertions, 1 deletions
diff --git a/tools/testing/selftests/bpf/progs/bpf_tracing_net.h b/tools/testing/selftests/bpf/progs/bpf_tracing_net.h index b394817126cf..cfed4df490f3 100644 --- a/tools/testing/selftests/bpf/progs/bpf_tracing_net.h +++ b/tools/testing/selftests/bpf/progs/bpf_tracing_net.h @@ -50,6 +50,12 @@ #define ICSK_TIME_LOSS_PROBE 5 #define ICSK_TIME_REO_TIMEOUT 6 +#define ETH_HLEN 14 +#define ETH_P_IPV6 0x86DD + +#define CHECKSUM_NONE 0 +#define CHECKSUM_PARTIAL 3 + #define IFNAMSIZ 16 #define RTF_GATEWAY 0x0002 diff --git a/tools/testing/selftests/bpf/progs/decap_sanity.c b/tools/testing/selftests/bpf/progs/decap_sanity.c new file mode 100644 index 000000000000..bd3c657c58a7 --- /dev/null +++ b/tools/testing/selftests/bpf/progs/decap_sanity.c @@ -0,0 +1,68 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Copyright (c) 2022 Meta Platforms, Inc. and affiliates. */ + +#include "vmlinux.h" +#include "bpf_tracing_net.h" +#include <bpf/bpf_helpers.h> +#include <bpf/bpf_endian.h> + +#define UDP_TEST_PORT 7777 + +void *bpf_cast_to_kern_ctx(void *) __ksym; +bool init_csum_partial = false; +bool final_csum_none = false; +bool broken_csum_start = false; + +static unsigned int skb_headlen(const struct sk_buff *skb) +{ + return skb->len - skb->data_len; +} + +static unsigned int skb_headroom(const struct sk_buff *skb) +{ + return skb->data - skb->head; +} + +static int skb_checksum_start_offset(const struct sk_buff *skb) +{ + return skb->csum_start - skb_headroom(skb); +} + +SEC("tc") +int decap_sanity(struct __sk_buff *skb) +{ + struct sk_buff *kskb; + struct ipv6hdr ip6h; + struct udphdr udph; + int err; + + if (skb->protocol != __bpf_constant_htons(ETH_P_IPV6)) + return TC_ACT_SHOT; + + if (bpf_skb_load_bytes(skb, ETH_HLEN, &ip6h, sizeof(ip6h))) + return TC_ACT_SHOT; + + if (ip6h.nexthdr != IPPROTO_UDP) + return TC_ACT_SHOT; + + if (bpf_skb_load_bytes(skb, ETH_HLEN + sizeof(ip6h), &udph, sizeof(udph))) + return TC_ACT_SHOT; + + if (udph.dest != __bpf_constant_htons(UDP_TEST_PORT)) + return TC_ACT_SHOT; + + kskb = bpf_cast_to_kern_ctx(skb); + init_csum_partial = (kskb->ip_summed == CHECKSUM_PARTIAL); + err = bpf_skb_adjust_room(skb, -(s32)(ETH_HLEN + sizeof(ip6h) + sizeof(udph)), + 1, BPF_F_ADJ_ROOM_FIXED_GSO); + if (err) + return TC_ACT_SHOT; + final_csum_none = (kskb->ip_summed == CHECKSUM_NONE); + if (kskb->ip_summed == CHECKSUM_PARTIAL && + (unsigned int)skb_checksum_start_offset(kskb) >= skb_headlen(kskb)) + broken_csum_start = true; + + return TC_ACT_SHOT; +} + +char __license[] SEC("license") = "GPL"; diff --git a/tools/testing/selftests/bpf/progs/jeq_infer_not_null_fail.c b/tools/testing/selftests/bpf/progs/jeq_infer_not_null_fail.c new file mode 100644 index 000000000000..f46965053acb --- /dev/null +++ b/tools/testing/selftests/bpf/progs/jeq_infer_not_null_fail.c @@ -0,0 +1,42 @@ +// SPDX-License-Identifier: GPL-2.0 + +#include "vmlinux.h" +#include <bpf/bpf_helpers.h> +#include "bpf_misc.h" + +char _license[] SEC("license") = "GPL"; + +struct { + __uint(type, BPF_MAP_TYPE_HASH); + __uint(max_entries, 1); + __type(key, u64); + __type(value, u64); +} m_hash SEC(".maps"); + +SEC("?raw_tp") +__failure __msg("R8 invalid mem access 'map_value_or_null") +int jeq_infer_not_null_ptr_to_btfid(void *ctx) +{ + struct bpf_map *map = (struct bpf_map *)&m_hash; + struct bpf_map *inner_map = map->inner_map_meta; + u64 key = 0, ret = 0, *val; + + val = bpf_map_lookup_elem(map, &key); + /* Do not mark ptr as non-null if one of them is + * PTR_TO_BTF_ID (R9), reject because of invalid + * access to map value (R8). + * + * Here, we need to inline those insns to access + * R8 directly, since compiler may use other reg + * once it figures out val==inner_map. + */ + asm volatile("r8 = %[val];\n" + "r9 = %[inner_map];\n" + "if r8 != r9 goto +1;\n" + "%[ret] = *(u64 *)(r8 +0);\n" + : [ret] "+r"(ret) + : [inner_map] "r"(inner_map), [val] "r"(val) + : "r8", "r9"); + + return ret; +} diff --git a/tools/testing/selftests/bpf/progs/profiler.inc.h b/tools/testing/selftests/bpf/progs/profiler.inc.h index 92331053dba3..7bd76b9e0f98 100644 --- a/tools/testing/selftests/bpf/progs/profiler.inc.h +++ b/tools/testing/selftests/bpf/progs/profiler.inc.h @@ -826,7 +826,7 @@ out: SEC("kprobe/vfs_link") int BPF_KPROBE(kprobe__vfs_link, - struct dentry* old_dentry, struct user_namespace *mnt_userns, + struct dentry* old_dentry, struct mnt_idmap *idmap, struct inode* dir, struct dentry* new_dentry, struct inode** delegated_inode) { |