diff options
| author | Hou Tao <houtao1@huawei.com> | 2021-10-25 14:40:23 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2021-11-01 14:10:00 -0700 |
| commit | 35346ab64132d0f5919b06932d708c0d10360553 (patch) | |
| tree | dfa39e7231a75a2e84dbfc6fad96ad52321042ea /net/ipv4 | |
| parent | 31a645aea4f8da5bb190ce322c6e5aacaef13855 (diff) | |
| download | linux-35346ab64132d0f5919b06932d708c0d10360553.tar.gz | |
bpf: Factor out helpers for ctx access checking
Factor out two helpers to check the read access of ctx for raw tp and BTF function. bpf_tracing_ctx_access() is used to check the read access to argument is valid, and bpf_tracing_btf_ctx_access() checks whether the btf type of argument is valid besides the checking of argument read. bpf_tracing_btf_ctx_access() will be used by the following patch. Signed-off-by: Hou Tao <houtao1@huawei.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20211025064025.2567443-3-houtao1@huawei.com
Diffstat (limited to 'net/ipv4')
| -rw-r--r-- | net/ipv4/bpf_tcp_ca.c | 9 |
1 files changed, 1 insertions, 8 deletions
diff --git a/net/ipv4/bpf_tcp_ca.c b/net/ipv4/bpf_tcp_ca.c index 57709ac09fb2..2cf02b4d77fb 100644 --- a/net/ipv4/bpf_tcp_ca.c +++ b/net/ipv4/bpf_tcp_ca.c @@ -81,14 +81,7 @@ static bool bpf_tcp_ca_is_valid_access(int off, int size, const struct bpf_prog *prog, struct bpf_insn_access_aux *info) { - if (off < 0 || off >= sizeof(__u64) * MAX_BPF_FUNC_ARGS) - return false; - if (type != BPF_READ) - return false; - if (off % size != 0) - return false; - - if (!btf_ctx_access(off, size, type, prog, info)) + if (!bpf_tracing_btf_ctx_access(off, size, type, prog, info)) return false; if (info->reg_type == PTR_TO_BTF_ID && info->btf_id == sock_id) |