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| author | Yuntao Wang <ytcoode@gmail.com> | 2022-03-25 00:42:38 +0800 |
|---|---|---|
| committer | Alexei Starovoitov <ast@kernel.org> | 2022-03-28 19:08:17 -0700 |
| commit | c29a4920dfcaa1433b09e2674f605f72767a385c (patch) | |
| tree | c00840a8ab95456930d9c5a02e6211d9a48ca4a7 /kernel | |
| parent | 98870605b3742c38353b50b6dbad33fab9de415f (diff) | |
| download | lwn-c29a4920dfcaa1433b09e2674f605f72767a385c.tar.gz lwn-c29a4920dfcaa1433b09e2674f605f72767a385c.zip | |
bpf: Fix maximum permitted number of arguments check
Since the m->arg_size array can hold up to MAX_BPF_FUNC_ARGS argument
sizes, it's ok that nargs is equal to MAX_BPF_FUNC_ARGS.
Signed-off-by: Yuntao Wang <ytcoode@gmail.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20220324164238.1274915-1-ytcoode@gmail.com
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/btf.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index 24788ce564a0..0918a39279f6 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -5507,7 +5507,7 @@ int btf_distill_func_proto(struct bpf_verifier_log *log, } args = (const struct btf_param *)(func + 1); nargs = btf_type_vlen(func); - if (nargs >= MAX_BPF_FUNC_ARGS) { + if (nargs > MAX_BPF_FUNC_ARGS) { bpf_log(log, "The function %s has %d arguments. Too many.\n", tname, nargs); |