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| author | Martin KaFai Lau <kafai@fb.com> | 2018-05-23 20:32:36 +0200 |
|---|---|---|
| committer | Daniel Borkmann <daniel@iogearbox.net> | 2018-05-24 09:15:11 +0200 |
| commit | a2889a4c2d3aefdf6f2a636fa1531243653a7633 (patch) | |
| tree | 438d5921310c11392d0e4995d1f3e7b90fc0203a /kernel | |
| parent | tools/lib/libbpf.c: fix string format to allow build on arm32 (diff) | |
| download | linux-a2889a4c2d3aefdf6f2a636fa1531243653a7633.tar.xz linux-a2889a4c2d3aefdf6f2a636fa1531243653a7633.zip | |
bpf: btf: Avoid variable length array
Sparse warning:
kernel/bpf/btf.c:1985:34: warning: Variable length array is used.
This patch directly uses ARRAY_SIZE().
Fixes: f80442a4cd18 ("bpf: btf: Change how section is supported in btf_header")
Signed-off-by: Martin KaFai Lau <kafai@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/bpf/btf.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/kernel/bpf/btf.c b/kernel/bpf/btf.c index 9cbeabb5aca3..7e90fd13b5b5 100644 --- a/kernel/bpf/btf.c +++ b/kernel/bpf/btf.c @@ -1981,8 +1981,7 @@ static int btf_sec_info_cmp(const void *a, const void *b) static int btf_check_sec_info(struct btf_verifier_env *env, u32 btf_data_size) { - const unsigned int nr_secs = ARRAY_SIZE(btf_sec_info_offset); - struct btf_sec_info secs[nr_secs]; + struct btf_sec_info secs[ARRAY_SIZE(btf_sec_info_offset)]; u32 total, expected_total, i; const struct btf_header *hdr; const struct btf *btf; @@ -1991,17 +1990,17 @@ static int btf_check_sec_info(struct btf_verifier_env *env, hdr = &btf->hdr; /* Populate the secs from hdr */ - for (i = 0; i < nr_secs; i++) + for (i = 0; i < ARRAY_SIZE(btf_sec_info_offset); i++) secs[i] = *(struct btf_sec_info *)((void *)hdr + btf_sec_info_offset[i]); - sort(secs, nr_secs, sizeof(struct btf_sec_info), - btf_sec_info_cmp, NULL); + sort(secs, ARRAY_SIZE(btf_sec_info_offset), + sizeof(struct btf_sec_info), btf_sec_info_cmp, NULL); /* Check for gaps and overlap among sections */ total = 0; expected_total = btf_data_size - hdr->hdr_len; - for (i = 0; i < nr_secs; i++) { + for (i = 0; i < ARRAY_SIZE(btf_sec_info_offset); i++) { if (expected_total < secs[i].off) { btf_verifier_log(env, "Invalid section offset"); return -EINVAL; |