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selftests/bpf: Use memcpy() for bounded non-NULL-terminated copies

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Replace strncpy() with memcpy() in cases where the source is
non-NULL-terminated and the copy length is known.

Signed-off-by: Ihor Solodrai <ihor.solodrai@linux.dev>
Link: https://lore.kernel.org/r/20260223190736.649171-6-ihor.solodrai@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Ihor Solodrai
2026-02-23 11:07:21 -08:00
committed by Alexei Starovoitov
parent 3ed0bc2d49
commit 9d8685239e
2 changed files with 5 additions and 3 deletions
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6
tools/testing/selftests/bpf/prog_tests/ctx_rewrite.c
View File

@@ -308,8 +308,10 @@ static int find_field_offset(struct btf *btf, char *pattern, regmatch_t *matches
return -1;
}
strncpy(type_str, type, type_sz);
strncpy(field_str, field, field_sz);
memcpy(type_str, type, type_sz);
type_str[type_sz] = '\0';
memcpy(field_str, field, field_sz);
field_str[field_sz] = '\0';
btf_id = btf__find_by_name(btf, type_str);
if (btf_id < 0) {
PRINT_FAIL("No BTF info for type %s\n", type_str);

2
tools/testing/selftests/bpf/test_verifier.c
View File

@@ -1320,7 +1320,7 @@ static bool cmp_str_seq(const char *log, const char *exp)
printf("FAIL\nTestcase bug\n");
return false;
}
strncpy(needle, exp, len);
memcpy(needle, exp, len);
needle[len] = 0;
q = strstr(log, needle);
if (!q) {