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Expand stub getaddrinfo() to resolve "localhost".

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This commit is contained in:
Todd C. Miller 2021-02-28 19:52:02 -07:00
parent cfcbc42ec7
commit 0c944576e9
1 changed files with 41 additions and 1 deletions
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42
plugins/sudoers/regress/fuzz/fuzz_policy.c
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@ -157,8 +157,48 @@ sudo_getaddrinfo(
const char *nodename, const char *servname,
const struct addrinfo *hints, struct addrinfo **res)
{
struct addrinfo *ai;
struct in_addr addr;
/* Stub getaddrinfo(3) to avoid a DNS timeout in CIfuzz. */
return EAI_FAIL;
if (strcmp(nodename, "localhost") != 0 || servname != NULL)
return EAI_FAIL;
/* Hard-code localhost. */
ai = calloc(1, sizeof(*ai) + sizeof(struct sockaddr_in));
if (ai == NULL)
return EAI_MEMORY;
ai->ai_canonname = strdup("localhost");
if (ai == NULL) {
free(ai);
return EAI_MEMORY;
}
ai->ai_family = AF_INET;
ai->ai_protocol = IPPROTO_TCP;
ai->ai_addrlen = sizeof(struct sockaddr_in);
ai->ai_addr = (struct sockaddr *)(ai + 1);
inet_pton(AF_INET, "127.0.0.1", &addr);
((struct sockaddr_in *)ai->ai_addr)->sin_family = AF_INET;
((struct sockaddr_in *)ai->ai_addr)->sin_addr = addr;
*res = ai;
return 0;
}
void
#ifdef HAVE_GETADDRINFO
freeaddrinfo(struct addrinfo *ai)
#else
sudo_freeaddrinfo(struct addrinfo *ai)
#endif
{
struct addrinfo *next;
while (ai != NULL) {
next = ai->ai_next;
free(ai->ai_canonname);
free(ai);
ai = next;
}
}
enum fuzz_policy_pass {