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authorRich Felker <dalias@aerifal.cx>2019-02-20 17:58:21 -0500
committerRich Felker <dalias@aerifal.cx>2019-02-20 17:58:21 -0500
commitad795d56ba3fb9d69f524ee676e3b1e2355cceb7 (patch)
tree4a4e17ac64b24c94c4329f6b042027b166e21d38 /src/network
parent224d938c5e538ac37f84c6e9a01bd2095aa7081a (diff)
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fix spurious undefined behavior in getaddrinfo
addressing &out[k].sa was arguably undefined, despite &out[k] being defined the slot one past the end of an array, since the member access .sa is intervening between the [] operator and the & operator.
Diffstat (limited to 'src/network')
-rw-r--r--src/network/getaddrinfo.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/src/network/getaddrinfo.c b/src/network/getaddrinfo.c
index 209970ad..efaab306 100644
--- a/src/network/getaddrinfo.c
+++ b/src/network/getaddrinfo.c
@@ -113,8 +113,8 @@ int getaddrinfo(const char *restrict host, const char *restrict serv, const stru
? sizeof(struct sockaddr_in)
: sizeof(struct sockaddr_in6),
.ai_addr = (void *)&out[k].sa,
- .ai_canonname = outcanon,
- .ai_next = &out[k+1].ai };
+ .ai_canonname = outcanon };
+ if (k) out[k-1].ai.ai_next = &out[k].ai;
switch (addrs[i].family) {
case AF_INET:
out[k].sa.sin.sin_family = AF_INET;
@@ -130,7 +130,6 @@ int getaddrinfo(const char *restrict host, const char *restrict serv, const stru
}
}
out[0].ref = nais;
- out[nais-1].ai.ai_next = 0;
*res = &out->ai;
return 0;
}