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Diffstat (limited to 'inet/getnameinfo.c')
-rw-r--r--inet/getnameinfo.c14
1 files changed, 13 insertions, 1 deletions
diff --git a/inet/getnameinfo.c b/inet/getnameinfo.c
index 709f9ecbfe..9a0709229e 100644
--- a/inet/getnameinfo.c
+++ b/inet/getnameinfo.c
@@ -172,8 +172,20 @@ getnameinfo (const struct sockaddr *sa, socklen_t addrlen, char *host,
int herrno;
char *tmpbuf = alloca (tmpbuflen);
struct hostent th;
+ socklen_t min_addrlen = 0;
- if (sa == NULL)
+ if (sa == NULL || addrlen < sizeof (sa_family_t))
+ return -1;
+
+ switch (sa->sa_family)
+ {
+ case AF_LOCAL:
+ min_addrlen = (socklen_t) (((struct sockaddr_un *) NULL)->sun_path);
+ break;
+ default:
+ min_addrlen = __libc_sa_len (sa->sa_family);
+ }
+ if (addrlen < min_addrlen)
return -1;
if (host != NULL && hostlen > 0)