From 5299d64b2b9f7a25e423ef1785d9402a0ef198d3 Mon Sep 17 00:00:00 2001 From: Edward Tomasz Napierala Date: Sun, 31 Jan 2021 21:41:55 +0000 Subject: libc: fix buffer overrun in getrpcport(3) Reviewed By: markj Sponsored by: NetApp, Inc. Sponsored by: Klara, Inc. Differential Revision: https://reviews.freebsd.org/D27332 --- lib/libc/rpc/getrpcport.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'lib/libc') diff --git a/lib/libc/rpc/getrpcport.c b/lib/libc/rpc/getrpcport.c index 2b2d459c8887..4abc9a0c16af 100644 --- a/lib/libc/rpc/getrpcport.c +++ b/lib/libc/rpc/getrpcport.c @@ -62,14 +62,14 @@ getrpcport(char *host, int prognum, int versnum, int proto) assert(host != NULL); - if ((hp = gethostbyname(host)) == NULL) + if ((hp = gethostbyname2(host, AF_INET)) == NULL) return (0); memset(&addr, 0, sizeof(addr)); addr.sin_len = sizeof(struct sockaddr_in); addr.sin_family = AF_INET; addr.sin_port = 0; - if (hp->h_length > addr.sin_len) - hp->h_length = addr.sin_len; + if (hp->h_length > sizeof(addr.sin_addr.s_addr)) + hp->h_length = sizeof(addr.sin_addr.s_addr); memcpy(&addr.sin_addr.s_addr, hp->h_addr, (size_t)hp->h_length); /* Inconsistent interfaces need casts! :-( */ return (pmap_getport(&addr, (u_long)prognum, (u_long)versnum, -- cgit v1.2.3