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authorEdward Tomasz Napierala <trasz@FreeBSD.org>2021-01-31 21:41:55 +0000
committerEdward Tomasz Napierala <trasz@FreeBSD.org>2021-01-31 21:42:02 +0000
commit5299d64b2b9f7a25e423ef1785d9402a0ef198d3 (patch)
treed2c0bb3205f6e5782272f16c545551c6e4bcd9ee /lib/libc
parentb8073b3c74342113398f36a1c68f442ae9e092e6 (diff)
downloadsrc-5299d64b2b9f7a25e423ef1785d9402a0ef198d3.tar.gz
src-5299d64b2b9f7a25e423ef1785d9402a0ef198d3.zip
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
Diffstat (limited to 'lib/libc')
-rw-r--r--lib/libc/rpc/getrpcport.c6
1 files changed, 3 insertions, 3 deletions
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,