diff options
| author | archie <archie@FreeBSD.org> | 1998-12-04 22:54:57 +0000 |
|---|---|---|
| committer | archie <archie@FreeBSD.org> | 1998-12-04 22:54:57 +0000 |
| commit | 982e80577dd08945aa2345ebe35e3f50eef9eb48 (patch) | |
| tree | e21ff4cbfbcb4097c6cc444d68ddd9a3fd37837f /sys/nfsclient/bootp_subr.c | |
| parent | 707b8f68aa118c7396f2a2633751e32477d9ed08 (diff) | |
| download | FreeBSD-src-982e80577dd08945aa2345ebe35e3f50eef9eb48.zip FreeBSD-src-982e80577dd08945aa2345ebe35e3f50eef9eb48.tar.gz | |
Examine all occurrences of sprintf(), strcat(), and str[n]cpy()
for possible buffer overflow problems. Replaced most sprintf()'s
with snprintf(); for others cases, added terminating NUL bytes where
appropriate, replaced constants like "16" with sizeof(), etc.
These changes include several bug fixes, but most changes are for
maintainability's sake. Any instance where it wasn't "immediately
obvious" that a buffer overflow could not occur was made safer.
Reviewed by: Bruce Evans <bde@zeta.org.au>
Reviewed by: Matthew Dillon <dillon@apollo.backplane.com>
Reviewed by: Mike Spengler <mks@networkcs.com>
Diffstat (limited to 'sys/nfsclient/bootp_subr.c')
| -rw-r--r-- | sys/nfsclient/bootp_subr.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/sys/nfsclient/bootp_subr.c b/sys/nfsclient/bootp_subr.c index b6947ca..ca64638 100644 --- a/sys/nfsclient/bootp_subr.c +++ b/sys/nfsclient/bootp_subr.c @@ -1,4 +1,4 @@ -/* $Id: bootp_subr.c,v 1.15 1998/08/23 03:07:16 wollman Exp $ */ +/* $Id: bootp_subr.c,v 1.16 1998/12/03 20:28:23 dillon Exp $ */ /* * Copyright (c) 1995 Gordon Ross, Adam Glass @@ -774,7 +774,8 @@ bootpc_init(void) bzero(&ireq, sizeof(ireq)); for (ifp = TAILQ_FIRST(&ifnet); ifp != 0; ifp = TAILQ_NEXT(ifp,if_link)) { - sprintf(ireq.ifr_name, "%s%d", ifp->if_name, ifp->if_unit); + snprintf(ireq.ifr_name, sizeof(ireq.ifr_name), + "%s%d", ifp->if_name, ifp->if_unit); #ifdef BOOTP_WIRED_TO if (strcmp(ireq.ifr_name, __XSTRING(BOOTP_WIRED_TO)) == 0) break; @@ -885,7 +886,7 @@ bootpc_init(void) myaddr.sin_addr = reply.yiaddr; ip = ntohl(myaddr.sin_addr.s_addr); - sprintf(lookup_path,"swap.%d.%d.%d.%d", + snprintf(lookup_path, sizeof(lookup_path), "swap.%d.%d.%d.%d", ip >> 24, (ip >> 16) & 255 ,(ip >> 8) & 255 ,ip & 255 ); printip("My ip address",myaddr.sin_addr); |
