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netstat truncates info in sockaddr* between kgetsa and p_sockaddr

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by dereferencing pointer to smaller structure

PR:		5256
Reviewed by:	phk
Submitted by:	Gregory D. Moncreaff <moncrg@bt340707.res.ray.com>
This commit is contained in:
Poul-Henning Kamp 1998-04-22 06:54:31 +00:00
parent 94a60328c1
commit 384606eb2c
1 changed files with 14 additions and 12 deletions
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26
usr.bin/netstat/route.c
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@ -36,7 +36,7 @@
static char sccsid[] = "From: @(#)route.c 8.6 (Berkeley) 4/28/95";
#endif
static const char rcsid[] =
"$Id: route.c,v 1.28 1997/07/29 06:51:41 charnier Exp $";
"$Id: route.c,v 1.29 1998/04/19 18:18:25 phk Exp $";
#endif /* not lint */
#include <sys/param.h>
@ -99,10 +99,12 @@ struct bits {
{ 0 }
};
static union {
typedef union {
struct sockaddr u_sa;
u_short u_data[128];
} pt_u;
} sa_u;
static sa_u pt_u;
int do_rtent = 0;
struct rtentry rtentry;
@ -510,7 +512,7 @@ p_rtentry(rt)
static char name[16];
static char prettyname[9];
struct sockaddr *sa;
struct sockaddr addr, mask;
sa_u addr, mask;
/*
* Don't print protocol-cloned routes unless -a.
@ -518,14 +520,14 @@ p_rtentry(rt)
if (rt->rt_parent && !aflag)
return;
if (!(sa = kgetsa(rt_key(rt))))
bzero(&addr, sizeof addr);
else
addr = *sa;
if (!rt_mask(rt) || !(sa = kgetsa(rt_mask(rt))))
bzero(&mask, sizeof mask);
else
mask = *sa;
bzero(&addr, sizeof addr);
if ((sa = kgetsa(rt_key(rt))))
bcopy(sa,&addr,sa->sa_len);
bzero(&mask, sizeof mask);
if (rt_mask(rt) && (sa = kgetsa(rt_mask(rt))))
bcopy(sa,&mask,sa->sa_len);
p_sockaddr(&addr, &mask, rt->rt_flags, WID_DST);
p_sockaddr(kgetsa(rt->rt_gateway), NULL, RTF_HOST, WID_GW);
p_flags(rt->rt_flags, "%-6.6s ");