Fix more stack corruptions on amd64.

Vararg functions have a different calling convention than regular
functions on amd64. Casting a varag function to a regular one to
match the function pointer declaration will hide the varargs from
the caller and we will end up with an incorrectly setup stack.

Entirely remove the varargs from these functions and change the
functions to match the declaration of the function pointers.
Remove the now unnecessary casts.

Also change static struct ipprotosw[] to two independent
protosw/ip6protosw definitions to remove an unnecessary cast.

PR:				amd64/95008
Submitted and tested by:	Mats Palmgren
Reviewed by:			rwatson
MFC after:			3 days

1 files changed, 10 insertions, 18 deletions

diff --git a/sys/netipsec/xform_ipip.c b/sys/netipsec/xform_ipip.c
index b0997c4..4bb0b54 100644
--- a/sys/netipsec/xform_ipip.c
+++ b/sys/netipsec/xform_ipip.c
@@ -61,7 +61,6 @@
 #include <netinet/ip_ecn.h>
 #include <netinet/ip_var.h>
 #include <netinet/ip_encap.h>
-#include <netinet/ipprotosw.h>
 
 #include <netipsec/ipsec.h>
 #include <netipsec/xform.h>
@@ -129,11 +128,8 @@ ip4_input6(struct mbuf **m, int *offp, int proto)
  * Really only a wrapper for ipip_input(), for use with IPv4.
  */
 void
-ip4_input(struct mbuf *m, ...)
+ip4_input(struct mbuf *m, int off)
 {
-	va_list ap;
-	int iphlen;
-
 #if 0
 	/* If we do not accept IP-in-IP explicitly, drop.  */
 	if (!ipip_allow && (m->m_flags & M_IPSEC) == 0) {
@@ -143,11 +139,7 @@ ip4_input(struct mbuf *m, ...)
 		return;
 	}
 #endif
-	va_start(ap, m);
-	iphlen = va_arg(ap, int);
-	va_end(ap);
-
-	_ipip_input(m, iphlen, NULL);
+	_ipip_input(m, off, NULL);
 }
 #endif /* INET */
 
@@ -638,24 +630,24 @@ static struct xformsw ipe4_xformsw = {
 };
 
 extern struct domain inetdomain;
-static struct ipprotosw ipe4_protosw[] = {
+static struct protosw ipe4_protosw =
 { SOCK_RAW,	&inetdomain,	IPPROTO_IPV4,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
-  (pr_in_input_t*) ip4_input,
+  ip4_input,
 		0, 		0,		rip_ctloutput,
   0,
   0,		0,		0,		0,
   &rip_usrreqs
-},
+};
 #ifdef INET6
+static struct ip6protosw ipe6_protosw =
 { SOCK_RAW,	&inetdomain,	IPPROTO_IPV6,	PR_ATOMIC|PR_ADDR|PR_LASTHDR,
-  (pr_in_input_t*) ip4_input,
+  ip4_input6,
 		0,	 	0,		rip_ctloutput,
   0,
   0,		0,		0,		0,
   &rip_usrreqs
-}
-#endif
 };
+#endif
 
 /*
  * Check the encapsulated packet to see if we want it
@@ -679,10 +671,10 @@ ipe4_attach(void)
 	/* attach to encapsulation framework */
 	/* XXX save return cookie for detach on module remove */
 	(void) encap_attach_func(AF_INET, -1,
-		ipe4_encapcheck, (struct protosw*) &ipe4_protosw[0], NULL);
+		ipe4_encapcheck, &ipe4_protosw, NULL);
 #ifdef INET6
 	(void) encap_attach_func(AF_INET6, -1,
-		ipe4_encapcheck, (struct protosw*) &ipe4_protosw[1], NULL);
+		ipe4_encapcheck, (struct protosw *)&ipe6_protosw, NULL);
 #endif
 }
 SYSINIT(ipe4_xform_init, SI_SUB_PROTO_DOMAIN, SI_ORDER_MIDDLE, ipe4_attach, NULL);