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Fix stack corruptions on amd64.

Browse source 
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.

Lots of explanations and help from:     peter
Reviewed by:                            peter
PR:                                     amd64/89261
MFC after:                              6 days
This commit is contained in:
Bjoern A. Zeeb 2006-01-21 10:44:34 +00:00
parent 25227ab8c5
commit 3f2e28fe9f
7 changed files with 13 additions and 59 deletions
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4
sys/net/if_gre.c
View file

@ -123,7 +123,7 @@ static const struct protosw in_gre_protosw = {
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_GRE,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = (pr_input_t *)gre_input,
.pr_input = gre_input,
.pr_output = (pr_output_t *)rip_output,
.pr_ctlinput = rip_ctlinput,
.pr_ctloutput = rip_ctloutput,
@ -134,7 +134,7 @@ static const struct protosw in_mobile_protosw = {
.pr_domain = &inetdomain,
.pr_protocol = IPPROTO_MOBILE,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_input = (pr_input_t *)gre_mobile_input,
.pr_input = gre_mobile_input,
.pr_output = (pr_output_t *)rip_output,
.pr_ctlinput = rip_ctlinput,
.pr_ctloutput = rip_ctloutput,

28
sys/netinet/ip_gre.c
View file

@ -104,20 +104,10 @@ static int gre_input2(struct mbuf *, int, u_char);
* This really is simple
*/
void
#if __STDC__
gre_input(struct mbuf *m, ...)
#else
gre_input(m, va_alist)
struct mbuf *m;
va_dcl
#endif
gre_input(struct mbuf *m, int off)
{
int off, ret, proto;
va_list ap;
int ret, proto;
va_start(ap, m);
off = va_arg(ap, int);
va_end(ap);
proto = (mtod(m, struct ip *))->ip_p;
ret = gre_input2(m, off, proto);
@ -236,25 +226,13 @@ gre_input2(struct mbuf *m ,int hlen, u_char proto)
*/
void
#if __STDC__
gre_mobile_input(struct mbuf *m, ...)
#else
gre_mobile_input(m, va_alist)
struct mbuf *m;
va_dcl
#endif
gre_mobile_input(struct mbuf *m, int hlen)
{
struct ip *ip;
struct mobip_h *mip;
struct gre_softc *sc;
int hlen;
va_list ap;
int msiz;
va_start(ap, m);
hlen = va_arg(ap, int);
va_end(ap);
if ((sc = gre_lookup(m, IPPROTO_MOBILE)) == NULL) {
/* No matching tunnel or tunnel is down. */
m_freem(m);

4
sys/netinet/ip_gre.h
View file

@ -38,6 +38,6 @@
*/
#ifdef _KERNEL
void gre_input(struct mbuf *, ...);
void gre_mobile_input(struct mbuf *, ...);
void gre_input(struct mbuf *, int);
void gre_mobile_input(struct mbuf *, int);
#endif /* _KERNEL */

16
sys/netipsec/keysock.c
View file

@ -77,23 +77,11 @@ struct pfkeystat pfkeystat;
* key_output()
*/
int
#if __STDC__
key_output(struct mbuf *m, ...)
#else
key_output(m, va_alist)
struct mbuf *m;
va_dcl
#endif
key_output(struct mbuf *m, struct socket *so)
{
struct sadb_msg *msg;
int len, error = 0;
int s;
struct socket *so;
va_list ap;
va_start(ap, m);
so = va_arg(ap, struct socket *);
va_end(ap);
if (m == 0)
panic("%s: NULL pointer was passed.\n", __func__);
@ -590,7 +578,7 @@ struct protosw keysw[] = {
.pr_domain = &keydomain,
.pr_protocol = PF_KEY_V2,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_output = (pr_output_t *)key_output,
.pr_output = key_output,
.pr_ctlinput = raw_ctlinput,
.pr_init = raw_init,
.pr_usrreqs = &key_usrreqs

2
sys/netipsec/keysock.h
View file

@ -71,7 +71,7 @@ struct keycb {
extern struct pfkeystat pfkeystat;
extern int key_output __P((struct mbuf *, ...));
extern int key_output(struct mbuf *m, struct socket *so);
extern int key_usrreq __P((struct socket *,
int, struct mbuf *, struct mbuf *, struct mbuf *));

16
sys/netkey/keysock.c
View file

@ -75,23 +75,11 @@ struct pfkeystat pfkeystat;
* key_output()
*/
int
#if __STDC__
key_output(struct mbuf *m, ...)
#else
key_output(m, va_alist)
struct mbuf *m;
va_dcl
#endif
key_output(struct mbuf *m, struct socket *so)
{
struct sadb_msg *msg;
int len, error = 0;
int s;
struct socket *so;
va_list ap;
va_start(ap, m);
so = va_arg(ap, struct socket *);
va_end(ap);
if (m == 0)
panic("key_output: NULL pointer was passed.");
@ -500,7 +488,7 @@ struct protosw keysw[] = {
.pr_domain = &keydomain,
.pr_protocol = PF_KEY_V2,
.pr_flags = PR_ATOMIC|PR_ADDR,
.pr_output = (pr_output_t *)key_output,
.pr_output = key_output,
.pr_ctlinput = raw_ctlinput,
.pr_init = raw_init,
.pr_usrreqs = &key_usrreqs

2
sys/netkey/keysock.h
View file

@ -71,7 +71,7 @@ struct keycb {
extern struct pfkeystat pfkeystat;
extern int key_output(struct mbuf *, ...);
extern int key_output(struct mbuf *m, struct socket *so);
extern int key_usrreq(struct socket *,
int, struct mbuf *, struct mbuf *, struct mbuf *);