story about lost %ebx (stack corruption in inet_aton ?)

[Yuriy Tsibizov]

> My first impression was that there is a bug in gcc compiler on 7-BETA
> and 8-CURRENT (i386 only, and only if optimization is enabled), but it
> seems to be incorrect. Most probably source is stack corruption in
> inet_aton()

mistyped, it is inet_network() that fails...

testcase:

#include <sys/cdefs.h>
#include <sys/types.h>
#include <netinet/in.h>
#include <arpa/inet.h>
#include <ctype.h>

int main(){
int val;
char s[]="10.10.0.10.0/12"; // four dots here!
char *q;

        q = strchr(s,'/');
        if (q) {
                *q = '\0';
                if ((val = inet_network(s)) != INADDR_NONE) {
                        printf("OK\n");
                        return (0);
                }
                printf("q= %08x\n", q);
                *q = '/';
        }
}


(should be built with -O1 or -O2 to expose that bug)

Yuriy.