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Marshall NULL strings without crashing

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This commit is contained in:
Kristian Høgsberg 2010-08-27 22:16:50 -04:00
parent 4eb536091a
commit 3bbbd15c65
1 changed files with 12 additions and 8 deletions
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6
connection.c
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@ -338,7 +338,7 @@ wl_connection_vmarshal(struct wl_connection *connection,
break; break;
case 's': case 's':
s = va_arg(ap, const char *); s = va_arg(ap, const char *);
length = strlen(s); length = s ? strlen(s) : 0;
*p++ = length; *p++ = length;
memcpy(p, s, length); memcpy(p, s, length);
p += DIV_ROUNDUP(length, sizeof(*p)); p += DIV_ROUNDUP(length, sizeof(*p));
@ -456,6 +456,9 @@ wl_connection_demarshal(struct wl_connection *connection,
goto out; goto out;
} }
if (length == 0) {
values[i].string = NULL;
} else {
values[i].string = malloc(length + 1); values[i].string = malloc(length + 1);
if (values[i].string == NULL) { if (values[i].string == NULL) {
errno = ENOMEM; errno = ENOMEM;
@ -464,6 +467,7 @@ wl_connection_demarshal(struct wl_connection *connection,
} }
memcpy(values[i].string, p, length); memcpy(values[i].string, p, length);
values[i].string[length] = '\0'; values[i].string[length] = '\0';
}
p = next; p = next;
break; break;
case 'o': case 'o':