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kconfig: fix segv fault in menuconfig

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With specific configurations requesting help for certain
menu lines caused menuconfig to crash.
This was tracked down to a null pointer bug.
Thanks to "Miles Lane" <miles.lane@gmail.com> for inital reporting
and to Gabriel C <nix.or.die@googlemail.com> for the backtrace
that helped me locating the bug.

Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
This commit is contained in:
Sam Ravnborg 2007-09-19 21:23:09 +02:00 committed by Sam Ravnborg
parent 48874077dd
commit a67cb1319f
2 changed files with 11 additions and 7 deletions
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5
scripts/kconfig/mconf.c
View file

@ -357,8 +357,9 @@ static void get_symbol_str(struct gstr *r, struct symbol *sym)
bool hit;
struct property *prop;
str_printf(r, "Symbol: %s [=%s]\n", sym->name,
sym_get_string_value(sym));
if (sym && sym->name)
str_printf(r, "Symbol: %s [=%s]\n", sym->name,
sym_get_string_value(sym));
for_all_prompts(sym, prop)
get_prompt_str(r, prop);
hit = false;

13
scripts/kconfig/util.c
View file

@ -84,12 +84,15 @@ void str_free(struct gstr *gs)
/* Append to growable string */
void str_append(struct gstr *gs, const char *s)
{
size_t l = strlen(gs->s) + strlen(s) + 1;
if (l > gs->len) {
gs->s = realloc(gs->s, l);
gs->len = l;
size_t l;
if (s) {
l = strlen(gs->s) + strlen(s) + 1;
if (l > gs->len) {
gs->s = realloc(gs->s, l);
gs->len = l;
}
strcat(gs->s, s);
}
strcat(gs->s, s);
}
/* Append printf formatted string to growable string */