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Cleanup OpenSSL reference on bad domain name

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Free/detach tsigkey and sig0key when exiting and then call
dst_lib_destroy if we have previously called dst_lib_init.  This will,
in theory, allow OPENSSL_cleanup to free all memory.
This commit is contained in:
Mark Andrews
2023-01-30 10:47:57 +11:00
parent 997fde6179
commit 4c2525c418
1 changed files with 24 additions and 15 deletions
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39
bin/dig/dighost.c
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@@ -227,6 +227,9 @@ clear_current_lookup(void);
static bool
next_origin(dig_lookup_t *oldlookup);
static void
cleanup_openssl_refs(void);
static int
count_dots(char *string) {
char *s;
@@ -2334,6 +2337,7 @@ setup_lookup(dig_lookup_t *lookup) {
clear_current_lookup();
return (false);
#else /* if TARGET_OS_IPHONE */
cleanup_openssl_refs();
digexit();
#endif /* if TARGET_OS_IPHONE */
}
@@ -4660,6 +4664,25 @@ cancel_all(void) {
}
}
static void
cleanup_openssl_refs(void) {
if (tsigkey != NULL) {
debug("freeing TSIG key %p", tsigkey);
dns_tsigkey_detach(&tsigkey);
}
if (sig0key != NULL) {
debug("freeing SIG(0) key %p", sig0key);
dst_key_free(&sig0key);
}
if (is_dst_up) {
debug("destroy DST lib");
dst_lib_destroy();
is_dst_up = false;
}
}
/*%
* Destroy all of the libs we are using, and get everything ready for a
* clean shutdown.
@@ -4681,27 +4704,13 @@ destroy_libs(void) {
clear_searchlist();
if (tsigkey != NULL) {
debug("freeing TSIG key %p", tsigkey);
dns_tsigkey_detach(&tsigkey);
}
if (sig0key != NULL) {
debug("freeing SIG(0) key %p", sig0key);
dst_key_free(&sig0key);
}
cleanup_openssl_refs();
if (namebuf != NULL) {
debug("freeing key %p", tsigkey);
isc_buffer_free(&namebuf);
}
if (is_dst_up) {
debug("destroy DST lib");
dst_lib_destroy();
is_dst_up = false;
}
debug("Removing log context");
isc_log_destroy(&lctx);