forked from rpms/glibc
87 lines
2.8 KiB
Diff
87 lines
2.8 KiB
Diff
|
commit f7efb43738f255db32cfa4e84a491c09f6da66e2
|
||
|
|
Author: Siddhesh Poyarekar <siddhesh@sourceware.org>
|
||
|
|
Date: Thu Mar 3 23:07:42 2022 +0530
|
||
|
|
|
||
|
|
getaddrinfo: Fix leak with AI_ALL [BZ #28852]
|
||
|
|
|
||
|
|
Use realloc in convert_hostent_to_gaih_addrtuple and fix up pointers in
|
||
|
|
the result list so that a single block is maintained for
|
||
|
|
hostbyname3_r/hostbyname2_r and freed in gaih_inet. This result is
|
||
|
|
never merged with any other results, since the hosts database does not
|
||
|
|
permit merging.
|
||
|
|
|
||
|
|
Resolves BZ #28852.
|
||
|
|
|
||
|
|
Signed-off-by: Siddhesh Poyarekar <siddhesh@sourceware.org>
|
||
|
|
Reviewed-by: DJ Delorie <dj@redhat.com>
|
||
|
|
(cherry picked from commit 300460460706ce3ffe29a7df8966e68323ec5bf1)
|
||
|
|
|
||
|
|
diff --git a/sysdeps/posix/getaddrinfo.c b/sysdeps/posix/getaddrinfo.c
|
||
|
|
index 5c0d873e1d766099..ed70e6cb3944d219 100644
|
||
|
|
--- a/sysdeps/posix/getaddrinfo.c
|
||
|
|
+++ b/sysdeps/posix/getaddrinfo.c
|
||
|
|
@@ -189,19 +189,16 @@ gaih_inet_serv (const char *servicename, const struct gaih_typeproto *tp,
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
-/* Convert struct hostent to a list of struct gaih_addrtuple objects.
|
||
|
|
- h_name is not copied, and the struct hostent object must not be
|
||
|
|
- deallocated prematurely. *RESULT must be NULL or a pointer to a
|
||
|
|
- linked-list. The new addresses are appended at the end. */
|
||
|
|
+/* Convert struct hostent to a list of struct gaih_addrtuple objects. h_name
|
||
|
|
+ is not copied, and the struct hostent object must not be deallocated
|
||
|
|
+ prematurely. The new addresses are appended to the tuple array in
|
||
|
|
+ RESULT. */
|
||
|
|
static bool
|
||
|
|
convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
|
||
|
|
int family,
|
||
|
|
struct hostent *h,
|
||
|
|
struct gaih_addrtuple **result)
|
||
|
|
{
|
||
|
|
- while (*result)
|
||
|
|
- result = &(*result)->next;
|
||
|
|
-
|
||
|
|
/* Count the number of addresses in h->h_addr_list. */
|
||
|
|
size_t count = 0;
|
||
|
|
for (char **p = h->h_addr_list; *p != NULL; ++p)
|
||
|
|
@@ -212,10 +209,30 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
|
||
|
|
if (count == 0 || h->h_length > sizeof (((struct gaih_addrtuple) {}).addr))
|
||
|
|
return true;
|
||
|
|
|
||
|
|
- struct gaih_addrtuple *array = calloc (count, sizeof (*array));
|
||
|
|
+ struct gaih_addrtuple *array = *result;
|
||
|
|
+ size_t old = 0;
|
||
|
|
+
|
||
|
|
+ while (array != NULL)
|
||
|
|
+ {
|
||
|
|
+ old++;
|
||
|
|
+ array = array->next;
|
||
|
|
+ }
|
||
|
|
+
|
||
|
|
+ array = realloc (*result, (old + count) * sizeof (*array));
|
||
|
|
+
|
||
|
|
if (array == NULL)
|
||
|
|
return false;
|
||
|
|
|
||
|
|
+ *result = array;
|
||
|
|
+
|
||
|
|
+ /* Update the next pointers on reallocation. */
|
||
|
|
+ for (size_t i = 0; i < old; i++)
|
||
|
|
+ array[i].next = array + i + 1;
|
||
|
|
+
|
||
|
|
+ array += old;
|
||
|
|
+
|
||
|
|
+ memset (array, 0, count * sizeof (*array));
|
||
|
|
+
|
||
|
|
for (size_t i = 0; i < count; ++i)
|
||
|
|
{
|
||
|
|
if (family == AF_INET && req->ai_family == AF_INET6)
|
||
|
|
@@ -235,7 +252,6 @@ convert_hostent_to_gaih_addrtuple (const struct addrinfo *req,
|
||
|
|
array[0].name = h->h_name;
|
||
|
|
array[count - 1].next = NULL;
|
||
|
|
|
||
|
|
- *result = array;
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|