89c17cfdd5
- Fix assertion error in res_query.c, triggered by Firefox (bso#13013). OBS-URL: https://build.opensuse.org/request/show/82412 OBS-URL: https://build.opensuse.org/package/show/Base:System/glibc?expand=0&rev=105
60 lines
1.8 KiB
Diff
60 lines
1.8 KiB
Diff
2011-07-21 Aurelien Jarno <aurel32@debian.org>
|
|
|
|
* resolv/res_query.c(__libc_res_nquery): Assign hp and hp2
|
|
depending n and resplen2 to catch cases where answer
|
|
equals answerp2.
|
|
|
|
diff --git a/resolv/res_query.c b/resolv/res_query.c
|
|
index 2f7cfaa..405fa68 100644
|
|
--- a/resolv/res_query.c
|
|
+++ b/resolv/res_query.c
|
|
@@ -122,6 +122,7 @@ __libc_res_nquery(res_state statp,
|
|
int *resplen2)
|
|
{
|
|
HEADER *hp = (HEADER *) answer;
|
|
+ HEADER *hp2;
|
|
int n, use_malloc = 0;
|
|
u_int oflags = statp->_flags;
|
|
|
|
@@ -239,26 +240,25 @@ __libc_res_nquery(res_state statp,
|
|
/* __libc_res_nsend might have reallocated the buffer. */
|
|
hp = (HEADER *) *answerp;
|
|
|
|
- /* We simplify the following tests by assigning HP to HP2. It
|
|
- is easy to verify that this is the same as ignoring all
|
|
- tests of HP2. */
|
|
- HEADER *hp2 = answerp2 ? (HEADER *) *answerp2 : hp;
|
|
-
|
|
- if (n < (int) sizeof (HEADER) && answerp2 != NULL
|
|
- && *resplen2 > (int) sizeof (HEADER))
|
|
+ /* We simplify the following tests by assigning HP to HP2 or
|
|
+ vice versa. It is easy to verify that this is the same as
|
|
+ ignoring all tests of HP or HP2. */
|
|
+ if (answerp2 == NULL || *resplen2 < (int) sizeof (HEADER))
|
|
{
|
|
- /* Special case of partial answer. */
|
|
- assert (hp != hp2);
|
|
- hp = hp2;
|
|
+ hp2 = hp;
|
|
}
|
|
- else if (answerp2 != NULL && *resplen2 < (int) sizeof (HEADER)
|
|
- && n > (int) sizeof (HEADER))
|
|
+ else
|
|
{
|
|
- /* Special case of partial answer. */
|
|
- assert (hp != hp2);
|
|
- hp2 = hp;
|
|
+ hp2 = (HEADER *) *answerp2;
|
|
+ if (n < (int) sizeof (HEADER))
|
|
+ {
|
|
+ hp = hp2;
|
|
+ }
|
|
}
|
|
|
|
+ /* Make sure both hp and hp2 are defined */
|
|
+ assert((hp != NULL) && (hp2 != NULL));
|
|
+
|
|
if ((hp->rcode != NOERROR || ntohs(hp->ancount) == 0)
|
|
&& (hp2->rcode != NOERROR || ntohs(hp2->ancount) == 0)) {
|
|
#ifdef DEBUG
|