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authorBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2013-02-23 09:46:21 +0100
committerBernhard Reutner-Fischer <rep.dot.nop@gmail.com>2013-03-14 22:49:25 +0100
commit950fcf0f68732a9aafacb5dfd33e7a7612141722 (patch)
tree57ce773b0f01bf3dfa53b9a77575dc186855e062 /libc/inet/resolv.c
parentf4abc54226d690fd6fdc5f077e63c396831c61b2 (diff)
inet: res_nclose: free user-buffer, not global _res
In res_iclose we were operating on the global _res even if called via res_nclose where we are supposed to operate on the user provided res_state. Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
Diffstat (limited to 'libc/inet/resolv.c')
-rw-r--r--libc/inet/resolv.c21
1 files changed, 12 insertions, 9 deletions
diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c
index 0a1c0be66..769b65ffa 100644
--- a/libc/inet/resolv.c
+++ b/libc/inet/resolv.c
@@ -3531,24 +3531,27 @@ __res_vinit(res_state rp, int preinit)
}
static void
-__res_iclose(void)
+__res_iclose(res_state statp)
{
+ struct __res_state * rp = statp;
__UCLIBC_MUTEX_LOCK(__resolv_lock);
+ if (rp == NULL)
+ rp = __resp;
__close_nameservers();
__res_sync = NULL;
#ifdef __UCLIBC_HAS_IPV6__
{
- char *p1 = (char*) &(_res.nsaddr_list[0]);
- int m = 0;
+ char *p1 = (char*) &(rp->nsaddr_list[0]);
+ unsigned int m = 0;
/* free nsaddrs[m] if they do not point to nsaddr_list[x] */
- while (m < ARRAY_SIZE(_res._u._ext.nsaddrs)) {
- char *p2 = (char*)(_res._u._ext.nsaddrs[m++]);
- if (p2 < p1 || (p2 - p1) > sizeof(_res.nsaddr_list))
+ while (m < ARRAY_SIZE(rp->_u._ext.nsaddrs)) {
+ char *p2 = (char*)(rp->_u._ext.nsaddrs[m++]);
+ if (p2 < p1 || (p2 - p1) > (signed)sizeof(rp->nsaddr_list))
free(p2);
}
}
#endif
- memset(&_res, 0, sizeof(_res));
+ memset(rp, 0, sizeof(struct __res_state));
__UCLIBC_MUTEX_UNLOCK(__resolv_lock);
}
@@ -3563,13 +3566,13 @@ __res_iclose(void)
void
res_nclose(res_state statp)
{
- __res_iclose();
+ __res_iclose(statp);
}
#ifdef __UCLIBC_HAS_BSD_RES_CLOSE__
void res_close(void)
{
- __res_iclose();
+ __res_iclose(NULL);
}
#endif