fix 2 segfaults in ZTS mode

diff --git a/ext/posix/posix.c b/ext/posix/posix.c
index dc8545809883d568c28a2390c1d709e1ab9c6fb9..355909539199d15cba6da9cbf5e9ec61dd4efec7 100644 (file)
--- a/ext/posix/posix.c
+++ b/ext/posix/posix.c
@@ -873,7 +873,7 @@ PHP_FUNCTION(posix_getgrgid)
 #if defined(ZTS) && defined(HAVE_GETGRGID_R) && defined(_SC_GETGR_R_SIZE_MAX)
        int ret;
        struct group _g;
-       struct group *retgrptr;
+       struct group *retgrptr = NULL;
        long grbuflen;
        char *grbuf;
 #endif
@@ -892,7 +892,7 @@ PHP_FUNCTION(posix_getgrgid)
        grbuf = emalloc(grbuflen);
 
        ret = getgrgid_r(gid, &_g, grbuf, grbuflen, &retgrptr);
-       if (ret) {
+       if (ret || retgrptr == NULL) {
                POSIX_G(last_error) = ret;
                efree(grbuf);
                RETURN_FALSE;
@@ -1009,7 +1009,7 @@ PHP_FUNCTION(posix_getpwuid)
        pwbuf = emalloc(pwbuflen);
 
        ret = getpwuid_r(uid, &_pw, pwbuf, pwbuflen, &retpwptr);
-       if (ret) {
+       if (ret || retpwptr == NULL) {
                POSIX_G(last_error) = ret;
                efree(pwbuf);
                RETURN_FALSE;