fix double-processing of DT_RELR relocations in ldso relocating itself

[musl] / src / stdio / open_wmemstream.c

diff --git a/src/stdio/open_wmemstream.c b/src/stdio/open_wmemstream.c
index a7c3a64..b8ae4a7 100644 (file)
--- a/src/stdio/open_wmemstream.c
+++ b/src/stdio/open_wmemstream.c
@@ -3,6 +3,8 @@
 #include <errno.h>
 #include <limits.h>
 #include <string.h>
+#include <stdlib.h>
+#include "libc.h"
 
 struct cookie {
        wchar_t **bufp;
@@ -38,8 +40,12 @@ fail:
 static size_t wms_write(FILE *f, const unsigned char *buf, size_t len)
 {
        struct cookie *c = f->cookie;
-       size_t len2;
+       size_t len2 = f->wpos - f->wbase;
        wchar_t *newbuf;
+       if (len2) {
+               f->wpos = f->wbase;
+               if (wms_write(f, f->wbase, len2) < len2) return 0;
+       }
        if (len + c->pos >= c->space) {
                len2 = 2*c->space+1 | c->pos+len+1;
                if (len2 > SSIZE_MAX/4) return 0;