getservbyport_r: fix out-of-bounds buffer read

[musl] / src / stdio / stdin.c

diff --git a/src/stdio/stdin.c b/src/stdio/stdin.c
index 476dc70..5aa5262 100644 (file)
--- a/src/stdio/stdin.c
+++ b/src/stdio/stdin.c
@@ -1,7 +1,9 @@
 #include "stdio_impl.h"
 
+#undef stdin
+
 static unsigned char buf[BUFSIZ+UNGET];
-static FILE f = {
+hidden FILE __stdin_FILE = {
        .buf = buf+UNGET,
        .buf_size = sizeof buf-UNGET,
        .fd = 0,
@@ -11,5 +13,5 @@ static FILE f = {
        .close = __stdio_close,
        .lock = -1,
 };
-FILE *const stdin = &f;
-FILE *const __stdin_used = &f;
+FILE *const stdin = &__stdin_FILE;
+FILE *volatile __stdin_used = &__stdin_FILE;