prevent CNAME/PTR parsing from reading data past the response end

[musl] / src / stdio / stdout.c

diff --git a/src/stdio/stdout.c b/src/stdio/stdout.c
index 552d729..4985a41 100644 (file)
--- a/src/stdio/stdout.c
+++ b/src/stdio/stdout.c
@@ -1,7 +1,9 @@
 #include "stdio_impl.h"
 
+#undef stdout
+
 static unsigned char buf[BUFSIZ+UNGET];
-static FILE f = {
+hidden FILE __stdout_FILE = {
        .buf = buf+UNGET,
        .buf_size = sizeof buf-UNGET,
        .fd = 1,
@@ -10,8 +12,7 @@ static FILE f = {
        .write = __stdout_write,
        .seek = __stdio_seek,
        .close = __stdio_close,
+       .lock = -1,
 };
-FILE *const stdout = &f;
-
-/* overrides symbol in fflush.c, used for flushing NULL */
-FILE *const __stdout_to_flush = &f;
+FILE *const stdout = &__stdout_FILE;
+FILE *volatile __stdout_used = &__stdout_FILE;