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

[musl] / src / stdio / stderr.c

diff --git a/src/stdio/stderr.c b/src/stdio/stderr.c
index 3fd8f81..f2bc464 100644 (file)
--- a/src/stdio/stderr.c
+++ b/src/stdio/stderr.c
@@ -1,7 +1,9 @@
 #include "stdio_impl.h"
 
+#undef stderr
+
 static unsigned char buf[UNGET];
-static FILE f = {
+hidden FILE __stderr_FILE = {
        .buf = buf+UNGET,
        .buf_size = 0,
        .fd = 2,
@@ -12,5 +14,5 @@ static FILE f = {
        .close = __stdio_close,
        .lock = -1,
 };
-FILE *const stderr = &f;
-FILE *const __stderr_used = &f;
+FILE *const stderr = &__stderr_FILE;
+FILE *volatile __stderr_used = &__stderr_FILE;