libsandbox: use mmap directly for internal memory

Some packages that do library tricks like sandbox override the mmap()
symbols.  If their implementation ends up calling functions that sandbox
has overridden, then we can easily hit an infinite loop.
	sb-fopen -> sb-malloc -> external mmap -> sb-open -> whoops!

So for the internal memory functions, make sure we call directly to the
C library's mmap() functions.  This way our internal memory implementation
should be free from external forces.

URL: http://bugs.gentoo.org/290249
Reported-by: Diego E. Pettenò <flameeyes@gentoo.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/libsandbox/wrappers.c b/libsandbox/wrappers.c
index f587614..42b2df1 100644
--- a/libsandbox/wrappers.c
+++ b/libsandbox/wrappers.c
@@ -34,7 +34,7 @@ static void load_libc_handle(void)
 	}
 }
 
-static void *get_dlsym(const char *symname, const char *symver)
+void *get_dlsym(const char *symname, const char *symver)
 {
 	void *symaddr;