explicitly reject empty names in dynamic linker load_library function

[musl] / src / ldso / dynlink.c

diff --git a/src/ldso/dynlink.c b/src/ldso/dynlink.c
index 6b7f0f3..12f14f7 100644 (file)
--- a/src/ldso/dynlink.c
+++ b/src/ldso/dynlink.c
@@ -663,6 +663,11 @@ static struct dso *load_library(const char *name, struct dso *needed_by)
        int n_th = 0;
        int is_self = 0;
 
+       if (!*name) {
+               errno = EINVAL;
+               return 0;
+       }
+
        /* Catch and block attempts to reload the implementation itself */
        if (name[0]=='l' && name[1]=='i' && name[2]=='b') {
                static const char *rp, reserved[] =