module: prevent warning when finit_module a 0 sized file

[~andy/linux] / kernel / module.c

diff --git a/kernel/module.c b/kernel/module.c
index 250092c1d57d6cf582ef801f70a10969e19abab2..41bc1189b0613fd42941b6342c05c857f3ccd035 100644 (file)
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2527,6 +2527,13 @@ static int copy_module_from_fd(int fd, struct load_info *info)
                err = -EFBIG;
                goto out;
        }
+
+       /* Don't hand 0 to vmalloc, it whines. */
+       if (stat.size == 0) {
+               err = -EINVAL;
+               goto out;
+       }
+
        info->hdr = vmalloc(stat.size);
        if (!info->hdr) {
                err = -ENOMEM;