Enforce module signatures when securelevel is greater than 0

If securelevel has been set to 1 or greater, require that all modules have
valid signatures.

Signed-off-by: Matthew Garrett <mjg59@srcf.ucam.org>
Gbp-Pq: Topic features/all/securelevel
Gbp-Pq: Name enforce-module-signatures-when-securelevel-is-greate.patch

diff --git a/kernel/module.c b/kernel/module.c
index 07bfb9971f2fb7b55f52bbe677e5f9afd8b84d53..fd798970491ebd55c1430ac3b25cffac43e16daa 100644 (file)
--- a/kernel/module.c
+++ b/kernel/module.c
@@ -2745,7 +2745,7 @@ static int module_sig_check(struct load_info *info, int flags)
        }
 
        /* Not having a signature is only an error if we're strict. */
-       if (err == -ENOKEY && !sig_enforce)
+       if ((err == -ENOKEY && !sig_enforce) && (get_securelevel() <= 0))
                err = 0;
 
        return err;