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-rw-r--r--include/linux/verification.h8
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/verification.h b/include/linux/verification.h
index a655923335ae..f34e50ebcf60 100644
--- a/include/linux/verification.h
+++ b/include/linux/verification.h
@@ -17,6 +17,14 @@
#define VERIFY_USE_SECONDARY_KEYRING ((struct key *)1UL)
#define VERIFY_USE_PLATFORM_KEYRING ((struct key *)2UL)
+static inline int system_keyring_id_check(u64 id)
+{
+ if (id > (unsigned long)VERIFY_USE_PLATFORM_KEYRING)
+ return -EINVAL;
+
+ return 0;
+}
+
/*
* The use to which an asymmetric key is being put.
*/