efivars: properly NUL terminate EFI variables when reading

A follow-up for 35b9eb0a72b6254568a294f0ebd011da20958a64.

diff --git a/src/basic/efivars.c b/src/basic/efivars.c
index bfde67a883b9fb7e56791ae0dcbcd28b2a3b806e..ea43abd7b3f63ca7d8342197ae4c20276df45270 100644 (file)
--- a/src/basic/efivars.c
+++ b/src/basic/efivars.c
@@ -93,8 +93,8 @@ int efi_get_variable(
                 assert(n <= st.st_size - 4);
 
                 /* Always NUL terminate (2 bytes, to protect UTF-16) */
-                ((char*) buf)[n - 4] = 0;
-                ((char*) buf)[n - 4 + 1] = 0;
+                ((char*) buf)[n] = 0;
+                ((char*) buf)[n + 1] = 0;
         } else
                 /* Assume that the reported size is accurate */
                 n = st.st_size - 4;