diff options
Diffstat (limited to 'src/shared/efi-loader.c')
| -rw-r--r-- | src/shared/efi-loader.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/shared/efi-loader.c b/src/shared/efi-loader.c index 1340412..b9fe26b 100644 --- a/src/shared/efi-loader.c +++ b/src/shared/efi-loader.c @@ -99,7 +99,8 @@ int efi_loader_get_entries(char ***ret) { if (r < 0) return r; - /* The variable contains a series of individually NUL terminated UTF-16 strings. */ + /* The variable contains a series of individually NUL terminated UTF-16 strings. We gracefully + * consider the final NUL byte optional (i.e. the last string may or may not end in a NUL byte).*/ for (size_t i = 0, start = 0;; i++) { _cleanup_free_ char *decoded = NULL; @@ -113,6 +114,11 @@ int efi_loader_get_entries(char ***ret) { if (!end && entries[i] != 0) continue; + /* Empty string at the end of variable? That's the trailer, we are done (i.e. we have a final + * NUL terminator). */ + if (end && start == i) + break; + /* We reached the end of a string, let's decode it into UTF-8 */ decoded = utf16_to_utf8(entries + start, (i - start) * sizeof(char16_t)); if (!decoded) @@ -125,7 +131,8 @@ int efi_loader_get_entries(char ***ret) { } else log_debug("Ignoring invalid loader entry '%s'.", decoded); - /* We reached the end of the variable */ + /* Exit the loop if we reached the end of the variable (i.e. we do not have a final NUL + * terminator) */ if (end) break; |