LibArchive: Make TarInputStream::advance report errors

Fixes this bug that was reported by OSS-Fuzz:
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=52862

1 files changed, 5 insertions, 1 deletions

diff --git a/Meta/Lagom/Fuzzers/FuzzTar.cpp b/Meta/Lagom/Fuzzers/FuzzTar.cpp
index 02d89b14a2..45d4cd9a02 100644
--- a/Meta/Lagom/Fuzzers/FuzzTar.cpp
+++ b/Meta/Lagom/Fuzzers/FuzzTar.cpp
@@ -16,7 +16,7 @@ extern "C" int LLVMFuzzerTestOneInput(uint8_t const* data, size_t size)
     if (!tar_stream.valid())
         return 0;
 
-    for (; !tar_stream.finished(); tar_stream.advance()) {
+    while (!tar_stream.finished()) {
         auto const& header = tar_stream.header();
 
         if (!header.content_is_like_extended_header())
@@ -33,6 +33,10 @@ extern "C" int LLVMFuzzerTestOneInput(uint8_t const* data, size_t size)
         default:
             return 0;
         }
+
+        auto maybe_error = tar_stream.advance();
+        if (maybe_error.is_error())
+            return 0;
     }
 
     return 0;