Ignore checksum mismatches when fuzzing tar archives (#2378)

This should speed up fuzzing just a bit, so we
can find more bugs!

(cherry picked from commit 971c043a1df850c9ccfc155c80c64b0673d7daa4)

diff --git a/libarchive/archive_read_support_format_tar.c b/libarchive/archive_read_support_format_tar.c
index a0ff8b1dbb256c3739705b7db576b0da1308c818..ecaf6c392d9a2ecd81e2858d159233003eb3b329 100644 (file)
--- a/libarchive/archive_read_support_format_tar.c
+++ b/libarchive/archive_read_support_format_tar.c
@@ -1005,7 +1005,12 @@ checksum(struct archive_read *a, const void *h)
        if (sum == check)
                return (1);
 
+#if DONT_FAIL_ON_CRC_ERROR
+       /* Speed up fuzzing by pretending the checksum is always right. */
+       return (1);
+#else
        return (0);
+#endif
 }
 
 /*