Fixed trying to uncompress after compressing in gzip direct mode which is not supported by gz functions.

https://oss-fuzz.com/testcase-detail/6194422837542912

1 files changed, 6 insertions, 1 deletions

diff --git a/test/fuzz/minigzip_fuzzer.c b/test/fuzz/minigzip_fuzzer.c
index 6703ac5..0c7a79a 100644
--- a/test/fuzz/minigzip_fuzzer.c
+++ b/test/fuzz/minigzip_fuzzer.c
@@ -295,7 +295,12 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t dataLen) {
     }
 
     file_compress(inFileName, outmode);
-    file_uncompress(outFileName);
+
+    /* gzopen does not support reading in direct mode */
+    if (outmode[3] == 'T')
+        inFileName = outFileName;
+    else
+        file_uncompress(outFileName);
 
     /* Check that the uncompressed file matches the input data. */
     in = fopen(inFileName, "rb");