[CritFix] Fix leak in `gzip` function

Issue: #4564

diff --git a/src/libutil/util.c b/src/libutil/util.c
index 4be7cc620b78991201dfef99d9c4358fde96f128..deba3e80765177e60c7b471a3d0120f312b6d662 100644 (file)
--- a/src/libutil/util.c
+++ b/src/libutil/util.c
@@ -1,11 +1,11 @@
-/*-
- * Copyright 2017 Vsevolod Stakhov
+/*
+ * Copyright 2023 Vsevolod Stakhov
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *   http://www.apache.org/licenses/LICENSE-2.0
+ *    http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
@@ -2231,6 +2231,7 @@ rspamd_fstring_gzip(rspamd_fstring_t **in)
        strm.avail_out = sizeof(temp) > buf->allocated ? buf->allocated : sizeof(temp);
        ret = deflate(&strm, Z_FINISH);
        if (ret == Z_STREAM_ERROR) {
+               deflateEnd(&strm);
                return FALSE;
        }
 
@@ -2247,6 +2248,8 @@ rspamd_fstring_gzip(rspamd_fstring_t **in)
                if (ret != Z_BUF_ERROR || strm.avail_in == 0) {
                        buf->len = strm.next_out - (unsigned char *) buf->str;
                        *in = buf;
+                       deflateEnd(&strm);
+
                        return ret == Z_STREAM_END;
                }
        }
@@ -2267,6 +2270,7 @@ rspamd_fstring_gzip(rspamd_fstring_t **in)
        g_free(hold);
        buf->len = strm.next_out - (unsigned char *) buf->str;
        *in = buf;
+       deflateEnd(&strm);
 
        return ret == Z_STREAM_END;
 }