* modules/filters/mod_deflate.c (deflate_in_filter): Handle FLUSH in

  the input brigade even if done inflating (ctx->done is true), but
  don't try to flush the inflate stream in that case.  (Caught by
  Coverity)

Github: closes #280

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1895552 13f79535-47bb-0310-9956-ffa450edef68
(cherry picked from commit 6aef687)

Author: notroj

modules/filters/mod_deflate.c

@@ -1310,38 +1310,40 @@ static apr_status_t deflate_in_filter(ap_filter_t *f,
             if (APR_BUCKET_IS_FLUSH(bkt)) {
                 apr_bucket *tmp_b;
 
-                ctx->inflate_total += ctx->stream.avail_out;
-                zRC = inflate(&(ctx->stream), Z_SYNC_FLUSH);
-                ctx->inflate_total -= ctx->stream.avail_out;
-                if (zRC != Z_OK) {
-                    inflateEnd(&ctx->stream);
-                    ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01391)
-                                  "Zlib error %d inflating data (%s)", zRC,
-                                  ctx->stream.msg);
-                    return APR_EGENERAL;
-                }
+                if (!ctx->done) {
+                    ctx->inflate_total += ctx->stream.avail_out;
+                    zRC = inflate(&(ctx->stream), Z_SYNC_FLUSH);
+                    ctx->inflate_total -= ctx->stream.avail_out;
+                    if (zRC != Z_OK) {
+                        inflateEnd(&ctx->stream);
+                        ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(01391)
+                                      "Zlib error %d inflating data (%s)", zRC,
+                                      ctx->stream.msg);
+                        return APR_EGENERAL;
+                    }
 
-                if (inflate_limit && ctx->inflate_total > inflate_limit) { 
-                    inflateEnd(&ctx->stream);
-                    ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02647)
-                            "Inflated content length of %" APR_OFF_T_FMT
-                            " is larger than the configured limit"
-                            " of %" APR_OFF_T_FMT, 
-                            ctx->inflate_total, inflate_limit);
-                    return APR_ENOSPC;
-                }
+                    if (inflate_limit && ctx->inflate_total > inflate_limit) { 
+                        inflateEnd(&ctx->stream);
+                        ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02647)
+                                      "Inflated content length of %" APR_OFF_T_FMT
+                                      " is larger than the configured limit"
+                                      " of %" APR_OFF_T_FMT, 
+                                      ctx->inflate_total, inflate_limit);
+                        return APR_ENOSPC;
+                    }
 
-                if (!check_ratio(r, ctx, dc)) {
-                    inflateEnd(&ctx->stream);
-                    ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02805)
-                            "Inflated content ratio is larger than the "
-                            "configured limit %i by %i time(s)",
-                            dc->ratio_limit, dc->ratio_burst);
-                    return APR_EINVAL;
-                }
+                    if (!check_ratio(r, ctx, dc)) {
+                        inflateEnd(&ctx->stream);
+                        ap_log_rerror(APLOG_MARK, APLOG_WARNING, 0, r, APLOGNO(02805)
+                                      "Inflated content ratio is larger than the "
+                                      "configured limit %i by %i time(s)",
+                                      dc->ratio_limit, dc->ratio_burst);
+                        return APR_EINVAL;
+                    }
 
-                consume_buffer(ctx, c, c->bufferSize - ctx->stream.avail_out,
-                               UPDATE_CRC, ctx->proc_bb);
+                    consume_buffer(ctx, c, c->bufferSize - ctx->stream.avail_out,
+                                   UPDATE_CRC, ctx->proc_bb);
+                }
 
                 /* Flush everything so far in the returning brigade, but continue
                  * reading should EOS/more follow (don't lose them).