X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=blobdiff_plain;f=sshzlib.c;h=ee1bc42d3054b8707ea41ffa04da5719048ec205;hb=08d4ca078763518ba377ac59a86a1580e6214c27;hp=8a64e3563ee6318104d26a19b753dacd8385cd2a;hpb=e2a5c6b6799ddfa9ca03b6f7fd13d0012e7b2977;p=PuTTY.git

diff --git a/sshzlib.c b/sshzlib.c
index 8a64e356..ee1bc42d 100644
--- a/sshzlib.c
+++ b/sshzlib.c
@@ -1234,6 +1234,8 @@ int zlib_decompress_block(void *handle, unsigned char *block, int len,
 		goto finished;
 	    if (code == -2)
 		goto decode_error;
+	    if (code >= 30)            /* dist symbols 30 and 31 are invalid */
+		goto decode_error;
 	    dctx->state = GOTDISTSYM;
 	    dctx->sym = code;
 	    break;
@@ -1364,6 +1366,7 @@ int main(int argc, char **argv)
             sfree(outbuf);
         } else {
             fprintf(stderr, "decoding error\n");
+            fclose(fp);
             return 1;
         }
     }