--- zzzz-none-000/linux-4.1.52/fs/jffs2/compr_rtime.c	2018-05-28 02:26:45.000000000 +0000
+++ bcm63-7530ax-731/linux-4.1.52/fs/jffs2/compr_rtime.c	2022-03-02 11:37:13.000000000 +0000
@@ -39,6 +39,11 @@
 
 	memset(positions,0,sizeof(positions));
 
+#if defined (CONFIG_BCM_KF_JFFS)
+	if (*dstlen < 2)
+		return -1;
+
+#endif
 	while (pos < (*sourcelen) && outpos <= (*dstlen)-2) {
 		int backpos, runlen=0;
 		unsigned char value;