From e970e429b64bc6b6314e7f96b293db87097a79d8 Mon Sep 17 00:00:00 2001 From: Giuliano <3684609+GMagician@users.noreply.github.com> Date: Sun, 10 Jun 2018 05:03:49 +0200 Subject: [PATCH] [2.0.x] Fix null check in lsDive (#10978) --- Marlin/src/sd/cardreader.cpp | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/Marlin/src/sd/cardreader.cpp b/Marlin/src/sd/cardreader.cpp index 53de807c2..159086c82 100644 --- a/Marlin/src/sd/cardreader.cpp +++ b/Marlin/src/sd/cardreader.cpp @@ -110,8 +110,8 @@ void CardReader::lsDive(const char *prepend, SdFile parent, const char * const m createFilename(dosFilename, p); // Allocate enough stack space for the full path to a folder, trailing slash, and nul - bool prepend_is_empty = (prepend[0] == '\0'); - int len = (prepend_is_empty ? 1 : strlen(prepend)) + strlen(dosFilename) + 1 + 1; + const bool prepend_is_empty = (!prepend || prepend[0] == '\0'); + const int len = (prepend_is_empty ? 1 : strlen(prepend)) + strlen(dosFilename) + 1 + 1; char path[len]; // Append the FOLDERNAME12/ to the passed string.