From: Randy Dunlap <rdunlap@infradead.org>
Date: Wed, 26 Aug 2020 21:21:43 +0000 (-0700)
Subject: kconfig: streamline_config.pl: check defined(ENV variable) before using it
X-Git-Tag: v5.10.7~1704^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=a73fbfce2cc28883f659414d598e6e60ca2214b4;p=platform%2Fkernel%2Flinux-rpi.git

kconfig: streamline_config.pl: check defined(ENV variable) before using it

A user reported:
'Use of uninitialized value $ENV{"LMC_KEEP"} in split at
 ./scripts/kconfig/streamline_config.pl line 596.'

so first check that $ENV{LMC_KEEP} is defined before trying
to use it.

Fixes: c027b02d89fd ("streamline_config.pl: add LMC_KEEP to preserve some kconfigs")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
---

diff --git a/scripts/kconfig/streamline_config.pl b/scripts/kconfig/streamline_config.pl
index 19857d1..1c78ba49c 100755
--- a/scripts/kconfig/streamline_config.pl
+++ b/scripts/kconfig/streamline_config.pl
@@ -593,7 +593,10 @@ while ($repeat) {
 }
 
 my %setconfigs;
-my @preserved_kconfigs = split(/:/,$ENV{LMC_KEEP});
+my @preserved_kconfigs;
+if (defined($ENV{'LMC_KEEP'})) {
+	@preserved_kconfigs = split(/:/,$ENV{LMC_KEEP});
+}
 
 sub in_preserved_kconfigs {
     my $kconfig = $config2kfile{$_[0]};