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* [PATCH] kconfig: streamline_config.pl: check defined(ENV variable) before using it
@ 2020-08-26 21:21 Randy Dunlap
  2020-09-02 16:46 ` Masahiro Yamada
  0 siblings, 1 reply; 6+ messages in thread
From: Randy Dunlap @ 2020-08-26 21:21 UTC (permalink / raw)
  To: linux-kbuild, LKML, Steven Rostedt, Masahiro Yamada; +Cc: Changbin Du

From: Randy Dunlap <rdunlap@infradead.org>

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>
Cc: Changbin Du <changbin.du@gmail.com>
Cc: Steven Rostedt (VMware) <rostedt@goodmis.org>
Cc: Masahiro Yamada <masahiroy@kernel.org>
Acked-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
 scripts/kconfig/streamline_config.pl |    5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

--- linux-next-20200825.orig/scripts/kconfig/streamline_config.pl
+++ linux-next-20200825/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]};


^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2020-09-03  2:43 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-08-26 21:21 [PATCH] kconfig: streamline_config.pl: check defined(ENV variable) before using it Randy Dunlap
2020-09-02 16:46 ` Masahiro Yamada
2020-09-02 18:22   ` Nathan Royce
2020-09-03  2:13     ` Masahiro Yamada
2020-09-03  2:18       ` Nathan Royce
2020-09-03  2:42         ` Masahiro Yamada

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