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Re: [PATCH] checkpatch: Fix use of uninitialized value
From: |
Greg Kurz |
Subject: |
Re: [PATCH] checkpatch: Fix use of uninitialized value |
Date: |
Fri, 9 Apr 2021 07:40:11 +0200 |
On Thu, 8 Apr 2021 10:49:13 -0700
Isaku Yamahata <isaku.yamahata@gmail.com> wrote:
>
> How about initializing them explicitly as follows?
> ($realfile ne '') prevents the case realfile eq '' && acpi_testexpted eq ''.
> Anyway your patch also should fix it. So
> Reviewed-by: Isaku Yamahata <isaku.yamahata@intel.com>
>
>
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 8f7053ec9b..2eb894a628 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -1325,8 +1325,8 @@ sub process {
> my %suppress_whiletrailers;
> my %suppress_export;
>
> - my $acpi_testexpected;
> - my $acpi_nontestexpected;
> + my $acpi_testexpected = '';
> + my $acpi_nontestexpected = '';
>
Hmm... I haven't tried but I believe this will break when these are
passed to checkfilename() :
sub checkfilename {
my ($name, $acpi_testexpected, $acpi_nontestexpected) = @_;
[...]
if (defined $$acpi_testexpected and defined $$acpi_nontestexpected) {
ERROR("Do not add expected files together with tests, " .
> # Pre-scan the patch sanitizing the lines.
>
>
> On Thu, Apr 08, 2021 at 08:51:19AM +0200,
> Greg Kurz <groug@kaod.org> wrote:
>
> > checkfilename() doesn't always set $acpi_testexpected. Fix the following
> > warning:
> >
> > Use of uninitialized value $acpi_testexpected in string eq at
> > ./scripts/checkpatch.pl line 1529.
> >
> > Fixes: d2f1af0e4120 ("checkpatch: don't emit warning on newly created acpi
> > data files")
> > Cc: isaku.yamahata@intel.com
> > Signed-off-by: Greg Kurz <groug@kaod.org>
> > ---
> > scripts/checkpatch.pl | 1 +
> > 1 file changed, 1 insertion(+)
> >
> > diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> > index 8f7053ec9b26..3d185cceac94 100755
> > --- a/scripts/checkpatch.pl
> > +++ b/scripts/checkpatch.pl
> > @@ -1532,6 +1532,7 @@ sub process {
> > ($line =~ /\{\s*([\w\/\.\-]*)\s*\=\>\s*([\w\/\.\-]*)\s*\}/
> > &&
> > (defined($1) || defined($2)))) &&
> > !(($realfile ne '') &&
> > + defined($acpi_testexpected) &&
> > ($realfile eq $acpi_testexpected))) {
> > $reported_maintainer_file = 1;
> > WARN("added, moved or deleted file(s), does MAINTAINERS
> > need updating?\n" . $herecurr);
> >
> >
> >
>