linux-kernel - Re: [PATCH] checkpatch: Fix unescaped left brace

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Date:   Sun, 15 Nov 2020 19:43:18 -0800
From:   Joe Perches <joe@...ches.com>
To:     Dwaipayan Ray <dwaipayanray1@...il.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     linux-kernel-mentees@...ts.linuxfoundation.org,
        linux-kernel@...r.kernel.org, lukas.bulwahn@...il.com
Subject: Re: [PATCH] checkpatch: Fix unescaped left brace

On Mon, 2020-11-16 at 01:59 +0530, Dwaipayan Ray wrote:
> There is an unescaped left brace in a regex in OPEN_BRACE
> check. This throws a runtime error when checkpatch is run
> with --fix flag and the OPEN_BRACE check is executed.
> 
> Fix it by escaping the left brace.
> 
> Fixes: 8d1824780f2f ("checkpatch: add --fix option for a couple OPEN_BRACE misuses")
> Signed-off-by: Dwaipayan Ray <dwaipayanray1@...il.com>

Thanks Dwaipayan.

Obviously that code path hasn't been tested in awhile.

I think the notice to require an escape for a { was added back in
perl 5.16 or so.

Acked-by: Joe Perches <joe@...ches.com>

> ---
>  scripts/checkpatch.pl | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
> index 2749f32dffe9..0da6422cd0fd 100755
> --- a/scripts/checkpatch.pl
> +++ b/scripts/checkpatch.pl
> @@ -4505,7 +4505,7 @@ sub process {
>  			    $fix) {
>  				fix_delete_line($fixlinenr, $rawline);
>  				my $fixed_line = $rawline;
> -				$fixed_line =~ /(^..*$Type\s*$Ident\(.*\)\s*){(.*)$/;
> +				$fixed_line =~ /(^..*$Type\s*$Ident\(.*\)\s*)\{(.*)$/;
>  				my $line1 = $1;
>  				my $line2 = $2;
>  				fix_insert_line($fixlinenr, ltrim($line1));