Re: [PATCH v2 6/6] leaking_addresses: Always print a trailing newline

[Tycho Andersen]

On Wed, Sep 29, 2021 at 03:02:18PM -0700, Kees Cook wrote:
> For files that lack trailing newlines and match a leaking address (e.g.
> wchan[1]), the leaking_addresses.pl report would run together with the
> next line, making things look corrupted.
> 
> Unconditionally remove the newline on input, and write it back out on
> output.
> 
> [1] https://lore.kernel.org/all/20210103142726.GC30643@xsang-OptiPlex-9020/
> 
> Cc: "Tobin C. Harding" <me@xxxxxxxx>
> Cc: Tycho Andersen <tycho@tycho.pizza>

Acked-by: Tycho Andersen <tycho@tycho.pizza>

Thanks!

> Cc: linux-hardening@xxxxxxxxxxxxxxx
> Signed-off-by: Kees Cook <keescook@xxxxxxxxxxxx>
> ---
>  scripts/leaking_addresses.pl | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/scripts/leaking_addresses.pl b/scripts/leaking_addresses.pl
> index b2d8b8aa2d99..8f636a23bc3f 100755
> --- a/scripts/leaking_addresses.pl
> +++ b/scripts/leaking_addresses.pl
> @@ -455,8 +455,9 @@ sub parse_file
>  
>  	open my $fh, "<", $file or return;
>  	while ( <$fh> ) {
> +		chomp;
>  		if (may_leak_address($_)) {
> -			print $file . ': ' . $_;
> +			printf("$file: $_\n");
>  		}
>  	}
>  	close $fh;
> -- 
> 2.30.2
>