leaking_addresses: Always print a trailing newline

[ Upstream commit cf2a85efdade117e2169d6e26641016cbbf03ef0 ]

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/

Signed-off-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20211008111626.151570317@infradead.org
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/scripts/leaking_addresses.pl b/scripts/leaking_addresses.pl
index b2d8b8a..8f636a2 100755 (executable)
--- 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;