linux-hardening - [PATCH AUTOSEL 4.14 24/39] leaking_addresses: Always print a trailing newline

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Date:   Mon,  8 Nov 2021 20:06:34 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Kees Cook <keescook@...omium.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Sasha Levin <sashal@...nel.org>, me@...in.cc,
        tycho@...ho.pizza, linux-hardening@...r.kernel.org
Subject: [PATCH AUTOSEL 4.14 24/39] leaking_addresses: Always print a trailing newline

From: Kees Cook <keescook@...omium.org>

[ 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@...omium.org>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Link: https://lkml.kernel.org/r/20211008111626.151570317@infradead.org
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 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 2977371b29563..de5196c08943a 100755
--- a/scripts/leaking_addresses.pl
+++ b/scripts/leaking_addresses.pl
@@ -262,8 +262,9 @@ sub parse_file
 
 	open my $fh, "<", $file or return;
 	while ( <$fh> ) {
+		chomp;
 		if (may_leak_address($_)) {
-			print $file . ': ' . $_;
+			printf("$file: $_\n");
 		}
 	}
 	close $fh;
-- 
2.33.0