From 046fc741e35e9dee7c7f7c4173ba3d79f938286f Mon Sep 17 00:00:00 2001
From: Mimi Zohar <zohar@linux.ibm.com>
Date: Tue, 7 Sep 2021 19:59:54 -0700
Subject: [PATCH] checkpatch: make email address check case insensitive
Instead of checkpatch requiring the patch author to exactly match the
signed-off-by tag, commit 48ca2d8ac8a1 ("checkpatch: add new warnings to
author signoff checks.") safely relaxed this requirement.
Although the local-part of an email address (local-part@domain), may be
case sensitive, exploiting the case sensitivity of mailbox local-parts
impedes interoperability and is discouraged. Mailbox domains follow
normal DNS rules and are hence not case sensitive. (Refer to
https://datatracker.ietf.org/doc/html/rfc5321#section-2.4.)
Further relax the patch author and signed-off-by tag comparison by making
the email address check case insensitive.
Link: https://lkml.kernel.org/r/20210816112725.173206-1-zohar@linux.ibm.com
Signed-off-by: Mimi Zohar <zohar@linux.ibm.com>
Acked-by: Joe Perches <joe@perches.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
---
scripts/checkpatch.pl | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index a65753c05a693..161ce7fe5d1e5 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -2909,10 +2909,10 @@ sub process {
my ($email_name, $email_comment, $email_address, $comment1) = parse_email($ctx);
my ($author_name, $author_comment, $author_address, $comment2) = parse_email($author);
- if ($email_address eq $author_address && $email_name eq $author_name) {
+ if (lc $email_address eq lc $author_address && $email_name eq $author_name) {
$author_sob = $ctx;
$authorsignoff = 2;
- } elsif ($email_address eq $author_address) {
+ } elsif (lc $email_address eq lc $author_address) {
$author_sob = $ctx;
$authorsignoff = 3;
} elsif ($email_name eq $author_name) {
--
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