linux-kernel - [PATCH] checkpatch: add check for continue statement in UNNECESSARY

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-Id: <20211001192628.19179-1-utkarshverma294@gmail.com>
Date:   Sat,  2 Oct 2021 00:56:28 +0530
From:   Utkarsh Verma <utkarshverma294@...il.com>
To:     Andy Whitcroft <apw@...onical.com>, Joe Perches <joe@...ches.com>
Cc:     Dwaipayan Ray <dwaipayanray1@...il.com>,
        Lukas Bulwahn <lukas.bulwahn@...il.com>,
        linux-kernel@...r.kernel.org,
        Utkarsh Verma <utkarshverma294@...il.com>
Subject: [PATCH] checkpatch: add check for continue statement in UNNECESSARY_ELSE

UNNECESSARY_ELSE only checks for the usage of else after a return or
break. But the same logic is also true for continue statement.

else used after a continue statement is unnecessary. So add a test
for continue statement also.

Signed-off-by: Utkarsh Verma <utkarshverma294@...il.com>
---
 scripts/checkpatch.pl | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl
index c27d2312cfc3..f5a911aa6b64 100755
--- a/scripts/checkpatch.pl
+++ b/scripts/checkpatch.pl
@@ -4011,15 +4011,16 @@ sub process {
 
 # check indentation of any line with a bare else
 # (but not if it is a multiple line "if (foo) return bar; else return baz;")
-# if the previous line is a break or return and is indented 1 tab more...
+# if the previous line is a break or continue or return and is indented 1 tab more...
 		if ($sline =~ /^\+([\t]+)(?:}[ \t]*)?else(?:[ \t]*{)?\s*$/) {
 			my $tabs = length($1) + 1;
 			if ($prevline =~ /^\+\t{$tabs,$tabs}break\b/ ||
+			    $prevline =~ /^\+\t{$tabs,$tabs}continue\b/ ||
 			    ($prevline =~ /^\+\t{$tabs,$tabs}return\b/ &&
 			     defined $lines[$linenr] &&
 			     $lines[$linenr] !~ /^[ \+]\t{$tabs,$tabs}return/)) {
 				WARN("UNNECESSARY_ELSE",
-				     "else is not generally useful after a break or return\n" . $hereprev);
+				     "else is not generally useful after a break or continue or return\n" . $hereprev);
 			}
 		}
 
-- 
2.25.1