linux-kernel - [PATCH] kconfig: qconf: use delete[] instead of delete to free array

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Date:   Thu, 30 Jul 2020 00:29:04 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        David Binderman <dcb314@...mail.com>,
        Mauro Carvalho Chehab <mchehab+huawei@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH] kconfig: qconf: use delete[] instead of delete to free array

cppcheck reports "Mismatching allocation and deallocation".

To make cppcheck check qconf.cc, you need to ensure qconf.moc
is not remaining.

$ rm -f scripts/kconfig/qconf.moc
$ cppcheck scripts/kconfig/qconf.cc
Checking scripts/kconfig/qconf.cc ...
scripts/kconfig/qconf.cc:1242:10: error: Mismatching allocation and deallocation: data [mismatchAllocDealloc]
  delete data;
         ^
scripts/kconfig/qconf.cc:1236:15: note: Mismatching allocation and deallocation: data
 char *data = new char[count + 1];
              ^
scripts/kconfig/qconf.cc:1242:10: note: Mismatching allocation and deallocation: data
  delete data;
         ^
scripts/kconfig/qconf.cc:1255:10: error: Mismatching allocation and deallocation: data [mismatchAllocDealloc]
  delete data;
         ^
scripts/kconfig/qconf.cc:1236:15: note: Mismatching allocation and deallocation: data
 char *data = new char[count + 1];
              ^
scripts/kconfig/qconf.cc:1255:10: note: Mismatching allocation and deallocation: data
  delete data;
         ^

Fixes: c4f7398bee9c ("kconfig: qconf: make debug links work again")
Reported-by: David Binderman <dcb314@...mail.com>
Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---

 scripts/kconfig/qconf.cc | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/scripts/kconfig/qconf.cc b/scripts/kconfig/qconf.cc
index 4a616128a154..5a9e83a2f8c2 100644
--- a/scripts/kconfig/qconf.cc
+++ b/scripts/kconfig/qconf.cc
@@ -1239,7 +1239,7 @@ void ConfigInfoView::clicked(const QUrl &url)
 
 	if (count < 1) {
 		qInfo() << "Clicked link is empty";
-		delete data;
+		delete[] data;
 		return;
 	}
 
@@ -1252,7 +1252,7 @@ void ConfigInfoView::clicked(const QUrl &url)
 	result = sym_re_search(data);
 	if (!result) {
 		qInfo() << "Clicked symbol is invalid:" << data;
-		delete data;
+		delete[] data;
 		return;
 	}
 
-- 
2.25.1