linux-kernel - [PATCH v2] scripts: headers_install: Exit with error on config leak

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Date:   Sat,  2 May 2020 20:29:05 -0700
From:   Siddharth Gupta <sidgup@...eaurora.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Sam Ravnborg <sam@...nborg.org>
Cc:     Siddharth Gupta <sidgup@...eaurora.org>,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2] scripts: headers_install: Exit with error on config leak

Misuse of CONFIG_* in UAPI headers should result in an error as it exposes
configuration of different targets to userspace.

Signed-off-by: Siddharth Gupta <sidgup@...eaurora.org>
---
 scripts/headers_install.sh | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/scripts/headers_install.sh b/scripts/headers_install.sh
index a07668a..94a8335 100755
--- a/scripts/headers_install.sh
+++ b/scripts/headers_install.sh
@@ -64,7 +64,7 @@ configs=$(sed -e '
 	d
 ' $OUTFILE)
 
-# The entries in the following list are not warned.
+# The entries in the following list do not result in an error.
 # Please do not add a new entry. This list is only for existing ones.
 # The list will be reduced gradually, and deleted eventually. (hopefully)
 #
@@ -98,18 +98,19 @@ include/uapi/linux/raw.h:CONFIG_MAX_RAW_DEVS
 
 for c in $configs
 do
-	warn=1
+	leak_error=1
 
 	for ignore in $config_leak_ignores
 	do
 		if echo "$INFILE:$c" | grep -q "$ignore$"; then
-			warn=
+			leak_error=
 			break
 		fi
 	done
 
-	if [ "$warn" = 1 ]; then
-		echo "warning: $INFILE: leak $c to user-space" >&2
+	if [ "$leak_error" = 1 ]; then
+		echo "error: $INFILE: leak $c to user-space" >&2
+		exit 1
 	fi
 done
 
-- 
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