linux-kernel - [PATCH 2/2] bpftool: add fPIE option for bpftool

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Message-ID: <20220924101209.50653-3-liuxin350@huawei.com>
Date:   Sat, 24 Sep 2022 18:12:09 +0800
From:   Xin Liu <liuxin350@...wei.com>
To:     <ast@...nel.org>, <daniel@...earbox.net>, <andrii@...nel.org>,
        <martin.lau@...ux.dev>, <song@...nel.org>, <yhs@...com>,
        <john.fastabend@...il.com>, <kpsingh@...nel.org>, <sdf@...gle.com>,
        <haoluo@...gle.com>, <jolsa@...nel.org>
CC:     <bpf@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <yanan@...wei.com>, <wuchangye@...wei.com>,
        <xiesongyang@...wei.com>, <zhudi2@...wei.com>,
        <kongweibin2@...wei.com>, <liuxin350@...wei.com>
Subject: [PATCH 2/2] bpftool: add fPIE option for bpftool

Use the fPIE option to compile bpftool to improve bpftool security.

Signed-off-by: Xin Liu <liuxin350@...wei.com>
---
 tools/bpf/bpftool/Makefile | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/bpf/bpftool/Makefile b/tools/bpf/bpftool/Makefile
index 4a95c017ad4c..d1cd21214388 100644
--- a/tools/bpf/bpftool/Makefile
+++ b/tools/bpf/bpftool/Makefile
@@ -72,6 +72,7 @@ bash_compdir ?= /usr/share/bash-completion/completions
 
 CFLAGS += -O2
 CFLAGS += -W -Wall -Wextra -Wno-unused-parameter -Wno-missing-field-initializers
+CFLAGS += -pie -fPIE
 CFLAGS += $(filter-out -Wswitch-enum -Wnested-externs,$(EXTRA_WARNINGS))
 CFLAGS += -DPACKAGE='"bpftool"' -D__EXPORTED_HEADERS__ \
 	-I$(or $(OUTPUT),.) \
-- 
2.33.0