linux-kernel - [PATCH bpf-next] libbpf: poison strlcpy()

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Date:   Thu,  5 Jan 2023 22:36:33 +0800
From:   Rong Tao <rtoax@...mail.com>
To:     andrii@...nel.org
Cc:     rongtao@...tc.cn, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        Martin KaFai Lau <martin.lau@...ux.dev>,
        Song Liu <song@...nel.org>, Yonghong Song <yhs@...com>,
        John Fastabend <john.fastabend@...il.com>,
        KP Singh <kpsingh@...nel.org>,
        Stanislav Fomichev <sdf@...gle.com>,
        Hao Luo <haoluo@...gle.com>, Jiri Olsa <jolsa@...nel.org>,
        bpf@...r.kernel.org (open list:BPF [LIBRARY] (libbpf)),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH bpf-next] libbpf: poison strlcpy()

From: Rong Tao <rongtao@...tc.cn>

Since commit 9fc205b413b3("libbpf: Add sane strncpy alternative and use
it internally") introduce libbpf_strlcpy(), thus add strlcpy() to a poison
list to prevent accidental use of it.

Signed-off-by: Rong Tao <rongtao@...tc.cn>
---
 tools/lib/bpf/libbpf_internal.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/tools/lib/bpf/libbpf_internal.h b/tools/lib/bpf/libbpf_internal.h
index 377642ff51fc..2d26ded383ca 100644
--- a/tools/lib/bpf/libbpf_internal.h
+++ b/tools/lib/bpf/libbpf_internal.h
@@ -20,8 +20,8 @@
 /* make sure libbpf doesn't use kernel-only integer typedefs */
 #pragma GCC poison u8 u16 u32 u64 s8 s16 s32 s64
 
-/* prevent accidental re-addition of reallocarray() */
-#pragma GCC poison reallocarray
+/* prevent accidental re-addition of reallocarray()/strlcpy() */
+#pragma GCC poison reallocarray strlcpy
 
 #include "libbpf.h"
 #include "btf.h"
-- 
2.39.0