linux-kernel - [PATCH] ipc/msg: Replace one-element array with flexible array member

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Message-ID: <20240930195824.153648-2-thorsten.blum@linux.dev>
Date: Mon, 30 Sep 2024 21:58:22 +0200
From: Thorsten Blum <thorsten.blum@...ux.dev>
To: Andrew Morton <akpm@...ux-foundation.org>,
	Jiebin Sun <jiebin.sun@...el.com>,
	Tim Chen <tim.c.chen@...ux.intel.com>
Cc: linux-hardening@...r.kernel.org,
	Thorsten Blum <thorsten.blum@...ux.dev>,
	linux-kernel@...r.kernel.org
Subject: [PATCH] ipc/msg: Replace one-element array with flexible array member

Replace the deprecated one-element array with a modern flexible array
member in the struct compat_msgbuf.

There are no binary differences after this conversion.

Link: https://github.com/KSPP/linux/issues/79
Signed-off-by: Thorsten Blum <thorsten.blum@...ux.dev>
---
 ipc/msg.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/ipc/msg.c b/ipc/msg.c
index fd08b3cb36d7..ee6af4fe52bf 100644
--- a/ipc/msg.c
+++ b/ipc/msg.c
@@ -978,7 +978,7 @@ SYSCALL_DEFINE4(msgsnd, int, msqid, struct msgbuf __user *, msgp, size_t, msgsz,
 
 struct compat_msgbuf {
 	compat_long_t mtype;
-	char mtext[1];
+	char mtext[];
 };
 
 long compat_ksys_msgsnd(int msqid, compat_uptr_t msgp,
-- 
2.46.2