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([116.128.244.171]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-1f6323562b6sm73128515ad.73.2024.06.03.21.42.32 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 03 Jun 2024 21:42:35 -0700 (PDT) From: liujinlong X-Google-Original-From: liujinlong To: kees@kernel.org Cc: thunder.leizhen@huawei.com, yonghong.song@linux.dev, ndesaulniers@google.com, song@kernel.org, ardb@kernel.org, maninder1.s@samsung.com, azeemshaikh38@gmail.com, linux-kernel@vger.kernel.org, liujinlong , k2ci Subject: [PATCH] sprint_symbol: Replace strcpy with memmove to handle potential overlap Date: Tue, 4 Jun 2024 12:42:28 +0800 Message-Id: <20240604044228.2910712-1-liujinlong@kylinos.cn> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset="utf-8" In the function __sprint_symbol, replace strcpy with memmove to ensure correct behavior even if the source and destination buffers overlap. This change prevents potential undefined behavior flagged by recent compilers as [-Werror=3Drestrict]. Reported-by: k2ci Signed-off-by: liujinlong --- kernel/kallsyms.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/kallsyms.c b/kernel/kallsyms.c index 22ea19a36e6e..3c3a77fcd020 100644 --- a/kernel/kallsyms.c +++ b/kernel/kallsyms.c @@ -489,7 +489,7 @@ static int __sprint_symbol(char *buffer, unsigned long = address, return sprintf(buffer, "0x%lx", address - symbol_offset); =20 if (name !=3D buffer) - strcpy(buffer, name); + memmove(buffer, name, strlen(name) + 1); len =3D strlen(buffer); offset -=3D symbol_offset; =20 --=20 2.17.1