From nobody Thu Jun 18 08:02:34 2026 Received: from cstnet.cn (smtp25.cstnet.cn [159.226.251.25]) (using TLSv1.2 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 2058B2D73A0; Fri, 17 Apr 2026 07:29:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=159.226.251.25 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776410948; cv=none; b=r+B/YC8JTVDtQQsmMBPG+94khgciejVj6Tn/7s5JBZKpkvhZJrdmvl+hgr7uYB8kZEHYepqWnXIhHzLXyku9fNBtmpaZC7v9z2v9LmNTFqcSSvyduTyb1CB2Rk0pGJALeiyT5uXd/BJAva4H3b77mETLcjeRPyJ3TLsYeS+phGo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1776410948; c=relaxed/simple; bh=KmreH0zVYZhnWxTV0p2Hb8kKjFC19TOeLTWcMLm5qTk=; h=From:To:Cc:Subject:Date:Message-ID:MIME-Version; b=SSfO6wGSeOO+gV4EvRtWoS8r+sis3hIfuWS8wUIcp5OIwOia836t+TcSnI8QFFe5BkInwRmQ+XadDF3IqCAd4Z5DzChBE7NH0hrBWL8XyW0l2RQyviw8wxStGoZ779xq1Vd76j06KSFsMH61Ii+Yk5TMkgiMeT+PGdcv3wmqrvI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn; spf=pass smtp.mailfrom=iscas.ac.cn; arc=none smtp.client-ip=159.226.251.25 Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=iscas.ac.cn Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=iscas.ac.cn Received: from localhost.localdomain (unknown [111.196.245.116]) by APP-05 (Coremail) with SMTP id zQCowABn9gkr4eFpn77XDQ--.24145S2; Fri, 17 Apr 2026 15:28:44 +0800 (CST) From: Pengpeng Hou To: Russell King , Jiri Bohac Cc: Andrew Morton , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Pengpeng Hou , stable@vger.kernel.org Subject: [PATCH] ARM: setup: NUL-terminate the fpe emulator type Date: Fri, 17 Apr 2026 15:28:41 +0800 Message-ID: <20260417072841.88838-1-pengpeng@iscas.ac.cn> X-Mailer: git-send-email 2.50.1 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 X-CM-TRANSID: zQCowABn9gkr4eFpn77XDQ--.24145S2 X-Coremail-Antispam: 1UD129KBjvdXoWruF48JFy7Ar43Cr4DXr4xZwb_yoWDXFgEqr 93t34DGw10v3WIvFW7tw43ZryxKa1UWF1vgr93Kw47Arn8Xr15u3s5ZF9aywn3Wrs7Kr9a vw4DGFWagr10gjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUIcSsGvfJTRUUUbcAFF20E14v26r4j6ryUM7CY07I20VC2zVCF04k26cxKx2IYs7xG 6rWj6s0DM7CIcVAFz4kK6r1j6r18M28lY4IEw2IIxxk0rwA2F7IY1VAKz4vEj48ve4kI8w A2z4x0Y4vE2Ix0cI8IcVAFwI0_Xr0_Ar1l84ACjcxK6xIIjxv20xvEc7CjxVAFwI0_Gr0_ Cr1l84ACjcxK6I8E87Iv67AKxVW0oVCq3wA2z4x0Y4vEx4A2jsIEc7CjxVAFwI0_GcCE3s 1le2I262IYc4CY6c8Ij28IcVAaY2xG8wAqx4xG64xvF2IEw4CE5I8CrVC2j2WlYx0E2Ix0 cI8IcVAFwI0_Jr0_Jr4lYx0Ex4A2jsIE14v26r4j6F4UMcvjeVCFs4IE7xkEbVWUJVW8Jw ACjcxG0xvY0x0EwIxGrwACjI8F5VA0II8E6IAqYI8I648v4I1lc7CjxVAaw2AFwI0_JF0_ Jw1l42xK82IYc2Ij64vIr41l4I8I3I0E4IkC6x0Yz7v_Jr0_Gr1lx2IqxVAqx4xG67AKxV WUJVWUGwC20s026x8GjcxK67AKxVWUGVWUWwC2zVAF1VAY17CE14v26r126r1DMIIYrxkI 7VAKI48JMIIF0xvE2Ix0cI8IcVAFwI0_Jr0_JF4lIxAIcVC0I7IYx2IY6xkF7I0E14v26r 1j6r4UMIIF0xvE42xK8VAvwI8IcIk0rVWUJVWUCwCI42IY6I8E87Iv67AKxVW8JVWxJwCI 42IY6I8E87Iv6xkF7I0E14v26r4j6r4UJbIYCTnIWIevJa73UjIFyTuYvjfUejjgDUUUU X-CM-SenderInfo: pshqw1xhqjqxpvfd2hldfou0/ Content-Type: text/plain; charset="utf-8" fpe_setup() copies up to 8 bytes from the boot command line into the fixed fpe_type[8] buffer with memcpy() and leaves the array without a terminating NUL when the parameter is exactly 8 bytes long. fpe_init() later compares that buffer against "nwfpe" with strcmp(), which can read past the end of fpe_type. Use strscpy() so the boot parameter stays NUL-terminated before it is used as a C string. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Cc: stable@vger.kernel.org Signed-off-by: Pengpeng Hou --- arch/arm/kernel/setup.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c index 0bfd66c7ada0..c07bc6a380c5 100644 --- a/arch/arm/kernel/setup.c +++ b/arch/arm/kernel/setup.c @@ -69,7 +69,7 @@ char fpe_type[8]; =20 static int __init fpe_setup(char *line) { - memcpy(fpe_type, line, 8); + strscpy(fpe_type, line, sizeof(fpe_type)); return 1; } =20 --=20 2.50.1 (Apple Git-155)