From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 1276D1EF081; Fri, 4 Oct 2024 18:21:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728066068; cv=none; b=mEmNWZ0u+sLwYSl9/4K0z+FN7oMKD5o9rOBa5dNA6ggpXTZKvGtPTu7gTIR5YjIY7sWgNTbAm0inmpIhsWyTaaqzxQQNjsBDK61GNAu92vmfeJvwwUdWtxZp8rHdmmDmqXVn+39aCI+GVU9ev7ORL5AvfIo5G/hLaYca7d+8AtE= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1728066068; c=relaxed/simple; bh=n2o64wcB9RGbVFbvgQObSO2pzut7VrPHzQR3h9vkoNA=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=poNktPNujxHWQjeo/FAQuLkiMzP3QMSix/I1msICx3MADf7ZvRGZtgsegdid89GW3SpWQOviVgj9xR+UMzkx/aEli4KHo/u9f69L5IHngKksltX8Bu0Dpsoctpf4KG/fBAf0Hy4ImAAhHvO0zVtAJhn6pcGIj3jFoBz8Op6Ya9M= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WVI+D/g6; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WVI+D/g6" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 860CDC4CEC6; Fri, 4 Oct 2024 18:21:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1728066067; bh=n2o64wcB9RGbVFbvgQObSO2pzut7VrPHzQR3h9vkoNA=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=WVI+D/g6oCzp+QXxr1eTGgufhP+lnczoGLEk1TuAO3VScKgptbrqDGZRj2VrTRoTg 8lgZNeEapJZaCDRdS9haEpHzg6Wgg9ZflXdoLJJcdA+D7zHDwDswhlJM79Qag1Sriv NFOy7n4qihai2WaAZKpNWEhgOc94xxgCeS8+ZydgY4A4YWUJ5lYSkoVuC0jF8mVpCE rOgCWQCNUHpqTYkATRCEvhyQoNqgnwkK0TGIFwNU1g1R9L9W8VpZB0IF8rqJ74lQfK 9yPlMrw7XrkMyPip34nlX9LbDcC8D/jUdnE7eCTqbVFybE/bU3v6g2XTLWgzxQCmjL VfZusPmoADccA== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Andrey Shumilin , Helge Deller , Sasha Levin , tzimmermann@suse.de, fullwaywang@outlook.com, javierm@redhat.com, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH AUTOSEL 6.11 76/76] fbdev: sisfb: Fix strbuf array overflow Date: Fri, 4 Oct 2024 14:17:33 -0400 Message-ID: <20241004181828.3669209-76-sashal@kernel.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20241004181828.3669209-1-sashal@kernel.org> References: <20241004181828.3669209-1-sashal@kernel.org> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-stable-base: Linux 6.11.2 Content-Transfer-Encoding: 8bit From: Andrey Shumilin [ Upstream commit 9cf14f5a2746c19455ce9cb44341b5527b5e19c3 ] The values of the variables xres and yres are placed in strbuf. These variables are obtained from strbuf1. The strbuf1 array contains digit characters and a space if the array contains non-digit characters. Then, when executing sprintf(strbuf, "%ux%ux8", xres, yres); more than 16 bytes will be written to strbuf. It is suggested to increase the size of the strbuf array to 24. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Andrey Shumilin Signed-off-by: Helge Deller Signed-off-by: Sasha Levin --- drivers/video/fbdev/sis/sis_main.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/video/fbdev/sis/sis_main.c b/drivers/video/fbdev/sis/sis_main.c index 009bf1d926448..75033e6be15ab 100644 --- a/drivers/video/fbdev/sis/sis_main.c +++ b/drivers/video/fbdev/sis/sis_main.c @@ -183,7 +183,7 @@ static void sisfb_search_mode(char *name, bool quiet) { unsigned int j = 0, xres = 0, yres = 0, depth = 0, rate = 0; int i = 0; - char strbuf[16], strbuf1[20]; + char strbuf[24], strbuf1[20]; char *nameptr = name; /* We don't know the hardware specs yet and there is no ivideo */ -- 2.43.0