From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 3EBA446C4D9; Tue, 21 Jul 2026 19:21:02 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784661663; cv=none; b=KUKJZPYHaRnqnfuMJe/WE23mIHhyjaYcOaR5jFPz/d+RaI8eZwwmME/fleaTLNQ26q0mH4dnazrFCbWT4Et5tv1Wa+cpW+RoC2JS6q9pn+a29kV+M45Q/cbN3FDFCFZ+/eySTU85+AT2PFB2UKmK/UxMh9OJabEFu1elTF8sqDw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784661663; c=relaxed/simple; bh=zec+TwJ85eMas7jEU5R6qhyqH7G9iNJjYqpdvExH8bs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=U4gR+7pcfypNAX6RBol1Ur/xHgmRHxP3R1Mxa37db4r1GT51AuN/zCfXUBX3dVJYXeo4Ey58MDtMIUEX2CxpTv12OzOOz4D96tWRtsEYFmubpdjgkZrejkYFDh1jK4BjsWxcuEgRYLD8pomwN+9PxM3pUUYQRM8ddAtenPiS5Zw= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=v7l3Wq03; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="v7l3Wq03" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 66E7A1F000E9; Tue, 21 Jul 2026 19:21:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784661661; bh=JsMHys/H+DZLHIiVBgojKlfkSTVenUs7Iw7ATIoecp4=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=v7l3Wq03OCa+KdZjphy8mHd5ww12NYLwakgHEz2p2wCWyFeDdOHLaLwCivFRnUBL4 j2hrUMED65aK3ugjQanAIf6KxkZFWxJrTq3tINScDh+cSyfUY4KqK/UgHnSgzya2dH 2EnTFQ8rRdVT4+PNqZJZek2AfaAXRPBLmulnhvKk= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Samuel Holland , Andrey Skvortsov , Chen-Yu Tsai , Jernej Skrabec , Sasha Levin Subject: [PATCH 6.12 0152/1276] bus: sunxi-rsb: Always check register address validity Date: Tue, 21 Jul 2026 17:09:55 +0200 Message-ID: <20260721152449.503249912@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152446.065700225@linuxfoundation.org> References: <20260721152446.065700225@linuxfoundation.org> User-Agent: quilt/0.69 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Samuel Holland [ Upstream commit 61192938a5870ac36edae81e4775b680dcf02c61 ] The register address was already validated for read operations in regmap_sunxi_rsb_reg_read before being truncated to a u8. Write operations have the same set of possible addresses, and the address is being truncated from u32 to u8 here as well, so the same check is needed. Signed-off-by: Samuel Holland Signed-off-by: Andrey Skvortsov Fixes: d787dcdb9c8f ("bus: sunxi-rsb: Add driver for Allwinner Reduced Serial Bus") Reviewed-by: Chen-Yu Tsai Reviewed-by: Jernej Skrabec Link: https://patch.msgid.link/20260301144939.1832806-1-andrej.skvortzov@gmail.com Signed-off-by: Chen-Yu Tsai Signed-off-by: Sasha Levin --- drivers/bus/sunxi-rsb.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/bus/sunxi-rsb.c b/drivers/bus/sunxi-rsb.c index a89d7892563767..7c9a113e133f3c 100644 --- a/drivers/bus/sunxi-rsb.c +++ b/drivers/bus/sunxi-rsb.c @@ -447,6 +447,9 @@ static int regmap_sunxi_rsb_reg_write(void *context, unsigned int reg, struct sunxi_rsb_ctx *ctx = context; struct sunxi_rsb_device *rdev = ctx->rdev; + if (reg > 0xff) + return -EINVAL; + return sunxi_rsb_write(rdev->rsb, rdev->rtaddr, reg, &val, ctx->size); } -- 2.53.0