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 2BDC337EFFE; Wed, 30 Sep 2026 18:10:54 +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=1790791855; cv=none; b=mu/1/1O64N0sNtzrkzIpKr2zrvidUtqHpJEVrQpTOlqVZetE6dSgHk/LM+GwMTZ5yTCBiR97M1+6W3uOT9VtLLXcPmGadPM2JC4Er1d9+KPYmjnl7IC2ucVQdkNWpjkx39fdtRPjFPXCnmev8/UXpfqFnytuFo+el7izIw/QLFA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790791855; c=relaxed/simple; bh=w42v+Bl9YtV1dPnDEPgjQDaWt5yIiM+MaaIZilA7TGU=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=cgQ47pdSdUuUgno3H2G+I7hw2ZZLdJLFHH19VWVtrbuja3Lto0JqlM2AdfFULYRl9iu06J/VPAxCVeRQCnTr1RbF3y7lKN+OoF3Zl96MCviC18BEERTdt16TWczFVs9xvz3R7eBDwdAD9b2s9vb3+jWcvOIhS+J2V82WpRt/q5s= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=bm9JUbDo; 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="bm9JUbDo" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 88D731F000FF; Wed, 30 Sep 2026 18:10:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790791854; bh=D4qA0sjPX34zB2JimInrT+JDnQB00AgYjekLoMx1xD8=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=bm9JUbDoif7kvMDJTNx/JN0TBBQMF2RrH0+baSiPFL6iCVm7pzcOMTn+IaOX8eBN2 EoeKoNVrDhnkw8lRHiLtG20Xdzj9yI3w3lOKOIa21rGFOa8RgRHMgU4oiwFKX4/15c oSVADdhGGQhFmiftWpFiC2iO72BUYILxstXqsDF8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Xixin Liu , Sudeep Holla , Sasha Levin Subject: [PATCH 5.15 448/752] firmware: arm_scpi: reject DVFS OPP count above MAX_DVFS_OPPS Date: Wed, 30 Sep 2026 17:25:18 +0200 Message-ID: <20260930152407.973729209@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152358.131179731@linuxfoundation.org> References: <20260930152358.131179731@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 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Xixin Liu [ Upstream commit 32471d84a487c7fd74532bc96be56f8028cf4a3f ] scpi_dvfs_get_info() already rejected a zero opp_count, but still trusted any larger value from the SCP firmware. The shared-memory reply only holds MAX_DVFS_OPPS entries in buf.opps[]; a bigger count over-reads that array and then sizes the allocated OPP table incorrectly (garbage OPPs / OOB). The missing upper bound dates back to the original SCPI DVFS support. Reject zero and out-of-range counts in one check and return -EINVAL. Fixes: 8cb7cf56c9fe ("firmware: add support for ARM System Control and Power Interface(SCPI) protocol") Signed-off-by: Xixin Liu Link: https://patch.msgid.link/022802f0b38f.v2.1785200642.git.liuxixin@kylinos.cn Signed-off-by: Sudeep Holla Signed-off-by: Sasha Levin --- drivers/firmware/arm_scpi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/firmware/arm_scpi.c b/drivers/firmware/arm_scpi.c index 2d85e783ae267..aa27eb5278520 100644 --- a/drivers/firmware/arm_scpi.c +++ b/drivers/firmware/arm_scpi.c @@ -628,8 +628,8 @@ static struct scpi_dvfs_info *scpi_dvfs_get_info(u8 domain) if (ret) return ERR_PTR(ret); - if (!buf.opp_count) - return ERR_PTR(-ENOENT); + if (!buf.opp_count || buf.opp_count > MAX_DVFS_OPPS) + return ERR_PTR(-EINVAL); info = kmalloc(sizeof(*info), GFP_KERNEL); if (!info) -- 2.53.0