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 81264376A09; Wed, 30 Sep 2026 18:52:02 +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=1790794323; cv=none; b=Zxh4ZIFRooRUuNXAVjYLRPIj5LTwseBLMu0mEQcyydPHuITBPx+dUx2tZuA8xE6rzKStRvR+UkCBTg/dSLXqo4WgkfAoYTDnaQkUzP6HeuY0GQZjYVU3Sbfv8b9sbDeEAsBH/luJSOO5l/efF8jMNIY/lI6KZtkdYYFxJds78TQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790794323; c=relaxed/simple; bh=xmG40S206AGj9Gbqu6pzbZveFFWl4mpEGL9E+QXcBCs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=m8+c4i0mECNuFfOoLyptpEkTKBMuzdvglRgiqfZAENdfCbhOg/7Q7FhUXnVXmOyYukPxiTvTgiMPMDMErn95fJHZoM3oNVjeO2XDRF58KzYt6/Zu8tTh/vadvbb3Pbk3uvTKjsJjg8M6P3HVmfUB8VjgWDhmQMv0zbWRrM9UG1E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=fK7s5RxS; 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="fK7s5RxS" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 90DE01F000FF; Wed, 30 Sep 2026 18:52:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1790794322; bh=ygxn6pJMQj0xyHUahOgSZRw3d3/paJXhImASWqhno9Y=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=fK7s5RxSehgNGWdXadFPhseGVcfPqJzGb/imnuJq1MeJqlL7m3mG5/QSSbnXyJ8F+ piUuyEOBpt0/i5ss+s4DFB3kSS9+3yMFLfJJQQ6hWsnFbkSGWt9p1kk3LGJZ0F5wdl bZY2owk4QcCDF4aLsXViECGqOhbeFwuRKvEcKGc0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Asad Kamal , Yang Wang , Alex Deucher , Sasha Levin Subject: [PATCH 6.6 0170/1193] drm/amd/pm: bound pp_dpm_set_pp_table() memcpy Date: Wed, 30 Sep 2026 17:14:14 +0200 Message-ID: <20260930152437.969179371@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260930152434.301151190@linuxfoundation.org> References: <20260930152434.301151190@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Asad Kamal [ Upstream commit f193e71fa9fab2e68ef85201b106e8f580d3a25b ] The powerplay path allocates hardcode_pp_table once with kmemdup(..., soft_pp_table_size). memcpy(..., size) used the sysfs store count (up to PAGE_SIZE) with no upper bound, causing heap overflow. Reject writes where size exceeds soft_pp_table_size. Signed-off-by: Asad Kamal Reviewed-by: Yang Wang Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin --- drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c index 3a454aab62ce8..413d73c1577be 100644 --- a/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c +++ b/drivers/gpu/drm/amd/pm/powerplay/amd_powerplay.c @@ -680,6 +680,9 @@ static int pp_dpm_set_pp_table(void *handle, const char *buf, size_t size) if (!hwmgr || !hwmgr->pm_en) return -EINVAL; + if (size > hwmgr->soft_pp_table_size) + return -EINVAL; + if (!hwmgr->hardcode_pp_table) { hwmgr->hardcode_pp_table = kmemdup(hwmgr->soft_pp_table, hwmgr->soft_pp_table_size, -- 2.53.0