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 7BA701F37C0 for ; Tue, 11 Feb 2025 10:09:42 +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=1739268582; cv=none; b=Ce3FOMW2B+6+IeDeeF08ywkBQfyrGbFOT8Lf96oWc863BOqJC29gaw/fmzpcHRyMXsQuhAxQYCl34jL3jRslCjxqvTv7TFkbmSSD8RdC2z4/L0ElaqlHyz3JAIs611xuVu0tmXP6UkmNNprZ+Dq1ZkgsfRYnbGrp2aKQ8MJTJfs= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1739268582; c=relaxed/simple; bh=BBu7B5nH7iav87sRQX2zBDVAeGpoZhX9Ft9JOkcX7nY=; h=Subject:To:Cc:From:Date:Message-ID:MIME-Version:Content-Type; b=l3aog7njDaYs9ulkeyXNdcWQq0awLfHhu5YsiZLWeQn8IeGNvWzNZNwFEai89kZq7e7KvqB0cznGXa+BEW/n4XZJ9aylfwxqGdDj+/RdQjAAcjd9CrXIElrM+V/ZGCYpzkhZVzyXLm59hQ3l3b8kkkUDXv1tFtjjjUpD4H+pi6A= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=MeYtoRNC; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="MeYtoRNC" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D6CFCC4CEDD; Tue, 11 Feb 2025 10:09:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1739268582; bh=BBu7B5nH7iav87sRQX2zBDVAeGpoZhX9Ft9JOkcX7nY=; h=Subject:To:Cc:From:Date:From; b=MeYtoRNCqFAg8ilMChnVFkLG2Bjo8/PfeYT+8Z4Fs+D5irEVdVB+UPKVlrXQ+U5px 6iNBpSCK6hVGbdmeBeHL5HDIfZFxrT5wLPwS1lMGnooV3ueko+MqvSPsLrDF/+sKa7 xcixdUxI6TKzV5sPBE5mRPSkPd7DY/+CxAJxtzR8= Subject: FAILED: patch "[PATCH] misc: fastrpc: Fix copy buffer page size" failed to apply to 5.10-stable tree To: quic_ekangupt@quicinc.com,gregkh@linuxfoundation.org,srinivas.kandagatla@linaro.org Cc: From: Date: Tue, 11 Feb 2025 11:06:34 +0100 Message-ID: <2025021134-attendant-greedless-c5c8@gregkh> Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=ANSI_X3.4-1968 Content-Transfer-Encoding: 8bit The patch below does not apply to the 5.10-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to . To reproduce the conflict and resubmit, you may use the following commands: git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-5.10.y git checkout FETCH_HEAD git cherry-pick -x e966eae72762ecfdbdb82627e2cda48845b9dd66 # git commit -s git send-email --to '' --in-reply-to '2025021134-attendant-greedless-c5c8@gregkh' --subject-prefix 'PATCH 5.10.y' HEAD^.. Possible dependencies: thanks, greg k-h ------------------ original commit in Linus's tree ------------------ >From e966eae72762ecfdbdb82627e2cda48845b9dd66 Mon Sep 17 00:00:00 2001 From: Ekansh Gupta Date: Fri, 10 Jan 2025 13:42:39 +0000 Subject: [PATCH] misc: fastrpc: Fix copy buffer page size For non-registered buffer, fastrpc driver copies the buffer and pass it to the remote subsystem. There is a problem with current implementation of page size calculation which is not considering the offset in the calculation. This might lead to passing of improper and out-of-bounds page size which could result in memory issue. Calculate page start and page end using the offset adjusted address instead of absolute address. Fixes: 02b45b47fbe8 ("misc: fastrpc: fix remote page size calculation") Cc: stable@kernel.org Signed-off-by: Ekansh Gupta Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20250110134239.123603-4-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman diff --git a/drivers/misc/fastrpc.c b/drivers/misc/fastrpc.c index 56dc3b3a8940..7b7a22c91fe4 100644 --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -1019,8 +1019,8 @@ static int fastrpc_get_args(u32 kernel, struct fastrpc_invoke_ctx *ctx) (pkt_size - rlen); pages[i].addr = pages[i].addr & PAGE_MASK; - pg_start = (args & PAGE_MASK) >> PAGE_SHIFT; - pg_end = ((args + len - 1) & PAGE_MASK) >> PAGE_SHIFT; + pg_start = (rpra[i].buf.pv & PAGE_MASK) >> PAGE_SHIFT; + pg_end = ((rpra[i].buf.pv + len - 1) & PAGE_MASK) >> PAGE_SHIFT; pages[i].size = (pg_end - pg_start + 1) * PAGE_SIZE; args = args + mlen; rlen -= mlen;