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 D79CF30DD1E; Mon, 13 Oct 2025 14:56:10 +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=1760367370; cv=none; b=PlZTC4Tqp6VrE8xwqGv+W10raWQUSbWzyDZ8iHIna/qIGllHO6ABHtHWQa6jrCEjF+x/19IknHciqu+QQDwj1c7lA6/Qo8FmgLj0WcRLYde+iA+Pm9ZdlpCJEwTNcVw+nWQMMGZ+tMd80kscVyeOE7XBYATX1A8uXcqgjz4qgOI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1760367370; c=relaxed/simple; bh=maw307nq1PXyc7LvQmlZTdXZuEu4YqdRlMQEEH9Oyco=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=KVgL796h7RoH6pe9I0ijjkf4NfCtGQfMa4E2J4vuNvkjLzMPSyMHtnj+1wC/flmLZecbi1PYGXXLnb/ZC+1RncEqwZJcw7ddaEwOvSTv9KGRMgv61xrPqR53bkXRvWDcqYrSHAXIa1vSTVWUjnZc7djUcnFO0D1EI/0GjJRQWOQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=P6QKXjub; 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="P6QKXjub" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 5CBA1C4CEE7; Mon, 13 Oct 2025 14:56:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1760367370; bh=maw307nq1PXyc7LvQmlZTdXZuEu4YqdRlMQEEH9Oyco=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=P6QKXjubGpl9Ljql8QN2wkCP2Ri6Ua5kfL7dOxbTtYQw4Tzhk1lPw80V3cMDQstRg xrSOoGwvoaUTkgQKlchRJi0US27+6honwpXC8Yx/ULjecZ+38sD5Zjwrc4haoghsAl Txr/PqalS4Qw6n9T+TlqgZWs+P5qg0J3gvZPJ9bo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, stable@kernel.org, Ekansh Gupta , Ling Xu , Dmitry Baryshkov , Srinivas Kandagatla Subject: [PATCH 6.1 185/196] misc: fastrpc: fix possible map leak in fastrpc_put_args Date: Mon, 13 Oct 2025 16:45:58 +0200 Message-ID: <20251013144321.385730409@linuxfoundation.org> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251013144314.549284796@linuxfoundation.org> References: <20251013144314.549284796@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 6.1-stable review patch. If anyone has any objections, please let me know. ------------------ From: Ling Xu commit da1ba64176e0138f2bfa96f9e43e8c3640d01e1e upstream. copy_to_user() failure would cause an early return without cleaning up the fdlist, which has been updated by the DSP. This could lead to map leak. Fix this by redirecting to a cleanup path on failure, ensuring that all mapped buffers are properly released before returning. Fixes: c68cfb718c8f ("misc: fastrpc: Add support for context Invoke method") Cc: stable@kernel.org Co-developed-by: Ekansh Gupta Signed-off-by: Ekansh Gupta Signed-off-by: Ling Xu Reviewed-by: Dmitry Baryshkov Signed-off-by: Srinivas Kandagatla Link: https://lore.kernel.org/r/20250912131236.303102-4-srini@kernel.org Signed-off-by: Greg Kroah-Hartman --- drivers/misc/fastrpc.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) --- a/drivers/misc/fastrpc.c +++ b/drivers/misc/fastrpc.c @@ -1018,6 +1018,7 @@ static int fastrpc_put_args(struct fastr struct fastrpc_phy_page *pages; u64 *fdlist; int i, inbufs, outbufs, handles; + int ret = 0; inbufs = REMOTE_SCALARS_INBUFS(ctx->sc); outbufs = REMOTE_SCALARS_OUTBUFS(ctx->sc); @@ -1033,14 +1034,17 @@ static int fastrpc_put_args(struct fastr u64 len = rpra[i].buf.len; if (!kernel) { - if (copy_to_user((void __user *)dst, src, len)) - return -EFAULT; + if (copy_to_user((void __user *)dst, src, len)) { + ret = -EFAULT; + goto cleanup_fdlist; + } } else { memcpy(dst, src, len); } } } +cleanup_fdlist: /* Clean up fdlist which is updated by DSP */ for (i = 0; i < FASTRPC_MAX_FDLIST; i++) { if (!fdlist[i]) @@ -1049,7 +1053,7 @@ static int fastrpc_put_args(struct fastr fastrpc_map_put(mmap); } - return 0; + return ret; } static int fastrpc_invoke_send(struct fastrpc_session_ctx *sctx,