From patchwork Tue Nov 19 13:31:42 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Michal Luczaj X-Patchwork-Id: 844573 Received: from mailtransmit05.runbox.com (mailtransmit05.runbox.com [185.226.149.38]) (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 998001CCED8 for ; Tue, 19 Nov 2024 13:32:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=185.226.149.38 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732023140; cv=none; b=qOJJ444X/qS2XPgULfMWBUIXRlFsXFjti4OjC/0i41EoUt6P7o4nDRLjbqS3L7DYv27a2nYZPmPr2yET+Xom+ra1j6pnfrWoGCXM9pK5k1zcWZqSejWRxPQO7HFMi35quO5frgDCAJFqAJubiO6q8geRfgsG/xmXng/T7ME0dHo= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1732023140; c=relaxed/simple; bh=3FZhTixGFlKzETB2uD8Jt3rmw9+e9MKTuA5DdipdB30=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=c7yb3d1J9/m8bAXjHbCt9xFUST+E+Lr73PvRUS3dXJLFOMC1fdRC0bNdkyIIu4lKMNW5WrzK7dxCiQlNQIMGqs0CySQPGj6zZl/fSdgKGgaUHSgP1a2y156Ez2ytAtRoGarSvSAb2nKJrxz4ceT6hn7uxnteacUvp281HbP4TKI= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=rbox.co; spf=pass smtp.mailfrom=rbox.co; dkim=pass (2048-bit key) header.d=rbox.co header.i=@rbox.co header.b=Pl1qGRa/; arc=none smtp.client-ip=185.226.149.38 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=rbox.co Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=rbox.co Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=rbox.co header.i=@rbox.co header.b="Pl1qGRa/" Received: from mailtransmit02.runbox ([10.9.9.162] helo=aibo.runbox.com) by mailtransmit05.runbox.com with esmtps (TLS1.2) tls TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 (Exim 4.93) (envelope-from ) id 1tDOKx-0024Ru-6z; Tue, 19 Nov 2024 14:32:11 +0100 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=rbox.co; s=selector2; h=Cc:To:In-Reply-To:References:Message-Id: Content-Transfer-Encoding:Content-Type:MIME-Version:Subject:Date:From; bh=WwMNnwCXYhI10qw9jwJCWBCgMmUcanPFTj9yT0i2CI8=; b=Pl1qGRa/SAnTudIDkhpJBZm1xS Xk2gxNttPdLjN5eELjbJPMq4Z4lcTa9JN6y3y8u9BW3EMUmW/LQwVPS5Zibuglc0/cO2XMpLPw1Uk +4wBXxeY3LoY+DObhaHAyojorQkUVx9C98GBoZo6CYpQSVYYEDjNG76u88QBZhT2G9iAP/KAcwGRm s4S01uiw82BBIDnoAAWzjGD3NgTXPuxap0zC8QNHaFqXqDpRX2aO2kBkfuWVmiPmA6GdNCZT8Z2N1 qCkk6/Nd1k2ieSIOa0FFRVKvdiAaQ2VSuT4CQUqJ1f6+ZHF+YWSXr7XLb7c0WGyM3gg/mokXRCNWU DN0P/z5Q==; Received: from [10.9.9.72] (helo=submission01.runbox) by mailtransmit02.runbox with esmtp (Exim 4.86_2) (envelope-from ) id 1tDOKw-0006NG-Av; Tue, 19 Nov 2024 14:32:10 +0100 Received: by submission01.runbox with esmtpsa [Authenticated ID (604044)] (TLS1.2:ECDHE_SECP256R1__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.93) id 1tDOKl-000XIx-7d; Tue, 19 Nov 2024 14:31:59 +0100 From: Michal Luczaj Date: Tue, 19 Nov 2024 14:31:42 +0100 Subject: [PATCH net v3 3/4] rxrpc: Improve setsockopt() handling of malformed user input Precedence: bulk X-Mailing-List: linux-bluetooth@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241119-sockptr-copy-fixes-v3-3-d752cac4be8e@rbox.co> References: <20241119-sockptr-copy-fixes-v3-0-d752cac4be8e@rbox.co> In-Reply-To: <20241119-sockptr-copy-fixes-v3-0-d752cac4be8e@rbox.co> To: Marcel Holtmann , Johan Hedberg , Luiz Augusto von Dentz , "David S. Miller" , Eric Dumazet , Paolo Abeni , Simon Horman , David Howells , Marc Dionne Cc: Luiz Augusto von Dentz , linux-bluetooth@vger.kernel.org, netdev@vger.kernel.org, linux-afs@lists.infradead.org, Jakub Kicinski , Michal Luczaj X-Mailer: b4 0.14.2 copy_from_sockptr() does not return negative value on error; instead, it reports the number of bytes that failed to copy. Since it's deprecated, switch to copy_safe_from_sockptr(). Note: Keeping the `optlen != sizeof(unsigned int)` check as copy_safe_from_sockptr() by itself would also accept optlen > sizeof(unsigned int). Which would allow a more lenient handling of inputs. Fixes: 17926a79320a ("[AF_RXRPC]: Provide secure RxRPC sockets for use by userspace and kernel both") Signed-off-by: Michal Luczaj Acked-by: David Howells --- net/rxrpc/af_rxrpc.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/net/rxrpc/af_rxrpc.c b/net/rxrpc/af_rxrpc.c index f4844683e12039d636253cb06f622468593487eb..9d8bd0b37e41da9f99e2661ae4a29569f5eab650 100644 --- a/net/rxrpc/af_rxrpc.c +++ b/net/rxrpc/af_rxrpc.c @@ -707,9 +707,10 @@ static int rxrpc_setsockopt(struct socket *sock, int level, int optname, ret = -EISCONN; if (rx->sk.sk_state != RXRPC_UNBOUND) goto error; - ret = copy_from_sockptr(&min_sec_level, optval, - sizeof(unsigned int)); - if (ret < 0) + ret = copy_safe_from_sockptr(&min_sec_level, + sizeof(min_sec_level), + optval, optlen); + if (ret) goto error; ret = -EINVAL; if (min_sec_level > RXRPC_SECURITY_MAX)