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 63CC8168AD for ; Mon, 8 May 2023 11:23:00 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DE5BCC4339C; Mon, 8 May 2023 11:22:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1683544980; bh=4cQcO5UEZkiOOZqO+3d0d8wH3ika8tD7lRqaGBM6ous=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=VJoFcB1wybp288i5GPqKbk2wvJJfplYXx/YoyV1Q8fnII7LNkICGdQM6EGvFAxVgV lSNLH1SU1qQPMkJVg2f8QME/jIPnp+elleUYMEA8MxMNzUH+/7NCVA6+HQBhC+jyQQ 9g5DP4f1tmpDX5rpa5e4p8mh1q463VAm7XjgM7Nw= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Dan Carpenter , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.3 586/694] RDMA/mlx4: Prevent shift wrapping in set_user_sq_size() Date: Mon, 8 May 2023 11:47:01 +0200 Message-Id: <20230508094454.061259655@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230508094432.603705160@linuxfoundation.org> References: <20230508094432.603705160@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Dan Carpenter [ Upstream commit d50b3c73f1ac20dabc53dc6e9d64ce9c79a331eb ] The ucmd->log_sq_bb_count variable is controlled by the user so this shift can wrap. Fix it by using check_shl_overflow() in the same way that it was done in commit 515f60004ed9 ("RDMA/hns: Prevent undefined behavior in hns_roce_set_user_sq_size()"). Fixes: 839041329fd3 ("IB/mlx4: Sanity check userspace send queue sizes") Signed-off-by: Dan Carpenter Link: https://lore.kernel.org/r/a8dfbd1d-c019-4556-930b-bab1ded73b10@kili.mountain Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/mlx4/qp.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) diff --git a/drivers/infiniband/hw/mlx4/qp.c b/drivers/infiniband/hw/mlx4/qp.c index 884825b2e5f77..456656617c33f 100644 --- a/drivers/infiniband/hw/mlx4/qp.c +++ b/drivers/infiniband/hw/mlx4/qp.c @@ -447,9 +447,13 @@ static int set_user_sq_size(struct mlx4_ib_dev *dev, struct mlx4_ib_qp *qp, struct mlx4_ib_create_qp *ucmd) { + u32 cnt; + /* Sanity check SQ size before proceeding */ - if ((1 << ucmd->log_sq_bb_count) > dev->dev->caps.max_wqes || - ucmd->log_sq_stride > + if (check_shl_overflow(1, ucmd->log_sq_bb_count, &cnt) || + cnt > dev->dev->caps.max_wqes) + return -EINVAL; + if (ucmd->log_sq_stride > ilog2(roundup_pow_of_two(dev->dev->caps.max_sq_desc_sz)) || ucmd->log_sq_stride < MLX4_IB_MIN_SQ_STRIDE) return -EINVAL; -- 2.39.2