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 2F79346D0A0; Tue, 21 Jul 2026 20:28:38 +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=1784665720; cv=none; b=s9GY3BhnSWBHioq5AGSz3mkLDo1AXb6PW3HFA4ejciyXIV9VkiLqZU6LOvQ3kbeXiK2ozRvPvwwDnSw6CQT7sJtD60+ODRukH5ysU3IXgZKaRbCVgaGWJUBbYZ9aqZD0ZCW9fCHc860s7Z3mj6CE8VA/bOY53h4PSLiElhznz6E= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784665720; c=relaxed/simple; bh=5gPCJk6KJKUl2Y4WZUR+rfmvc0h7zAmxOZnXtypIQao=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=O4rJJKxYu5o9jSuiUSHofJejMsw+kP68dnb8fECTJ3SwAkYBFHqNb/8SPMxBrOWrY9ghwqbLbEkv316JQ6N8Tpn3tuLbJXnZc92z7dW2I/Qj1Zqe8iT5UxLW9XfuURwDvc0cIRXX0+G524AEWmvL5MNl0CVRaZRfvc55QgO4tl4= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=sUc+ajVt; 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="sUc+ajVt" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 57A711F000E9; Tue, 21 Jul 2026 20:28:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linuxfoundation.org; s=korg; t=1784665718; bh=o5TSXTcjzK1vb0RQLOKz+T78R0bmEOuI6vOgKYN1Bok=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=sUc+ajVtyanmcmTYe4H+k/ijG+dwl71+KZCLMo5RJCbW2h8QF9tQyUI86ASeksT9m K0UiPBoroOIMEJgU8Jk2IYHdorSI+nMn9AxTmB9rLZJo8ic/NumaLMYv95mzG5B1fx L9IZ8/GNg1CP6RiZLMBcdTLHe91WCi7Qv99dPie8= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Alexander Chesnokov , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.6 0408/1266] RDMA/hns: Fix arithmetic overflow in calc_hem_config() Date: Tue, 21 Jul 2026 17:14:05 +0200 Message-ID: <20260721152450.968094812@linuxfoundation.org> X-Mailer: git-send-email 2.55.0 In-Reply-To: <20260721152441.786066624@linuxfoundation.org> References: <20260721152441.786066624@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: Alexander Chesnokov [ Upstream commit a38e4410af9ad8b7ad2217254da06cd4dc21f0ed ] If bt_num is 3 or 2, then the expressions like l0_idx * chunk_ba_num + l1_idx are computed in 32-bit arithmetic before being assigned to a u64 index field, which can lead to overflow. Cast the first operand to u64 to ensure the arithmetic is performed in 64-bit. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: 2f49de21f3e9 ("RDMA/hns: Optimize mhop get flow for multi-hop addressing") Signed-off-by: Alexander Chesnokov Link: https://patch.msgid.link/20260413091527.39990-1-Alexander.Chesnokov@kaspersky.com Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/hns/hns_roce_hem.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/infiniband/hw/hns/hns_roce_hem.c b/drivers/infiniband/hw/hns/hns_roce_hem.c index f13016dc8016a5..d6fcb1a4bd4fca 100644 --- a/drivers/infiniband/hw/hns/hns_roce_hem.c +++ b/drivers/infiniband/hw/hns/hns_roce_hem.c @@ -355,14 +355,14 @@ static int calc_hem_config(struct hns_roce_dev *hr_dev, bt_num = hns_roce_get_bt_num(table->type, mhop->hop_num); switch (bt_num) { case 3: - index->l1 = l0_idx * chunk_ba_num + l1_idx; + index->l1 = (u64)l0_idx * chunk_ba_num + l1_idx; index->l0 = l0_idx; - index->buf = l0_idx * chunk_ba_num * chunk_ba_num + - l1_idx * chunk_ba_num + l2_idx; + index->buf = (u64)l0_idx * chunk_ba_num * chunk_ba_num + + (u64)l1_idx * chunk_ba_num + l2_idx; break; case 2: index->l0 = l0_idx; - index->buf = l0_idx * chunk_ba_num + l1_idx; + index->buf = (u64)l0_idx * chunk_ba_num + l1_idx; break; case 1: index->buf = l0_idx; -- 2.53.0