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 4BA623EDE59; Tue, 12 May 2026 17:59:02 +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=1778608742; cv=none; b=bNxieYzOK61oKRVGb7dFCeoWDOzhxaAC1rM5jfR8Xok8FBrMmKx41USUtvbsU9d7Xw8Sq1Z3R9e68hdP1Sp0WSn56qLM97X3f/fet9Q4/DWIp5bU64G/b/nw9TSPp977h4O0V3AP6cGDXYV+ekXmUk76svEj1xuD8rxbsxuyUH8= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1778608742; c=relaxed/simple; bh=LoH7y5RhFiCCMZ91x7NvMe1ks31tzHrvqxxEgyz9aV0=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=uZ0Do7nL+LMj+RRj+J4zRNYNGeVlLhTEuz7lCrBVo+B8CnTP06fYNspl7MONwO/63E1RXOvHKZrG6w4yP7qyLuBA+2JU97gAs5Cfbch4BOZ0rSVrGetgQIDKtt7JEwK1T3WwtmlcwbBi6TafTKyFKEKbnIdJsAOV9eKV41SFzLU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=ZmFulghs; 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="ZmFulghs" Received: by smtp.kernel.org (Postfix) with ESMTPSA id D64C7C2BCB0; Tue, 12 May 2026 17:59:01 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1778608742; bh=LoH7y5RhFiCCMZ91x7NvMe1ks31tzHrvqxxEgyz9aV0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=ZmFulghscdQU5SRElakuqMYouZKMYOeIEt+zzpezFJgE77r3eUOPfgi20xIGdA8l1 Dmgag9Dk95yqU0k/7hPYuKSAlWHej49NU9j3YLaUnXrdd8VmgMp8yfNM/LTVMGURnw Fcvs33g/NU52p8/zEpQwQeROEXrNmuMJP9/nAWcI= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Long Li , Jason Gunthorpe Subject: [PATCH 6.18 196/270] RDMA/mana: Remove user triggerable WARN_ON() in mana_ib_create_qp_rss() Date: Tue, 12 May 2026 19:39:57 +0200 Message-ID: <20260512173942.575892062@linuxfoundation.org> X-Mailer: git-send-email 2.54.0 In-Reply-To: <20260512173938.452574370@linuxfoundation.org> References: <20260512173938.452574370@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 6.18-stable review patch. If anyone has any objections, please let me know. ------------------ From: Jason Gunthorpe commit 159f2efabc89d3f931d38f2d35876535d4abf0a3 upstream. Sashiko points out that the user can specify WQs sharing the same CQ as a part of the uAPI and this will trigger the WARN_ON() then go on to corrupt the kernel. Just reject it outright and fail the QP creation. Cc: stable@vger.kernel.org Fixes: c15d7802a424 ("RDMA/mana_ib: Add CQ interrupt support for RAW QP") Link: https://sashiko.dev/#/patchset/0-v2-1c49eeb88c48%2B91-rdma_udata_rep_jgg%40nvidia.com?part=1 Link: https://patch.msgid.link/r/5-v1-41f3135e5565+9d2-rdma_ai_fixes1_jgg@nvidia.com Reviewed-by: Long Li Signed-off-by: Jason Gunthorpe Signed-off-by: Greg Kroah-Hartman --- drivers/infiniband/hw/mana/cq.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) --- a/drivers/infiniband/hw/mana/cq.c +++ b/drivers/infiniband/hw/mana/cq.c @@ -144,8 +144,9 @@ int mana_ib_install_cq_cb(struct mana_ib if (cq->queue.id >= gc->max_num_cqs) return -EINVAL; - /* Create CQ table entry */ - WARN_ON(gc->cq_table[cq->queue.id]); + /* Create CQ table entry, sharing a CQ between WQs is not supported */ + if (gc->cq_table[cq->queue.id]) + return -EINVAL; if (cq->queue.kmem) gdma_cq = cq->queue.kmem; else