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 24FE026B2AA; Tue, 25 Mar 2025 12:37:29 +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=1742906249; cv=none; b=e/TGiW+NUKUcvd2BqzflB32OwcvyYo7Oko6bRYFsazWJEoSgOIr9QxSajXyFryosuuE32+YbBJF1FQA4nzNidCO0Scar+K3lQ9wIu/+XPNzvNULnvfVAPz0wgz0FKG9mslfdA91TVBF2O3jG0nGgDXUJn1YWSU9V7arloFXwViM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1742906249; c=relaxed/simple; bh=HOEh4NGdZ/HkWXfCJYUs+V2xbWN67cCB+ZtxO/xvak4=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=I3cY6JlVuRL03aQX6R1SczQ+ke5DKWHyls5EBmC3QPfasMgdDLNERAOOYYaRJNfKUqlvmRBu1yAIBIfmLNq/MR2e1tsI6AkY+1EiUQNzjJGlYlBxfMVqM2idTIv13fFtiIHc1sEIZRJYUq38PD0iWHn0gRlPdg9tlOZrv2CBrLQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=w+U8DYB5; 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="w+U8DYB5" Received: by smtp.kernel.org (Postfix) with ESMTPSA id CCD2FC4CEE4; Tue, 25 Mar 2025 12:37:28 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1742906249; bh=HOEh4NGdZ/HkWXfCJYUs+V2xbWN67cCB+ZtxO/xvak4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=w+U8DYB5soK6a/C2mdUWLO7PNVclgpUd0+D0qC9m8Jj7gnEPY/A5jdY0twj7hQg9r brqJYC9kcchuUOn9tL4mhDND9zK0Z+PbQZ0BMJsSR/zeAEIbM0ZwRIQAPCJ9X2TTG8 NPJBs+eq6teYk4SgDFRp9DzzLri9IQP/r1nz6W+I= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Qasim Ijaz , Patrisious Haddad , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.12 017/116] RDMA/mlx5: Handle errors returned from mlx5r_ib_rate() Date: Tue, 25 Mar 2025 08:21:44 -0400 Message-ID: <20250325122149.661753749@linuxfoundation.org> X-Mailer: git-send-email 2.49.0 In-Reply-To: <20250325122149.207086105@linuxfoundation.org> References: <20250325122149.207086105@linuxfoundation.org> User-Agent: quilt/0.68 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 6.12-stable review patch. If anyone has any objections, please let me know. ------------------ From: Qasim Ijaz [ Upstream commit 556f93b90c1872ad85e216e613c0b33803e621cb ] In function create_ib_ah() the following line attempts to left shift the return value of mlx5r_ib_rate() by 4 and store it in the stat_rate_sl member of av: However the code overlooks the fact that mlx5r_ib_rate() may return -EINVAL if the rate passed to it is less than IB_RATE_2_5_GBPS or greater than IB_RATE_800_GBPS. Because of this, the code may invoke undefined behaviour when shifting a signed negative value when doing "-EINVAL << 4". To fix this check for errors before assigning stat_rate_sl and propagate any error value to the callers. Fixes: c534ffda781f ("RDMA/mlx5: Fix AH static rate parsing") Signed-off-by: Qasim Ijaz Link: https://patch.msgid.link/20250304140246.205919-1-qasdev00@gmail.com Reviewed-by: Patrisious Haddad Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/mlx5/ah.c | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/ah.c b/drivers/infiniband/hw/mlx5/ah.c index 99036afb3aef0..531a57f9ee7e8 100644 --- a/drivers/infiniband/hw/mlx5/ah.c +++ b/drivers/infiniband/hw/mlx5/ah.c @@ -50,11 +50,12 @@ static __be16 mlx5_ah_get_udp_sport(const struct mlx5_ib_dev *dev, return sport; } -static void create_ib_ah(struct mlx5_ib_dev *dev, struct mlx5_ib_ah *ah, +static int create_ib_ah(struct mlx5_ib_dev *dev, struct mlx5_ib_ah *ah, struct rdma_ah_init_attr *init_attr) { struct rdma_ah_attr *ah_attr = init_attr->ah_attr; enum ib_gid_type gid_type; + int rate_val; if (rdma_ah_get_ah_flags(ah_attr) & IB_AH_GRH) { const struct ib_global_route *grh = rdma_ah_read_grh(ah_attr); @@ -67,8 +68,10 @@ static void create_ib_ah(struct mlx5_ib_dev *dev, struct mlx5_ib_ah *ah, ah->av.tclass = grh->traffic_class; } - ah->av.stat_rate_sl = - (mlx5r_ib_rate(dev, rdma_ah_get_static_rate(ah_attr)) << 4); + rate_val = mlx5r_ib_rate(dev, rdma_ah_get_static_rate(ah_attr)); + if (rate_val < 0) + return rate_val; + ah->av.stat_rate_sl = rate_val << 4; if (ah_attr->type == RDMA_AH_ATTR_TYPE_ROCE) { if (init_attr->xmit_slave) @@ -89,6 +92,8 @@ static void create_ib_ah(struct mlx5_ib_dev *dev, struct mlx5_ib_ah *ah, ah->av.fl_mlid = rdma_ah_get_path_bits(ah_attr) & 0x7f; ah->av.stat_rate_sl |= (rdma_ah_get_sl(ah_attr) & 0xf); } + + return 0; } int mlx5_ib_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr, @@ -121,8 +126,7 @@ int mlx5_ib_create_ah(struct ib_ah *ibah, struct rdma_ah_init_attr *init_attr, return err; } - create_ib_ah(dev, ah, init_attr); - return 0; + return create_ib_ah(dev, ah, init_attr); } int mlx5_ib_query_ah(struct ib_ah *ibah, struct rdma_ah_attr *ah_attr) -- 2.39.5