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 B0E762868AF; Tue, 12 Aug 2025 17:51:45 +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=1755021105; cv=none; b=uSSepG5pnFV/9ZQ2jYlp0piW7JOI/y478gZq7bgaMXZ+YehL/EmkGEHq36Oz2NYLWSGoi9iAyDTUAeBJEy+/P82mW6n3tbzDNn6s0nQHiO7E7AmkTEwyvnRU7KGlBtts+LTcrhbt5UTN/Xu5dWdNVwblLp5YlKTNOE0S5UhHvtw= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1755021105; c=relaxed/simple; bh=75idTpOlEDqhyYG2F7ggGHbE9OEw9kPqlPfEkBTduPI=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=F2j3q/9hYuWPbntyAUZ9RrHxAWVckNlMgKsR3nkiCxQ65fTpj2pZQMuNN6+GM6prQLYY81l6tIr2Se+SExYcnauE1pE+8+uSOGU51vUsSLcK2951eqnxCL2sK0UYXT2cLpS7bw44sssehgpFYl6HPhnBeo68bLUSTj+OdiJpiOU= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=sbENgoOJ; 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="sbENgoOJ" Received: by smtp.kernel.org (Postfix) with ESMTPSA id EAA66C4CEF0; Tue, 12 Aug 2025 17:51:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1755021105; bh=75idTpOlEDqhyYG2F7ggGHbE9OEw9kPqlPfEkBTduPI=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=sbENgoOJzMPuwnOBIidvt6Q3ba5usfQn3EK4n7RGwJtn9XySGNDE6XEMcibFfBA6P E7VF/WZwbdfMTY/8Ez3onc8HACuCinhvMzNrkI8YAIeOx46A/cyyt8eb8GTB8KIREY 4D67a3fZvyCvyCrzg1NieKS8FbWKAxLpqnnxsbEg= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Stav Aviram , Leon Romanovsky , Sasha Levin Subject: [PATCH 6.6 062/262] net/mlx5: Check device memory pointer before usage Date: Tue, 12 Aug 2025 19:27:30 +0200 Message-ID: <20250812172955.628686050@linuxfoundation.org> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20250812172952.959106058@linuxfoundation.org> References: <20250812172952.959106058@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 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Stav Aviram [ Upstream commit 70f238c902b8c0461ae6fbb8d1a0bbddc4350eea ] Add a NULL check before accessing device memory to prevent a crash if dev->dm allocation in mlx5_init_once() fails. Fixes: c9b9dcb430b3 ("net/mlx5: Move device memory management to mlx5_core") Signed-off-by: Stav Aviram Link: https://patch.msgid.link/c88711327f4d74d5cebc730dc629607e989ca187.1751370035.git.leon@kernel.org Signed-off-by: Leon Romanovsky Signed-off-by: Sasha Levin --- drivers/infiniband/hw/mlx5/dm.c | 2 +- drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c | 4 ++-- drivers/net/ethernet/mellanox/mlx5/core/main.c | 3 --- 3 files changed, 3 insertions(+), 6 deletions(-) diff --git a/drivers/infiniband/hw/mlx5/dm.c b/drivers/infiniband/hw/mlx5/dm.c index 3669c90b2dad..672e5cfd2fca 100644 --- a/drivers/infiniband/hw/mlx5/dm.c +++ b/drivers/infiniband/hw/mlx5/dm.c @@ -282,7 +282,7 @@ static struct ib_dm *handle_alloc_dm_memic(struct ib_ucontext *ctx, int err; u64 address; - if (!MLX5_CAP_DEV_MEM(dm_db->dev, memic)) + if (!dm_db || !MLX5_CAP_DEV_MEM(dm_db->dev, memic)) return ERR_PTR(-EOPNOTSUPP); dm = kzalloc(sizeof(*dm), GFP_KERNEL); diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c index 9482e51ac82a..bdbbfaf504d9 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/dm.c @@ -28,7 +28,7 @@ struct mlx5_dm *mlx5_dm_create(struct mlx5_core_dev *dev) dm = kzalloc(sizeof(*dm), GFP_KERNEL); if (!dm) - return ERR_PTR(-ENOMEM); + return NULL; spin_lock_init(&dm->lock); @@ -80,7 +80,7 @@ struct mlx5_dm *mlx5_dm_create(struct mlx5_core_dev *dev) err_steering: kfree(dm); - return ERR_PTR(-ENOMEM); + return NULL; } void mlx5_dm_cleanup(struct mlx5_core_dev *dev) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/main.c b/drivers/net/ethernet/mellanox/mlx5/core/main.c index 32fa789a6960..62a85f09b52f 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c @@ -1055,9 +1055,6 @@ static int mlx5_init_once(struct mlx5_core_dev *dev) } dev->dm = mlx5_dm_create(dev); - if (IS_ERR(dev->dm)) - mlx5_core_warn(dev, "Failed to init device memory %ld\n", PTR_ERR(dev->dm)); - dev->tracer = mlx5_fw_tracer_create(dev); dev->hv_vhca = mlx5_hv_vhca_create(dev); dev->rsc_dump = mlx5_rsc_dump_create(dev); -- 2.39.5