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[23.128.96.19]) by mx.google.com with ESMTPS id e2-20020a17090301c200b0015e8e1a32d6si12333052plh.603.2022.05.23.11.20.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 23 May 2022 11:20:58 -0700 (PDT) Received-SPF: softfail (google.com: domain of transitioning linux-kernel-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) client-ip=23.128.96.19; Authentication-Results: mx.google.com; dkim=pass header.i=@linuxfoundation.org header.s=korg header.b=rC23St0U; spf=softfail (google.com: domain of transitioning linux-kernel-owner@vger.kernel.org does not designate 23.128.96.19 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linuxfoundation.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by lindbergh.monkeyblade.net (Postfix) with ESMTP id B644217CE45; Mon, 23 May 2022 11:20:34 -0700 (PDT) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S244269AbiEWSQW (ORCPT + 99 others); Mon, 23 May 2022 14:16:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:34768 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S244661AbiEWR6L (ORCPT ); Mon, 23 May 2022 13:58:11 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AC6D094199; Mon, 23 May 2022 10:43:30 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 0276561226; Mon, 23 May 2022 17:30:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id DB45CC385A9; Mon, 23 May 2022 17:30:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1653327043; bh=rB9twHthhy+1I4CbI2xTfKeQ0WsyU8vWo13GNgf2yfo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=rC23St0U//sNC/pgtpxNFQ/EnDZv93q8Z8bdm/c4Jn530KNaJBHgPWhpVEpNaD1QQ ht59F3nRefnXEtttzexlP6xZXvLqAEEzBnrBEGg4T4PCpPoWKgyNzGT+bCyBfd9nMJ WiOXOQgQX82bbCO8Dev0t1ZapVkO1JzoveW/XmS0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Shay Drory , Mark Bloch , Saeed Mahameed , Sasha Levin Subject: [PATCH 5.17 103/158] net/mlx5: Initialize flow steering during driver probe Date: Mon, 23 May 2022 19:04:20 +0200 Message-Id: <20220523165848.361460752@linuxfoundation.org> X-Mailer: git-send-email 2.36.1 In-Reply-To: <20220523165830.581652127@linuxfoundation.org> References: <20220523165830.581652127@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,RDNS_NONE,SPF_HELO_NONE,T_SCC_BODY_TEXT_LINE autolearn=unavailable autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Shay Drory [ Upstream commit b33886971dbc4a86d1ec5369a2aaefc60a7cd72d ] Currently, software objects of flow steering are created and destroyed during reload flow. In case a device is unloaded, the following error is printed during grace period: mlx5_core 0000:00:0b.0: mlx5_fw_fatal_reporter_err_work:690:(pid 95): Driver is in error state. Unloading As a solution to fix use-after-free bugs, where we try to access these objects, when reading the value of flow_steering_mode devlink param[1], let's split flow steering creation and destruction into two routines: * init and cleanup: memory, cache, and pools allocation/free. * create and destroy: namespaces initialization and cleanup. While at it, re-order the cleanup function to mirror the init function. [1] Kasan trace: [ 385.119849 ] BUG: KASAN: use-after-free in mlx5_devlink_fs_mode_get+0x3b/0xa0 [ 385.119849 ] Read of size 4 at addr ffff888104b79308 by task bash/291 [ 385.119849 ] [ 385.119849 ] CPU: 1 PID: 291 Comm: bash Not tainted 5.17.0-rc1+ #2 [ 385.119849 ] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-2.fc32 04/01/2014 [ 385.119849 ] Call Trace: [ 385.119849 ] [ 385.119849 ] dump_stack_lvl+0x6e/0x91 [ 385.119849 ] print_address_description.constprop.0+0x1f/0x160 [ 385.119849 ] ? mlx5_devlink_fs_mode_get+0x3b/0xa0 [ 385.119849 ] ? mlx5_devlink_fs_mode_get+0x3b/0xa0 [ 385.119849 ] kasan_report.cold+0x83/0xdf [ 385.119849 ] ? devlink_param_notify+0x20/0x190 [ 385.119849 ] ? mlx5_devlink_fs_mode_get+0x3b/0xa0 [ 385.119849 ] mlx5_devlink_fs_mode_get+0x3b/0xa0 [ 385.119849 ] devlink_nl_param_fill+0x18a/0xa50 [ 385.119849 ] ? _raw_spin_lock_irqsave+0x8d/0xe0 [ 385.119849 ] ? devlink_flash_update_timeout_notify+0xf0/0xf0 [ 385.119849 ] ? __wake_up_common+0x4b/0x1e0 [ 385.119849 ] ? preempt_count_sub+0x14/0xc0 [ 385.119849 ] ? _raw_spin_unlock_irqrestore+0x28/0x40 [ 385.119849 ] ? __wake_up_common_lock+0xe3/0x140 [ 385.119849 ] ? __wake_up_common+0x1e0/0x1e0 [ 385.119849 ] ? __sanitizer_cov_trace_const_cmp8+0x27/0x80 [ 385.119849 ] ? __rcu_read_unlock+0x48/0x70 [ 385.119849 ] ? kasan_unpoison+0x23/0x50 [ 385.119849 ] ? __kasan_slab_alloc+0x2c/0x80 [ 385.119849 ] ? memset+0x20/0x40 [ 385.119849 ] ? __sanitizer_cov_trace_const_cmp4+0x25/0x80 [ 385.119849 ] devlink_param_notify+0xce/0x190 [ 385.119849 ] devlink_unregister+0x92/0x2b0 [ 385.119849 ] remove_one+0x41/0x140 [ 385.119849 ] pci_device_remove+0x68/0x140 [ 385.119849 ] ? pcibios_free_irq+0x10/0x10 [ 385.119849 ] __device_release_driver+0x294/0x3f0 [ 385.119849 ] device_driver_detach+0x82/0x130 [ 385.119849 ] unbind_store+0x193/0x1b0 [ 385.119849 ] ? subsys_interface_unregister+0x270/0x270 [ 385.119849 ] drv_attr_store+0x4e/0x70 [ 385.119849 ] ? drv_attr_show+0x60/0x60 [ 385.119849 ] sysfs_kf_write+0xa7/0xc0 [ 385.119849 ] kernfs_fop_write_iter+0x23a/0x2f0 [ 385.119849 ] ? sysfs_kf_bin_read+0x160/0x160 [ 385.119849 ] new_sync_write+0x311/0x430 [ 385.119849 ] ? new_sync_read+0x480/0x480 [ 385.119849 ] ? _raw_spin_lock+0x87/0xe0 [ 385.119849 ] ? __sanitizer_cov_trace_cmp4+0x25/0x80 [ 385.119849 ] ? security_file_permission+0x94/0xa0 [ 385.119849 ] vfs_write+0x4c7/0x590 [ 385.119849 ] ksys_write+0xf6/0x1e0 [ 385.119849 ] ? __x64_sys_read+0x50/0x50 [ 385.119849 ] ? fpregs_assert_state_consistent+0x99/0xa0 [ 385.119849 ] do_syscall_64+0x3d/0x90 [ 385.119849 ] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 385.119849 ] RIP: 0033:0x7fc36ef38504 [ 385.119849 ] Code: 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb b3 0f 1f 80 00 00 00 00 48 8d 05 f9 61 0d 00 8b 00 85 c0 75 13 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 54 c3 0f 1f 00 41 54 49 89 d4 55 48 89 f5 53 [ 385.119849 ] RSP: 002b:00007ffde0ff3d08 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 [ 385.119849 ] RAX: ffffffffffffffda RBX: 000000000000000c RCX: 00007fc36ef38504 [ 385.119849 ] RDX: 000000000000000c RSI: 00007fc370521040 RDI: 0000000000000001 [ 385.119849 ] RBP: 00007fc370521040 R08: 00007fc36f00b8c0 R09: 00007fc36ee4b740 [ 385.119849 ] R10: 0000000000000000 R11: 0000000000000246 R12: 00007fc36f00a760 [ 385.119849 ] R13: 000000000000000c R14: 00007fc36f005760 R15: 000000000000000c [ 385.119849 ] [ 385.119849 ] [ 385.119849 ] Allocated by task 65: [ 385.119849 ] kasan_save_stack+0x1e/0x40 [ 385.119849 ] __kasan_kmalloc+0x81/0xa0 [ 385.119849 ] mlx5_init_fs+0x11b/0x1160 [ 385.119849 ] mlx5_load+0x13c/0x220 [ 385.119849 ] mlx5_load_one+0xda/0x160 [ 385.119849 ] mlx5_recover_device+0xb8/0x100 [ 385.119849 ] mlx5_health_try_recover+0x2f9/0x3a1 [ 385.119849 ] devlink_health_reporter_recover+0x75/0x100 [ 385.119849 ] devlink_health_report+0x26c/0x4b0 [ 385.275909 ] mlx5_fw_fatal_reporter_err_work+0x11e/0x1b0 [ 385.275909 ] process_one_work+0x520/0x970 [ 385.275909 ] worker_thread+0x378/0x950 [ 385.275909 ] kthread+0x1bb/0x200 [ 385.275909 ] ret_from_fork+0x1f/0x30 [ 385.275909 ] [ 385.275909 ] Freed by task 65: [ 385.275909 ] kasan_save_stack+0x1e/0x40 [ 385.275909 ] kasan_set_track+0x21/0x30 [ 385.275909 ] kasan_set_free_info+0x20/0x30 [ 385.275909 ] __kasan_slab_free+0xfc/0x140 [ 385.275909 ] kfree+0xa5/0x3b0 [ 385.275909 ] mlx5_unload+0x2e/0xb0 [ 385.275909 ] mlx5_unload_one+0x86/0xb0 [ 385.275909 ] mlx5_fw_fatal_reporter_err_work.cold+0xca/0xcf [ 385.275909 ] process_one_work+0x520/0x970 [ 385.275909 ] worker_thread+0x378/0x950 [ 385.275909 ] kthread+0x1bb/0x200 [ 385.275909 ] ret_from_fork+0x1f/0x30 [ 385.275909 ] [ 385.275909 ] The buggy address belongs to the object at ffff888104b79300 [ 385.275909 ] which belongs to the cache kmalloc-128 of size 128 [ 385.275909 ] The buggy address is located 8 bytes inside of [ 385.275909 ] 128-byte region [ffff888104b79300, ffff888104b79380) [ 385.275909 ] The buggy address belongs to the page: [ 385.275909 ] page:00000000de44dd39 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x104b78 [ 385.275909 ] head:00000000de44dd39 order:1 compound_mapcount:0 [ 385.275909 ] flags: 0x8000000000010200(slab|head|zone=2) [ 385.275909 ] raw: 8000000000010200 0000000000000000 dead000000000122 ffff8881000428c0 [ 385.275909 ] raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000 [ 385.275909 ] page dumped because: kasan: bad access detected [ 385.275909 ] [ 385.275909 ] Memory state around the buggy address: [ 385.275909 ] ffff888104b79200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 385.275909 ] ffff888104b79280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 385.275909 ] >ffff888104b79300: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 385.275909 ] ^ [ 385.275909 ] ffff888104b79380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 385.275909 ] ffff888104b79400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 385.275909 ]] Fixes: e890acd5ff18 ("net/mlx5: Add devlink flow_steering_mode parameter") Signed-off-by: Shay Drory Reviewed-by: Mark Bloch Signed-off-by: Saeed Mahameed Signed-off-by: Sasha Levin --- .../net/ethernet/mellanox/mlx5/core/fs_core.c | 131 ++++++++++-------- .../net/ethernet/mellanox/mlx5/core/fs_core.h | 6 +- .../net/ethernet/mellanox/mlx5/core/main.c | 15 +- 3 files changed, 91 insertions(+), 61 deletions(-) diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c index 537c82b9aa53..b6f58d16d145 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.c @@ -2656,28 +2656,6 @@ static void cleanup_root_ns(struct mlx5_flow_root_namespace *root_ns) clean_tree(&root_ns->ns.node); } -void mlx5_cleanup_fs(struct mlx5_core_dev *dev) -{ - struct mlx5_flow_steering *steering = dev->priv.steering; - - cleanup_root_ns(steering->root_ns); - cleanup_root_ns(steering->fdb_root_ns); - steering->fdb_root_ns = NULL; - kfree(steering->fdb_sub_ns); - steering->fdb_sub_ns = NULL; - cleanup_root_ns(steering->port_sel_root_ns); - cleanup_root_ns(steering->sniffer_rx_root_ns); - cleanup_root_ns(steering->sniffer_tx_root_ns); - cleanup_root_ns(steering->rdma_rx_root_ns); - cleanup_root_ns(steering->rdma_tx_root_ns); - cleanup_root_ns(steering->egress_root_ns); - mlx5_cleanup_fc_stats(dev); - kmem_cache_destroy(steering->ftes_cache); - kmem_cache_destroy(steering->fgs_cache); - mlx5_ft_pool_destroy(dev); - kfree(steering); -} - static int init_sniffer_tx_root_ns(struct mlx5_flow_steering *steering) { struct fs_prio *prio; @@ -3063,42 +3041,27 @@ static int init_egress_root_ns(struct mlx5_flow_steering *steering) return err; } -int mlx5_init_fs(struct mlx5_core_dev *dev) +void mlx5_fs_core_cleanup(struct mlx5_core_dev *dev) { - struct mlx5_flow_steering *steering; - int err = 0; - - err = mlx5_init_fc_stats(dev); - if (err) - return err; - - err = mlx5_ft_pool_init(dev); - if (err) - return err; - - steering = kzalloc(sizeof(*steering), GFP_KERNEL); - if (!steering) { - err = -ENOMEM; - goto err; - } - - steering->dev = dev; - dev->priv.steering = steering; + struct mlx5_flow_steering *steering = dev->priv.steering; - if (mlx5_fs_dr_is_supported(dev)) - steering->mode = MLX5_FLOW_STEERING_MODE_SMFS; - else - steering->mode = MLX5_FLOW_STEERING_MODE_DMFS; + cleanup_root_ns(steering->root_ns); + cleanup_root_ns(steering->fdb_root_ns); + steering->fdb_root_ns = NULL; + kfree(steering->fdb_sub_ns); + steering->fdb_sub_ns = NULL; + cleanup_root_ns(steering->port_sel_root_ns); + cleanup_root_ns(steering->sniffer_rx_root_ns); + cleanup_root_ns(steering->sniffer_tx_root_ns); + cleanup_root_ns(steering->rdma_rx_root_ns); + cleanup_root_ns(steering->rdma_tx_root_ns); + cleanup_root_ns(steering->egress_root_ns); +} - steering->fgs_cache = kmem_cache_create("mlx5_fs_fgs", - sizeof(struct mlx5_flow_group), 0, - 0, NULL); - steering->ftes_cache = kmem_cache_create("mlx5_fs_ftes", sizeof(struct fs_fte), 0, - 0, NULL); - if (!steering->ftes_cache || !steering->fgs_cache) { - err = -ENOMEM; - goto err; - } +int mlx5_fs_core_init(struct mlx5_core_dev *dev) +{ + struct mlx5_flow_steering *steering = dev->priv.steering; + int err = 0; if ((((MLX5_CAP_GEN(dev, port_type) == MLX5_CAP_PORT_TYPE_ETH) && (MLX5_CAP_GEN(dev, nic_flow_table))) || @@ -3157,8 +3120,64 @@ int mlx5_init_fs(struct mlx5_core_dev *dev) } return 0; + +err: + mlx5_fs_core_cleanup(dev); + return err; +} + +void mlx5_fs_core_free(struct mlx5_core_dev *dev) +{ + struct mlx5_flow_steering *steering = dev->priv.steering; + + kmem_cache_destroy(steering->ftes_cache); + kmem_cache_destroy(steering->fgs_cache); + kfree(steering); + mlx5_ft_pool_destroy(dev); + mlx5_cleanup_fc_stats(dev); +} + +int mlx5_fs_core_alloc(struct mlx5_core_dev *dev) +{ + struct mlx5_flow_steering *steering; + int err = 0; + + err = mlx5_init_fc_stats(dev); + if (err) + return err; + + err = mlx5_ft_pool_init(dev); + if (err) + goto err; + + steering = kzalloc(sizeof(*steering), GFP_KERNEL); + if (!steering) { + err = -ENOMEM; + goto err; + } + + steering->dev = dev; + dev->priv.steering = steering; + + if (mlx5_fs_dr_is_supported(dev)) + steering->mode = MLX5_FLOW_STEERING_MODE_SMFS; + else + steering->mode = MLX5_FLOW_STEERING_MODE_DMFS; + + steering->fgs_cache = kmem_cache_create("mlx5_fs_fgs", + sizeof(struct mlx5_flow_group), 0, + 0, NULL); + steering->ftes_cache = kmem_cache_create("mlx5_fs_ftes", sizeof(struct fs_fte), 0, + 0, NULL); + if (!steering->ftes_cache || !steering->fgs_cache) { + err = -ENOMEM; + goto err; + } + + return 0; + err: - mlx5_cleanup_fs(dev); + mlx5_fs_core_free(dev); return err; } diff --git a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h index 5469b08d635f..6366bf50a564 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h +++ b/drivers/net/ethernet/mellanox/mlx5/core/fs_core.h @@ -293,8 +293,10 @@ int mlx5_flow_namespace_set_peer(struct mlx5_flow_root_namespace *ns, int mlx5_flow_namespace_set_mode(struct mlx5_flow_namespace *ns, enum mlx5_flow_steering_mode mode); -int mlx5_init_fs(struct mlx5_core_dev *dev); -void mlx5_cleanup_fs(struct mlx5_core_dev *dev); +int mlx5_fs_core_alloc(struct mlx5_core_dev *dev); +void mlx5_fs_core_free(struct mlx5_core_dev *dev); +int mlx5_fs_core_init(struct mlx5_core_dev *dev); +void mlx5_fs_core_cleanup(struct mlx5_core_dev *dev); int mlx5_fs_egress_acls_init(struct mlx5_core_dev *dev, int total_vports); void mlx5_fs_egress_acls_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 bba72b220cc3..f1437b6d4418 100644 --- a/drivers/net/ethernet/mellanox/mlx5/core/main.c +++ b/drivers/net/ethernet/mellanox/mlx5/core/main.c @@ -939,6 +939,12 @@ static int mlx5_init_once(struct mlx5_core_dev *dev) goto err_sf_table_cleanup; } + err = mlx5_fs_core_alloc(dev); + if (err) { + mlx5_core_err(dev, "Failed to alloc flow steering\n"); + goto err_fs; + } + dev->dm = mlx5_dm_create(dev); if (IS_ERR(dev->dm)) mlx5_core_warn(dev, "Failed to init device memory%d\n", err); @@ -949,6 +955,8 @@ static int mlx5_init_once(struct mlx5_core_dev *dev) return 0; +err_fs: + mlx5_sf_table_cleanup(dev); err_sf_table_cleanup: mlx5_sf_hw_table_cleanup(dev); err_sf_hw_table_cleanup: @@ -986,6 +994,7 @@ static void mlx5_cleanup_once(struct mlx5_core_dev *dev) mlx5_hv_vhca_destroy(dev->hv_vhca); mlx5_fw_tracer_destroy(dev->tracer); mlx5_dm_cleanup(dev); + mlx5_fs_core_free(dev); mlx5_sf_table_cleanup(dev); mlx5_sf_hw_table_cleanup(dev); mlx5_vhca_event_cleanup(dev); @@ -1192,7 +1201,7 @@ static int mlx5_load(struct mlx5_core_dev *dev) goto err_tls_start; } - err = mlx5_init_fs(dev); + err = mlx5_fs_core_init(dev); if (err) { mlx5_core_err(dev, "Failed to init flow steering\n"); goto err_fs; @@ -1237,7 +1246,7 @@ static int mlx5_load(struct mlx5_core_dev *dev) err_vhca: mlx5_vhca_event_stop(dev); err_set_hca: - mlx5_cleanup_fs(dev); + mlx5_fs_core_cleanup(dev); err_fs: mlx5_accel_tls_cleanup(dev); err_tls_start: @@ -1266,7 +1275,7 @@ static void mlx5_unload(struct mlx5_core_dev *dev) mlx5_ec_cleanup(dev); mlx5_sf_hw_table_destroy(dev); mlx5_vhca_event_stop(dev); - mlx5_cleanup_fs(dev); + mlx5_fs_core_cleanup(dev); mlx5_accel_ipsec_cleanup(dev); mlx5_accel_tls_cleanup(dev); mlx5_fpga_device_stop(dev); -- 2.35.1