From: Saeed Mahameed <saeed@kernel.org>
To: "David S. Miller" <davem@davemloft.net>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Eric Dumazet <edumazet@google.com>
Cc: Saeed Mahameed <saeedm@nvidia.com>,
netdev@vger.kernel.org, Tariq Toukan <tariqt@nvidia.com>,
Eli Cohen <elic@nvidia.com>, Maor Dickman <maord@nvidia.com>
Subject: [net 12/12] net/mlx5: Lag, fix failure to cancel delayed bond work
Date: Wed, 28 Dec 2022 11:43:31 -0800 [thread overview]
Message-ID: <20221228194331.70419-13-saeed@kernel.org> (raw)
In-Reply-To: <20221228194331.70419-1-saeed@kernel.org>
From: Eli Cohen <elic@nvidia.com>
Commit 0d4e8ed139d8 ("net/mlx5: Lag, avoid lockdep warnings")
accidentally removed a call to cancel delayed bond work thus it may
cause queued delay to expire and fall on an already destroyed work
queue.
Fix by restoring the call cancel_delayed_work_sync() before
destroying the workqueue.
This prevents call trace such as this:
[ 329.230417] BUG: kernel NULL pointer dereference, address: 0000000000000000
[ 329.231444] #PF: supervisor write access in kernel mode
[ 329.232233] #PF: error_code(0x0002) - not-present page
[ 329.233007] PGD 0 P4D 0
[ 329.233476] Oops: 0002 [#1] SMP
[ 329.234012] CPU: 5 PID: 145 Comm: kworker/u20:4 Tainted: G OE 6.0.0-rc5_mlnx #1
[ 329.235282] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.13.0-0-gf21b5a4aeb02-prebuilt.qemu.org 04/01/2014
[ 329.236868] Workqueue: mlx5_cmd_0000:08:00.1 cmd_work_handler [mlx5_core]
[ 329.237886] RIP: 0010:_raw_spin_lock+0xc/0x20
[ 329.238585] Code: f0 0f b1 17 75 02 f3 c3 89 c6 e9 6f 3c 5f ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 0f 1f 44 00 00 31 c0 ba 01 00 00 00 <f0> 0f b1 17 75 02 f3 c3 89 c6 e9 45 3c 5f ff 0f 1f 44 00 00 0f 1f
[ 329.241156] RSP: 0018:ffffc900001b0e98 EFLAGS: 00010046
[ 329.241940] RAX: 0000000000000000 RBX: ffffffff82374ae0 RCX: 0000000000000000
[ 329.242954] RDX: 0000000000000001 RSI: 0000000000000014 RDI: 0000000000000000
[ 329.243974] RBP: ffff888106ccf000 R08: ffff8881004000c8 R09: ffff888100400000
[ 329.244990] R10: 0000000000000000 R11: ffffffff826669f8 R12: 0000000000002000
[ 329.246009] R13: 0000000000000005 R14: ffff888100aa7ce0 R15: ffff88852ca80000
[ 329.247030] FS: 0000000000000000(0000) GS:ffff88852ca80000(0000) knlGS:0000000000000000
[ 329.248260] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 329.249111] CR2: 0000000000000000 CR3: 000000016d675001 CR4: 0000000000770ee0
[ 329.250133] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 329.251152] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 329.252176] PKRU: 55555554
Fixes: 0d4e8ed139d8 ("net/mlx5: Lag, avoid lockdep warnings")
Signed-off-by: Eli Cohen <elic@nvidia.com>
Reviewed-by: Maor Dickman <maord@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
index 32c3e0a649a7..ad32b80e8501 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lag/lag.c
@@ -228,6 +228,7 @@ static void mlx5_ldev_free(struct kref *ref)
if (ldev->nb.notifier_call)
unregister_netdevice_notifier_net(&init_net, &ldev->nb);
mlx5_lag_mp_cleanup(ldev);
+ cancel_delayed_work_sync(&ldev->bond_work);
destroy_workqueue(ldev->wq);
mlx5_lag_mpesw_cleanup(ldev);
mutex_destroy(&ldev->lock);
--
2.38.1
prev parent reply other threads:[~2022-12-28 19:44 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-28 19:43 [pull request][net 00/12] mlx5 fixes 2022-12-28 Saeed Mahameed
2022-12-28 19:43 ` [net 01/12] net/mlx5: E-Switch, properly handle ingress tagged packets on VST Saeed Mahameed
2022-12-30 7:40 ` patchwork-bot+netdevbpf
2022-12-28 19:43 ` [net 02/12] net/mlx5: Add forgotten cleanup calls into mlx5_init_once() error path Saeed Mahameed
2022-12-28 19:43 ` [net 03/12] net/mlx5: Fix io_eq_size and event_eq_size params validation Saeed Mahameed
2022-12-28 19:43 ` [net 04/12] net/mlx5: Avoid recovery in probe flows Saeed Mahameed
2022-12-29 6:33 ` Leon Romanovsky
2022-12-29 18:29 ` Saeed Mahameed
2023-01-01 6:52 ` Leon Romanovsky
2022-12-28 19:43 ` [net 05/12] net/mlx5: Fix RoCE setting at HCA level Saeed Mahameed
2022-12-28 19:43 ` [net 06/12] net/mlx5e: IPoIB, Don't allow CQE compression to be turned on by default Saeed Mahameed
2022-12-28 19:43 ` [net 07/12] net/mlx5e: Fix RX reporter for XSK RQs Saeed Mahameed
2022-12-28 19:43 ` [net 08/12] net/mlx5e: CT: Fix ct debugfs folder name Saeed Mahameed
2022-12-28 19:43 ` [net 09/12] net/mlx5e: Always clear dest encap in neigh-update-del Saeed Mahameed
2022-12-28 19:43 ` [net 10/12] net/mlx5e: Fix hw mtu initializing at XDP SQ allocation Saeed Mahameed
2022-12-28 19:43 ` [net 11/12] net/mlx5e: Set geneve_tlv_option_0_exist when matching on geneve option Saeed Mahameed
2022-12-28 19:43 ` Saeed Mahameed [this message]
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