From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Moshe Shemesh <moshe@mellanox.com>,
Eran Ben Elisha <eranbe@mellanox.com>,
Saeed Mahameed <saeedm@mellanox.com>,
Sasha Levin <sashal@kernel.org>,
netdev@vger.kernel.org, linux-rdma@vger.kernel.org
Subject: [PATCH AUTOSEL 4.9 13/27] net/mlx5: Fix forced completion access non initialized command entry
Date: Thu, 14 May 2020 14:55:36 -0400 [thread overview]
Message-ID: <20200514185550.21462-13-sashal@kernel.org> (raw)
In-Reply-To: <20200514185550.21462-1-sashal@kernel.org>
From: Moshe Shemesh <moshe@mellanox.com>
[ Upstream commit f3cb3cebe26ed4c8036adbd9448b372129d3c371 ]
mlx5_cmd_flush() will trigger forced completions to all valid command
entries. Triggered by an asynch event such as fast teardown it can
happen at any stage of the command, including command initialization.
It will trigger forced completion and that can lead to completion on an
uninitialized command entry.
Setting MLX5_CMD_ENT_STATE_PENDING_COMP only after command entry is
initialized will ensure force completion is treated only if command
entry is initialized.
Fixes: 73dd3a4839c1 ("net/mlx5: Avoid using pending command interface slots")
Signed-off-by: Moshe Shemesh <moshe@mellanox.com>
Signed-off-by: Eran Ben Elisha <eranbe@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/mellanox/mlx5/core/cmd.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
index 1d5263c46eee0..a1057efa2294e 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/cmd.c
@@ -813,7 +813,6 @@ static void cmd_work_handler(struct work_struct *work)
}
cmd->ent_arr[ent->idx] = ent;
- set_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, &ent->state);
lay = get_inst(cmd, ent->idx);
ent->lay = lay;
memset(lay, 0, sizeof(*lay));
@@ -835,6 +834,7 @@ static void cmd_work_handler(struct work_struct *work)
if (ent->callback)
schedule_delayed_work(&ent->cb_timeout_work, cb_timeout);
+ set_bit(MLX5_CMD_ENT_STATE_PENDING_COMP, &ent->state);
/* Skip sending command to fw if internal error */
if (pci_channel_offline(dev->pdev) ||
--
2.20.1
next parent reply other threads:[~2020-05-14 18:59 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200514185550.21462-1-sashal@kernel.org>
2020-05-14 18:55 ` Sasha Levin [this message]
2020-05-14 18:55 ` [PATCH AUTOSEL 4.9 14/27] net/mlx5: Fix command entry leak in Internal Error State Sasha Levin
2020-05-14 18:55 ` [PATCH AUTOSEL 4.9 23/27] net/mlx4_core: Fix use of ENOSPC around mlx4_counter_alloc() Sasha Levin
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