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>,
Shay Drory <shayd@nvidia.com>
Subject: [net 11/15] net/mlx5: Devcom, fix error flow in mlx5_devcom_register_device
Date: Mon, 22 May 2023 22:42:38 -0700 [thread overview]
Message-ID: <20230523054242.21596-12-saeed@kernel.org> (raw)
In-Reply-To: <20230523054242.21596-1-saeed@kernel.org>
From: Shay Drory <shayd@nvidia.com>
In case devcom allocation is failed, mlx5 is always freeing the priv.
However, this priv might have been allocated by a different thread,
and freeing it might lead to use-after-free bugs.
Fix it by freeing the priv only in case it was allocated by the
running thread.
Fixes: fadd59fc50d0 ("net/mlx5: Introduce inter-device communication mechanism")
Signed-off-by: Shay Drory <shayd@nvidia.com>
Signed-off-by: Saeed Mahameed <saeedm@nvidia.com>
---
drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c b/drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c
index 070d55f13419..8f978491dd32 100644
--- a/drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c
+++ b/drivers/net/ethernet/mellanox/mlx5/core/lib/devcom.c
@@ -112,7 +112,8 @@ struct mlx5_devcom *mlx5_devcom_register_device(struct mlx5_core_dev *dev)
priv->devs[idx] = dev;
devcom = mlx5_devcom_alloc(priv, idx);
if (!devcom) {
- kfree(priv);
+ if (new_priv)
+ kfree(priv);
return ERR_PTR(-ENOMEM);
}
--
2.40.1
next prev parent reply other threads:[~2023-05-23 5:43 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-23 5:42 [pull request][net 00/15] mlx5 fixes 2023-05-22 Saeed Mahameed
2023-05-23 5:42 ` [net 01/15] net/mlx5: Collect command failures data only for known commands Saeed Mahameed
2023-05-24 7:50 ` patchwork-bot+netdevbpf
2023-05-23 5:42 ` [net 02/15] net/mlx5: Handle pairing of E-switch via uplink un/load APIs Saeed Mahameed
2023-05-23 5:42 ` [net 03/15] net/mlx5: DR, Fix crc32 calculation to work on big-endian (BE) CPUs Saeed Mahameed
2023-05-23 5:42 ` [net 04/15] net/mlx5: DR, Check force-loopback RC QP capability independently from RoCE Saeed Mahameed
2023-05-23 5:42 ` [net 05/15] net/mlx5e: Use correct encap attribute during invalidation Saeed Mahameed
2023-05-23 5:42 ` [net 06/15] net/mlx5: Fix error message when failing to allocate device memory Saeed Mahameed
2023-05-23 5:42 ` [net 07/15] net/mlx5e: Fix deadlock in tc route query code Saeed Mahameed
2023-05-23 5:42 ` [net 08/15] net/mlx5e: Fix SQ wake logic in ptp napi_poll context Saeed Mahameed
2023-05-23 5:42 ` [net 09/15] net/mlx5e: TC, Fix using eswitch mapping in nic mode Saeed Mahameed
2023-05-23 5:42 ` [net 10/15] net/mlx5: E-switch, Devcom, sync devcom events and devcom comp register Saeed Mahameed
2023-05-23 5:42 ` Saeed Mahameed [this message]
2023-05-23 5:42 ` [net 12/15] net/mlx5: Devcom, serialize devcom registration Saeed Mahameed
2023-05-23 5:42 ` [net 13/15] net/mlx5: Free irqs only on shutdown callback Saeed Mahameed
2023-05-23 5:42 ` [net 14/15] net/mlx5: Fix irq affinity management Saeed Mahameed
2023-05-23 5:42 ` [net 15/15] net/mlx5: Fix indexing of mlx5_irq Saeed Mahameed
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