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net/mlx4_en: fix a memory leak bug 

In mlx4_en_config_rss_steer(), 'rss_map->indir_qp' is allocated through
kzalloc(). After that, mlx4_qp_alloc() is invoked to configure RSS
indirection. However, if mlx4_qp_alloc() fails, the allocated
'rss_map->indir_qp' is not deallocated, leading to a memory leak bug.

To fix the above issue, add the 'qp_alloc_err' label to free
'rss_map->indir_qp'.

Fixes: 4931c6ef04 ("net/mlx4_en: Optimized single ring steering")
Signed-off-by: Wenwen Wang <wenwen@cs.uga.edu>
Reviewed-by: Tariq Toukan <tariqt@mellanox.com>
Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
This commit is contained in:
Wenwen Wang 2019-08-12 14:11:35 -05:00 committed by Jakub Kicinski
parent 66cf4710b2
commit 48ec7014c5
1 changed files with 2 additions and 1 deletions
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3
drivers/net/ethernet/mellanox/mlx4/en_rx.c
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@ -1187,7 +1187,7 @@ int mlx4_en_config_rss_steer(struct mlx4_en_priv *priv)
err = mlx4_qp_alloc(mdev->dev, priv->base_qpn, rss_map->indir_qp);
if (err) {
en_err(priv, "Failed to allocate RSS indirection QP\n");
goto rss_err;
goto qp_alloc_err;
}
rss_map->indir_qp->event = mlx4_en_sqp_event;
@ -1241,6 +1241,7 @@ indir_err:
MLX4_QP_STATE_RST, NULL, 0, 0, rss_map->indir_qp);
mlx4_qp_remove(mdev->dev, rss_map->indir_qp);
mlx4_qp_free(mdev->dev, rss_map->indir_qp);
qp_alloc_err:
kfree(rss_map->indir_qp);
rss_map->indir_qp = NULL;
rss_err: