From 2cf446c9b78a2b93499f81f07209a6068355e7b8 Mon Sep 17 00:00:00 2001 From: hselasky Date: Fri, 19 May 2017 13:05:40 +0000 Subject: [PATCH] MFC r317505: Don't free uninitialized sysctl contexts in the mlx4en driver. This can cause NULL pointer panics during failed device attach. Differential Revision: https://reviews.freebsd.org/D8876 Sponsored by: Mellanox Technologies git-svn-id: svn://svn.freebsd.org/base/stable/9@318541 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f --- sys/ofed/drivers/net/mlx4/en_netdev.c | 13 ++++++------- sys/ofed/drivers/net/mlx4/mlx4_en.h | 3 ++- 2 files changed, 8 insertions(+), 8 deletions(-) diff --git a/sys/ofed/drivers/net/mlx4/en_netdev.c b/sys/ofed/drivers/net/mlx4/en_netdev.c index b2b15602a..eb5965a3f 100644 --- a/sys/ofed/drivers/net/mlx4/en_netdev.c +++ b/sys/ofed/drivers/net/mlx4/en_netdev.c @@ -1640,7 +1640,7 @@ void mlx4_en_free_resources(struct mlx4_en_priv *priv) mlx4_en_destroy_cq(priv, &priv->rx_cq[i]); } - if (priv->sysctl) + if (priv->stat_sysctl != NULL) sysctl_ctx_free(&priv->stat_ctx); } @@ -1755,7 +1755,7 @@ void mlx4_en_destroy_netdev(struct net_device *dev) mlx4_en_free_resources(priv); /* freeing the sysctl conf cannot be called from within mlx4_en_free_resources */ - if (priv->sysctl) + if (priv->conf_sysctl != NULL) sysctl_ctx_free(&priv->conf_ctx); kfree(priv->tx_ring); @@ -2573,9 +2573,9 @@ static void mlx4_en_sysctl_conf(struct mlx4_en_priv *priv) pnameunit = device_get_nameunit(priv->mdev->pdev->dev.bsddev); sysctl_ctx_init(ctx); - priv->sysctl = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_hw), + priv->conf_sysctl = SYSCTL_ADD_NODE(ctx, SYSCTL_STATIC_CHILDREN(_hw), OID_AUTO, dev->if_xname, CTLFLAG_RD, 0, "mlx4 10gig ethernet"); - node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(priv->sysctl), OID_AUTO, + node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(priv->conf_sysctl), OID_AUTO, "conf", CTLFLAG_RD, NULL, "Configuration"); node_list = SYSCTL_CHILDREN(node); @@ -2638,7 +2638,6 @@ static void mlx4_en_sysctl_conf(struct mlx4_en_priv *priv) static void mlx4_en_sysctl_stat(struct mlx4_en_priv *priv) { struct sysctl_ctx_list *ctx; - struct sysctl_oid *node; struct sysctl_oid_list *node_list; struct sysctl_oid *ring_node; struct sysctl_oid_list *ring_list; @@ -2649,9 +2648,9 @@ static void mlx4_en_sysctl_stat(struct mlx4_en_priv *priv) ctx = &priv->stat_ctx; sysctl_ctx_init(ctx); - node = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(priv->sysctl), OID_AUTO, + priv->stat_sysctl = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(priv->conf_sysctl), OID_AUTO, "stat", CTLFLAG_RD, NULL, "Statistics"); - node_list = SYSCTL_CHILDREN(node); + node_list = SYSCTL_CHILDREN(priv->stat_sysctl); #ifdef MLX4_EN_PERF_STAT SYSCTL_ADD_UINT(ctx, node_list, OID_AUTO, "tx_poll", CTLFLAG_RD, diff --git a/sys/ofed/drivers/net/mlx4/mlx4_en.h b/sys/ofed/drivers/net/mlx4/mlx4_en.h index 35829e40d..9997509aa 100644 --- a/sys/ofed/drivers/net/mlx4/mlx4_en.h +++ b/sys/ofed/drivers/net/mlx4/mlx4_en.h @@ -586,7 +586,8 @@ struct mlx4_en_priv { struct callout watchdog_timer; struct ifmedia media; volatile int blocked; - struct sysctl_oid *sysctl; + struct sysctl_oid *conf_sysctl; + struct sysctl_oid *stat_sysctl; struct sysctl_ctx_list conf_ctx; struct sysctl_ctx_list stat_ctx; #define MLX4_EN_MAC_HASH_IDX 5 -- 2.42.0