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Message-ID: <20210408074718.14331-1-jianbol@nvidia.com>
Date: Thu, 8 Apr 2021 07:47:18 +0000
From: Jianbo Liu <jianbol@...dia.com>
To: <netdev@...r.kernel.org>
CC: <pablo@...filter.org>, Jianbo Liu <jianbol@...dia.com>,
Roi Dayan <roid@...dia.com>
Subject: [PATCH net] net: flow_offload: Fix UBSAN invalid-load warning in tcf_block_unbind
When device is removed, indirect block is unregisterd. As
bo->unlocked_driver_cb is not initialized, the following UBSAN is
triggered.
UBSAN: invalid-load in net/sched/cls_api.c:1496:10
load of value 6 is not a valid value for type '_Bool'
This patch fixes the warning by calling device's indr block bind
callback, and unlocked_driver_cb is assigned with correct value.
Fixes: 0fdcf78d5973 ("net: use flow_indr_dev_setup_offload()")
Signed-off-by: Jianbo Liu <jianbol@...dia.com>
Reviewed-by: Roi Dayan <roid@...dia.com>
---
include/net/flow_offload.h | 11 ++++++-----
net/core/flow_offload.c | 13 +++++++------
net/sched/cls_api.c | 11 ++++++++---
3 files changed, 21 insertions(+), 14 deletions(-)
diff --git a/include/net/flow_offload.h b/include/net/flow_offload.h
index dc5c1e69cd9f..8cdc60833890 100644
--- a/include/net/flow_offload.h
+++ b/include/net/flow_offload.h
@@ -459,6 +459,11 @@ typedef int flow_setup_cb_t(enum tc_setup_type type, void *type_data,
struct flow_block_cb;
+typedef int flow_indr_block_bind_cb_t(struct net_device *dev, struct Qdisc *sch, void *cb_priv,
+ enum tc_setup_type type, void *type_data,
+ void *data,
+ void (*cleanup)(struct flow_block_cb *block_cb));
+
struct flow_block_indr {
struct list_head list;
struct net_device *dev;
@@ -466,6 +471,7 @@ struct flow_block_indr {
enum flow_block_binder_type binder_type;
void *data;
void *cb_priv;
+ flow_indr_block_bind_cb_t *setup_cb;
void (*cleanup)(struct flow_block_cb *block_cb);
};
@@ -562,11 +568,6 @@ static inline void flow_block_init(struct flow_block *flow_block)
INIT_LIST_HEAD(&flow_block->cb_list);
}
-typedef int flow_indr_block_bind_cb_t(struct net_device *dev, struct Qdisc *sch, void *cb_priv,
- enum tc_setup_type type, void *type_data,
- void *data,
- void (*cleanup)(struct flow_block_cb *block_cb));
-
int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv);
void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
void (*release)(void *cb_priv));
diff --git a/net/core/flow_offload.c b/net/core/flow_offload.c
index 715b67f6c62f..85a3d8530952 100644
--- a/net/core/flow_offload.c
+++ b/net/core/flow_offload.c
@@ -373,7 +373,8 @@ int flow_indr_dev_register(flow_indr_block_bind_cb_t *cb, void *cb_priv)
}
EXPORT_SYMBOL(flow_indr_dev_register);
-static void __flow_block_indr_cleanup(void (*release)(void *cb_priv),
+static void __flow_block_indr_cleanup(struct flow_indr_dev *indr_dev,
+ void (*release)(void *cb_priv),
void *cb_priv,
struct list_head *cleanup_list)
{
@@ -381,8 +382,10 @@ static void __flow_block_indr_cleanup(void (*release)(void *cb_priv),
list_for_each_entry_safe(this, next, &flow_block_indr_list, indr.list) {
if (this->release == release &&
- this->indr.cb_priv == cb_priv)
+ this->indr.cb_priv == cb_priv) {
+ this->indr.setup_cb = indr_dev->cb;
list_move(&this->indr.list, cleanup_list);
+ }
}
}
@@ -390,10 +393,8 @@ static void flow_block_indr_notify(struct list_head *cleanup_list)
{
struct flow_block_cb *this, *next;
- list_for_each_entry_safe(this, next, cleanup_list, indr.list) {
- list_del(&this->indr.list);
+ list_for_each_entry_safe(this, next, cleanup_list, indr.list)
this->indr.cleanup(this);
- }
}
void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
@@ -418,7 +419,7 @@ void flow_indr_dev_unregister(flow_indr_block_bind_cb_t *cb, void *cb_priv,
return;
}
- __flow_block_indr_cleanup(release, cb_priv, &cleanup_list);
+ __flow_block_indr_cleanup(this, release, cb_priv, &cleanup_list);
mutex_unlock(&flow_indr_block_lock);
flow_block_indr_notify(&cleanup_list);
diff --git a/net/sched/cls_api.c b/net/sched/cls_api.c
index d3db70865d66..b213206da728 100644
--- a/net/sched/cls_api.c
+++ b/net/sched/cls_api.c
@@ -646,7 +646,7 @@ static void tc_block_indr_cleanup(struct flow_block_cb *block_cb)
struct net_device *dev = block_cb->indr.dev;
struct Qdisc *sch = block_cb->indr.sch;
struct netlink_ext_ack extack = {};
- struct flow_block_offload bo;
+ struct flow_block_offload bo = {};
tcf_block_offload_init(&bo, dev, sch, FLOW_BLOCK_UNBIND,
block_cb->indr.binder_type,
@@ -654,8 +654,13 @@ static void tc_block_indr_cleanup(struct flow_block_cb *block_cb)
&extack);
rtnl_lock();
down_write(&block->cb_lock);
- list_del(&block_cb->driver_list);
- list_move(&block_cb->list, &bo.cb_list);
+ if (!block_cb->indr.setup_cb ||
+ block_cb->indr.setup_cb(dev, sch, block_cb->indr.cb_priv,
+ TC_SETUP_BLOCK, &bo, block, NULL)) {
+ list_del(&block_cb->indr.list);
+ list_del(&block_cb->driver_list);
+ list_move(&block_cb->list, &bo.cb_list);
+ }
tcf_block_unbind(block, &bo);
up_write(&block->cb_lock);
rtnl_unlock();
--
2.26.2
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