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Message-Id: <20181120064139.19063-1-arjun@chelsio.com>
Date: Tue, 20 Nov 2018 12:11:39 +0530
From: Arjun Vynipadath <arjun@...lsio.com>
To: netdev@...r.kernel.org, davem@...emloft.net
Cc: nirranjan@...lsio.com, indranil@...lsio.com, dt@...lsio.com,
leon@...nel.org, Arjun Vynipadath <arjun@...lsio.com>,
Casey Leedom <leedom@...lsio.com>,
Ganesh Goudar <ganeshgr@...lsio.com>
Subject: [PATCH v2 net-next] cxgb4/cxgb4vf: Fix mac_hlist initialization and free
Null pointer dereference seen when cxgb4vf driver is unloaded
without bringing up any interfaces, moving mac_hlist initialization
to driver probe and free the mac_hlist in remove to fix the issue.
Fixes: 24357e06ba51 ("cxgb4vf: fix memleak in mac_hlist initialization")
Signed-off-by: Arjun Vynipadath <arjun@...lsio.com>
Signed-off-by: Casey Leedom <leedom@...lsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@...lsio.com>
---
v2:
- Updated commit description as per Leon's feedback
---
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c | 19 ++++++++++---------
drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c | 6 +++---
2 files changed, 13 insertions(+), 12 deletions(-)
diff --git a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
index 956e708..cdd6f48 100644
--- a/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
@@ -2280,8 +2280,6 @@ static int cxgb_up(struct adapter *adap)
#if IS_ENABLED(CONFIG_IPV6)
update_clip(adap);
#endif
- /* Initialize hash mac addr list*/
- INIT_LIST_HEAD(&adap->mac_hlist);
return err;
irq_err:
@@ -2295,8 +2293,6 @@ static int cxgb_up(struct adapter *adap)
static void cxgb_down(struct adapter *adapter)
{
- struct hash_mac_addr *entry, *tmp;
-
cancel_work_sync(&adapter->tid_release_task);
cancel_work_sync(&adapter->db_full_task);
cancel_work_sync(&adapter->db_drop_task);
@@ -2306,11 +2302,6 @@ static void cxgb_down(struct adapter *adapter)
t4_sge_stop(adapter);
t4_free_sge_resources(adapter);
- list_for_each_entry_safe(entry, tmp, &adapter->mac_hlist, list) {
- list_del(&entry->list);
- kfree(entry);
- }
-
adapter->flags &= ~FULL_INIT_DONE;
}
@@ -5629,6 +5620,9 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
(is_t5(adapter->params.chip) ? STATMODE_V(0) :
T6_STATMODE_V(0)));
+ /* Initialize hash mac addr list */
+ INIT_LIST_HEAD(&adapter->mac_hlist);
+
for_each_port(adapter, i) {
netdev = alloc_etherdev_mq(sizeof(struct port_info),
MAX_ETH_QSETS);
@@ -5907,6 +5901,7 @@ static int init_one(struct pci_dev *pdev, const struct pci_device_id *ent)
static void remove_one(struct pci_dev *pdev)
{
struct adapter *adapter = pci_get_drvdata(pdev);
+ struct hash_mac_addr *entry, *tmp;
if (!adapter) {
pci_release_regions(pdev);
@@ -5956,6 +5951,12 @@ static void remove_one(struct pci_dev *pdev)
if (adapter->num_uld || adapter->num_ofld_uld)
t4_uld_mem_free(adapter);
free_some_resources(adapter);
+ list_for_each_entry_safe(entry, tmp, &adapter->mac_hlist,
+ list) {
+ list_del(&entry->list);
+ kfree(entry);
+ }
+
#if IS_ENABLED(CONFIG_IPV6)
t4_cleanup_clip_tbl(adapter);
#endif
diff --git a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
index 8ec503c..8a2ad6b 100644
--- a/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
+++ b/drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
@@ -723,9 +723,6 @@ static int adapter_up(struct adapter *adapter)
if (adapter->flags & USING_MSIX)
name_msix_vecs(adapter);
- /* Initialize hash mac addr list*/
- INIT_LIST_HEAD(&adapter->mac_hlist);
-
adapter->flags |= FULL_INIT_DONE;
}
@@ -3038,6 +3035,9 @@ static int cxgb4vf_pci_probe(struct pci_dev *pdev,
if (err)
goto err_unmap_bar;
+ /* Initialize hash mac addr list */
+ INIT_LIST_HEAD(&adapter->mac_hlist);
+
/*
* Allocate our "adapter ports" and stitch everything together.
*/
--
2.9.5
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