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cxgb4/cxgb4vf: Fix mac_hlist initialization and free

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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: 24357e06ba ("cxgb4vf: fix memleak in mac_hlist initialization")
Signed-off-by: Arjun Vynipadath <arjun@chelsio.com>
Signed-off-by: Casey Leedom <leedom@chelsio.com>
Signed-off-by: Ganesh Goudar <ganeshgr@chelsio.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Arjun Vynipadath 2018-11-20 12:11:39 +05:30 • committed by David S. Miller
parent ade9628ed0
commit b539ea60f5
2 changed files with 13 additions and 12 deletions
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19
drivers/net/ethernet/chelsio/cxgb4/cxgb4_main.c
View file

@ -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 @@ fw_attach_fail:
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

6
drivers/net/ethernet/chelsio/cxgb4vf/cxgb4vf_main.c
View file

@ -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.
*/