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fsl/fman: check dereferencing null pointer

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[ Upstream commit cc5d229a122106733a85c279d89d7703f21e4d4f ]

Add a safe check to avoid dereferencing null pointer

Fixes: 57ba4c9b56 ("fsl/fman: Add FMan MAC support")
Signed-off-by: Florinel Iordache <florinel.iordache@nxp.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Florinel Iordache 2020-08-03 10:07:33 +03:00 • committed by Greg Kroah-Hartman
commit 2997cea07f
3 changed files with 4 additions and 4 deletions
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4
drivers/net/ethernet/freescale/fman/fman_dtsec.c
View file

@ -1205,7 +1205,7 @@ int dtsec_del_hash_mac_address(struct fman_mac *dtsec, enet_addr_t *eth_addr)
list_for_each(pos,
&dtsec->multicast_addr_hash->lsts[bucket]) {
hash_entry = ETH_HASH_ENTRY_OBJ(pos);
if (hash_entry->addr == addr) {
if (hash_entry && hash_entry->addr == addr) {
list_del_init(&hash_entry->node);
kfree(hash_entry);
break;
@ -1218,7 +1218,7 @@ int dtsec_del_hash_mac_address(struct fman_mac *dtsec, enet_addr_t *eth_addr)
list_for_each(pos,
&dtsec->unicast_addr_hash->lsts[bucket]) {
hash_entry = ETH_HASH_ENTRY_OBJ(pos);
if (hash_entry->addr == addr) {
if (hash_entry && hash_entry->addr == addr) {
list_del_init(&hash_entry->node);
kfree(hash_entry);
break;

2
drivers/net/ethernet/freescale/fman/fman_memac.c
View file

@ -985,7 +985,7 @@ int memac_del_hash_mac_address(struct fman_mac *memac, enet_addr_t *eth_addr)
list_for_each(pos, &memac->multicast_addr_hash->lsts[hash]) {
hash_entry = ETH_HASH_ENTRY_OBJ(pos);
if (hash_entry->addr == addr) {
if (hash_entry && hash_entry->addr == addr) {
list_del_init(&hash_entry->node);
kfree(hash_entry);
break;

2
drivers/net/ethernet/freescale/fman/fman_tgec.c
View file

@ -630,7 +630,7 @@ int tgec_del_hash_mac_address(struct fman_mac *tgec, enet_addr_t *eth_addr)
list_for_each(pos, &tgec->multicast_addr_hash->lsts[hash]) {
hash_entry = ETH_HASH_ENTRY_OBJ(pos);
if (hash_entry->addr == addr) {
if (hash_entry && hash_entry->addr == addr) {
list_del_init(&hash_entry->node);
kfree(hash_entry);
break;