diff options
| author | stephen hemminger <shemming@brocade.com> | 2015-11-17 14:26:06 -0800 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-11-18 14:58:03 -0500 |
| commit | 52d178516dcf61e7a59363a572458c830af6e520 (patch) | |
| tree | 2b23b754f77f5aec29282d380f94f2a8f62958dc /drivers | |
| parent | 6f97532ef05e49f1998a09f8359b83d00a7b3229 (diff) | |
| download | linux-stable-52d178516dcf61e7a59363a572458c830af6e520.tar.gz linux-stable-52d178516dcf61e7a59363a572458c830af6e520.tar.bz2 linux-stable-52d178516dcf61e7a59363a572458c830af6e520.zip | |
hdlc: fix null-deref on allocation failure
If alloc_netdev() failed and return NULL, then the next instruction
would dereference it. Found by Coverity.
Compile tested only. Not sure if anyone still uses this driver
(or the whole WAN subsystem).
Signed-off-by: Stephen Hemminger <stephen@networkplumber.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/net/wan/hdlc_fr.c | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/drivers/net/wan/hdlc_fr.c b/drivers/net/wan/hdlc_fr.c index e92aaf615901..89541cc90e87 100644 --- a/drivers/net/wan/hdlc_fr.c +++ b/drivers/net/wan/hdlc_fr.c @@ -1075,11 +1075,10 @@ static int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type) used = pvc_is_used(pvc); - if (type == ARPHRD_ETHER) { + if (type == ARPHRD_ETHER) dev = alloc_netdev(0, "pvceth%d", NET_NAME_UNKNOWN, ether_setup); - dev->priv_flags &= ~IFF_TX_SKB_SHARING; - } else + else dev = alloc_netdev(0, "pvc%d", NET_NAME_UNKNOWN, pvc_setup); if (!dev) { @@ -1088,9 +1087,10 @@ static int fr_add_pvc(struct net_device *frad, unsigned int dlci, int type) return -ENOBUFS; } - if (type == ARPHRD_ETHER) + if (type == ARPHRD_ETHER) { + dev->priv_flags &= ~IFF_TX_SKB_SHARING; eth_hw_addr_random(dev); - else { + } else { *(__be16*)dev->dev_addr = htons(dlci); dlci_to_q922(dev->broadcast, dlci); } |