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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-22 08:56:55 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-05-22 08:56:55 +0200 |
| commit | b4a338d2b3cafa1be68d4e1903203c7e08a38ee5 (patch) | |
| tree | 069f3753af1cda34c36a7627000ab46ef5c51c83 /net/ipv4/arp.c | |
| parent | 34cfb106d1f8a746fcccbe61c852f705dcdceaa2 (diff) | |
| parent | 08332893e37af6ae779367e78e444f8f9571511d (diff) | |
| download | op-kernel-dev-b4a338d2b3cafa1be68d4e1903203c7e08a38ee5.zip op-kernel-dev-b4a338d2b3cafa1be68d4e1903203c7e08a38ee5.tar.gz | |
Merge 4.12-rc2 into char-misc-next
We want the fixes in here as well to handle merge issues.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'net/ipv4/arp.c')
| -rw-r--r-- | net/ipv4/arp.c | 16 |
1 files changed, 14 insertions, 2 deletions
diff --git a/net/ipv4/arp.c b/net/ipv4/arp.c index 0937b34..d54345a 100644 --- a/net/ipv4/arp.c +++ b/net/ipv4/arp.c @@ -653,6 +653,7 @@ static int arp_process(struct net *net, struct sock *sk, struct sk_buff *skb) unsigned char *arp_ptr; struct rtable *rt; unsigned char *sha; + unsigned char *tha = NULL; __be32 sip, tip; u16 dev_type = dev->type; int addr_type; @@ -724,6 +725,7 @@ static int arp_process(struct net *net, struct sock *sk, struct sk_buff *skb) break; #endif default: + tha = arp_ptr; arp_ptr += dev->addr_len; } memcpy(&tip, arp_ptr, 4); @@ -842,8 +844,18 @@ static int arp_process(struct net *net, struct sock *sk, struct sk_buff *skb) It is possible, that this option should be enabled for some devices (strip is candidate) */ - is_garp = arp->ar_op == htons(ARPOP_REQUEST) && tip == sip && - addr_type == RTN_UNICAST; + is_garp = tip == sip && addr_type == RTN_UNICAST; + + /* Unsolicited ARP _replies_ also require target hwaddr to be + * the same as source. + */ + if (is_garp && arp->ar_op == htons(ARPOP_REPLY)) + is_garp = + /* IPv4 over IEEE 1394 doesn't provide target + * hardware address field in its ARP payload. + */ + tha && + !memcmp(tha, sha, dev->addr_len); if (!n && ((arp->ar_op == htons(ARPOP_REPLY) && |
