On 12/9/19 6:11 PM, Tuong Lien wrote: > In the function 'tipc_disc_rcv()', the 'msg_peer_net_hash()' is called > to read the header data field but after the message skb has been freed, > that might result in a garbage value... > > This commit fixes it by defining a new local variable to store the data > first, just like the other header fields' handling. > > Fixes: f73b12812a3d ("tipc: improve throughput between nodes in netns") > Signed-off-by: Tuong Lien <tuong.t.l...@dektech.com.au>
Acked-by: Ying Xue <ying....@windriver.com> > --- > net/tipc/discover.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) > > diff --git a/net/tipc/discover.c b/net/tipc/discover.c > index b043e8c6397a..bfe43da127c0 100644 > --- a/net/tipc/discover.c > +++ b/net/tipc/discover.c > @@ -194,6 +194,7 @@ void tipc_disc_rcv(struct net *net, struct sk_buff *skb, > { > struct tipc_net *tn = tipc_net(net); > struct tipc_msg *hdr = buf_msg(skb); > + u32 pnet_hash = msg_peer_net_hash(hdr); > u16 caps = msg_node_capabilities(hdr); > bool legacy = tn->legacy_addr_format; > u32 sugg = msg_sugg_node_addr(hdr); > @@ -242,9 +243,8 @@ void tipc_disc_rcv(struct net *net, struct sk_buff *skb, > return; > if (!tipc_in_scope(legacy, b->domain, src)) > return; > - tipc_node_check_dest(net, src, peer_id, b, caps, signature, > - msg_peer_net_hash(hdr), &maddr, &respond, > - &dupl_addr); > + tipc_node_check_dest(net, src, peer_id, b, caps, signature, pnet_hash, > + &maddr, &respond, &dupl_addr); > if (dupl_addr) > disc_dupl_alert(b, src, &maddr); > if (!respond) > _______________________________________________ tipc-discussion mailing list tipc-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/tipc-discussion