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tipc: eliminate access after delete in group_filter_msg()

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KASAN revealed another access after delete in group.c. This time
it found that we read the header of a received message after the
buffer has been released.

Signed-off-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Jon Maloy 2017-11-27 20:13:39 +01:00 committed by David S. Miller
parent 5b5971df3b
commit 2e724dca77
1 changed files with 1 additions and 1 deletions
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2
net/tipc/group.c
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@ -497,6 +497,7 @@ void tipc_group_filter_msg(struct tipc_group *grp, struct sk_buff_head *inputq,
while ((skb = skb_peek(defq))) {
hdr = buf_msg(skb);
mtyp = msg_type(hdr);
blks = msg_blocks(hdr);
deliver = true;
ack = false;
update = false;
@ -546,7 +547,6 @@ void tipc_group_filter_msg(struct tipc_group *grp, struct sk_buff_head *inputq,
if (!update)
continue;
blks = msg_blocks(hdr);
tipc_group_update_rcv_win(grp, blks, node, port, xmitq);
}
return;