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tipc: refactor node xmit and fix memory leaks

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Refactor tipc_node_xmit() to fail fast and fail early. Fix several
potential memory leaks in unexpected error paths.

Reported-by: Dmitry Vyukov <dvyukov@google.com>
Reviewed-by: Jon Maloy <jon.maloy@ericsson.com>
Signed-off-by: Richard Alpe <richard.alpe@ericsson.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Richard Alpe 2016-02-11 10:43:15 +01:00 • committed by David S. Miller
parent 37ace20a3c
commit 4952cd3e7b
2 changed files with 40 additions and 26 deletions
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8
net/tipc/link.c
View file

@ -903,8 +903,10 @@ int tipc_link_xmit(struct tipc_link *l, struct sk_buff_head *list,
if (unlikely(l->backlog[i].len >= l->backlog[i].limit))
return link_schedule_user(l, list);
}
if (unlikely(msg_size(hdr) > mtu))
if (unlikely(msg_size(hdr) > mtu)) {
skb_queue_purge(list);
return -EMSGSIZE;
}
/* Prepare each packet for sending, and add to relevant queue: */
while (skb_queue_len(list)) {
@ -916,8 +918,10 @@ int tipc_link_xmit(struct tipc_link *l, struct sk_buff_head *list,
if (likely(skb_queue_len(transmq) < maxwin)) {
_skb = skb_clone(skb, GFP_ATOMIC);
if (!_skb)
if (!_skb) {
skb_queue_purge(list);
return -ENOBUFS;
}
__skb_dequeue(list);
__skb_queue_tail(transmq, skb);
__skb_queue_tail(xmitq, _skb);