提交 02c00c2a 编写于 作者: J Jon Paul Maloy 提交者: David S. Miller

tipc: fix potential bug in function tipc_backlog_rcv

In commit 4f4482dc ("tipc: compensate
for double accounting in socket rcv buffer") we access 'truesize' of
a received buffer after it might have been released by the function
filter_rcv().

In this commit we correct this by reading the value of 'truesize' to
the stack before delivering the buffer to filter_rcv().
Signed-off-by: NJon Maloy <jon.maloy@ericsson.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>
上级 cf97b8ff
/*
* net/tipc/socket.c: TIPC socket API
* net/tipc/socket.c: TIPC socket API
*
* Copyright (c) 2001-2007, 2012-2014, Ericsson AB
* Copyright (c) 2004-2008, 2010-2013, Wind River Systems
......@@ -1431,13 +1431,14 @@ static int tipc_backlog_rcv(struct sock *sk, struct sk_buff *buf)
{
u32 res;
struct tipc_sock *tsk = tipc_sk(sk);
uint truesize = buf->truesize;
res = filter_rcv(sk, buf);
if (unlikely(res))
tipc_reject_msg(buf, res);
if (atomic_read(&tsk->dupl_rcvcnt) < TIPC_CONN_OVERLOAD_LIMIT)
atomic_add(buf->truesize, &tsk->dupl_rcvcnt);
atomic_add(truesize, &tsk->dupl_rcvcnt);
return 0;
}
......
Markdown is supported
0% .
You are about to add 0 people to the discussion. Proceed with caution.
先完成此消息的编辑!
想要评论请 注册