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net: tcp2: Check pointer before use in accept

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The conn pointer NULL value was checked too late.

Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen 2020-04-02 18:14:50 +03:00 • committed by Anas Nashif
commit e1f06e26b2
1 changed files with 8 additions and 5 deletions
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13
subsys/net/ip/tcp2.c
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@ -1068,14 +1068,17 @@ int net_tcp_accept(struct net_context *context, net_tcp_accept_cb_t cb,
struct sockaddr local_addr = { };
u16_t local_port, remote_port;
NET_DBG("context: %p, tcp: %p, cb: %p", context, conn, cb);
conn->accept_cb = cb;
if (!conn || conn->state != TCP_LISTEN) {
if (!conn) {
return -EINVAL;
}
NET_DBG("context: %p, tcp: %p, cb: %p", context, conn, cb);
if (conn->state != TCP_LISTEN) {
return -EINVAL;
}
conn->accept_cb = cb;
local_addr.sa_family = net_context_get_family(context);
switch (local_addr.sa_family) {