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network/ipv4: Fix NULL dereference in multicast-send.

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Fixes the KDL in #18585.
While at it, add a missing NULL check and fix a leak.
This commit is contained in:
Augustin Cavalier 2023-09-20 16:39:09 -04:00
parent 39fa47a536
commit 2903a69d4a
1 changed files with 8 additions and 2 deletions
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10
src/add-ons/kernel/network/protocols/ipv4/ipv4.cpp
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@ -1550,10 +1550,13 @@ ipv4_send_routed_data(net_protocol* _protocol, struct net_route* route,
}
if ((buffer->flags & MSG_MCAST) != 0
&& protocol->multicast_loopback) {
&& (protocol != NULL && protocol->multicast_loopback)) {
// copy an IP multicast packet to the input queue of the loopback
// interface
net_buffer *loopbackBuffer = gBufferModule->duplicate(buffer);
if (loopbackBuffer == NULL)
return B_NO_MEMORY;
status_t status = B_ERROR;
// get the IPv4 loopback address
struct sockaddr loopbackAddress;
@ -1568,8 +1571,11 @@ ipv4_send_routed_data(net_protocol* _protocol, struct net_route* route,
sDatalinkModule->put_interface_address(
loopbackBuffer->interface_address);
loopbackBuffer->interface_address = address;
ipv4_receive_data(loopbackBuffer);
status = ipv4_receive_data(loopbackBuffer);
}
if (status != B_OK)
gBufferModule->free(loopbackBuffer);
}
TRACE_SK(protocol, " SendRoutedData(): header chksum: %" B_PRIu32