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don't close freerdp_peer underlying socket twice

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freerdp_peer->Disconnect calls BIO_free which then calls close on the
underlying file descriptor.

Then when freerdp_peer_free is called, the file descriptor is closed
again.

This is problematic if the file descriptor is recycled in between:

thread 1: freerdp_peer_new(42);
thread 1: freerdp_peer->Disconnect() closes 42
thread 2: opens a file with fd 42
thread 1: freerdp_peer_free closes 42
thread 2: uses closed file descriptor 42
This commit is contained in:
Rubycat 2024-02-09 16:13:32 +01:00 committed by akallabeth
parent 4be2e2db2d
commit 3c2c6cc1d5
1 changed files with 3 additions and 1 deletions
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4
libfreerdp/core/peer.c
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@ -1495,7 +1495,8 @@ void freerdp_peer_free(freerdp_peer* client)
return;
sspi_FreeAuthIdentity(&client->identity);
closesocket((SOCKET)client->sockfd);
if (client->sockfd >= 0)
closesocket((SOCKET)client->sockfd);
free(client);
}
@ -1511,6 +1512,7 @@ static BOOL freerdp_peer_transport_setup(freerdp_peer* client)
if (!transport_attach(rdp->transport, client->sockfd))
return FALSE;
client->sockfd = -1;
if (!transport_set_recv_callbacks(rdp->transport, peer_recv_callback, client))
return FALSE;