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rxrpc: Don't release call mutex on error pointer 

Don't release call mutex at the end of rxrpc_kernel_begin_call() if the
call pointer actually holds an error value.

Fixes: 540b1c48c3 ("rxrpc: Fix deadlock between call creation and sendmsg/recvmsg")
Reported-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
David Howells 2017-10-20 17:01:22 +01:00 committed by David S. Miller
parent 748759d57e
commit 6cb3ece968
1 changed files with 3 additions and 2 deletions
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5
net/rxrpc/af_rxrpc.c
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@ -308,10 +308,11 @@ struct rxrpc_call *rxrpc_kernel_begin_call(struct socket *sock,
call = rxrpc_new_client_call(rx, &cp, srx, user_call_ID, tx_total_len,
gfp);
/* The socket has been unlocked. */
if (!IS_ERR(call))
if (!IS_ERR(call)) {
call->notify_rx = notify_rx;
mutex_unlock(&call->user_mutex);
}
mutex_unlock(&call->user_mutex);
_leave(" = %p", call);
return call;
}