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[net,03/13] rxrpc: Fix oops on incoming call to serviceless endpoint

Message ID 147574825741.30350.420157129957865179.stgit@warthog.procyon.org.uk
State Accepted, archived
Delegated to: David Miller
Headers show

Commit Message

David Howells Oct. 6, 2016, 10:04 a.m. UTC
If an call comes in to a local endpoint that isn't listening for any
incoming calls at the moment, an oops will happen.  We need to check that
the local endpoint's service pointer isn't NULL before we dereference it.

Signed-off-by: David Howells <dhowells@redhat.com>
---

 net/rxrpc/call_accept.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
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Patch

diff --git a/net/rxrpc/call_accept.c b/net/rxrpc/call_accept.c
index 3cac231d8405..22cd8a18c481 100644
--- a/net/rxrpc/call_accept.c
+++ b/net/rxrpc/call_accept.c
@@ -337,7 +337,7 @@  struct rxrpc_call *rxrpc_new_incoming_call(struct rxrpc_local *local,
 
 	/* Get the socket providing the service */
 	rx = rcu_dereference(local->service);
-	if (service_id == rx->srx.srx_service)
+	if (rx && service_id == rx->srx.srx_service)
 		goto found_service;
 
 	trace_rxrpc_abort("INV", sp->hdr.cid, sp->hdr.callNumber, sp->hdr.seq,