CVE-2024-50294: rxrpc: Fix missing locking causing hanging calls

First published: Tue Nov 19 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix missing locking causing hanging calls If a call gets aborted (e.g. because kafs saw a signal) between it being queued for connection and the I/O thread picking up the call, the abort will be prioritised over the connection and it will be removed from local->new_client_calls by rxrpc_disconnect_client_call() without a lock being held. This may cause other calls on the list to disappear if a race occurs. Fix this by taking the client_call_lock when removing a call from whatever list its ->wait_link happens to be on.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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