-
Rick Macklem authored
When the NFSv4.1/4.2 client is doing a pnfs mount to mirrored DS(s), asynchronous threads are used to do the RPCs against the DS(s) concurrently. If a DS is slow to reply, it is possible for the "cred" to be free'd before the asynchronous thread is done with it, causing a panic/crash. This patch fixes the problem by acquiring a refcount on the "cred" while it is being used by the asynchronous thread for a DS RPC. This bug was found during a recent IETF NFSv4 testing event. This bug only affects "pnfs" mounts to mirrored pNFS servers. MFC after: 2 weeks
70910e4b