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NFSv4: Ensure the delegation is pinned in nfs_do_return_delegation()
authorTrond Myklebust <trondmy@gmail.com>
Thu, 13 Feb 2020 19:51:06 +0000 (14:51 -0500)
committerAnna Schumaker <Anna.Schumaker@Netapp.com>
Thu, 13 Feb 2020 21:18:50 +0000 (16:18 -0500)
commit8c75593c6eee0f661ddf25dfde0e6ad2a84be7a9
treeb4af6d59d60f5e555082220cdde1798610e5dff9tree | snapshot
parentcd1b659d8ce7697ee9799b64f887528315b9097bcommit | diff
NFSv4: Ensure the delegation is pinned in nfs_do_return_delegation()

The call to nfs_do_return_delegation() needs to be taken without
any RCU locks. Add a refcount to make sure the delegation remains
pinned in memory until we're done.

Fixes: ee05f456772d ("NFSv4: Fix races between open and delegreturn")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
fs/nfs/delegation.c diff | blob | blame | history
fs/nfs/delegation.h diff | blob | blame | history
Michael's Linux tree.