Add a check to ensure that we haven't already removed the delegation
from the inode after we take all the relevant locks.
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
fs/nfs/delegation.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index e60737be6f26..b49faf1b3d91 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -287,6 +287,10 @@ nfs_detach_delegation_locked(struct nfs_inode *nfsi,
return NULL;
spin_lock(&delegation->lock);
+ if (!delegation->inode) {
+ spin_unlock(&delegation->lock);
+ return NULL;
+ }
set_bit(NFS_DELEGATION_RETURNING, &delegation->flags);
list_del_rcu(&delegation->super_list);
delegation->inode = NULL;
--
2.21.0
