The patch below does not apply to the 3.10-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@xxxxxxxxxxxxxxx>.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
>From 7c0af9ffb7bb4e5355470fa60b3eb711ddf226fa Mon Sep 17 00:00:00 2001
From: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
Date: Thu, 26 Feb 2015 12:54:46 -0500
Subject: [PATCH] NFSv4: Don't call put_rpccred() under the rcu_read_lock()
put_rpccred() can sleep.
Fixes: 8f649c3762547 ("NFSv4: Fix the locking in nfs_inode_reclaim_delegation()")
Cc: stable@xxxxxxxxxxxxxxx # 2.6.35+
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index a1f0685b42ff..2e37d8315d92 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -181,8 +181,8 @@ void nfs_inode_reclaim_delegation(struct inode *inode, struct rpc_cred *cred,
clear_bit(NFS_DELEGATION_NEED_RECLAIM,
&delegation->flags);
spin_unlock(&delegation->lock);
- put_rpccred(oldcred);
rcu_read_unlock();
+ put_rpccred(oldcred);
trace_nfs4_reclaim_delegation(inode, res->delegation_type);
} else {
/* We appear to have raced with a delegation return. */
--
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