linux-kernel - [PATCH] nfsd: fix bug on nfs4 stateid deallocation

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Date:	Mon, 11 Mar 2013 08:29:46 +0800
From:	ycnian@...il.com
To:	bfields@...ldses.org
Cc:	linux-kernel@...r.kernel.org, linux-nfs@...r.kernel.org
Subject: [PATCH] nfsd: fix bug on nfs4 stateid deallocation

NFS4_OO_PURGE_CLOSE is not handled properly. To avoid memory leak, nfs4 
stateid which is pointed by oo_last_closed_stid is freed in nfsd4_close(),
but NFS4_OO_PURGE_CLOSE isn't cleared meanwhile. So the stateid released 
in THIS close procedure may be freed immediately in the coming encoding
function.

---
 fs/nfsd/nfs4state.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 75c873d..7499c91 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3850,6 +3850,7 @@ nfsd4_close(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 
 	nfsd4_close_open_stateid(stp);
 	release_last_closed_stateid(oo);
+	oo->oo_flags &= ~NFS4_OO_PURGE_CLOSE;
 	oo->oo_last_closed_stid = stp;
 
 	if (list_empty(&oo->oo_owner.so_stateids)) {
-- 
1.8.0.1

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