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From:   trondmy@kernel.org
To:     linux-nfs@vger.kernel.org
Subject: [PATCH 1/4] pNFS/NFSv4: Fix a layout segment leak in pnfs_layout_process()
Date:   Sun, 24 Jan 2021 20:54:32 -0500
Message-Id: <20210125015435.45979-1-trondmy@kernel.org>
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From: Trond Myklebust <trond.myklebust@hammerspace.com>

If the server returns a new stateid that does not match the one in our
cache, then pnfs_layout_process() will leak the layout segments returned
by pnfs_mark_layout_stateid_invalid().

Fixes: 9888d837f3cf ("pNFS: Force a retry of LAYOUTGET if the stateid doesn't match our cache")
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 fs/nfs/pnfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 4f274f21c4ab..e68e6f8cb407 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -2417,6 +2417,7 @@ pnfs_layout_process(struct nfs4_layoutget *lgp)
 	spin_unlock(&ino->i_lock);
 	lseg->pls_layout = lo;
 	NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg);
+	pnfs_free_lseg_list(&free_me);
 	return ERR_PTR(-EAGAIN);
 }
 
-- 
2.29.2