[PATCH 5.4 42/61] pNFS/NFSv4: Fix a layout segment leak in pnfs_layout_process()

[Greg Kroah-Hartman]

From: Trond Myklebust <trond.mykleb...@hammerspace.com>

[ Upstream commit 814b84971388cd5fb182f2e914265b3827758455 ]

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.mykleb...@hammerspace.com>
Signed-off-by: Sasha Levin <sas...@kernel.org>
---
 fs/nfs/pnfs.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 4232f956bdac0..ca1d98f274d12 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -2388,6 +2388,7 @@ out_forget:
        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);
 }
 
-- 
2.27.0