From: Trond Myklebust <trond.myklebust@hammerspace.com>
Date: Thu, 21 Jan 2021 16:34:37 -0500
Subject: [PATCH] pNFS/NFSv4: Fix a layout segment leak in
 pnfs_layout_process()
Git-commit: 814b84971388cd5fb182f2e914265b3827758455
Patch-mainline: v5.11
References: git-fixes

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>
Acked-by: NeilBrown <neilb@suse.com>

---
 fs/nfs/pnfs.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -2031,6 +2031,7 @@ out_forget:
 	NFS_SERVER(ino)->pnfs_curr_ld->free_lseg(lseg);
 	if (!pnfs_layout_is_valid(lo))
 		nfs_commit_inode(ino, 0);
+	pnfs_free_lseg_list(&free_me);
 	return ERR_PTR(-EAGAIN);
 }