[PATCH] pNFS: Fix NULL dereference in pnfs_generic_alloc_ds_commits

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From: Fred Isaman <fred.isaman@xxxxxxxxx>

Signed-off-by: Fred Isaman <fred.isaman@xxxxxxxxx>
Signed-off-by: Trond Myklebust <trond.myklebust@xxxxxxxxxxxxxxx>
---
 fs/nfs/pnfs_nfs.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c
index ae600ab1a646..d40755a0984b 100644
--- a/fs/nfs/pnfs_nfs.c
+++ b/fs/nfs/pnfs_nfs.c
@@ -221,7 +221,7 @@ pnfs_generic_alloc_ds_commits(struct nfs_commit_info *cinfo,
 		 * If the layout segment is invalid, then let
 		 * pnfs_generic_retry_commit() clean up the bucket.
 		 */
-		if (!pnfs_is_valid_lseg(bucket->clseg) &&
+		if (bucket->clseg && !pnfs_is_valid_lseg(bucket->clseg) &&
 		    !test_bit(NFS_LSEG_LAYOUTRETURN, &bucket->clseg->pls_flags))
 			break;
 		data = nfs_commitdata_alloc(false);
-- 
2.9.3

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