When the client sends an OPEN with claim type CLAIM_DELEG_CUR_FH or
CLAIM_DELEGATION_CUR, the delegation stateid and the file handle
must belongs to the same file, otherwise return NFS4ERR_BAD_STATEID.
Signed-off-by: Dai Ngo <dai.ngo@xxxxxxxxxx>
---
fs/nfsd/nfs4state.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 59a693f22452..be2ee641a22d 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -6318,6 +6318,11 @@ nfsd4_process_open2(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nf
status = nfs4_check_deleg(cl, open, &dp);
if (status)
goto out;
+ if (dp && nfsd4_is_deleg_cur(open) &&
+ (dp->dl_stid.sc_file != fp)) {
+ status = nfserr_bad_stateid;
+ goto out;
+ }
stp = nfsd4_find_and_lock_existing_open(fp, open);
} else {
open->op_file = NULL;
--
2.43.5
