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authorJ. Bruce Fields <bfields@redhat.com>2016-09-21 03:55:36 +0300
committerJ. Bruce Fields <bfields@redhat.com>2016-09-26 22:20:38 +0300
commit7d22fc11c7edeeac6f1c3f1ae0edcef4de08c6e0 (patch)
tree51c6cdd75f7a6b424fc65cd8c72aec630c9746f5 /fs/nfsd
parentebd7c72c63acc3d00944c88cbf96143a8cae179f (diff)
downloadlinux-7d22fc11c7edeeac6f1c3f1ae0edcef4de08c6e0.tar.xz
nfsd4: setclientid_confirm with unmatched verifier should fail
A setclientid_confirm with (clientid, verifier) both matching an existing confirmed record is assumed to be a replay, but if the verifier doesn't match, it shouldn't be. This would be a very rare case, except that clients following https://tools.ietf.org/html/rfc7931#section-5.8 may depend on the failure. Reviewed-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Diffstat (limited to 'fs/nfsd')
-rw-r--r--fs/nfsd/nfs4state.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 4062f4fbfc6d..a0e5128ec539 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -3304,9 +3304,10 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp,
goto out;
/* cases below refer to rfc 3530 section 14.2.34: */
if (!unconf || !same_verf(&confirm, &unconf->cl_confirm)) {
- if (conf && !unconf) /* case 2: probable retransmit */
+ if (conf && same_verf(&confirm, &conf->cl_confirm)) {
+ /* case 2: probable retransmit */
status = nfs_ok;
- else /* case 4: client hasn't noticed we rebooted yet? */
+ } else /* case 4: client hasn't noticed we rebooted yet? */
status = nfserr_stale_clientid;
goto out;
}