From b2c88ca65ac829a9570a491bcf1b78f07b1e3841 Mon Sep 17 00:00:00 2001 From: Chuck Lever Date: Sun, 8 Jan 2023 11:29:57 -0500 Subject: [PATCH] SUNRPC: Use xdr_stream to encode Reply verifier in svcauth_null_accept() Done as part of hardening the server-side RPC header encoding path. Reviewed-by: Jeff Layton Signed-off-by: Chuck Lever --- net/sunrpc/svcauth_unix.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) diff --git a/net/sunrpc/svcauth_unix.c b/net/sunrpc/svcauth_unix.c index 6281d23..b24d6c7 100644 --- a/net/sunrpc/svcauth_unix.c +++ b/net/sunrpc/svcauth_unix.c @@ -744,7 +744,6 @@ EXPORT_SYMBOL_GPL(svcauth_unix_set_client); static int svcauth_null_accept(struct svc_rqst *rqstp) { - struct kvec *resv = &rqstp->rq_res.head[0]; struct xdr_stream *xdr = &rqstp->rq_arg_stream; struct svc_cred *cred = &rqstp->rq_cred; u32 flavor, len; @@ -773,12 +772,12 @@ svcauth_null_accept(struct svc_rqst *rqstp) if (cred->cr_group_info == NULL) return SVC_CLOSE; /* kmalloc failure - client must retry */ - /* Put NULL verifier */ - svc_putnl(resv, RPC_AUTH_NULL); - svc_putnl(resv, 0); + svcxdr_init_encode(rqstp); + if (xdr_stream_encode_opaque_auth(&rqstp->rq_res_stream, + RPC_AUTH_NULL, NULL, 0) < 0) + return SVC_CLOSE; rqstp->rq_cred.cr_flavor = RPC_AUTH_NULL; - svcxdr_init_encode(rqstp); return SVC_OK; } -- 2.7.4