| From | Greg Kroah-Hartman <> | Subject | [PATCH 4.7 095/141] svc: Avoid garbage replies when pc_func() returns rpc_drop_reply | Date | Thu, 6 Oct 2016 10:28:51 +0200 |
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4.7-stable review patch. If anyone has any objections, please let me know.
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From: Chuck Lever <chuck.lever@oracle.com>
commit 0533b13072f4bf35738290d2cf9e299c7bc6c42a upstream.
If an RPC program does not set vs_dispatch and pc_func() returns rpc_drop_reply, the server sends a reply anyway containing a single word containing the value RPC_DROP_REPLY (in network byte-order, of course). This is a nonsense RPC message.
Fixes: 9e701c610923 ("svcrpc: simpler request dropping") Signed-off-by: Chuck Lever <chuck.lever@oracle.com> Tested-by: Steve Wise <swise@opengridcomputing.com> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
--- net/sunrpc/svc.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-)
--- a/net/sunrpc/svc.c +++ b/net/sunrpc/svc.c @@ -1188,7 +1188,8 @@ svc_process_common(struct svc_rqst *rqst *statp = procp->pc_func(rqstp, rqstp->rq_argp, rqstp->rq_resp); /* Encode reply */ - if (test_bit(RQ_DROPME, &rqstp->rq_flags)) { + if (*statp == rpc_drop_reply || + test_bit(RQ_DROPME, &rqstp->rq_flags)) { if (procp->pc_release) procp->pc_release(rqstp, NULL, rqstp->rq_resp); goto dropit;
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