This is a note to let you know that I've just added the patch titled
svc: Avoid garbage replies when pc_func() returns rpc_drop_reply
to the 4.7-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
svc-avoid-garbage-replies-when-pc_func-returns-rpc_drop_reply.patch
and it can be found in the queue-4.7 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 0533b13072f4bf35738290d2cf9e299c7bc6c42a Mon Sep 17 00:00:00 2001
From: Chuck Lever <chuck.lever@xxxxxxxxxx>
Date: Wed, 29 Jun 2016 13:55:14 -0400
Subject: svc: Avoid garbage replies when pc_func() returns rpc_drop_reply
From: Chuck Lever <chuck.lever@xxxxxxxxxx>
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@xxxxxxxxxx>
Tested-by: Steve Wise <swise@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Anna Schumaker <Anna.Schumaker@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
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;
Patches currently in stable-queue which might be from chuck.lever@xxxxxxxxxx are
queue-4.7/xprtrdma-remove-fmrs-from-the-unmap-list-after-unmapping.patch
queue-4.7/svc-avoid-garbage-replies-when-pc_func-returns-rpc_drop_reply.patch
queue-4.7/nfs-don-t-drop-cb-requests-with-invalid-principals.patch
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