[3.19.y-ckt stable] Patch "9p: forgetting to cancel request on interrupted zero-copy RPC" has been added to staging queue
Kamal Mostafa
kamal at canonical.com
Thu Jul 16 01:07:05 UTC 2015
This is a note to let you know that I have just added a patch titled
9p: forgetting to cancel request on interrupted zero-copy RPC
to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree
which can be found at:
http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue
This patch is scheduled to be released in version 3.19.y-ckt4.
If you, or anyone else, feels it should not be added to this tree, please
reply to this email.
For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable
Thanks.
-Kamal
------
>From 1947d7d036c89b71afb8b7dcf59941865258975f Mon Sep 17 00:00:00 2001
From: Al Viro <viro at zeniv.linux.org.uk>
Date: Sat, 4 Jul 2015 16:04:19 -0400
Subject: 9p: forgetting to cancel request on interrupted zero-copy RPC
commit a84b69cb6e0a41e86bc593904faa6def3b957343 upstream.
If we'd already sent a request and decide to abort it, we *must*
issue TFLUSH properly and not just blindly reuse the tag, or
we'll get seriously screwed when response eventually arrives
and we confuse it for response to later request that had reused
the same tag.
Signed-off-by: Al Viro <viro at zeniv.linux.org.uk>
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
net/9p/client.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/9p/client.c b/net/9p/client.c
index e86a9be..53fe98e 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -850,7 +850,8 @@ static struct p9_req_t *p9_client_zc_rpc(struct p9_client *c, int8_t type,
if (err < 0) {
if (err == -EIO)
c->status = Disconnected;
- goto reterr;
+ if (err != -ERESTARTSYS)
+ goto reterr;
}
if (req->status == REQ_STATUS_ERROR) {
p9_debug(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err);
--
1.9.1
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