From c45a8130fdee875c9d7b25ba50864aae1a1dafa3 Mon Sep 17 00:00:00 2001 From: Al Viro Date: Sat, 4 Jul 2015 16:04:19 -0400 Subject: [PATCH] 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 Signed-off-by: Ben Hutchings --- 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 854ca7a911c4..e95817801fc7 100644 --- a/net/9p/client.c +++ b/net/9p/client.c @@ -824,7 +824,8 @@ 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_DPRINTK(P9_DEBUG_ERROR, "req_status error %d\n", req->t_err); -- 2.39.5