9p: trans_fd, bail out if recv fcall if missing

req->rc is pre-allocated early on with p9_tag_alloc and shouldn't be missing

Signed-off-by: Dominique Martinet <dominique.martinet@cea.fr>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

diff --git a/net/9p/trans_fd.c b/net/9p/trans_fd.c
index a270dcc4ad9a93204ef344ffe8ddcf0369819eb5..7bc2208b6cc4c445286c20e01d9911ac9e75b9b2 100644 (file)
--- a/net/9p/trans_fd.c
+++ b/net/9p/trans_fd.c
@@ -356,13 +356,12 @@ static void p9_read_work(struct work_struct *work)
                }
 
                if (m->req->rc == NULL) {
-                       m->req->rc = kmalloc(sizeof(struct p9_fcall) +
-                                               m->client->msize, GFP_NOFS);
-                       if (!m->req->rc) {
-                               m->req = NULL;
-                               err = -ENOMEM;
-                               goto error;
-                       }
+                       p9_debug(P9_DEBUG_ERROR,
+                                "No recv fcall for tag %d (req %p), disconnecting!\n",
+                                m->rc.tag, m->req);
+                       m->req = NULL;
+                       err = -EIO;
+                       goto error;
                }
                m->rc.sdata = (char *)m->req->rc + sizeof(struct p9_fcall);
                memcpy(m->rc.sdata, m->tmp_buf, m->rc.capacity);