[Xen-changelog] [xen-unstable] libvchan: fix segfault in client error path

[Xen patchbot-unstable <patchbot@xxxxxxx>]

# HG changeset patch
# User Anil Madhavapeddy <anil@xxxxxxxxxx>
# Date 1322161795 0
# Node ID 1d78b89475ecf4867875e191ba92425bab1f4670
# Parent  05dd94652d8dbe1d7d0232328bea50fefaad57a9
libvchan: fix segfault in client error path

In libvchan_client_init, go to the error path if the gntdev device is
not available.  Otherwise, a segfault happens later as the vchan
context is invalid.

Signed-off-by: Anil Madhavapeddy <anil@xxxxxxxxxx>
Committed-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
---


diff -r 05dd94652d8d -r 1d78b89475ec tools/libvchan/init.c
--- a/tools/libvchan/init.c     Thu Nov 24 19:00:25 2011 +0000
+++ b/tools/libvchan/init.c     Thu Nov 24 19:09:55 2011 +0000
@@ -385,7 +385,7 @@
 
        ctrl->gnttab = xc_gnttab_open(logger, 0);
        if (!ctrl->gnttab)
-               goto out;
+               goto fail;
 
 // set up event channel
        if (init_evt_cli(ctrl, domain, logger))

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