[Xen-changelog] [xen stable-4.4] libxl: Do not trust frontend in libxl__device_nextid

[patchbot@xxxxxxx]

commit 0b5c527d576ecf2415e1f5270ca3e3e720d82218
Author:     Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
AuthorDate: Wed May 4 15:30:32 2016 +0100
Commit:     Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
CommitDate: Mon Jun 6 15:54:27 2016 +0100

    libxl: Do not trust frontend in libxl__device_nextid
    
    When selecting the devid for a new device, we should look in
    /libxl/device for existing devices, not in the frontend area.
    
    This is part of XSA-175.
    
    Signed-off-by: Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
    Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 tools/libxl/libxl.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index e2a5be3..b52e63e 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -1743,15 +1743,16 @@ out:
 /* common function to get next device id */
 static int libxl__device_nextid(libxl__gc *gc, uint32_t domid, char *device)
 {
-    char *dompath, **l;
+    char *libxl_dom_path, **l;
     unsigned int nb;
     int nextid = -1;
 
-    if (!(dompath = libxl__xs_get_dompath(gc, domid)))
+    if (!(libxl_dom_path = libxl__xs_libxl_path(gc, domid)))
         return nextid;
 
     l = libxl__xs_directory(gc, XBT_NULL,
-                            GCSPRINTF("%s/device/%s", dompath, device), &nb);
+        GCSPRINTF("%s/device/%s", libxl_dom_path, device),
+                            &nb);
     if (l == NULL || nb == 0)
         nextid = 0;
     else
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.4

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