[Xen-changelog] [xen stable-4.6] libxl: Do not trust backend in nic getinfo

[patchbot@xxxxxxx]

commit ad5d30e886215c843820dc326e8f1daec7c44a34
Author:     Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
AuthorDate: Tue May 3 16:35:21 2016 +0100
Commit:     Ian Jackson <Ian.Jackson@xxxxxxxxxxxxx>
CommitDate: Mon Jun 6 15:07:36 2016 +0100

    libxl: Do not trust backend in nic getinfo
    
    This is part of XSA-178.
    
    Signed-off-by: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
    Reviewed-by: Wei Liu <wei.liu2@xxxxxxxxxx>
---
 tools/libxl/libxl.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c
index 397c7e8..c255837 100644
--- a/tools/libxl/libxl.c
+++ b/tools/libxl/libxl.c
@@ -3636,10 +3636,8 @@ int libxl_device_nic_getinfo(libxl_ctx *ctx, uint32_t 
domid,
     nicinfo->rref_tx = val ? strtoul(val, NULL, 10) : -1;
     val = libxl__xs_read(gc, XBT_NULL, libxl__sprintf(gc, "%s/rx-ring-ref", 
nicpath));
     nicinfo->rref_rx = val ? strtoul(val, NULL, 10) : -1;
-    nicinfo->frontend = xs_read(ctx->xsh, XBT_NULL,
-                                 libxl__sprintf(gc, "%s/frontend", 
nicinfo->backend), NULL);
-    val = libxl__xs_read(gc, XBT_NULL, libxl__sprintf(gc, "%s/frontend-id", 
nicinfo->backend));
-    nicinfo->frontend_id = val ? strtoul(val, NULL, 10) : -1;
+    nicinfo->frontend = libxl__strdup(NOGC, nicpath);
+    nicinfo->frontend_id = domid;
 
     rc = 0;
  out:
--
generated by git-patchbot for /home/xen/git/xen.git#stable-4.6

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