From 9e703fd22bec87b54b5408c8c5559276b36eda61 Mon Sep 17 00:00:00 2001 From: Ian Jackson Date: Tue, 3 May 2016 15:52:53 +0100 Subject: [PATCH 09/34] libxl: Do not trust frontend for nic in libxl_devid_to_device_nic Find the backend by reading the pointer in /libxl rather than in the guest's frontend area. This is part of XSA-175. Signed-off-by: Ian Jackson Reviewed-by: Wei Liu --- tools/libxl/libxl.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/tools/libxl/libxl.c b/tools/libxl/libxl.c index 8c9cab1..1ad4536 100644 --- a/tools/libxl/libxl.c +++ b/tools/libxl/libxl.c @@ -3628,16 +3628,16 @@ int libxl_devid_to_device_nic(libxl_ctx *ctx, uint32_t domid, int devid, libxl_device_nic *nic) { GC_INIT(ctx); - char *dompath, *path; + char *libxl_dom_path, *path; int rc = ERROR_FAIL; libxl_device_nic_init(nic); - dompath = libxl__xs_get_dompath(gc, domid); - if (!dompath) + libxl_dom_path = libxl__xs_libxl_path(gc, domid); + if (!libxl_dom_path) goto out; path = libxl__xs_read(gc, XBT_NULL, - GCSPRINTF("%s/device/vif/%d/backend", dompath, + GCSPRINTF("%s/device/vif/%d/backend", libxl_dom_path, devid)); if (!path) goto out; -- 2.1.4