[Xen-devel] [PATCH]: xl, fix segfault when detaching non-existant disk

[Gianni Tedesco <gianni.tedesco@xxxxxxxxxx>]

Signed-off-by: Gianni Tedesco <gianni.tedesco@xxxxxxxxxx>

diff -r ac7e4c6ec6c7 tools/libxl/libxl_utils.c
--- a/tools/libxl/libxl_utils.c Fri Jul 23 19:23:49 2010 +0100
+++ b/tools/libxl/libxl_utils.c Mon Jul 26 18:23:42 2010 +0100
@@ -451,6 +451,8 @@ int libxl_devid_to_device_disk(struct li
     }
 
     val = libxl_xs_read(ctx, XBT_NULL, libxl_sprintf(ctx, "%s/backend-id", 
diskpath));
+    if (!val)
+        return ERROR_FAIL;
     disk->backend_domid = strtoul(val, NULL, 10);
     disk->domid = domid;
     be_path = libxl_xs_read(ctx, XBT_NULL, libxl_sprintf(ctx, "%s/backend", 
diskpath));



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