[Xen-devel] [PATCH] xc_ptrace.c fix

[Kip Macy <kip.macy@xxxxxxxxx>]

Could you please apply the following trivial patch (yes I know, gmail
screws up whitespace). It fixes a crash in the gdbserver that can be
hit when debugging linux.


--- a/tools/libxc/xc_ptrace.c   Fri Jul  1 21:25:45 2005
+++ b/tools/libxc/xc_ptrace.c   Sun Jul  3 01:05:21 2005
@@ -200,7 +200,7 @@
                                             pde_phys[cpu] >>
PAGE_SHIFT)) == NULL)
            goto error_out;
     }
-    if ((page = pde_virt[cpu][vtopti(va)]) == 0) /* logical address */
+    if ((pde_virt[cpu] == NULL) || (page = pde_virt[cpu][vtopti(va)])
== 0) /* logical address */
        goto error_out;
     if (ctxt[cpu].flags & VGCF_VMX_GUEST)
         page = page_array[page >> PAGE_SHIFT] << PAGE_SHIFT;

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