[Crash-utility] vmlist initialize fix
Hi Dave,
Crash was stopped with following messages when I try to treat very small
dump image.
It was caused in vmalloc_start initialise when vmalloc is not used
(vmlist == 0). This patch return address 0 for this case.
<readmem: c02a99a8, KVADDR, "vmlist", 4, (FOE),
afdae5f4>
<readmem: 0, KVADDR, "first vmlist addr", 4, (ROE), afdae5f0>
crash: invalid kernel virtual address: 0 type: "first vmlist addr"
regards,
--
Kazuo Moriwaka <moriwaka(a)valinux.co.jp>
--- crash-4.0-2.31.orig/memory.c 2006-06-27 23:15:32.000000000 +0900
+++ crash-4.0-2.31/memory.c 2006-07-10 18:24:54.000000000 +0900
@@ -11049,10 +11049,13 @@
ulong vmlist, addr;
get_symbol_data("vmlist", sizeof(void *), &vmlist);
-
- if (!readmem(vmlist+OFFSET(vm_struct_addr), KVADDR, &addr,
- sizeof(void *), "first vmlist addr", RETURN_ON_ERROR))
- non_matching_kernel();
+ if (vmlist != 0x0) {
+ if (!readmem(vmlist+OFFSET(vm_struct_addr), KVADDR, &addr,
+ sizeof(void *), "first vmlist addr", RETURN_ON_ERROR))
+ non_matching_kernel();
+ } else {
+ addr = 0;
+ }
return addr;
}