| To: | Gerd Hoffmann <kraxel@xxxxxxx> |
|---|---|
| Subject: | Re: [Xen-devel] [BUG] double fault for sale ;) |
| From: | Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> |
| Date: | 2006年5月29日 16:06:24 +0100 |
| Cc: | Xen devel list <xen-devel@xxxxxxxxxxxxxxxxxxx> |
| Delivery-date: | 2006年5月29日 08:11:47 -0700 |
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On 29 May 2006, at 16:00, Gerd Hoffmann wrote:
Looks like a stack overflow, since the stack pointer is in an "even" page which is guard page when running a debug build of Xen. Maybe you could hack up some code to get a rough back trace (round the crashing stack pointer up to a page boundary then scan a whole page for text addresses)? Either need to fix some large stack frame or make the stack larger. Probably the former.I'm busy rewriting the domain builder code a bit, to restruct the code and make it better usable for other tasks than directly booting a domain. While testing these bits I trapped into that one: (XEN) CPU: 1 (XEN) EIP: e008:[<ff137512>] get_page_type+0x12/0x63d (XEN) EFLAGS: 00010296 (XEN) CR3: 00000000 (XEN) eax: 33030001 ebx: ff1c1080 ecx: ff1d4080 edx: ff1d4080 (XEN) esi: 0000001a edi: ffbf5fac ebp: ffbf502c esp: ffbf4f84 (XEN) ds: e010 es: e010 fs: 0000 gs: 0000 ss: e010 (XEN) ************************************ (XEN) CPU1 DOUBLE FAULT -- system shutdown (XEN) System needs manual reset. (XEN) ************************************ I think even Domain-0 shouldn't be able to crash xen like this, no?
-- Keir _______________________________________________ Xen-devel mailing list Xen-devel@xxxxxxxxxxxxxxxxxxx http://lists.xensource.com/xen-devel
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