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Re: [Xen-devel] (XEN) domain_crash_sync called from entry.S (ff158e99)

To: Ian Pratt <m+Ian.Pratt@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] (XEN) domain_crash_sync called from entry.S (ff158e99)
From: Nivedita Singhvi <niv@xxxxxxxxxx>
Date: Wed, 12 Apr 2006 18:31:24 -0700
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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Ian Pratt wrote:
Have you a recipe for reproducing? We haven't seen this.

Ian, we had also seen this running xm-test on a SMP box,
01_migrate_localhost_pos in particular. I think this has
been fixed in tree, though (4/6). Haven't confirmed.

Christopher, you might want to upgrade the domU kernel, too.


-----Original Message-----
From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Christopher S. Aker
Sent: 11 April 2006 20:43
To: xen-devel
Subject: [Xen-devel] (XEN) domain_crash_sync called from entry.S (ff158e99)

Xen/xen0 as of Sun Apr 9 18:23:16 2006 +0100 9591:81bc9e9fb40d. The domU kernel is a few days previous to that -- after all of Keir's xvf kthread updates.

(XEN) domain_crash_sync called from entry.S (ff158e99)
(XEN) Domain 51 (vcpu#1) crashed on cpu#0:
(XEN) ----[ Xen-3.0-unstable    Not tainted ]----
(XEN) CPU:    0
(XEN) EIP:    0061:[<c0111df0>]
(XEN) EFLAGS: 00010292   CONTEXT: guest
(XEN) eax: 00000000   ebx: 01649000   ecx: 7ffdf061   edx: 80000000
(XEN) esi: 00000001   edi: c6087030   ebp: c0867fb4   esp: c0867f24
(XEN) cr0: 8005003b   cr3: 7fc81000
(XEN) ds: 007b   es: 007b   fs: 0000   gs: 0000   ss: 0069   cs: 0061
(XEN) Guest stack trace from esp=c0867f24:
(XEN) c0866000 c69dd900 c0111e80 c69dd900 c0468438 c69dd900 c01051fa 00000001 (XEN) c0866000 012193bf 00000000 c0866000 c0866000 00476385 00000000 c011fd55 (XEN) c253267c c2532550 c110a240 f88990d7 00005409 c0866000 f8528476 00005409 (XEN) c69dd580 c0867f9c b7ec2ff4 bfe21920 00000000 c0866000 c0102e47 00000011 (XEN) bfe218fc b7ec2ff4 f578d040 00000000 c0866000 c01051fa b7ec2ff4 00000000 (XEN) 00000000 bfe21920 00000000 bfe21908 000016c2 0000007b 0000007b 00000002 (XEN) b7e366d8 00000073 00000246 bfe218fc 0000007b 2507f000 b7d2115d

...then, very shortly after, in dom0...

Unable to handle kernel NULL pointer dereference at virtual address 00000004
 printing eip:
07fb5000 -> *pde = 00000001:e33ff001
077ba000 -> *pme = 00000000:00000000
Oops: 0002 [#1]
Modules linked in:
CPU:    0
EIP:    0061:[<c0161655>]    Not tainted VLI
EFLAGS: 00010046   (2.6.16-xen0 #1)
EIP is at cache_alloc_refill+0x185/0x560
eax: c065ed80   ebx: ffffffff   ecx: 00000010   edx: 00000000
esi: c7ac5040   edi: 00000002   ebp: c067ee80   esp: c7a75e94
ds: 007b   es: 007b   ss: 0069
Process li-statusd.pl (pid: 24459, threadinfo=c7a74000 task=cdc9e030)
Stack: <0>c011bfe2 c0673d40 000000d0 000000d0 00000001 000000d0 c0673dc0 c0672c00
       c065ed80 00000020 c95f6240 c7a74000 c95f6240 c7ac505c 00000001
00000000 ceb0ea84 c696d030 c01614c7 fffffff4 ca164a84 c011d5cc c0673dc0 Call Trace:
 [<c011bfe2>] dup_fd+0xc2/0x3b0
 [<c01614c7>] kmem_cache_alloc+0x77/0x80
 [<c011d5cc>] copy_process+0xa5c/0x1220
 [<c0164a9c>] fd_install+0x2c/0x60
 [<c011de00>] do_fork+0x70/0x200
 [<c0102e47>] sys_fork+0x37/0x40
 [<c0105121>] syscall_call+0x7/0xb
Code: 56 0c 8b 3c b8 89 7e 14 89 54 8d 14 41 89 4d 00 8b 44 24 18 8b 7e 10 3b 78 38 0f 83 3a ff ff ff 4b 83 fb ff 75 c0 8b 16 8b 46 04 <89> 42
04 89 10 83 7e 14 ff c7 06 00 01 10 00 c7 46 04 00 02 20


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