[Xen-bugs] [Bug 251] New: Oops on boot

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=251

           Summary: Oops on boot
           Product: Xen
           Version: unstable
          Platform: All
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: pl@xxxxxxxxxx
                CC: hohnbaum@xxxxxxxxxx


System Info:
# xm info
system                 : Linux
host                   : bl3-3
release                : 2.6.12-xen0
version                : #1 Thu Sep 22 03:10:41 CDT 2005
machine                : i686
nr_cpus                : 4
nr_nodes               : 1
sockets_per_node       : 2
cores_per_socket       : 1
threads_per_core       : 2
cpu_mhz                : 3065
hw_caps                : bfebfbff:00000000:00000000:00000080:00004400
memory                 : 1023
free_memory            : 622
xen_major              : 3
xen_minor              : 0
xen_extra              : -devel
xen_caps               : xen_3.0_x86_32
xen_params             : virt_start=0xfc000000
xen_changeset          : Wed Sep 21 17:41:34 2005 +0100 a32ee93b3b33
cc_compiler            : gcc version 3.3.3 (SuSE Linux)
cc_compile_by          : root
cc_compile_domain      : ltc.austin.ibm.com
cc_compile_date        : Thu Sep 22 03:16:43 CDT 2005

Current changeset is:
changeset:   6988:a32ee93b3b336ce864e8fa28ca4bb5c001b7dfaf
tag:         tip
user:        jbulpin@xxxxxxxxxxxxxxxxxxxxxxx
date:        Wed Sep 21 17:41:34 2005
summary:     Trivial spelling mistake fix.

Here's the oops I get at boot time (non-fatal):
Unable to handle kernel NULL pointer dereference at virtual address 0000001c
 printing eip:
c0155836
*pde = ma 00000000 pa 55555000
Oops: 0000 [#1]
PREEMPT
Modules linked in: thermal processor fan button battery ac sworks_agp agpgart
CPU:    0
EIP:    0061:[<c0155836>]    Not tainted VLI
EFLAGS: 00010207   (2.6.12-xen0)
EIP is at generic_page_range+0x26/0x170
eax: d0a49000   ebx: 00000000   ecx: d0a48000   edx: 00000342
esi: 00000001   edi: 00000001   ebp: ce5df668   esp: ce5df614
ds: 007b   es: 007b   ss: 0069
Process kxbwatch (pid: 10109, threadinfo=ce5de000 task=cfa950a0)
Stack: 00000000 00000000 00000000 00000000 b7f1f3f5 b7f1f3f3 d0a49000 ce5df668
       00000001 00000001 ce5df668 c0118263 00000000 d0a48000 00001000 c01180b0
       ce5df664 00000000 ce5df678 00001000 ce5df668 00000000 b7f1f393 0dc67063
Call Trace:
 [<c0118263>] __direct_remap_pfn_range+0x143/0x180
 [<c01180b0>] direct_remap_area_pte_fn+0x0/0x70
 [<c031dd10>] dma_timer_expiry+0x0/0x80
 [<c031fd69>] ide_disk_get+0x29/0x40
 [<c0322128>] idedisk_open+0x28/0xc0
 [<c027cb6f>] exact_lock+0xf/0x20
 [<c02741a9>] kobj_lookup+0x119/0x1f0
 [<c027cb50>] exact_match+0x0/0x10
 [<c0225832>] sub_alloc+0x62/0x180
 [<c02ffb09>] touch_fn+0x9/0x50
 [<c0134581>] search_exception_tables+0x21/0x40
 [<c02ffb09>] touch_fn+0x9/0x50
 [<c0119833>] fixup_exception+0x13/0x30
 [<c02ffb09>] touch_fn+0x9/0x50
 [<c0117d3c>] do_page_fault+0x34c/0x631
 [<c0302984>] xs_input_avail+0x34/0x50
 [<c0302b55>] xb_read+0x1b5/0x200
 [<c010946e>] page_fault+0x2e/0x34
 [<c0471fd9>] iret_exc+0xf2f/0x3cb5
 [<c01558e7>] generic_page_range+0xd7/0x170
 [<c030901e>] map_frontend_pages+0x4e/0xa0
 [<c03090dc>] netif_map+0x5c/0x150
 [<c0308807>] frontend_changed+0x1e7/0x280
 [<c0303c10>] watch_thread+0x0/0x190
 [<c0303d18>] watch_thread+0x108/0x190
 [<c0138360>] autoremove_wake_function+0x0/0x60
 [<c0138360>] autoremove_wake_function+0x0/0x60
 [<c046f7a9>] preempt_schedule+0x49/0x70
 [<c0137c8d>] kthread+0xad/0xf0
 [<c0137be0>] kthread+0x0/0xf0
 [<c0106e55>] kernel_thread_helper+0x5/0x10
Code: 9f 31 00 eb b7 55 57 56 53 83 ec 1c 8b 4c 24 34 8b 44 24 38 01 c8 39 c1 89
44 24 18 0f 83 10 01 00 00 8b 5c 24 30 89 ca c1 ea 16 <8b> 43 1c 8d 2c 90 b8 00
e0 ff ff 21 e0 ff 40 14 8b 44 24 18 48

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