[Xen-devel] Null pointer deference

[stevegt@xxxxxxxxxxxxx]

Hi All,

I seem to be able to reproduce a null pointer dereference and paging
request errors in 1.2.  Can anyone give me any pointers on tracking down
what is causing it?

This is with a 32Mb virtual domain, running debian woody, NFS root,
256Mb swap in a local VD, while running a process which builds openldap,
python2.2.3, and related packages.  I'm not sure which package, if any
in particular, is causing this; could be just anything that causes a
similar workload.  This particular set of messages appeared before the
virtual domain locked up during the openldap build...

Steve


DOM26: Unable to handle kernel paging request at virtual address
20000001
DOM26:  printing eip:
DOM26: c0007743
DOM26: *pde=00000000(00000000)
DOM26: Oops: 0000
DOM26: CPU:    0
DOM26: EIP:    0819:[<c0007743>]    Not tainted
DOM26: EFLAGS: 00010202
DOM26: eax: 00000001   ebx: 20000001   ecx: c0a79e6c   edx: c0a79e6c
DOM26: esi: c0a78000   edi: c0114254   ebp: c1e5f580   esp: c0a79ce4
DOM26: ds: 0821   es: 0821   ss: 0821
DOM26: Process sh (pid: 10086, stackpage=c0a79000)<1>
DOM26: Stack: 20000001 c0a78000 c002c728 c0a78000 c0a79db0 c0114254
ffffffb0 c0a78000
DOM26:        c003e789 c0a79e6c c014b5ac c003e314 c0a79e6c 00000000
c0114250 c0a79de8
DOM26:        c1419640 80000000 00000000 00000000 00000000 00000000
00000000 00000000
DOM26: Call Trace: [<c002c728>] [<c003e789>] [<c003e314>] [<c002ccc7>]
[<c002cf4a>]
DOM26:    [<c002cf61>] [<c0090033>] [<c00914bf>]
DOM26:
DOM26:  <1>Unable to handle kernel paging request at virtual address
20000001
DOM26:  printing eip:
DOM26: c000af0f
DOM26: *pde=00000000(00000000)
DOM26: Oops: 0002
DOM26: CPU:    0
DOM26: EIP:    0819:[<c000af0f>]    Not tainted
DOM26: EFLAGS: 00010282
DOM26: eax: 20000001   ebx: c1ed5b20   ecx: c0a78264   edx: c0a78264
DOM26: esi: 00000000   edi: 20000001   ebp: 0000000b   esp: c0a79bb4
DOM26: ds: 0821   es: 0821   ss: 0821
DOM26: Process sh (pid: 10086, stackpage=c0a79000)<1>
DOM26: Stack: c1ed5b20 00000000 c0a78000 0000000b 0000000b c000b55f
20000001 0000001f
DOM26:        00000000 c140d6c0 20000001 c0091a87 0000000b 00000000
c1ed5b3c c0096305
DOM26:        c0129928 c0a79cb0 00000000 c0a78000 00000000 20000001
c1e5f580 00000000
DOM26: Call Trace: [<c000b55f>] [<c0091a87>] [<c0096305>] [<c002eb19>]
[<c0018a25>]
DOM26:    [<c0018c46>] [<c0018feb>] [<c0018ed4>] [<c006e759>]
[<c0091768>] [<c0007743>]
DOM26:    [<c002c728>] [<c003e789>] [<c003e314>] [<c002ccc7>]
[<c002cf4a>] [<c002cf61>]
DOM26:    [<c0090033>] [<c00914bf>]
DOM26:
DOM26:  <1>Unable to handle kernel NULL pointer dereference at virtual
address 00000001
DOM26:  printing eip:
DOM26: c000b623
DOM26: *pde=00000000(00000000)
DOM26: Oops: 0002
DOM26: CPU:    0
DOM26: EIP:    0819:[<c000b623>]    Not tainted
DOM26: EFLAGS: 00010202
DOM26: eax: 00000000   ebx: 00000001   ecx: c0a78264   edx: c0a78264
DOM26: esi: 00000002   edi: c0a78000   ebp: 0000000b   esp: c0a79aa0
DOM26: ds: 0821   es: 0821   ss: 0821
DOM26: Process sh (pid: 10086, stackpage=c0a79000)<1>
DOM26: Stack: 0000001f 00000002 20000001 20000001 c0091a87 0000000b
00000000 00000002
DOM26:        c0096305 c0129928 c0a79b80 00000002 c0a78000 00000002
20000001 0000000b
DOM26:        63303039 c101fc58 c0a78000 00000002 c101fc58 ffffffff
00030001 c001e621
DOM26: Call Trace: [<c0091a87>] [<c0096305>] [<c001e621>] [<c001f6c0>]
[<c0008996>]
DOM26:    [<c00200d7>] [<c00204e1>] [<c001464d>] [<c0014c92>]
[<c0091768>] [<c000af0f>]
DOM26:    [<c000b55f>] [<c0091a87>] [<c0096305>] [<c002eb19>]
[<c0018a25>] [<c0018c46>]
DOM26:    [<c0018feb>] [<c0018ed4>] [<c006e759>] [<c0091768>]
[<c0007743>] [<c002c728>]
DOM26:    [<c003e789>] [<c003e314>] [<c002ccc7>] [<c002cf4a>]
[<c002cf61>] [<c0090033>]
DOM26:    [<c00914bf>]
DOM26:



-- 
Stephen G. Traugott  (KG6HDQ)
UNIX/Linux Infrastructure Architect, TerraLuna LLC
stevegt@xxxxxxxxxxxxx 
http://www.stevegt.com -- http://Infrastructures.Org 


-------------------------------------------------------
The SF.Net email is sponsored by EclipseCon 2004
Premiere Conference on Open Tools Development and Integration
See the breadth of Eclipse activity. February 3-5 in Anaheim, CA.
http://www.eclipsecon.org/osdn
_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxxxx
https://lists.sourceforge.net/lists/listinfo/xen-devel