Re: oops in mm/memory.c remap_page_range() in 2.2.20

Greg KH (greg@kroah.com)
Fri, 21 Dec 2001 09:16:46 -0800


On Fri, Dec 21, 2001 at 09:05:11AM -0800, Greg KH wrote:
> Running "cvs update" on a 2.2.20 kernel with 16Mb of real memory I got
> the following oops:

Sorry, had /boot/System.map pointing to the wrong place, this is the
correct symbols:

Warning (compare_maps): ksyms_base symbol module_list_R__ver_module_list not found in System.map. Ignoring ksyms_base entry
Unable to handle kernel NULL pointer dereference at virtual address 00000002
current->tss.cr3 = 00f53000, %cr3 = 00f53000
*pde = 00000000
Oops: 0000
CPU: 0
EIP: 0010:[<c01194a0>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010296
eax: 00000002 ebx: c0fe4f50 ecx: 00000000 edx: c0229ff8
esi: 00000000 edi: c0fe4f50 ebp: 00000002 esp: c0805f04
ds: 0018 es: 0018 ss: 0018
Process cvs (pid: 21185, process nr: 44, stackpage=c0805000)
Stack: c0fe4f50 00000000 c0fe4fcc c011956f 00000002 00000000 c0804000 c0fe4f9c
c012247e c0fe4f50 00000000 00000000 c0fe4f50 00000243 c0ebd200 00000000
00000048 c0fe4f50 00000243 00000000 3c2367de 3c2367de 3c2367de 00000006
Call Trace: [<c011956f>] [<c012247e>] [<c012aa62>] [<c0122ea4>] [<c01230ea>] [<c01079c4>]
Code: 8b 4d 00 89 4c 24 10 8b 5d 04 8b 75 08 29 de 8b 55 2c 3b 54

>>EIP; c01194a0 <vmtruncate_list+c/a8> <=====
Trace; c011956f <vmtruncate+33/3c>
Trace; c012247e <do_truncate+66/9c>
Trace; c012aa62 <open_namei+2be/2ec>
Trace; c0122ea4 <filp_open+44/f0>
Trace; c01230ea <sys_open+36/94>
Trace; c01079c4 <system_call+34/38>
Code; c01194a0 <vmtruncate_list+c/a8>
00000000 <_EIP>:
Code; c01194a0 <vmtruncate_list+c/a8> <=====
0: 8b 4d 00 mov 0x0(%ebp),%ecx <=====
Code; c01194a3 <vmtruncate_list+f/a8>
3: 89 4c 24 10 mov %ecx,0x10(%esp,1)
Code; c01194a7 <vmtruncate_list+13/a8>
7: 8b 5d 04 mov 0x4(%ebp),%ebx
Code; c01194aa <vmtruncate_list+16/a8>
a: 8b 75 08 mov 0x8(%ebp),%esi
Code; c01194ad <vmtruncate_list+19/a8>
d: 29 de sub %ebx,%esi
Code; c01194af <vmtruncate_list+1b/a8>
f: 8b 55 2c mov 0x2c(%ebp),%edx
Code; c01194b2 <vmtruncate_list+1e/a8>
12: 3b 54 00 00 cmp 0x0(%eax,%eax,1),%edx

greg k-h
-
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