kernel BUG at slab.c:1244! (and slab.c:580)

kernel BUG at slab.c:1244! (and slab.c:580)

[David Ford]

Hrm.  Third time I've reported this, it's happened since the early 2.4 
kernels and I can get at least one every day or so.  The odd thing is 
that the first oops normally happens within a couple hours after boot 
but it may take weeks before another oops will happen.  The oops always 
has a trace similar to below.  The second oops is new to me, it happened 
last night and I haven't seen it before, culled from syslog.

# uname -r
2.4.5-ac15

invalid operand: 0000
CPU:    0
EIP:    0010:[<c0126223>]
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010082
eax: 0000001b   ebx: c13bf768   ecx: c033e280   edx: 0000285e
esi: cca5d000   edi: 00001000   ebp: 00000246   esp: c9df3de8
ds: 0018   es: 0018   ss: 0018
Process postmaster (pid: 17971, stackpage=c9df3000)
Stack: c02be985 000004dc ca20e604 c03cffc0 00000007 00000002 00001000 
cca5d000
       c025ad46 00000dbc 00000007 cae69820 00000000 c9df2000 c025a560 
00000d80
       00000007 c9df3e98 00000d66 cae68834 ca6dfe94 c02a909a cae69820 
00000d66
Call Trace: [<c025ad46>] [<c025a560>] [<c02a909a>] [<c0258424>] 
[<c025907e>]
   [<c01109f8>] [<c0110b5b>] [<c01109f8>] [<c0121e49>] [<c02590b5>] 
[<c025980b>]
 
   [<c0107a6d>] [<c0106ac7>]
Code: 0f 0b 83 c4 08 f6 43 11 04 74 55 b8 a5 c2 0f 17 87 46 00 3d

 >>EIP; c0126223 <kmalloc+123/1bc>   <=====
Trace; c025ad46 <alloc_skb+da/18c>
Trace; c025a560 <sock_alloc_send_skb+64/e8>
Trace; c02a909a <unix_stream_sendmsg+102/2ec>
Trace; c0258424 <sock_sendmsg+68/88>
Trace; c025907e <sys_sendto+c6/e4>
Trace; c01109f8 <do_page_fault+0/454>
Trace; c0110b5b <do_page_fault+163/454>
Trace; c01109f8 <do_page_fault+0/454>
Trace; c0121e49 <generic_file_read+61/7c>
Trace; c02590b5 <sys_send+19/20>
Trace; c025980b <sys_socketcall+103/1bc>
Trace; c0107a6d <math_state_restore+19/34>
Trace; c0106ac7 <system_call+37/40>
Code;  c0126223 <kmalloc+123/1bc>
00000000 <_EIP>:
Code;  c0126223 <kmalloc+123/1bc>   <=====
   0:   0f 0b                     ud2a      <=====
Code;  c0126225 <kmalloc+125/1bc>
   2:   83 c4 08                  add    $0x8,%esp
Code;  c0126228 <kmalloc+128/1bc>
   5:   f6 43 11 04               testb  $0x4,0x11(%ebx)
Code;  c012622c <kmalloc+12c/1bc>
   9:   74 55                     je     60 <_EIP+0x60> c0126283 
<kmalloc+183/1bc>
Code;  c012622e <kmalloc+12e/1bc>
   b:   b8 a5 c2 0f 17            mov    $0x170fc2a5,%eax
Code;  c0126233 <kmalloc+133/1bc>
  10:   87 46 00                  xchg   %eax,0x0(%esi)
Code;  c0126236 <kmalloc+136/1bc>
  13:   3d 00 00 00 00            cmp    $0x0,%eax

 kernel BUG at slab.c:580!
invalid operand: 0000
CPU:    0
EIP:    0010:[vmfree_area_pages+239/396]
EFLAGS: 00010286
eax: 0000001a   ebx: c13bf768   ecx: c033e280   edx: 00002950
esi: 00000000   edi: 00001000   ebp: c880b44c   esp: cdf67f78
ds: 0018   es: 0018   ss: 0018
Process kswapd (pid: 3, stackpage=cdf67000)
Stack: c02be985 00000244 00000000 00000001 00000000 c13bf768 00001000 
c5a5c000
       c0126965 c13bf768 c880b44c 00000004 0000019b cdf66239 0008e000 
c13bf6ec
       c03ad22c 00000000 00000001 00000001 c01284e8 00000004 cdf66000 
c02bf1b1
Call Trace: [kmalloc+145/448] [page_launder+812/2012] 
[page_launder+903/2012] [flush_thread+8/64]
Code: 0f 0b 83 c4 08 46 3b 73 14 0f 82 1a ff ff ff 8b 45 08 8b 75

Code;  00000000 Before first symbol
00000000 <_EIP>:
Code;  00000000 Before first symbol
   0:   0f 0b                     ud2a  
Code;  00000002 Before first symbol
   2:   83 c4 08                  add    $0x8,%esp
Code;  00000005 Before first symbol
   5:   46                        inc    %esi
Code;  00000006 Before first symbol
   6:   3b 73 14                  cmp    0x14(%ebx),%esi
Code;  00000009 Before first symbol
   9:   0f 82 1a ff ff ff         jb     ffffff29 <_EIP+0xffffff29> 
ffffff29 <END_OF_CODE+3fc11c55/????>
Code;  0000000f Before first symbol
   f:   8b 45 08                  mov    0x8(%ebp),%eax
Code;  00000012 Before first symbol
  12:   8b 75 00                  mov    0x0(%ebp),%esi

Re: kernel BUG at slab.c:1244! (and slab.c:580)

[Tachino Nobuhiro]

Hello,

At Wed, 11 Jul 2001 12:38:34 -0400,
David Ford wrote:
> 
> Hrm.  Third time I've reported this, it's happened since the early 2.4 
> kernels and I can get at least one every day or so.  The odd thing is 
> that the first oops normally happens within a couple hours after boot 
> but it may take weeks before another oops will happen.  The oops always 
> has a trace similar to below.  The second oops is new to me, it happened 
> last night and I haven't seen it before, culled from syslog.
> 
> # uname -r
> 2.4.5-ac15

  2.4.5-ac19 fixes the minor tty layer bug which modifies the memory after 
kfree() was called and it causes Oops if memory allocations debugging is enabled.
So, upgrading to newer kernel may fix your problem.