[plug] Linux

[Nathan Alberti]

"Unable to handle kernel paging request" just means that there was a
page fault that the kernel didn't know what to do with.  That's
usually caused by referencing a bad pointer.  You can also do it by
branching to oblivion.

Not my words....

Nathan.
----- Original Message -----
From: "Steve Grasso" <steveg at calm.wa.gov.au>
To: <plug at plug.linux.org.au>
Sent: Monday, November 26, 2001 4:04 PM
Subject: Re: [plug] Linux


> Buffer overflow in sendmail?
>
> On Monday 26 November 2001 16:20, Andrew Barbara wrote:
> > Hi
> > On of our servers crashed with the following output.  What does this
mean =
> > and how can we stop it from happening again?
> >
> > Nov  5 07:43:00 gateway kernel: Unable to handle kernel paging request
at =
> > virtual address eb851ed0
> > Nov  5 07:43:00 gateway kernel:  printing eip:
> > Nov  5 07:43:00 gateway kernel: c010dce1
> > Nov  5 07:43:00 gateway kernel: pgd entry c7023eb8: 0000000000000000
> > Nov  5 07:43:00 gateway kernel: pmd entry c7023eb8: 0000000000000000
> > Nov  5 07:43:00 gateway kernel: ... pmd not present!
> > Nov  5 07:43:00 gateway kernel: Oops: 0000
> > Nov  5 07:43:00 gateway kernel: CPU:    0
> > Nov  5 07:43:00 gateway kernel: EIP:    0010:[restore_fpu+1/32]
> > Nov  5 07:43:00 gateway kernel: EIP:    0010:[<c010dce1>]
> > Nov  5 07:43:00 gateway kernel: EFLAGS: 00010206
> > Nov  5 07:43:00 gateway kernel: eax: c3786000   ebx: c3786000   ecx: =
> > bfffe0b0   edx: 00000018
> > Nov  5 07:43:00 gateway kernel: esi: eb851eb8   edi: 3f9eb851   ebp: =
> > bfffde98   esp: c3787fb8
> > Nov  5 07:43:00 gateway kernel: ds: 0018   es: 0018   ss: 0018
> > Nov  5 07:43:00 gateway kernel: Process sendmail (pid: 6746,
> > stackpage=3Dc3= 787000)
> > Nov  5 07:43:00 gateway kernel: Stack: c010a029 c3786000 c01090b4
4025e9e4
> > = bfffe0b0 000eb851 eb851eb8 3f9eb851=20
> > Nov  5 07:43:00 gateway kernel:        bfffde98 3f900000 0000002b
0000002b
> > = ffffffff 40188db5 00000023 00010202=20
> > Nov  5 07:43:00 gateway kernel:        bfffde88 0000002b=20
> > Nov  5 07:43:00 gateway kernel: Call Trace: [math_state_restore+25/64] =
> > [ret_from_exception+0/16] [<eb851eb8>]=20
> > Nov  5 07:43:00 gateway kernel: Call Trace: [<c010a029>] [<c01090b4>] =
> > [<eb851eb8>]=20
> > Nov  5 07:43:00 gateway kernel:=20
> > Nov  5 07:43:00 gateway kernel: Code: 3a 34 32 3a 30 31 20 a1 6c 6b 25
c0 =
> > 8b 54 24 04 a9 00 00 00=20
> > Thanks.
> >
> > Andrew Barbara,  MCP
> > MMT Networks Pty Ltd
> > http://www.mmtnetworks.com.au
>