On Mon, Mar 31, 2008 at 09:09:17AM -0400, Martin Grossman wrote:
> My hosts (100) are all running 2.4.35 with skas3 and all UML patches.
> My UMLs (guests) are all running 2.4.35 with all UML patches.
I don't think you'll get much help with something as old as 2.4. I
haven't touched 2.4 in years.
However, ...
> 1) Once in 1 UML /bin/bash was core dumping every time it ran. I could
> see this by killing the UML and
> mounted to rootfs via loopback. /bin/bash (after a loopback mount)
> had the correct checksum.
>
> 2) Twice the "WC" program woulc always get a segfault yet once the UML
> was down and rootfs mounted via
> loopback the "WC" binary had the correct checksum.
>
> 3) SSHD inside the UMLs sometimes imm close incoming connections yet
> stays running. If I kill off sshd and
> restart it, it imm dies.
>
> 4) OSPFs are getting segfaults in all sorts of places. Its as if the
> memory (code/stack) is getting corrupted.
if these are 32-bit UMLs running on 64-bit hosts, there were various
host bugs (and I think maybe a UML bug or two) which would cause
process segfaults.
> subroutine A calls subroutine B and gets a segfault pushing the middle
> argument.....
>
> subB( oi, node->a, node->b)
>
> using GDB node is a valid pointer and its already pushed node->b onto
> the stack and gets a segfault
> when pushing node->a onto the stack. node is in %ebx, and is valid, and
> both %ebp and %esp are
> also valid.
Don't sweat the process code. These are kernel bugs (either host or
UML) of some sort.
Jeff
--
Work email - jdike at linux dot intel dot com
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