Bug#193146: Apache/1.3.26 Reload do_page_fault

[Matthew Wilcox <willy@debian.org>]

On Tue, May 13, 2003 at 10:00:28AM +0200, Lorenzo Benazzi wrote:
> Package:   apache
> Version:    1.3.26-1.1
> Arch:        HPPA
> Machine:  HP9000 model D210/100Mhz 32bit with 64MB RAM
> OS:          Debian GNU/Linux Sarge
> Kernel:     2.4.19-32
> Libc6:       2.3.1-16
> 
> Running /etc/init.d/apache reload the OS give a do a page fault
> 
> e.g.
> 
> $    /etc/init.d/apache reload
> Reloading apache configuration.
> $    dmesg
> 
> do_page_fault() pid=9415 command='apache' type=7 address=0x403e4c1b
> vm_start = 0x403e4000, vm_end = 0x403e6000
> 
>      YZrvWESTHLNXBCVMcbcbcbcbOGFRQPDI
> PSW: 00000000000001000000000100001111 Not tainted
> r00-03  00000000 40026e00 403e577b bff007c0
> r04-07  403f5d78 0007abd0 bff0087c bff00850
> r08-11  0000000c bff00844 40026a68 00000002
> r12-15  40015904 00000002 bff00850 40026fb4
> r16-19  40026fb4 0004a000 000698d0 403f5d78
> r20-23  00000001 00000001 403e5760 00000001
> r24-27  40026fb4 403e5760 0007abd0 000628d0
> r28-31  40027ef2 000003b5 bff00900 4000cf7b
> sr0-3   00000045 00000045 00000000 00000045
> sr4-7   00000045 00000045 00000045 00000045
> 
> IASQ: 00000045 00000045 IAOQ: 403e4c1b 403e4c1f
>  IIR: 075702a0    ISR: 00000045  IOR: 0007abd0
>  CPU:        0   CR30: 12a6c000 CR31: 103d0000
>  ORIG_R28: bff00910

How strange.  interruption 7 is a 'Instruction memory protection
trap'.  Basically, we've tried to execute something that's not
mapped with PROT_EXEC.  I'd be interested in seeing the output of
"cat /proc/9415/maps" -- though of course process 9415 won't be around
any more.  Can I see that for the PID of the currently running apache
to help me guess what it might be?

Did you add or remove any modules from the apache config?  Could it be
a particular moule that's causing this?  I'm also interested in knowing
what's mapped around 403e577b since that's the caller of this.

-- 
"It's not Hollywood.  War is real, war is primarily not about defeat or
victory, it is about death.  I've seen thousands and thousands of dead bodies.
Do you think I want to have an academic debate on this subject?" -- Robert Fisk