In article <1etxgem.u1z5891ysej5vM%p99dreyf@criens.u-psud.fr>,
Emmanuel Dreyfus <p99dreyf@criens.u-psud.fr> wrote:
>Hello
>
>I fixed a bug in Linux ptrace emulation on the PowerPC. It's located in
>machine independent code, and I'm not sure this fix would not break non
>PowerPC ports (that is, i386, since Alpha and m68k do not seem to have a
>strong ptrace support).
>
>Therefore, I'm looking for someone who could test emulation of
>Linux/i386 gdb on a Linux process and check that this patch does not
>decrease gdb functionnality.

I think that this is a security hole...

christos

>
>Index: linux_misc.c
>===================================================================
>RCS file: /cvsroot/syssrc/sys/compat/linux/common/linux_misc.c,v
>retrieving revision 1.88
>diff -r1.88 linux_misc.c
>1225a1226
>>       int ret;
>1250c1251,1263
><                       return sys_ptrace(p, &pta, retval);
>---
>>                       ret = sys_ptrace(p, &pta, retval);
>>                       switch (request) {
>>                               case LINUX_PTRACE_PEEKTEXT:
>>                               case LINUX_PTRACE_PEEKDATA:
>>                                       ret = copyout (retval, 
>>                                           (caddr_t)SCARG(&pta, data),
>>                                           sizeof ret);
>>                                       *retval = SCARG(&pta, data);
>>                                       break;
>>                               default:        
>>                                       break;
>>                       }
>>                       return ret;
>
>-- 
>Emmanuel Dreyfus
>p99dreyf@criens.u-psud.fr