[uml-devel] UML vs ptrace_scope

[uml-devel] UML vs ptrace_scope

[Michael Richardson]

I have been trying to bring the openswan nightly build system up again
on a newish system.   I started these scripts back in 2002, and it has been running
on and off for many years, and many kernel revisions.  
I started this most recent effort work when 3.5 was stable, so my guest
kernel is a 3.5 kernel running on a debian squeeze host with a 2.6.26
kernel.   I compile things fine.
With 2.6.26, I got:

...
Checking that ptrace can change system call numbers...ptrace: Operation
not permitted
check_ptrace : expected SIGSTOP, got status = 9

I upgraded to wheezy (needed to be done anyway), and then felt that I
ran run into the ptrace_scope problem.  At least, that's what I thought.
I installed a 3.8 debian kernel tree, patched it to enable YAMA, and
booted that finally.  I set:
   kernel.yama.ptrace_scope = 0

but this does not affect the above error.  Is there something else I am
missing?    I tried adding the capability, but it doesn't help.

curley-[~] mcr 10001 %sudo /sbin/setcap cap_sys_ptrace+ep
/btmp/build/HEAD/2013_05_12/openswan-2/UMLPOOL/plain26/linux
[sudo] password for mcr: 
curley-[~] mcr 10002 %sudo /sbin/getcap
/btmp/build/HEAD/2013_05_12/openswan-2/UMLPOOL/plain26/linux
        
/btmp/build/HEAD/2013_05_12/openswan-2/UMLPOOL/plain26/linux =
cap_sys_ptrace+ep

No I suspect the problem is elsewhere.
Is there something else I am missing?

-- 
]               Never tell me the odds!                 | ipv6 mesh networks [ 
]   Michael Richardson, Sandelman Software Works        | network architect  [ 
]     mcr@sandelman.ca  http://www.sandelman.ca/        |   ruby on rails    [ 
	


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