Messages in this thread | | | Date | Thu, 16 Feb 2012 00:05:33 +0400 | From | Cyrill Gorcunov <> | Subject | Re: + syscalls-x86-add-__nr_kcmp-syscall-v8.patch added to -mm tree |
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On Wed, Feb 15, 2012 at 11:57:33PM +0400, Vasiliy Kulikov wrote: > > > > This makes me scratch the head ;) I think ptrace_may_access (or > > some other security test) should remain since it's somehow weird > > if non-root task will be able to find objects order from privileged > > task. Thus I need to find a way how to handle execve(setuid_app). > > Need to think... > > Look at fs/proc/base.c:lock_trace() - it locks ->cred_guard_mutex > for the whole period of time when it uses a resource.
Yup, thanks Vasiliy! I've just found cred_guard_mutex in install_exec_creds. Now I'm thinking if this is what we need here ;)
Cyrill
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