Messages in this thread | | | Date | Fri, 7 Jan 2011 20:49:13 +0100 | From | Oleg Nesterov <> | Subject | Re: [PATCH] Read THREAD_CPUTIME clock from other processes. |
| |
On 01/07, Roland McGrath wrote: > > > Yes, I was worried about possible security issues too. But, it seems, > > /proc/pid/task/tid/stat (do_task_stat) shows ->utime/stime anyway. > > This is constrained by ptrace_may_access(task, PTRACE_MODE_READ).
Well, ptrace_may_access() protects only get_wchan/eip/esp, but not utime/stime.
> That's good, but it should be mentioned so that next year someone doesn't > come back with a "there's no reason you shouldn't be able to" and go > unchallenged.
Yes, agreed. The changelog should be improved.
Oleg.
| |