On Sat, Feb 13, 2010 at 01:32:36PM +0100, Ine Ya wrote: > Package: linux-2.6 > Version: 2.6.26-21 > Severity: normal > Tags: patch > > /proc/pid/maps is empty for all processes, only /proc/self/maps works. > > The following patch helped me to fix the problem: > --- linux-2.6-2.6.26/fs/proc/base.c 2008-07-13 16:51:29.000000000 -0500 > +++ linux/fs/proc/base.c 2009-12-26 02:14:58.000000000 -0600 > @@ -251,7 +251,8 @@ > task_lock(task); > if (task->mm != mm) > goto out; > - if (task->mm != current->mm && __ptrace_may_attach(task) < 0) > + if (task->mm != current->mm && ((mm->flags & MMF_IN_EXEC) || > + __ptrace_may_attach(task) < 0)) > goto out; > task_unlock(task); > return mm; > > I'm writing this report from modified kernel, which contains this > patch, and I test like 'cat /proc/1/maps' works now.
looks like mm_for_maps() had several fixes since the last security update that got applied to lenny, see 704b836c for example. dannf please evaluate if it is severity important. thanks -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected]
