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    SubjectRe: [RFC PATCH] proc: making "limits" world readable
    On Thu, Sep 23, 2010 at 02:56:42PM -0700, Andrew Morton wrote:
    > On Tue, 21 Sep 2010 11:10:55 +0200
    > Jiri Olsa <jolsa@redhat.com> wrote:
    >
    > > hi,
    > >
    > > I'd like to have the /proc/<pid>/limits file world readable,
    >
    > Why?
    >

    having this will ease the task of system management for large install
    bases and where root privileges might be restricted

    jirka

    > > but I'm not sure this could cause some security issue.. thoughts?
    > >
    > > The "limit" file was as a debug feature by following commit:
    > > - proc: export a processes resource limits via /proc/pid
    > > commit d85f50d5e1aa99ab082035f94265847521819e58
    > > Author: Neil Horman <nhorman@tuxdriver.com>
    > >
    > >
    > > thanks for any ideas,
    > > jirka
    > > ---
    > > fs/proc/base.c | 4 ++--
    > > 1 files changed, 2 insertions(+), 2 deletions(-)
    > >
    > > diff --git a/fs/proc/base.c b/fs/proc/base.c
    > > index a1c43e7..8e4adda 100644
    > > --- a/fs/proc/base.c
    > > +++ b/fs/proc/base.c
    > > @@ -2675,7 +2675,7 @@ static const struct pid_entry tgid_base_stuff[] = {
    > > INF("auxv", S_IRUSR, proc_pid_auxv),
    > > ONE("status", S_IRUGO, proc_pid_status),
    > > ONE("personality", S_IRUSR, proc_pid_personality),
    > > - INF("limits", S_IRUSR, proc_pid_limits),
    > > + INF("limits", S_IRUGO, proc_pid_limits),
    > > #ifdef CONFIG_SCHED_DEBUG
    > > REG("sched", S_IRUGO|S_IWUSR, proc_pid_sched_operations),
    > > #endif
    > > @@ -3011,7 +3011,7 @@ static const struct pid_entry tid_base_stuff[] = {
    > > INF("auxv", S_IRUSR, proc_pid_auxv),
    > > ONE("status", S_IRUGO, proc_pid_status),
    > > ONE("personality", S_IRUSR, proc_pid_personality),
    > > - INF("limits", S_IRUSR, proc_pid_limits),
    > > + INF("limits", S_IRUGO, proc_pid_limits),
    > > #ifdef CONFIG_SCHED_DEBUG
    > > REG("sched", S_IRUGO|S_IWUSR, proc_pid_sched_operations),
    > > #endif
    >


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