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SubjectRe: [PATCH 1/1] file capabilities: simplify signal check
Quoting Andrew Morton (akpm@linux-foundation.org):
> On Wed, 20 Feb 2008 10:15:50 -0600 "Serge E. Hallyn" <serue@us.ibm.com> wrote:
>
> > >From bd076c7245d02be0cc01b7c09bd7170ec5946492 Mon Sep 17 00:00:00 2001
> > From: Serge E. Hallyn <serue@us.ibm.com>
> > Date: Sun, 17 Feb 2008 20:28:07 -0500
> > Subject: [PATCH 1/1] file capabilities: simplify signal check
> >
> > Simplify the uid equivalence check in cap_task_kill(). Anyone
> > can kill a process owned by the same uid.
> >
> > Without this patch wireshark is reported to fail.
>
> Strange that a patch titled "simplify...." actually fixes a bug.

Sorry. Yeah that's a bad subject.

> > Signed-off-by: Serge E. Hallyn <serue@us.ibm.com>
> > Signed-off-by: Andrew G. Morgan <morgan@kernel.org>
> > ---
> > security/commoncap.c | 2 +-
> > 1 files changed, 1 insertions(+), 1 deletions(-)
> >
> > diff --git a/security/commoncap.c b/security/commoncap.c
> > index 5aba826..bb0c095 100644
> > --- a/security/commoncap.c
> > +++ b/security/commoncap.c
> > @@ -552,7 +552,7 @@ int cap_task_kill(struct task_struct *p, struct siginfo *info,
> > * allowed.
> > * We must preserve legacy signal behavior in this case.
> > */
> > - if (p->euid == 0 && p->uid == current->uid)
> > + if (p->uid == current->uid)
> > return 0;
> >
> > /* sigcont is permitted within same session */
>
> I've marked this as needed-in-2.6.24. Was that appropriate?

Yes, thanks. I doubt wireshark is the only thing that'll break
otherwise.

thanks,
-serge


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