linux-kernel - Re: [PATCH -mm] coredump: add support for %d=__get

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Message-Id: <20120913152559.d0a9ade0.akpm@linux-foundation.org>
Date:	Thu, 13 Sep 2012 15:25:59 -0700
From:	Andrew Morton <akpm@...ux-foundation.org>
To:	Oleg Nesterov <oleg@...hat.com>
Cc:	Alex Kelly <alex.page.kelly@...il.com>,
	Andi Kleen <andi@...stfloor.org>,
	Cong Wang <amwang@...hat.com>,
	Denys Vlasenko <vda.linux@...glemail.com>,
	Jiri Moskovcak <jmoskovc@...hat.com>,
	Neil Horman <nhorman@...driver.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH -mm] coredump: add support for %d=__get_dumpable() in
 core name

On Thu, 13 Sep 2012 19:28:17 +0200
Oleg Nesterov <oleg@...hat.com> wrote:

> https://bugzilla.redhat.com/show_bug.cgi?id=787135

Needs a RH bugzilla account, so no Reported-by: for you!

> Some coredump handlers want to create a core file in a way compatible
> with standard behavior. Standard behavior with fs.suid_dumpable = 2
> is to create core file with uid=gid=0. However, there was no way for
> coredump handler to know that the process being dumped was suid'ed.
> 
> This patch adds the new %d specifier for format_corename() which
> simply reports __get_dumpable(mm->flags), this is compatible with
> /proc/sys/fs/suid_dumpable we already have.

Please prepare an update to Documentation/sysctl/kernel.txt:core_pattern?
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