From: Greg KH <greg@kroah.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: stable <stable@vger.kernel.org>, Oleg Nesterov <oleg@redhat.com>
Subject: Re: [PATCH] fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent
Date: Mon, 9 Nov 2020 11:20:06 +0100 [thread overview]
Message-ID: <20201109102006.GA1238384@kroah.com> (raw)
In-Reply-To: <CAHk-=wgukcYn0xpqJ+Vda1Zw9wxPCxV0L_ZX6AmpgapT9Lp2mw@mail.gmail.com>
On Sun, Nov 08, 2020 at 11:56:48AM -0800, Linus Torvalds wrote:
> .. oh, and I suspect it should have been marked for stable.
>
> I added Oleg's ack (implicit in an earlier thread), but didn't add a stable tag.
>
> It's commit b4e00444cab4 ("fork: fix copy_process(CLONE_PARENT) race
> with the exiting ->real_parent") in my tree.
>
> I'm not sure how serious it is. Yeah, the race can cause the wrong
> exit signal in theory, but I think you almost have to do it with
> cooperating processes, at which point you could have just done it
> intentionally in the first place.
>
> But it does look like a real data race, and the fix looks small and
> obvious enough that I think it's stable material.
Now queued up to stable trees, thanks!
greg k-h
next prev parent reply other threads:[~2020-11-09 10:19 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20201107064722.GA139215@arch-e3.localdomain>
[not found] ` <CAHk-=whjyOuO-xwov7UWidBOkWyZv84TVA18hBb01V-hiML+yg@mail.gmail.com>
2020-11-08 19:56 ` [PATCH] fork: fix copy_process(CLONE_PARENT) race with the exiting ->real_parent Linus Torvalds
2020-11-09 10:20 ` Greg KH [this message]
2020-11-09 11:44 ` Oleg Nesterov
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