From: ebiederm@xmission.com (Eric W. Biederman)
To: "Bill Huey \(hui\)" <bill.huey@gmail.com>
Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Subject: Re: BUG: wait_task_zombie NULL dereference
Date: Tue, 04 Dec 2012 11:20:25 -0800 [thread overview]
Message-ID: <87txs162va.fsf@xmission.com> (raw)
In-Reply-To: <CAAmnkzkzCg8tR0k4VZRp_HPErE73ykFc7K8SpqEi7AU_6Dyk=g@mail.gmail.com> (Bill Huey's message of "Tue, 4 Dec 2012 06:03:09 -0800")
"Bill Huey (hui)" <bill.huey@gmail.com> writes:
> I should add that I encountered this on 3.6.0 with some mild
> modifications to the scheduler path that enqueue/dequeue a task before
> any of the schedule exit logic gets hit. The SCHED_FF/FIFO rebalancer
> does much the same so I can't imagine that being the source of the
> problem.
>
> I could be wrong however.
In 3.6 from_kuid_munged should be only be expanded to the inline noop
version.
The code you quote does not exist in kernel/exit.c in wait_task_zombie
and has not existed in wait_task_zombie in Linus's tree. So since I
can't see the code I can't help.
I suspect the bug relates to your local modifications.
Eric
prev parent reply other threads:[~2012-12-04 19:20 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-12-04 13:48 Bill Huey (hui)
2012-12-04 14:03 ` Bill Huey (hui)
2012-12-04 19:20 ` Eric W. Biederman [this message]
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