From: Dave Jones <davej@codemonkey.org.uk>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Al Viro <viro@zeniv.linux.org.uk>,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: proc_flush_task oops
Date: Mon, 18 Dec 2017 22:39:26 -0500 [thread overview]
Message-ID: <20171219033926.GA26981@codemonkey.org.uk> (raw)
In-Reply-To: <CA+55aFxkKNTukHGBBUmB+RasUAQPK3udsNw156yAyocr46cefg@mail.gmail.com>
On Mon, Dec 18, 2017 at 03:50:52PM -0800, Linus Torvalds wrote:
> But I don't see what would have changed in this area recently.
>
> Do you end up saving the seeds that cause crashes? Is this
> reproducible? (Other than seeing it twoce, of course)
Only clue so far, is every time I'm able to trigger it, the last thing
the child process that triggers it did, was an execveat.
Telling it to just fuzz execveat doesn't instantly trigger it, so it
must be a combination of some other syscall. I'll leave a script running
overnight to see if I can binary search the other syscalls in
combination with it.
One other thing: I said this was rc4, but it was actually rc4 + all the
x86 stuff from today. There's enough creepy stuff in that pile, that
I'll try with just plain rc4 tomorrow too.
Dave
next prev parent reply other threads:[~2017-12-19 3:39 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-12-18 21:44 proc_flush_task oops Dave Jones
2017-12-18 22:15 ` Al Viro
2017-12-18 23:10 ` Dave Jones
2017-12-18 23:50 ` Linus Torvalds
2017-12-19 1:22 ` Dave Jones
2017-12-19 3:39 ` Dave Jones [this message]
2017-12-19 10:49 ` Tetsuo Handa
2017-12-19 18:25 ` Eric W. Biederman
2017-12-19 18:27 ` Eric W. Biederman
2017-12-19 19:30 ` Dave Jones
2017-12-19 21:44 ` Eric W. Biederman
2017-12-20 1:54 ` Eric W. Biederman
2017-12-20 5:28 ` Dave Jones
2017-12-20 18:25 ` Eric W. Biederman
2017-12-21 3:16 ` Dave Jones
2017-12-21 8:26 ` Eric W. Biederman
2017-12-21 10:38 ` Alexey Dobriyan
2017-12-21 14:25 ` Dave Jones
2017-12-21 16:41 ` Eric W. Biederman
2017-12-21 22:00 ` Dave Jones
2017-12-22 1:31 ` Eric W. Biederman
2017-12-22 3:35 ` Dave Jones
2017-12-22 7:58 ` Eric W. Biederman
2017-12-22 10:13 ` Alexey Dobriyan
2017-12-22 14:41 ` Eric W. Biederman
2017-12-22 16:11 ` [TEST PATCH] pid: fix allocating pid 2 for init (was Re: proc_flush_task oops) Alexey Dobriyan
2017-12-24 3:12 ` Eric W. Biederman
2017-12-24 3:16 ` [PATCH] pid: Handle failure to allocate the first pid in a pid namespace Eric W. Biederman
2017-12-20 8:00 ` proc_flush_task oops Dmitry Vyukov
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