From: Dan Carpenter <dan.carpenter@oracle.com>
To: Dmitry Vyukov <dvyukov@google.com>
Cc: Greg KH <gregkh@linuxfoundation.org>,
Alan Stern <stern@rowland.harvard.edu>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
syzbot <syzbot+dd3c97de244683533381@syzkaller.appspotmail.com>,
hdanton@sina.com, lenb@kernel.org, linux-acpi@vger.kernel.org,
linux-kernel@vger.kernel.org, rafael.j.wysocki@intel.com,
rafael@kernel.org, rjw@rjwysocki.net,
syzkaller-bugs@googlegroups.com, linux-usb@vger.kernel.org
Subject: Re: [syzbot] general protection fault in __device_attach
Date: Mon, 6 Jun 2022 15:38:39 +0300 [thread overview]
Message-ID: <20220606123839.GW2146@kadam> (raw)
In-Reply-To: <CACT4Y+bBWrLRwiowaWk8o4+XAtCHxxJiEQfiSkgM3BDut9atAw@mail.gmail.com>
On Sat, Jun 04, 2022 at 10:32:46AM +0200, 'Dmitry Vyukov' via syzkaller-bugs wrote:
> On Fri, 3 Jun 2022 at 18:12, Greg KH <gregkh@linuxfoundation.org> wrote:
> >
> > But again, is this a "real and able to be triggered from userspace"
> > problem, or just fault-injection-induced?
>
> Then this is something to fix in the fault injection subsystem.
> Testing systems shouldn't be reporting false positives.
> What allocations cannot fail in real life? Is it <=page_size?
>
Apparently in 2014, anything less than *EIGHT?!!* pages succeeded!
https://lwn.net/Articles/627419/
I have been on the look out since that article and never seen anyone
mention it changing. I think we should ignore that and say that
anything over PAGE_SIZE can fail. Possibly we could go smaller than
PAGE_SIZE...
regards,
dan carpenter
next prev parent reply other threads:[~2022-06-06 12:48 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-03-14 8:46 [syzbot] general protection fault in __device_attach syzbot
2022-06-02 19:49 ` syzbot
2022-06-03 10:02 ` syzbot
2022-06-03 11:04 ` Andy Shevchenko
2022-06-03 15:42 ` Alan Stern
2022-06-03 15:52 ` Greg KH
2022-06-03 16:03 ` Alan Stern
2022-06-03 16:11 ` Greg KH
2022-06-03 16:27 ` Alan Stern
2022-06-04 8:32 ` Dmitry Vyukov
2022-06-06 12:38 ` Dan Carpenter [this message]
2022-06-07 7:15 ` Dmitry Vyukov
2022-06-08 3:25 ` Matthew Wilcox
2022-06-08 8:20 ` Dmitry Vyukov
2022-06-08 8:24 ` Dmitry Vyukov
2024-01-10 13:12 ` [syzbot] [kernel?] " syzbot
[not found] <20220603033532.5154-1-hdanton@sina.com>
2022-06-03 3:55 ` [syzbot] " syzbot
[not found] <20220603074439.5255-1-hdanton@sina.com>
2022-06-03 10:41 ` syzbot
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