Re: WARNING in get_unlocked_entry
From: Dmitry Vyukov
Date: Wed Oct 31 2018 - 15:21:08 EST
On Wed, Oct 31, 2018 at 8:18 PM, Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote:
> On Wed, Oct 31, 2018 at 10:46:19AM +0100, Dmitry Vyukov wrote:
>> On Wed, Oct 31, 2018 at 4:18 AM, Matthew Wilcox <willy@xxxxxxxxxxxxx> wrote:
>> > On Tue, Oct 30, 2018 at 08:00:03AM -0700, syzbot wrote:
>> >> syzbot found the following crash on:
>> >> HEAD commit: 4b42745211af Merge tag 'armsoc-soc' of git://git.kernel.or..
>> >> git tree: upstream
>> >> console output: https://syzkaller.appspot.com/x/log.txt?x=1187d06d400000
>> >> kernel config: https://syzkaller.appspot.com/x/.config?x=93932074d01b4a5
>> >> dashboard link: https://syzkaller.appspot.com/bug?extid=4fd0c066d82852499145
>> >> compiler: gcc (GCC) 8.0.1 20180413 (experimental)
>> >> Unfortunately, I don't have any reproducer for this crash yet.
>> > Hmmpf. Would have been nice if syzbot had caught this during its tests
>> > of the -next tree ...
>> What -next tree do you mean? If it satisfies the criteria we can add it:
> I meant linux-next, as in the merge of everybody's -next trees. Reading
> that bug, it seems outside your scope for now ;-(
We do test linux-next:
But this crash happened only once across all trees and machines. So it
just looks too elusive (subtle race?) to be reliably spotted in