linux-kernel - Re: Reminder: 22 open syzbot bugs in perf subsystem

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Date:   Tue, 2 Jul 2019 20:55:50 -0700
From:   Eric Biggers <ebiggers@...nel.org>
To:     Ravi Bangoria <ravi.bangoria@...ux.ibm.com>
Cc:     linux-kernel@...r.kernel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Song Liu <songliubraving@...com>,
        Kan Liang <kan.liang@...ux.intel.com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        syzkaller-bugs@...glegroups.com, Oleg Nesterov <oleg@...hat.com>
Subject: Re: Reminder: 22 open syzbot bugs in perf subsystem

On Wed, Jul 03, 2019 at 09:09:55AM +0530, Ravi Bangoria wrote:
> 
> 
> On 7/2/19 11:13 AM, Eric Biggers wrote:
> > --------------------------------------------------------------------------------
> > Title:              possible deadlock in uprobe_clear_state
> > Last occurred:      164 days ago
> > Reported:           201 days ago
> > Branches:           Mainline
> > Dashboard link:     https://syzkaller.appspot.com/bug?id=a1ce9b3da349209c5085bb8c4fee753d68c3697f
> > Original thread:    https://lkml.kernel.org/lkml/00000000000010a9fb057cd14174@google.com/T/#u
> > 
> > Unfortunately, this bug does not have a reproducer.
> > 
> > No one replied to the original thread for this bug.
> > 
> > If you fix this bug, please add the following tag to the commit:
> >     Reported-by: syzbot+1068f09c44d151250c33@...kaller.appspotmail.com
> > 
> > If you send any email or patch for this bug, please consider replying to the
> > original thread.  For the git send-email command to use, or tips on how to reply
> > if the thread isn't in your mailbox, see the "Reply instructions" at
> > https://lkml.kernel.org/r/00000000000010a9fb057cd14174@google.com
> > 
> 
> This is false positive:
> https://marc.info/?l=linux-kernel&m=154925313012615&w=2
> 

What do you mean "false positive"?  Your patch says there can be a deadlock.
Also, your patch hasn't been merged yet.  So doesn't it still need to be fixed?

- Eric