linux-kernel - Re: Reminder: 1 open syzbot bug in sound subsystem

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Date:   Wed, 24 Jul 2019 09:08:26 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     "Eric Biggers" <ebiggers@...nel.org>
Cc:     <alsa-devel@...a-project.org>, "Jaroslav Kysela" <perex@...ex.cz>,
        "Takashi Iwai" <tiwai@...e.com>, <syzkaller-bugs@...glegroups.com>,
        <linux-kernel@...r.kernel.org>
Subject: Re: Reminder: 1 open syzbot bug in sound subsystem

On Wed, 24 Jul 2019 04:47:23 +0200,
Eric Biggers wrote:
> 
> [This email was generated by a script.  Let me know if you have any suggestions
> to make it better, or if you want it re-generated with the latest status.]
> 
> Of the currently open syzbot reports against the upstream kernel, I've manually
> marked 1 of them as possibly being a bug in the sound subsystem.
> 
> If you believe this bug is no longer valid, please close the syzbot report by
> sending a '#syz fix', '#syz dup', or '#syz invalid' command in reply to the
> original thread, as explained at https://goo.gl/tpsmEJ#status
> 
> If you believe I misattributed this bug to the sound subsystem, please let me
> know, and if possible forward the report to the correct people or mailing list.
> 
> Here is the bug:
> 
> --------------------------------------------------------------------------------
> Title:              KASAN: use-after-free Read in wake_up_if_idle
> Last occurred:      131 days ago
> Reported:           267 days ago
> Branches:           Mainline and others
> Dashboard link:     https://syzkaller.appspot.com/bug?id=b1e300cd7b124fc83dd4199d4d1df26310111b0f
> Original thread:    https://lkml.kernel.org/lkml/00000000000066ab7105795f245e@google.com/T/#u

This one doesn't look like a bug that is directly related with the
sound stuff.  Although it was triggered from a sound ioctl, UAF is
seen rather in a notifier chain of other component.


thanks,

Takashi

> 
> 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+2c1253bc508adef78a7f@...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/00000000000066ab7105795f245e@google.com
> 
>