Re: Reminder: 1 open syzbot bug in sound subsystem

Takashi Iwai
2019-07-24T07:08:30Z

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
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>
> 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 If you believe this bug is no longer valid, please close the syzbot report by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@syzkaller.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
>
>