linux-kernel - Re: [syzbot] [kernel?] kernel BUG in binder_alloc_deferred

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Message-ID: <zgopoeun6qh6olzr7rogagibyhpdr4n42cakznftggwq6dwss2@4lyki4vw2dkr>
Date: Mon, 4 Nov 2024 11:26:29 -0500
From: "Liam R. Howlett" <Liam.Howlett@...cle.com>
To: syzbot <syzbot+dee8aa54cb2f5a150f9e@...kaller.appspotmail.com>
Cc: akpm@...ux-foundation.org, arve@...roid.com, brauner@...nel.org,
        cmllamas@...gle.com, gregkh@...uxfoundation.org, hdanton@...a.com,
        joel@...lfernandes.org, linux-kernel@...r.kernel.org,
        lorenzo.stoakes@...cle.com, maco@...roid.com, surenb@...gle.com,
        syzkaller-bugs@...glegroups.com, tkjos@...roid.com
Subject: Re: [syzbot] [kernel?] kernel BUG in binder_alloc_deferred_release
 (2)

* syzbot <syzbot+dee8aa54cb2f5a150f9e@...kaller.appspotmail.com> [241104 11:21]:
> syzbot has bisected this issue to:
> 
> commit f8d112a4e657c65c888e6b8a8435ef61a66e4ab8
> Author: Liam R. Howlett <Liam.Howlett@...cle.com>
> Date:   Fri Aug 30 04:00:54 2024 +0000
> 
>     mm/mmap: avoid zeroing vma tree in mmap_region()
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11fc46a7980000
> start commit:   c2ee9f594da8 KVM: selftests: Fix build on on non-x86 archi..
> git tree:       upstream
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=13fc46a7980000
> console output: https://syzkaller.appspot.com/x/log.txt?x=15fc46a7980000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=a34ca8ca33c0e535
> dashboard link: https://syzkaller.appspot.com/bug?extid=dee8aa54cb2f5a150f9e
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1484165f980000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=132b2ebb980000
> 
> Reported-by: syzbot+dee8aa54cb2f5a150f9e@...kaller.appspotmail.com
> Fixes: f8d112a4e657 ("mm/mmap: avoid zeroing vma tree in mmap_region()")
> 
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Let's get this out of the way..

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git/ mm-hotfixes-unstable