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

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Message-ID: <6728f46f.050a0220.2edce.14f6.GAE@google.com>
Date: Mon, 04 Nov 2024 08:21:03 -0800
From: syzbot <syzbot+dee8aa54cb2f5a150f9e@...kaller.appspotmail.com>
To: Liam.Howlett@...cle.com, akpm@...ux-foundation.org, arve@...roid.com, 
	brauner@...nel.org, cmllamas@...gle.com, gregkh@...uxfoundation.org, 
	hdanton@...a.com, joel@...lfernandes.org, liam.howlett@...cle.com, 
	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 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