linux-kernel - Re: [syzbot] [mm?] KASAN: slab-use-after-free Read in mas_next

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <6877f947.a70a0220.693ce.002f.GAE@google.com>
Date: Wed, 16 Jul 2025 12:11:03 -0700
From: syzbot <syzbot+ebfd0e44b5c11034e1eb@...kaller.appspotmail.com>
To: Liam.Howlett@...cle.com, akpm@...ux-foundation.org, jannh@...gle.com, 
	liam.howlett@...cle.com, linux-kernel@...r.kernel.org, linux-mm@...ck.org, 
	lorenzo.stoakes@...cle.com, pfalcato@...e.de, syzkaller-bugs@...glegroups.com, 
	vbabka@...e.cz
Subject: Re: [syzbot] [mm?] KASAN: slab-use-after-free Read in mas_next_slot (2)

syzbot has bisected this issue to:

commit ef69a41567549aa8ba7deb350ab1f3f55011591d
Author: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
Date:   Fri Jul 11 11:38:23 2025 +0000

    mm/mremap: permit mremap() move of multiple VMAs

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=170f458c580000
start commit:   0be23810e32e Add linux-next specific files for 20250714
git tree:       linux-next
final oops:     https://syzkaller.appspot.com/x/report.txt?x=148f458c580000
console output: https://syzkaller.appspot.com/x/log.txt?x=108f458c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=adc3ea2bfe31343b
dashboard link: https://syzkaller.appspot.com/bug?extid=ebfd0e44b5c11034e1eb
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=11d0658c580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=15dd858c580000

Reported-by: syzbot+ebfd0e44b5c11034e1eb@...kaller.appspotmail.com
Fixes: ef69a4156754 ("mm/mremap: permit mremap() move of multiple VMAs")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection