linux-kernel - Re: [syzbot] [mm?] possible deadlock in lock_next

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Message-ID: <20250717023444.2281-1-hdanton@sina.com>
Date: Thu, 17 Jul 2025 10:34:43 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+159a3ef1894076a6a6e9@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com,
	lorenzo.stoakes@...cle.com,
	surenb@...gle.com,
	linux-mm@...ck.org
Subject: Re: [syzbot] [mm?] possible deadlock in lock_next_vma

> Date: Mon, 14 Jul 2025 09:38:33 -0700	[thread overview]
> syzbot has found a reproducer for the following issue on:
> 
> HEAD commit:    0be23810e32e Add linux-next specific files for 20250714
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=15cfb0f0580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=be9e2082003f81ff
> dashboard link: https://syzkaller.appspot.com/bug?extid=159a3ef1894076a6a6e9
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1003b18c580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=11437d82580000

Test [PATCH v7 0/7] use per-vma locks for /proc/pid/maps reads

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