linux-kernel - Re: [syzbot] [virtualization?] upstream boot error: WARNING: refcount bug in __free_pages

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Date: Thu, 21 Mar 2024 08:07:22 -0400
From: Stefan Hajnoczi <stefanha@...hat.com>
To: syzbot <syzbot+70f57d8a3ae84934c003@...kaller.appspotmail.com>
Cc: jasowang@...hat.com, linux-kernel@...r.kernel.org,
	michael.christie@...cle.com, mst@...hat.com, osalvador@...e.de,
	pbonzini@...hat.com, syzkaller-bugs@...glegroups.com,
	virtualization@...ts.linux.dev, xuanzhuo@...ux.alibaba.com
Subject: Re: [syzbot] [virtualization?] upstream boot error: WARNING:
 refcount bug in __free_pages_ok

On Wed, Mar 20, 2024 at 01:08:02PM -0700, syzbot wrote:
> Hello,
> 
> syzbot has tested the proposed patch and the reproducer did not trigger any issue:
> 
> Reported-and-tested-by: syzbot+70f57d8a3ae84934c003@...kaller.appspotmail.com
> 
> Tested on:
> 
> commit:         4bedfb31 mm,page_owner: maintain own list of stack_rec..
> git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
> kernel config:  https://syzkaller.appspot.com/x/.config?x=527195e149aa3091
> dashboard link: https://syzkaller.appspot.com/bug?extid=70f57d8a3ae84934c003
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> 
> Note: no patches were applied.
> Note: testing is done by a robot and is best-effort only.
> 

Good, that was the expected last working commit. Here is the next commit
(it should fail):

#syz test: git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 217b2119b9e260609958db413876f211038f00ee

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