Re: [syzbot] [virtualization?] upstream boot error: WARNING: refcount bug in __free_pages_ok

From: Stefan Hajnoczi
Date: Thu Mar 21 2024 - 08:07:56 EST


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@xxxxxxxxxxxxxxxxxxxxxxxxx
>
> 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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