From: David Sterba <dsterba@suse.cz>
To: Qu Wenruo <quwenruo.btrfs@gmx.com>
Cc: cen zhang <zzzccc427@gmail.com>,
clm@fb.com, josef@toxicpanda.com, dsterba@suse.com,
linux-btrfs@vger.kernel.org, linux-kernel@vger.kernel.org,
baijiaju1990@gmail.com, zhenghaoran154@gmail.com
Subject: Re: [BUG] btrfs: Assertion failed in btrfs_exclop_balance on balance ioctl
Date: Thu, 26 Jun 2025 16:11:51 +0200 [thread overview]
Message-ID: <20250626141151.GB31241@suse.cz> (raw)
In-Reply-To: <bbe21da7-eed3-4fb9-afd9-6f1c70c0eaed@gmx.com>
On Thu, Jun 26, 2025 at 06:50:17PM +0930, Qu Wenruo wrote:
>
>
> 在 2025/6/26 17:37, cen zhang 写道:
> > Hello Btrfs maintainers,
> >
> > I would like to report a kernel BUG, which appears to be a state
> > management issue in the balance ioctl path.
> >
> > The kernel panics due to a failed assertion in btrfs_exclop_balance()
> > at fs/btrfs/fs.c:127. The assertion fs_info->exclusive_operation ==
> > BTRFS_EXCLOP_BALANCE_PAUSED fails, indicating that the function was
> > called with an unexpected exclusive operation state.
> >
> > Here are the relevant details:
> >
> > Kernel Version: 6.16.0-rc1-g7f6432600434-dirty
> > Hardware: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996)
>
> Reproducer please?
>
> I guess you guys are running syzbot, then please provide the usual
> syzbot assets.
This might be the but that was once reported, I'll try to look it up,
some edge case of the exclusive ops and the convoluted balance states.
next prev parent reply other threads:[~2025-06-26 14:12 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-26 8:07 [BUG] btrfs: Assertion failed in btrfs_exclop_balance on balance ioctl cen zhang
2025-06-26 9:20 ` Qu Wenruo
2025-06-26 14:11 ` David Sterba [this message]
2025-06-26 14:16 ` David Sterba
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