linux-ext4 - Re: Kernel bug at fs/ext4/resize.c:324! (6.8.12-amd64 on Debian)

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Message-ID: <ee3df746-901c-40bd-95b5-2a2b7340395f@huawei.com>
Date: Wed, 19 Jun 2024 11:53:30 +0800
From: Baokun Li <libaokun1@...wei.com>
To: <mikael@...rfeldt.com>
CC: <linux-ext4@...r.kernel.org>, Baokun Li <libaokun1@...wei.com>,
	<yangerkun@...wei.com>
Subject: Re: Kernel bug at fs/ext4/resize.c:324! (6.8.12-amd64 on Debian)

On 2024/6/19 3:17, Mikael Djurfeldt wrote:
> Hi,
>
> While trying to do a resize2fs to fill up an extended volume, I got
> the dump attached to this message.
>
> Best regards,
> MIkael Djurfeldt

[416875.741485] kernel BUG at fs/ext4/resize.c:324!

BUG_ON((flexbg_size > 1) && ((src_group & ~(flexbg_size - 1)) !=
         (last_group & ~(flexbg_size - 1))));

The src_group and last_group are not in the same flex_bg triggering
this BUG_ON(). It looks like flex_gd->count or flex_gd->resize_bg are
outliers? Could you use `dumpe2fs -h /dev/yourdevice` to get the
details of the disk that was resized in order to further locate the issue?

Regards,
Baokun