Qu Wenruo writes:
On 2020/7/15 下午9:49, Chris Down wrote:While testing my pending patches on top of linux-next, I encountered a bug that seems related to this patch during btrfs unmount. Specifically, a null pointer dereference in kobject_del inside btrfs_sysfs_del_qgroups from close_ctree. The fix may be as simple as checking if the kobject is initialised, although perhaps it should always be initialised in this case, so I'll leave you to work out what the real issue is :-)Thank you very much for the report. May I ask if the qgroup is enabled? Or qgroup is not enabled at all?
I have quotas disabled, so I assume qgroup is also implicitly disabled.
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