erofs pointer corruption and kernel crash

[Gao Xiang]

On 2026/4/10 18:10, Arseniy Krasnov wrote:
> 
> 
> 10.04.2026 13:06, Gao Xiang пишет:
>>
>>
>> On 2026/4/10 18:03, Arseniy Krasnov wrote:
>>>
>>>
>>> 10.04.2026 13:01, Gao Xiang пишет:
>>>>
>>>>
>>>> On 2026/4/10 17:59, Arseniy Krasnov wrote:
>>>>>
>>>>>
>>>>> 10.04.2026 12:20, Gao Xiang wrote:
>>>>>>
>>>>>>
>>>>>> On 2026/4/10 16:55, Arseniy Krasnov wrote:
>>>>>>>
>>>>>>>
>>>>>>
>>>>>> ...
>>>>>>
>>>>>>>>>
>>>>>>>>> BR2_TARGET_ROOTFS_EROFS=y
>>>>>>>>> BR2_TARGET_ROOTFS_EROFS_CUSTOM_COMPRESSION=y
>>>>>>>>> BR2_TARGET_ROOTFS_EROFS_COMPRESSION_ALGORITHMS="zstd,22 --max-extent-bytes 65536 -E48bit"
>>>>>>
>>>>>> btw, may I ask what's the erofs-utils version?
>>>>>> erofs-utils 1.9?
>>>>>
>>>>> We have 1.8.5 erofs-utils
>>>>
>>>> 1.8.5 shouldn't have `-E48bit` support, that is my question.
>>>
>>> You mean to try to reproduce with 1.9 utils ?
>>
>> Nope, I meant
>>
>> BR2_TARGET_ROOTFS_EROFS_COMPRESSION_ALGORITHMS="zstd,22 --max-extent-bytes 65536 -E48bit"
>>
>> is invalid in erofs-utils 1.8.5.
>>
>> If you were using erofs-utils 1.9+, that may be due to
>> the new `-E48bit`;
>>
>> but you said you are using erofs-utils 1.8.5, that makes
>> me feel confused.
>>
> 
> Ah, ok, so need to debug it at kernel side as we talked before.

Sigh, you don't answer my questions:

1. so are you using `-E48bit` and newer erofs-utils verison?

2. Is "EXPERIMENTAL 48-bit layout support in use. Use at your
    own risk!" shown when mounting?

Thanks,
Gao Xiang