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Message-ID: <b48c9bad-3224-d606-d1a4-72239c3561e4@huawei.com>
Date: Sat, 8 Nov 2025 11:10:07 +0800
From: Zhihao Cheng <chengzhihao1@...wei.com>
To: Eddie James <eajames@...ux.ibm.com>, <linux-mtd@...ts.infradead.org>,
	<richard@....at>, <openbmc@...ts.ozlabs.org>, "linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>, <sethjenkins@...gle.com>,
	<adobriyan@...il.com>
Subject: Re: UBIFS errors since Linux 5.15

在 2025/11/8 11:03, Zhihao Cheng 写道:
> 在 2025/11/8 1:38, Eddie James 写道:
>>
>> Hello,
>>
>> We are updating some BMC (Aspeed AST2600, ARM32) systems that were on 
>> Linux 5.4 but observe consistent UBIFS errors with Linux 5.15 and 
>> later. The errors seem to vary; there is a sampling below.
>>
>>
>> We performed a git bisect and came up with the following commit, which 
>> of course is completely unrelated to UBIFS. Reverting it does prevent 
>> the issue... Does anyone have any suggestions?
>>
>> commit 33fc9e26b7cb39f0d4219c875a2451802249c225
> [...]
>> [    8.180486] UBIFS error (ubi0:2 pid 66): ubifs_check_node: bad 
>> magic 0x101831, expected 0x6101831
> 
> Hi, look here, the magic number 0x101831 vs 0x6101831, the difference is 
> the highest bit(0 vs 6[0110])
>> [    8.189578] UBIFS error (ubi0:2 pid 66): ubifs_check_node: bad node 
>> at LEB 17:64664
> 
> [...]
>> [ 3739.678968] UBIFS error (ubi0:2 pid 13): ubifs_check_node: bad CRC: 
>> calculated 0x9179af29, read 0xa760f4f5
> 
> [...]
>> [10412.723111] UBIFS error (ubi0:2 pid 297): ubifs_check_node: bad 
>> magic 0x6100830, expected 0x6101831
> 
> and there, magic number 0x6100830 vs 0x6101831, the difference is lowest 
> bit(0 vs 1).

Sorry, I need to make a correction, the differences are the lowest bit(0 
vs 1) and the middle bit (0 vs 1). The number of flipped bits is also two.
> 
> So, I guess the crc error is caused by the similar reason, maybe there 
> is something wrong with the nand driver or flash? According to the 
> version information(5.15, and the unrelated commit 33fc9e26b7cb3), is it 
> possible that there is a compatibility issue between your nand(bsp) 
> driver with kernel nand common layer(which from different versions)?
> 
>> [10412.732436] UBIFS error (ubi0:2 pid 297): ubifs_check_node: bad 
>> node at LEB 13:60248
> 
> 
> ______________________________________________________
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> http://lists.infradead.org/mailman/listinfo/linux-mtd/

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