Re: [f2fs-dev] f2fs node footer data corruption in Android device

[Chao Yu via Linux-f2fs-devel <linux-f2fs-devel@lists.sourceforge.net>]

On 4/27/25 09:49, Zhiguo Niu wrote:
> Hi Chao
> 
> Chao Yu <chao@kernel.org> 于2025年4月25日周五 13:30写道：
>>
>> Zhiguo,
>>
>> On 4/25/25 13:11, Zhiguo Niu wrote:
>>> Hi Chao and Jaegeuk,
>>>
>>> I encountered a problem with node footer data being corrupted on an
>>> Android device.(kernel version 6.6 and android version:15)
>>> after I merged the following patches, the problem still exists.
>>> https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs-tools.git/commit/?h=dev-test&id=eba08414c585f90760c4312f57dea78ea45cb5cb
>>> https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git/commit/fs/f2fs?h=dev-test&id=19426c4988aa85298c1b4caf2889d37ec5c80fea
>>> https://git.kernel.org/pub/scm/linux/kernel/git/jaegeuk/f2fs.git/commit/fs/f2fs?h=dev-test&id=c2ecba026586cda6c7dc0fe9e6e60e7e9386c3bd
>>> and there is no nat_bits in mount option.
>>>
>>> I am still debugging, and would like to ask do you have any other
>>> hints or suggestions?
>>> The issue seem to be closely related to adb remount.
>>>
>>> test steps:
>>> ping 127.0.0.1 -n 20 > nul
>>> adb.exe -s mydevice  wait-for-device
>>> adb.exe  -s mydevice reboot bootloader
>>> fastboot -s mydevice  erase userdata
>>> fastboot -s mydevice  erase cache
>>> fastboot -s mydevice  reboot
>>> ping 127.0.0.1 -n 30 > nul
>>> adb.exe -s mydevice wait-for-device
>>> adb.exe -s mydevice root
>>> adb.exe -s mydevice remount
>>
>> Any change for mount option? Can you provide mount option before/after
>> remount?
>>
>>> adb.exe -s mydevice shell   rm -rf /data/somefile/*
>>
>> How about enabling all f2fs tracepoints to catch how target node was
>> updated?
> Thanks for your quick feedback, this is a useful suggestion.
> Thanks a lot.

Hi Zhiguo,

Can this testcase reproduce the bug stably? and any progress on this issue?

Thanks,

>>
>> Thanks,
>>
>>>
>>> dmesg:
>>> dm-59: userdata partition, dm-7: scratch image partition is for adb remount
>>> [    3.893630] F2FS-fs (dm-59): Using encoding defined by superblock:
>>> utf8-12.1.0 with flags 0x0
>>> [    3.930213] F2FS-fs (dm-59): Mounted with checkpoint version = 38485b2d
>>> [   20.584169] F2FS-fs (dm-7): Mounted with checkpoint version = 42130ef
>>> [   38.039122] F2FS-fs (dm-59): inconsistent node block, nid:1426,
>>> node_footer[nid:129565021,ino:2756062298,ofs:26782845,cpver:6421703165179826912,blkaddr:3577851147]
>>> [   38.048310] F2FS-fs (dm-59): inconsistent node block, nid:1426,
>>> node_footer[nid:129565021,ino:2756062298,ofs:26782845,cpver:6421703165179826912,blkaddr:3577851147]
>>> [   38.051725] F2FS-fs (dm-59): inconsistent node block, nid:1426,
>>> node_footer[nid:129565021,ino:2756062298,ofs:26782845,cpver:6421703165179826912,blkaddr:3577851147]
>>> thanks
>>



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