Re: ubifs_decompress: cannot decompress 2293 bytes, compressor lzo, error -22

[Scott Zhang <macromarship@gmail.com>]

Thanks.

I will do more tests.

I created ubifs by using buildroot with default options.
My nand drivers only pass biterrors test at the moment.
I am using default buildroot ubifs.img so I didn't test with others yet.

I will let you know after I finish the test.

On Tue, Apr 19, 2022 at 3:44 PM Richard Weinberger <richard@nod.at> wrote:
>
> ----- Ursprüngliche Mail -----
> > Did you run the various nand tests besides nandbiterrs? If they all
> > pass then maybe Richard will be more helpful than I am...
>
> [...]
>
> >>
> >> But I noticed the lzo decompress error is still there.
> >> I did  following actions to test.
> >> /dev/mtd3 is mounted on /opt using ubifs.
> >> tar zcvf /root/opt.tar.gz /opt  (done without error)
> >> format /opt.
> >> tar zxvf /root/opt.tar.gz -C /
>
> How did you create ubifs?
>
> Does your nand driver pass ubi tests?
>
> >> Then when I run php program which is in opt. I saw dmesg
> >> [  118.850000] UBIFS error (ubi0:0 pid 1526): ubifs_decompress: cannot
> >> decompress 2293 bytes, compressor lzo, error -22
> >> [  118.860000] UBIFS error (ubi0:0 pid 1526): do_readpage: bad data
> >> node (block 15, inode 396)
> >> [  118.870000] UBIFS error (ubi0:0 pid 1526): do_readpage: cannot read
> >> page 15 of inode 396, error -22
> >> [  118.880000] UBIFS error (ubi0:0 pid 1526): ubifs_decompress: cannot
> >> decompress 2293 bytes, compressor lzo, error -22
> >> [  118.900000] UBIFS error (ubi0:0 pid 1526): do_readpage: bad data
> >> node (block 15, inode 396)
> >> [  118.900000] UBIFS error (ubi0:0 pid 1526): do_readpage: cannot read
> >> page 15 of inode 396, error -22
> >> [  118.920000] UBIFS error (ubi0:0 pid 1526): ubifs_decompress: cannot
> >> decompress 2293 bytes, compressor lzo, error -22
> >> [  118.930000] UBIFS error (ubi0:0 pid 1526): do_readpage: bad data
> >> node (block 15, inode 396)
> >> [  118.940000] UBIFS error (ubi0:0 pid 1526): do_readpage: cannot read
> >> page 15 of inode 396, error -22
> >>
> >> I removed the ubifs_dump_node call to avoid many dump text. The
> >> problem is when I run php program, lots of above logs dumped.
> >> But I don't see any effect of the above logs. the program seems running.
> >> Is there a possibility the underlying nand driver data is ok, but the
> >> lzo compress/decompress code has bugs ?  I am running linux-5.4.y
> >> cloned from kernel.org.
>
> Does the problem only happen with lzo?
>
> Please re-test with no compressor enabled (compr=none) and also mount with
> the chk_data_crc mount option.
>
> Thanks,
> //richard

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