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

[Scott Zhang]

the lzo error is not always. It didn't happen on root partition yet.
On opt, only when few files are being read, dmesg would complain lzo
decompress. I don't know how this happen for first time. Only  when
this happens, it sticks there, I don't see any side effect, seams
everything continues working.

On Tue, Apr 19, 2022 at 5:03 PM Scott Zhang <macromarship at gmail.com> wrote:
>
> 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 at 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