Re: ubifs_check_node: bad CRC

[Richard Weinberger <richard.weinberger@xxxxxxxxx>]

On Fri, Aug 23, 2019 at 11:25 AM Mickael Chazaux
<mickael.chazaux@xxxxxxxxxxxxxxx> wrote:
> > Hmm. Power cuts or many writes should not trigger such a corruption.
> > I'd expect ECC errors or data structure errors in UBIFS. But not a good ECC
> > with bad UBIFS data CRC.
> >
> > But with only one sample it is almost impossible to figure...
> >
>
> Memory corruption as in some kind of buffer overflow or use after free ? or physical
> bus errors? Anyway I think I will implement some mitigations at the application level,
> (eg. less log messages, recovery by creating a new volume, copy the now-readonly data,
> rename the volume) because the haystack just got too big for the needle.

This could be caused my any kind of corruption. Do you monitor your devices?
Maybe the crash also once in a while and you notice only the case when bad data
is written to flash.

-- 
Thanks,
//richard

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