[OpenWrt-Devel] Random data on rootfs_data for tp-wr2543nd-v1 only with ath79

Luiz Angelo Daros de Luca luizluca at gmail.com
Fri Jan 31 01:53:14 EST 2020


I'm trying to debug
So far, what I discovered:

1) it happens only in master, 19.07 is fine on both ath79 and ar71xx
2) it happens only in ath79. ar71xx is fine in master
3) rootfs_data (mtd4) contents keeps changing on each read. Each time I
run: "dd if=/dev/mtd4 | md5sum - " I get a different hash.
4) I get the random data reading flash from firmware (mtd1), rootfs (mtd3)
or rootfs_data(mtd4), but always around the region where rootfs_data is
(after squashfs). I could not identify the exactly upper and lower
boundaries where it happens (addresses are random).
5) I also happens without mounting jffs2 (failsafe)
6) Most mtd4 is 0xff (as expected). Only sparse bytes or sequence of bytes
contains other values.
7) I looked for a string inside mtd4 (if I came some a buffer), but changes
where too small and without any sequence of printable chars.

There are plenty of longs in the bug report.

Has someone faced something similar?

     Luiz Angelo Daros de Luca
            luizluca at gmail.com
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