linux-kernel - RE: BUG: unable to handle kernel NULL pointer dereference at 00000000000000a8 in nilfs_segctor_do

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Message-ID: <b979e974-93a0-f418-6bfb-95b600769953@inetstar.ru>
Date:   Mon, 23 Dec 2019 19:18:20 +0300
From:   Сергей Каменев 
        <nilfs19@...tstar.ru>
To:     linux-kernel@...r.kernel.org
Subject: RE: BUG: unable to handle kernel NULL pointer dereference at
 00000000000000a8 in nilfs_segctor_do_constr

Hi all!

I also found a similar error in kernel
4.19.85
4.19.88
5.4.6

I generally can not use NILFS2 partitions for more than 2 minutes.

Which I try write to partition I see:

BUG: kernel NULL pointer dereference

Call trace:
__test_set_page_writeback+0x2d6/0x300
nilfs_segstor_do_construct+0xcc9/0x1220 [nilfs2]

Screenshot:

https://hsto.org/webt/87/md/lc/87mdlc4jqvxucjon7jai4pcwy34.jpeg
https://hsto.org/webt/sf/rs/uk/sfrsukkoq60liw0btmikpzwrpom.jpeg

https://hsto.org/webt/g7/cw/fx/g7cwfxijgykq43tjc3-vx48cpui.jpeg
https://hsto.org/webt/ft/i4/wy/fti4wyofwz1iiqkfhlwrghc-jtk.jpeg