[syzbot] Monthly nilfs report (Jun 2023)

[syzbot]

Hello nilfs maintainers/developers,

This is a 31-day syzbot report for the nilfs subsystem.
All related reports/information can be found at:
https://syzkaller.appspot.com/upstream/s/nilfs

During the period, 2 new issues were detected and 2 were fixed.
In total, 13 issues are still open and 33 have been fixed so far.

Some of the still happening issues:

Ref Crashes Repro Title
<1> 328     Yes   WARNING in nilfs_sufile_set_segment_usage
                  https://syzkaller.appspot.com/bug?extid=14e9f834f6ddecece094
<2> 258     Yes   kernel BUG at fs/buffer.c:LINE!
                  https://syzkaller.appspot.com/bug?extid=cfed5b56649bddf80d6e
<3> 71      Yes   INFO: task hung in nilfs_detach_log_writer
                  https://syzkaller.appspot.com/bug?extid=e3973c409251e136fdd0
<4> 58      Yes   WARNING in mark_buffer_dirty (5)
                  https://syzkaller.appspot.com/bug?extid=cdfcae656bac88ba0e2d
<5> 39      Yes   kernel BUG in folio_end_writeback
                  https://syzkaller.appspot.com/bug?extid=7e5cf1d80677ec185e63
<6> 11      No    BUG: unable to handle kernel NULL pointer dereference in nilfs_segctor_do_construct
                  https://syzkaller.appspot.com/bug?extid=5afc832d6dbb2fd17538
<7> 3       Yes   general protection fault in folio_create_empty_buffers
                  https://syzkaller.appspot.com/bug?extid=0ad741797f4565e7e2d2

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