[syzbot] Monthly mm report (Jun 2023)

[syzbot]

Hello mm maintainers/developers,

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

During the period, 3 new issues were detected and 1 were fixed.
In total, 44 issues are still open and 217 have been fixed so far.

Some of the still happening issues:

Ref Crashes Repro Title
<1> 7330    Yes   WARNING in ext4_dirty_folio
                  https://syzkaller.appspot.com/bug?extid=ecab51a4a5b9f26eeaa1
<2> 473     No    KCSAN: data-race in generic_fillattr / shmem_mknod (2)
                  https://syzkaller.appspot.com/bug?extid=702361cf7e3d95758761
<3> 425     No    KCSAN: data-race in generic_fillattr / shmem_unlink (3)
                  https://syzkaller.appspot.com/bug?extid=f682b67a78ce05867e78
<4> 96      Yes   BUG: bad usercopy in fpa_set
                  https://syzkaller.appspot.com/bug?extid=cb76c2983557a07cdb14
<5> 78      No    linux-next boot error: WARNING: refcount bug in __reset_page_owner
                  https://syzkaller.appspot.com/bug?extid=2a0e61ee9fcd4f7fd8ef
<6> 77      No    KCSAN: data-race in __filemap_remove_folio / shmem_get_folio_gfp
                  https://syzkaller.appspot.com/bug?extid=ec4650f158c91a963120
<7> 4       Yes   INFO: task hung in __unmap_and_move (4)
                  https://syzkaller.appspot.com/bug?extid=b7ad168b779385f8cd58
<8> 1       Yes   KASAN: slab-use-after-free Read in mas_prev_nentry
                  https://syzkaller.appspot.com/bug?extid=f3728183b2f78d0d40f6

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