[syzbot] Monthly mm report (Jul 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, 13 new issues were detected and 2 were fixed.
In total, 48 issues are still open and 220 have been fixed so far.

Some of the still happening issues:

Ref Crashes Repro Title
<1> 7337    Yes   WARNING in ext4_dirty_folio
                  https://syzkaller.appspot.com/bug?extid=ecab51a4a5b9f26eeaa1
<2> 507     No    KCSAN: data-race in generic_fillattr / shmem_mknod (2)
                  https://syzkaller.appspot.com/bug?extid=702361cf7e3d95758761
<3> 451     No    KCSAN: data-race in generic_fillattr / shmem_unlink (3)
                  https://syzkaller.appspot.com/bug?extid=f682b67a78ce05867e78
<4> 217     Yes   kernel BUG in validate_mm (2)
                  https://syzkaller.appspot.com/bug?extid=70b97abe3e253d1c3f8e
<5> 200     Yes   general protection fault in mt_validate
                  https://syzkaller.appspot.com/bug?extid=6c0c8f9846801f6fbec0
<6> 91      No    KCSAN: data-race in __filemap_remove_folio / shmem_get_folio_gfp
                  https://syzkaller.appspot.com/bug?extid=ec4650f158c91a963120
<7> 33      No    WARNING in try_grab_page
                  https://syzkaller.appspot.com/bug?extid=9b82859567f2e50c123e
<8> 15      Yes   KASAN: slab-out-of-bounds Read in mt_validate_nulls
                  https://syzkaller.appspot.com/bug?extid=609e63261638ff3d5436
<9> 11      No    WARNING in validate_mm
                  https://syzkaller.appspot.com/bug?extid=a85a0b4b0f39dca529a5

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