[syzbot] Monthly mm report (Jan 2024)

[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, 2 new issues were detected and 3 were fixed.
In total, 34 issues are still open and 223 have been fixed so far.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  7363    Yes   WARNING in ext4_dirty_folio
                   https://syzkaller.appspot.com/bug?extid=ecab51a4a5b9f26eeaa1
<2>  607     No    KCSAN: data-race in generic_fillattr / shmem_unlink (3)
                   https://syzkaller.appspot.com/bug?extid=f682b67a78ce05867e78
<3>  489     Yes   BUG: bad usercopy in fpa_set
                   https://syzkaller.appspot.com/bug?extid=cb76c2983557a07cdb14
<4>  55      Yes   WARNING in __kfence_free (3)
                   https://syzkaller.appspot.com/bug?extid=59f37b0ab4c558a5357c
<5>  27      Yes   BUG: unable to handle kernel paging request in list_lru_add
                   https://syzkaller.appspot.com/bug?extid=2403e3909382fbdeaf6c
<6>  24      Yes   BUG: unable to handle kernel NULL pointer dereference in __kmap_local_page_prot
                   https://syzkaller.appspot.com/bug?extid=b18872ea9631b5dcef3b
<7>  11      No    WARNING in __gup_longterm_locked (2)
                   https://syzkaller.appspot.com/bug?extid=f2577d8071a92e596253
<8>  11      Yes   kernel BUG in do_page_mkwrite
                   https://syzkaller.appspot.com/bug?extid=cfba1abcb2cf7b39a320
<9>  8       Yes   kernel BUG in filemap_unaccount_folio
                   https://syzkaller.appspot.com/bug?extid=17a207d226b8a5fb0fd9
<10> 6       Yes   INFO: rcu detected stall in dput (8)
                   https://syzkaller.appspot.com/bug?extid=eb9f416500ff134ab699

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