[syzbot] Monthly mm report (Jul 2025)

[syzbot] Monthly mm report (Jul 2025)

[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, 7 new issues were detected and 2 were fixed.
In total, 117 issues are still open and 299 have already been fixed.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  7412    Yes   WARNING in ext4_dirty_folio
                   https://syzkaller.appspot.com/bug?extid=ecab51a4a5b9f26eeaa1
<2>  3828    Yes   INFO: rcu detected stall in worker_thread (9)
                   https://syzkaller.appspot.com/bug?extid=225bfad78b079744fd5e
<3>  3641    Yes   INFO: task hung in page_cache_ra_unbounded (2)
                   https://syzkaller.appspot.com/bug?extid=265e1cae90f8fa08f14d
<4>  2879    Yes   possible deadlock in filemap_fault
                   https://syzkaller.appspot.com/bug?extid=7736960b837908f3a81d
<5>  2554    Yes   possible deadlock in gup_fast_fallback
                   https://syzkaller.appspot.com/bug?extid=63ba90b81c16b86379bd
<6>  2365    Yes   BUG: Bad rss-counter state (5)
                   https://syzkaller.appspot.com/bug?extid=f2bbbb592debc978d46d
<7>  2135    Yes   WARNING in kunmap_local_indexed
                   https://syzkaller.appspot.com/bug?extid=691cb37358791bebebe6
<8>  607     No    KCSAN: data-race in __filemap_remove_folio / folio_mapping (2)
                   https://syzkaller.appspot.com/bug?extid=606f94dfeaaa45124c90
<9>  570     Yes   INFO: task hung in _vm_unmap_aliases (3)
                   https://syzkaller.appspot.com/bug?extid=fe8f8efd070d727de971
<10> 430     Yes   INFO: rcu detected stall in sys_newfstatat (4)
                   https://syzkaller.appspot.com/bug?extid=1c02a56102605204445c

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