[syzbot] Monthly mm report (Apr 2026)

[syzbot] Monthly mm report (Apr 2026)

[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 1 were fixed.
In total, 130 issues are still open and 369 have already been fixed.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  24253   Yes   WARNING in path_noexec (2)
                   https://syzkaller.appspot.com/bug?extid=a9391462075ffb9f77c6
<2>  7462    Yes   WARNING in ext4_dirty_folio
                   https://syzkaller.appspot.com/bug?extid=ecab51a4a5b9f26eeaa1
<3>  1919    Yes   kernel BUG in __filemap_add_folio
                   https://syzkaller.appspot.com/bug?extid=4d3cc33ef7a77041efa6
<4>  1762    Yes   KASAN: use-after-free Read in copy_folio_from_iter_atomic (2)
                   https://syzkaller.appspot.com/bug?extid=6cc93ec9a4035badb85f
<5>  976     No    KCSAN: data-race in __filemap_remove_folio / folio_mapping (2)
                   https://syzkaller.appspot.com/bug?extid=606f94dfeaaa45124c90
<6>  927     No    possible deadlock in lock_mm_and_find_vma (4)
                   https://syzkaller.appspot.com/bug?extid=709f5ab0e03871dec50a
<7>  701     Yes   INFO: rcu detected stall in addrconf_rs_timer (6)
                   https://syzkaller.appspot.com/bug?extid=fecf8bd19c1f78edb255
<8>  689     Yes   INFO: task hung in _vm_unmap_aliases (3)
                   https://syzkaller.appspot.com/bug?extid=fe8f8efd070d727de971
<9>  571     Yes   INFO: rcu detected stall in sys_openat (3)
                   https://syzkaller.appspot.com/bug?extid=23d96fb466ad56cbb5e5
<10> 529     Yes   INFO: rcu detected stall in x64_sys_call
                   https://syzkaller.appspot.com/bug?extid=65203730e781d98f23a0

---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzkaller@googlegroups.com.

To disable reminders for individual bugs, reply with the following command:
#syz set <Ref> no-reminders

To change bug's subsystems, reply with:
#syz set <Ref> subsystems: new-subsystem

You may send multiple commands in a single email message.