[syzbot] Monthly mm report (Apr 2024)

[syzbot] Monthly mm report (Apr 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, 10 new issues were detected and 7 were fixed.
In total, 47 issues are still open and 238 have been fixed so far.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  10216   Yes   KASAN: slab-out-of-bounds Read in generic_perform_write
                   https://syzkaller.appspot.com/bug?extid=4a2376bc62e59406c414
<2>  7374    Yes   WARNING in ext4_dirty_folio
                   https://syzkaller.appspot.com/bug?extid=ecab51a4a5b9f26eeaa1
<3>  840     Yes   possible deadlock in filemap_fault
                   https://syzkaller.appspot.com/bug?extid=7736960b837908f3a81d
<4>  719     Yes   KCSAN: data-race in generic_fillattr / shmem_mknod (2)
                   https://syzkaller.appspot.com/bug?extid=702361cf7e3d95758761
<5>  653     No    KCSAN: data-race in generic_fillattr / shmem_unlink (3)
                   https://syzkaller.appspot.com/bug?extid=f682b67a78ce05867e78
<6>  372     Yes   inconsistent lock state in __mmap_lock_do_trace_acquire_returned
                   https://syzkaller.appspot.com/bug?extid=76f802bc1dee8ba28a6e
<7>  114     Yes   WARNING in kunmap_local_indexed
                   https://syzkaller.appspot.com/bug?extid=691cb37358791bebebe6
<8>  62      Yes   BUG: unable to handle kernel NULL pointer dereference in __kmap_local_page_prot
                   https://syzkaller.appspot.com/bug?extid=b18872ea9631b5dcef3b
<9>  38      Yes   INFO: rcu detected stall in sys_openat (3)
                   https://syzkaller.appspot.com/bug?extid=23d96fb466ad56cbb5e5
<10> 18      Yes   kernel BUG in filemap_unaccount_folio
                   https://syzkaller.appspot.com/bug?extid=17a207d226b8a5fb0fd9

---
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.