[syzbot] [ext4] Monthly Report

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Hello ext4 maintainers/developers,

This is a 30-day syzbot report for ext4 subsystem.
All related reports/information can be found at:
https://syzkaller.appspot.com/upstream/s/ext4

During the period, 17 new issues were detected and 4 were fixed.
In total, 94 issues are still open and 92 have been fixed so far.

Some of the still happening issues:

Crashes Repro Title
81778   Yes   possible deadlock in jbd2_journal_lock_updates
              https://syzkaller.appspot.com/bug?extid=79e6bbabf3ce17357969
34932   Yes   possible deadlock in __jbd2_log_wait_for_space
              https://syzkaller.appspot.com/bug?extid=fa1bbda326271b8808c9
6768    Yes   WARNING in ext4_dirty_folio
              https://syzkaller.appspot.com/bug?extid=ecab51a4a5b9f26eeaa1
4301    Yes   possible deadlock in dquot_commit (2)
              https://syzkaller.appspot.com/bug?extid=70ff52e51b7e7714db8a
846     Yes   INFO: task hung in iterate_supers
              https://syzkaller.appspot.com/bug?extid=2349f5067b1772c1d8a5
817     Yes   BUG: soft lockup in smp_call_function
              https://syzkaller.appspot.com/bug?extid=cce3691658bef1b12ac9
550     Yes   INFO: task hung in __sync_dirty_buffer
              https://syzkaller.appspot.com/bug?extid=91dccab7c64e2850a4e5
388     No    possible deadlock in ext4_map_blocks
              https://syzkaller.appspot.com/bug?extid=6de5025c31d33047d2a4
168     Yes   possible deadlock in process_measurement (3)
              https://syzkaller.appspot.com/bug?extid=ccfcdc8958f74084f16d
167     No    INFO: task hung in path_openat (7)
              https://syzkaller.appspot.com/bug?extid=950a0cdaa2fdd14f5bdc

---
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@xxxxxxxxxxxxxxxx.



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