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Date:   Fri, 28 Apr 2023 08:06:51 -0700
From:   syzbot <>
Subject: [syzbot] Monthly ext4 report (Apr 2023)

Hello ext4 maintainers/developers,

This is a 31-day syzbot report for the ext4 subsystem.
All related reports/information can be found at:

During the period, 6 new issues were detected and 0 were fixed.
In total, 72 issues are still open and 82 have been fixed so far.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  83130   Yes   possible deadlock in jbd2_journal_lock_updates
<2>  7208    Yes   WARNING in ext4_dirty_folio
<3>  5604    Yes   possible deadlock in dquot_commit (2)
<4>  773     Yes   INFO: task hung in __sync_dirty_buffer
<5>  476     No    possible deadlock in ext4_map_blocks
<6>  361     No    possible deadlock in ext4_multi_mount_protect
<7>  203     Yes   kernel BUG in ext4_get_group_info
<8>  93      Yes   kernel BUG in ext4_do_writepages
<9>  29      Yes   KASAN: slab-out-of-bounds Read in ext4_enable_quotas
<10> 22      Yes   WARNING in ext4_xattr_block_set (2)

This report is generated by a bot. It may contain errors.
See for more information about syzbot.
syzbot engineers can be reached at

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

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