[syzbot] Monthly ext4 report (Jul 2026)

[syzbot] Monthly ext4 report (Jul 2026)

[syzbot]

Hello ext4 maintainers/developers,

This is a 31-day syzbot report for the ext4 subsystem.
All related reports/information can be found at:
https://syzkaller.appspot.com/upstream/s/ext4

During the period, 3 new issues were detected and 0 were fixed.
In total, 44 issues are still open and 178 have already been fixed.
There are also 8 low-priority issues.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  16116   Yes   possible deadlock in ext4_writepages (2)
                   https://syzkaller.appspot.com/bug?extid=eb5b4ef634a018917f3c
<2>  7757    Yes   KASAN: out-of-bounds Read in ext4_xattr_set_entry
                   https://syzkaller.appspot.com/bug?extid=f792df426ff0f5ceb8d1
<3>  132     Yes   WARNING in ext4_iomap_begin (3)
                   https://syzkaller.appspot.com/bug?extid=626aa13bf52efc3aa86e
<4>  30      No    possible deadlock in evict (4)
                   https://syzkaller.appspot.com/bug?extid=a30a00d3e694e4fa1315
<5>  7       Yes   divide error in qnx6_mmi_fill_super
                   https://syzkaller.appspot.com/bug?extid=6a0633f11d3fb88860bf
<6>  4       No    WARNING in jbd2_journal_dirty_metadata (3)
                   https://syzkaller.appspot.com/bug?extid=a5f824f1c49dd97fcff0
<7>  3       Yes   INFO: task hung in ext4_write_end
                   https://syzkaller.appspot.com/bug?extid=16bf7cd0ebeb1de93aa5
<8>  2998    Yes   INFO: task hung in sync_inodes_sb (5)
                   https://syzkaller.appspot.com/bug?extid=30476ec1b6dc84471133
<9>  2204    Yes   INFO: task hung in jbd2_journal_commit_transaction (5)
                   https://syzkaller.appspot.com/bug?extid=3071bdd0a9953bc0d177
<10> 810     Yes   possible deadlock in do_writepages (2)
                   https://syzkaller.appspot.com/bug?extid=756f498a88797cda9299

---
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.