[syzbot] Monthly ext4 report (Aug 2026)

[syzbot] Monthly ext4 report (Aug 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, 2 new issues were detected and 0 were fixed.
In total, 41 issues are still open and 179 have already been fixed.
There are also 8 low-priority issues.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  19578   Yes   possible deadlock in ext4_writepages (2)
                   https://syzkaller.appspot.com/bug?extid=eb5b4ef634a018917f3c
<2>  7874    Yes   KASAN: out-of-bounds Read in ext4_xattr_set_entry
                   https://syzkaller.appspot.com/bug?extid=f792df426ff0f5ceb8d1
<3>  3863    Yes   kernel BUG in ext4_do_writepages
                   https://syzkaller.appspot.com/bug?extid=d1da16f03614058fdc48
<4>  2206    Yes   possible deadlock in ext4_xattr_set_handle (7)
                   https://syzkaller.appspot.com/bug?extid=f0b58a1f5075a90dd9a5
<5>  147     Yes   WARNING in ext4_iomap_begin (3)
                   https://syzkaller.appspot.com/bug?extid=626aa13bf52efc3aa86e
<6>  132     Yes   INFO: task hung in sb_start_write (2)
                   https://syzkaller.appspot.com/bug?extid=b3fba2e269970207b61d
<7>  43      No    possible deadlock in evict (4)
                   https://syzkaller.appspot.com/bug?extid=a30a00d3e694e4fa1315
<8>  21      No    WARNING in jbd2_journal_dirty_metadata (3)
                   https://syzkaller.appspot.com/bug?extid=a5f824f1c49dd97fcff0
<9>  21      Yes   kernel BUG in ext4_write_inline_data (5)
                   https://syzkaller.appspot.com/bug?extid=53c8bd6136cfbe85197e
<10> 11      Yes   INFO: task hung in block_read_full_folio (3)
                   https://syzkaller.appspot.com/bug?extid=03afbb29537f0336b7ad

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