[syzbot] Monthly ext4 report (Sep 2026)

[syzbot] Monthly ext4 report (Sep 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 1 were fixed.
In total, 39 issues are still open and 184 have already been fixed.
There are also 8 low-priority issues.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  21100   Yes   possible deadlock in ext4_writepages (2)
                   https://syzkaller.appspot.com/bug?extid=eb5b4ef634a018917f3c
<2>  7962    Yes   KASAN: out-of-bounds Read in ext4_xattr_set_entry
                   https://syzkaller.appspot.com/bug?extid=f792df426ff0f5ceb8d1
<3>  4881    Yes   kernel BUG in ext4_do_writepages
                   https://syzkaller.appspot.com/bug?extid=d1da16f03614058fdc48
<4>  2502    Yes   possible deadlock in ext4_xattr_set_handle (7)
                   https://syzkaller.appspot.com/bug?extid=f0b58a1f5075a90dd9a5
<5>  228     Yes   WARNING in ext4_iomap_begin (3)
                   https://syzkaller.appspot.com/bug?extid=626aa13bf52efc3aa86e
<6>  82      Yes   WARNING in ext4_mb_load_buddy_gfp
                   https://syzkaller.appspot.com/bug?extid=fd3f70a4509fca8c265d
<7>  16      Yes   INFO: task hung in ext4_write_end
                   https://syzkaller.appspot.com/bug?extid=16bf7cd0ebeb1de93aa5
<8>  3026    Yes   INFO: task hung in sync_inodes_sb (5)
                   https://syzkaller.appspot.com/bug?extid=30476ec1b6dc84471133
<9>  481     Yes   kernel BUG in ext4_mb_use_inode_pa (2)
                   https://syzkaller.appspot.com/bug?extid=d79019213609e7056a19
<10> 111     Yes   WARNING in ext4_journal_check_start (2)
                   https://syzkaller.appspot.com/bug?extid=b75d75f957975f3d40e3

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