[syzbot] Monthly ext4 report (Jun 2026)

[syzbot] Monthly ext4 report (Jun 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, 45 issues are still open and 175 have already been fixed.
There are also 8 low-priority issues.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  10098   Yes   possible deadlock in ext4_writepages (2)
                   https://syzkaller.appspot.com/bug?extid=eb5b4ef634a018917f3c
<2>  7580    Yes   KASAN: out-of-bounds Read in ext4_xattr_set_entry
                   https://syzkaller.appspot.com/bug?extid=f792df426ff0f5ceb8d1
<3>  3212    Yes   kernel BUG in ext4_do_writepages
                   https://syzkaller.appspot.com/bug?extid=d1da16f03614058fdc48
<4>  481     Yes   possible deadlock in ext4_evict_inode (5)
                   https://syzkaller.appspot.com/bug?extid=212e8f62790f8e0bc63b
<5>  406     Yes   possible deadlock in wait_transaction_locked (3)
                   https://syzkaller.appspot.com/bug?extid=5d19358d7eb30ffb0cc5
<6>  139     Yes   KMSAN: uninit-value in fscrypt_crypt_data_unit
                   https://syzkaller.appspot.com/bug?extid=7add5c56bc2a14145d20
<7>  20      No    possible deadlock in evict (4)
                   https://syzkaller.appspot.com/bug?extid=a30a00d3e694e4fa1315
<8>  10      No    WARNING in ext4_write_inode (3)
                   https://syzkaller.appspot.com/bug?extid=070d9738dbe6a10fadc8
<9>  8       Yes   INFO: task hung in block_read_full_folio (3)
                   https://syzkaller.appspot.com/bug?extid=03afbb29537f0336b7ad
<10> 2951    Yes   INFO: task hung in sync_inodes_sb (5)
                   https://syzkaller.appspot.com/bug?extid=30476ec1b6dc84471133

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