[syzbot] Monthly btrfs report (May 2026)

[syzbot]

Hello btrfs maintainers/developers,

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

During the period, 3 new issues were detected and 0 were fixed.
In total, 32 issues are still open and 114 have already been fixed.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  11326   Yes   BUG: MAX_LOCKDEP_CHAIN_HLOCKS too low! (7)
                   https://syzkaller.appspot.com/bug?extid=74f79df25c37437e4d5a
<2>  5639    Yes   WARNING in btrfs_space_info_update_bytes_may_use
                   https://syzkaller.appspot.com/bug?extid=8edfa01e46fd9fe3fbfb
<3>  1345    Yes   WARNING in btrfs_create_pending_block_groups (2)
                   https://syzkaller.appspot.com/bug?extid=b0643a1387dac0572b27
<4>  783     Yes   WARNING in btrfs_chunk_alloc
                   https://syzkaller.appspot.com/bug?extid=e8e56d5d31d38b5b47e7
<5>  532     Yes   WARNING in cleanup_transaction
                   https://syzkaller.appspot.com/bug?extid=021d10c4d4edc87daa03
<6>  473     Yes   possible deadlock in lookup_slow (3)
                   https://syzkaller.appspot.com/bug?extid=65459fd3b61877d717a3
<7>  472     Yes   WARNING in __btrfs_free_extent (3)
                   https://syzkaller.appspot.com/bug?extid=480676efc0c3a76b5214
<8>  457     Yes   WARNING in btrfs_remove_chunk
                   https://syzkaller.appspot.com/bug?extid=e8582cc16881ec70a430
<9>  271     Yes   WARNING in btrfs_release_global_block_rsv (2)
                   https://syzkaller.appspot.com/bug?extid=48ed002119c0f19daf63
<10> 163     Yes   WARNING in btrfs_run_delayed_refs (2)
                   https://syzkaller.appspot.com/bug?extid=810ea5febd3b79bdd384

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