[syzbot] Monthly btrfs report (Jul 2023)

[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, 4 new issues were detected and 3 were fixed.
In total, 51 issues are still open and 35 have been fixed so far.

Some of the still happening issues:

Ref  Crashes Repro Title
<1>  4533    Yes   kernel BUG in close_ctree
                   https://syzkaller.appspot.com/bug?extid=2665d678fffcc4608e18
<2>  1115    Yes   VFS: Busy inodes after unmount (use-after-free)
                   https://syzkaller.appspot.com/bug?extid=0af00f6a2cba2058b5db
<3>  804     Yes   WARNING in btrfs_space_info_update_bytes_may_use
                   https://syzkaller.appspot.com/bug?extid=8edfa01e46fd9fe3fbfb
<4>  678     Yes   WARNING in __kernel_write_iter
                   https://syzkaller.appspot.com/bug?extid=12e098239d20385264d3
<5>  373     Yes   WARNING in btrfs_block_rsv_release
                   https://syzkaller.appspot.com/bug?extid=dde7e853812ed57835ea
<6>  294     Yes   kernel BUG at fs/inode.c:LINE! (2)
                   https://syzkaller.appspot.com/bug?extid=c92c93d1f1aaaacdb9db
<7>  249     Yes   WARNING in lookup_inline_extent_backref
                   https://syzkaller.appspot.com/bug?extid=d6f9ff86c1d804ba2bc6
<8>  210     Yes   WARNING in btrfs_remove_chunk
                   https://syzkaller.appspot.com/bug?extid=e8582cc16881ec70a430
<9>  200     Yes   WARNING in btrfs_chunk_alloc
                   https://syzkaller.appspot.com/bug?extid=e8e56d5d31d38b5b47e7
<10> 142     Yes   INFO: task hung in lock_extent
                   https://syzkaller.appspot.com/bug?extid=eaa05fbc7563874b7ad2

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