Merge tag 'bcachefs-2024-10-31' of git://evilpiepirate.org/bcachefs

Pull bcachefs fixes from Kent Overstreet:
 "Various syzbot fixes, and the more notable ones:

   - Fix for pointers in an extent overflowing the max (16) on a
     filesystem with many devices: we were creating too many cached
     copies when moving data around. Now, we only create at most one
     cached copy if there's a promote target set.

     Caching will be a bit broken for reflinked data until 6.13: I have
     larger series queued up which significantly improves the plumbing
     for data options down into the extent (bch_extent_rebalance) to fix
     this.

   - Fix for deadlock on -ENOSPC on tiny filesystems

     Allocation from the partial open_bucket list wasn't correctly
     accounting partial open_buckets as free: this fixes the main cause
     of tests timing out in the automated tests"

* tag 'bcachefs-2024-10-31' of git://evilpiepirate.org/bcachefs:
  bcachefs: Fix NULL ptr dereference in btree_node_iter_and_journal_peek
  bcachefs: fix possible null-ptr-deref in __bch2_ec_stripe_head_get()
  bcachefs: Fix deadlock on -ENOSPC w.r.t. partial open buckets
  bcachefs: Don't filter partial list buckets in open_buckets_to_text()
  bcachefs: Don't keep tons of cached pointers around
  bcachefs: init freespace inited bits to 0 in bch2_fs_initialize
  bcachefs: Fix unhandled transaction restart in fallocate
  bcachefs: Fix UAF in bch2_reconstruct_alloc()
  bcachefs: fix null-ptr-deref in have_stripes()
  bcachefs: fix shift oob in alloc_lru_idx_fragmentation
  bcachefs: Fix invalid shift in validate_sb_layout()

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