Merge tag 'for-6.17-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux

Pull btrfs fixes from David Sterba:

 - fix delayed inode tracking in xarray, eviction can race with
   insertion and leave behind a disconnected inode

 - on systems with large page (64K) and small block size (4K) fix
   compression read that can return partially filled folio

 - slightly relax compression option format for backward compatibility,
   allow to specify level for LZO although there's only one

 - fix simple quota accounting of compressed extents

 - validate minimum device size in 'device add'

 - update maintainers' entry

* tag 'for-6.17-rc5-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux:
  btrfs: don't allow adding block device of less than 1 MB
  MAINTAINERS: update btrfs entry
  btrfs: fix subvolume deletion lockup caused by inodes xarray race
  btrfs: fix corruption reading compressed range when block size is smaller than page size
  btrfs: accept and ignore compression level for lzo
  btrfs: fix squota compressed stats leak

1 files changed, 11 insertions, 1 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index dd82dcc7b2b7..e7218e78bff4 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -5696,7 +5696,17 @@ static void btrfs_del_inode_from_root(struct btrfs_inode *inode)
 	bool empty = false;
 
 	xa_lock(&root->inodes);
-	entry = __xa_erase(&root->inodes, btrfs_ino(inode));
+	/*
+	 * This btrfs_inode is being freed and has already been unhashed at this
+	 * point. It's possible that another btrfs_inode has already been
+	 * allocated for the same inode and inserted itself into the root, so
+	 * don't delete it in that case.
+	 *
+	 * Note that this shouldn't need to allocate memory, so the gfp flags
+	 * don't really matter.
+	 */
+	entry = __xa_cmpxchg(&root->inodes, btrfs_ino(inode), inode, NULL,
+			     GFP_ATOMIC);
 	if (entry == inode)
 		empty = xa_empty(&root->inodes);
 	xa_unlock(&root->inodes);