Pull UBI, UBIFS and JFFS2 updates from Richard Weinberger:
 "UBI:
   - Be less stupid when placing a fastmap anchor
   - Try harder to get an empty PEB in case of contention
   - Make ubiblock to warn if image is not a multiple of 512

  UBIFS:
   - Various fixes in error paths

  JFFS2:
   - Various fixes in error paths"

* tag 'upstream-5.4-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rw/ubifs:
  jffs2: Fix memory leak in jffs2_scan_eraseblock() error path
  jffs2: Remove jffs2_gc_fetch_page and jffs2_gc_release_page
  jffs2: Fix possible null-pointer dereferences in jffs2_add_frag_to_fragtree()
  ubi: block: Warn if volume size is not multiple of 512
  ubifs: Fix memory leak bug in alloc_ubifs_info() error path
  ubifs: Fix memory leak in __ubifs_node_verify_hmac error path
  ubifs: Fix memory leak in read_znode() error path
  ubi: ubi_wl_get_peb: Increase the number of attempts while getting PEB
  ubi: Don't do anchor move within fastmap area
  ubifs: Remove redundant assignment to pointer fname