[GIT PULL] Btrfs fixes for 5.8-rc7

[David Sterba <dsterba@suse.com>]

Hi,

I've selected a few resouce leak fixes from recent patches, all are
stable material. The problems have been observed during testing or have
a reproducer.

Please pull, thanks.

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The following changes since commit d77765911385b65fc82d74ab71b8983cddfe0b58:

  btrfs: wire up iter_file_splice_write (2020-07-09 19:57:58 +0200)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux.git for-5.8-rc6-tag

for you to fetch changes up to 48cfa61b58a1fee0bc49eef04f8ccf31493b7cdd:

  btrfs: fix mount failure caused by race with umount (2020-07-21 22:08:54 +0200)

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Boris Burkov (1):
      btrfs: fix mount failure caused by race with umount

Filipe Manana (1):
      btrfs: fix double free on ulist after backref resolution failure

Qu Wenruo (1):
      btrfs: qgroup: fix data leak caused by race between writeback and truncate

Robbie Ko (1):
      btrfs: fix page leaks after failure to lock page for delalloc

 fs/btrfs/backref.c   |  1 +
 fs/btrfs/extent_io.c |  3 ++-
 fs/btrfs/inode.c     | 23 ++++++++++-------------
 fs/btrfs/volumes.c   |  8 ++++++++
 4 files changed, 21 insertions(+), 14 deletions(-)