mainline inclusion
from mainline-v5.19-rc1
commit c230a4a8
category: bugfix
bugzilla: 187372, https://gitee.com/openeuler/kernel/issues/I5K0OM
CVE: NA

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c230a4a85bcdbfc1a7415deec6caf04e8fca1301

--------------------------------

Ever since we added shadown format buffers to the log items, log
items need to handle the item being released with shadow buffers
attached. Due to the fact this requirement was added at the same
time we added new rmap/reflink intents, we missed the cleanup of
those items.

In theory, this means shadow buffers can be leaked in a very small
window when a shutdown is initiated. Testing with KASAN shows this
leak does not happen in practice - we haven't identified a single
leak in several years of shutdown testing since ~v4.8 kernels.

However, the intent whiteout cleanup mechanism results in every
cancelled intent in exactly the same state as this tiny race window
creates and so if intents down clean up shadow buffers on final
release we will leak the shadow buffer for just about every intent
we create.

Hence we start with this patch to close this condition off and
ensure that when whiteouts start to be used we don't leak lots of
memory.
Signed-off-by: NDave Chinner <dchinner@redhat.com>
Reviewed-by: NDarrick J. Wong <djwong@kernel.org>
Reviewed-by: NAllison Henderson <allison.henderson@oracle.com>
Signed-off-by: NDave Chinner <david@fromorbit.com>

conflicts:
	fs/xfs/xfs_bmap_item.c
	fs/xfs/xfs_icreate_item.c
	fs/xfs/xfs_refcount_item.c
	fs/xfs/xfs_rmap_item.c
Signed-off-by: NLi Nan <linan122@huawei.com>
Reviewed-by: NYang Erkun <yangerkun@huawei.com>
Reviewed-by: NZhang Yi <yi.zhang@huawei.com>
Signed-off-by: NJialin Zhang <zhangjialin11@huawei.com>
(cherry picked from commit 3a075fcc)