On Tue, Mar 07, 2023 at 10:17:46PM -0800, Eric Biggers wrote:
From: Eric Biggers ebiggers@google.com
commit 844545c51a5b2a524b22a2fe9d0b353b827d24b4 upstream.
When writing a page from an encrypted file that is using filesystem-layer encryption (not inline encryption), f2fs encrypts the pagecache page into a bounce page, then writes the bounce page.
It also passes the bounce page to wbc_account_cgroup_owner(). That's incorrect, because the bounce page is a newly allocated temporary page that doesn't have the memory cgroup of the original pagecache page. This makes wbc_account_cgroup_owner() not account the I/O to the owner of the pagecache page as it should.
Fix this by always passing the pagecache page to wbc_account_cgroup_owner().
Fixes: 578c647879f7 ("f2fs: implement cgroup writeback support") Cc: stable@vger.kernel.org Reported-by: Matthew Wilcox (Oracle) willy@infradead.org Signed-off-by: Eric Biggers ebiggers@google.com Acked-by: Tejun Heo tj@kernel.org Reviewed-by: Chao Yu chao@kernel.org Signed-off-by: Jaegeuk Kim jaegeuk@kernel.org
fs/f2fs/data.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
Now queued up, thanks.
greg k-h