On Tue, Feb 06, 2018 at 11:09:37AM -0800, Jin Qian wrote: > From: Jin Qian <jinqian@xxxxxxxxxx> > > partial backport from 21fc61c73c3903c4c312d0802da01ec2b323d174 upstream > to v4.4 to prevent virt_to_page on highmem. > > ext4_encrypted_follow_link uses kmap() for cpage > caddr = kmap(cpage); > > _ext4_fname_disk_to_usr calls virt_to_page on the kmapped address. > _ext4_fname_disk_to_usr() > ext4_fname_decrypt() > sg_init_one() > sg_init_one(&src_sg, iname->name, iname->len); > sg_set_page(sg, virt_to_page(buf), buflen, offset_in_page(buf)); > > Cc: stable@xxxxxxxxxxxxxxx > Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx> > Signed-off-by: Jin Qian <jinqian@xxxxxxxxxx> > Signed-off-by: Jin Qian <jinqian@xxxxxxxxxxx> Ted, any objection to this patch? thanks, greg k-h