4.9-stable patches

4.9-stable patches

added patches:
	arch-alpha-termios-implement-bother-ibshift-and-termios2.patch
	btrfs-fix-cur_offset-in-the-error-case-for-nocow.patch
	btrfs-fix-data-corruption-due-to-cloning-of-eof-block.patch
	clockevents-drivers-i8253-add-support-for-pit-shutdown-quirk.patch
	configfs-replace-strncpy-with-memcpy.patch
	ext4-add-missing-brelse-add_new_gdb_meta_bg-s-error-path.patch
	ext4-add-missing-brelse-in-set_flexbg_block_bitmap-s-error-path.patch
	ext4-add-missing-brelse-update_backups-s-error-path.patch
	ext4-avoid-buffer-leak-in-ext4_orphan_add-after-prior-errors.patch
	ext4-avoid-possible-double-brelse-in-add_new_gdb-on-error-path.patch
	ext4-avoid-potential-extra-brelse-in-setup_new_flex_group_blocks.patch
	ext4-fix-buffer-leak-in-__ext4_read_dirblock-on-error-path.patch
	ext4-fix-buffer-leak-in-ext4_xattr_move_to_block-on-error-path.patch
	ext4-fix-missing-cleanup-if-ext4_alloc_flex_bg_array-fails-while-resizing.patch
	ext4-fix-possible-inode-leak-in-the-retry-loop-of-ext4_resize_fs.patch
	ext4-fix-possible-leak-of-s_journal_flag_rwsem-in-error-path.patch
	ext4-fix-possible-leak-of-sbi-s_group_desc_leak-in-error-path.patch
	ext4-release-bs.bh-before-re-using-in-ext4_xattr_block_find.patch
	fuse-fix-leaked-notify-reply.patch
	fuse-fix-use-after-free-in-fuse_direct_io.patch
	hugetlbfs-fix-kernel-bug-at-fs-hugetlbfs-inode.c-444.patch
	lib-ubsan.c-don-t-mark-__ubsan_handle_builtin_unreachable-as-noreturn.patch
	mm-migration-fix-migration-of-huge-pmd-shared-pages.patch
	mount-don-t-allow-copying-mnt_unbindable-mnt_locked-mounts.patch
	mount-prevent-mnt_detach-from-disconnecting-locked-mounts.patch
	mount-retest-mnt_locked-in-do_umount.patch
	nfsd-copy-and-clone-operations-require-the-saved-filehandle-to-be-set.patch
	rtc-hctosys-add-missing-range-error-reporting.patch
	sunrpc-correct-the-computation-for-page_ptr-when-truncating.patch
	termios-tty-tty_baudrate.c-fix-buffer-overrun.patch