f2fs: fix to do sanity check in is_alive()

mainline inclusion
from mainline-v5.16-rc1
commit 77900c45
category: bugfix
bugzilla: 186264,https://gitee.com/openeuler/kernel/issues/I4VCWN
CVE: CVE-2021-44879

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=77900c45ee5cd5da63bd4d818a41dbdf367e81cd



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In fuzzed image, SSA table may indicate that a data block belongs to
invalid node, which node ID is out-of-range (0, 1, 2 or max_nid), in
order to avoid migrating inconsistent data in such corrupted image,
let's do sanity check anyway before data block migration.

Cc: stable@vger.kernel.org
Signed-off-by: Chao Yu <chao@kernel.org>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Signed-off-by: Guo Xuenan <guoxuenan@huawei.com>
Reviewed-by: Xiu Jianfeng <xiujianfeng@huawei.com>
Reviewed-by: fang wei <fangwei1@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>