f2fs: not allow to write illegal blkaddr
we came across an error as below:
[build_nat_area_bitmap:1710] nid[0x 1718] addr[0x 1c18ddc] ino[0x 1718]
[build_nat_area_bitmap:1710] nid[0x 1719] addr[0x 1c193d5] ino[0x 1719]
[build_nat_area_bitmap:1710] nid[0x 171a] addr[0x 1c1736e] ino[0x 171a]
[build_nat_area_bitmap:1710] nid[0x 171b] addr[0x
58b3ee8f] ino[0x815f92ed]
[build_nat_area_bitmap:1710] nid[0x 171c] addr[0x fcdc94b] ino[0x49366377]
[build_nat_area_bitmap:1710] nid[0x 171d] addr[0x
7cd2facf] ino[0xb3c55300]
[build_nat_area_bitmap:1710] nid[0x 171e] addr[0x
bd4e25d0] ino[0x77c34c09]
... ...
[build_nat_area_bitmap:1710] nid[0x 1718] addr[0x 1c18ddc] ino[0x 1718]
[build_nat_area_bitmap:1710] nid[0x 1719] addr[0x 1c193d5] ino[0x 1719]
[build_nat_area_bitmap:1710] nid[0x 171a] addr[0x 1c1736e] ino[0x 171a]
[build_nat_area_bitmap:1710] nid[0x 171b] addr[0x
58b3ee8f] ino[0x815f92ed]
[build_nat_area_bitmap:1710] nid[0x 171c] addr[0x fcdc94b] ino[0x49366377]
[build_nat_area_bitmap:1710] nid[0x 171d] addr[0x
7cd2facf] ino[0xb3c55300]
[build_nat_area_bitmap:1710] nid[0x 171e] addr[0x
bd4e25d0] ino[0x77c34c09]
One nat block may be stepped by a data block, so this patch forbid to
write if the blkaddr is illegal
Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>