Commit 77900c45 authored by Chao Yu's avatar Chao Yu Committed by Jaegeuk Kim
Browse files

f2fs: fix to do sanity check in is_alive() 



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: default avatarChao Yu <chao@kernel.org>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent f6db4307

fs/f2fs/gc.c

+3 −0
Original line number Diff line number Diff line
@@ -1026,6 +1026,9 @@ static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum, 
		set_sbi_flag(sbi, SBI_NEED_FSCK);

	}



	if (f2fs_check_nid_range(sbi, dni->ino))

		return false;



	*nofs = ofs_of_node(node_page);

	source_blkaddr = data_blkaddr(NULL, node_page, ofs_in_node);

	f2fs_put_page(node_page, 1);