Commit e9cdd307 authored Apr 26, 2017 by Yunlei He Committed by Jaegeuk Kim May 03, 2017

f2fs: fix a mount fail for wrong next_scan_nid



-write_checkpoint
   -do_checkpoint
      -next_free_nid    <--- something wrong with next free nid

-f2fs_fill_super
   -build_node_manager
      -build_free_nids
          -get_current_nat_page
             -__get_meta_page   <--- attempt to access beyond end of device

Signed-off-by: Yunlei He <heyunlei@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>

parent baaabbb7

fs/f2fs/node.c

+3 −0

Original line number	Diff line number	Diff line
		@@ -1955,6 +1955,9 @@ static void __build_free_nids(struct f2fs_sb_info *sbi, bool sync, bool mount)
		int i = 0;
		nid_t nid = nm_i->next_scan_nid;

		if (unlikely(nid >= nm_i->max_nid))
		nid = 0;

		/* Enough entries */
		if (nm_i->nid_cnt[FREE_NID_LIST] >= NAT_ENTRY_PER_BLOCK)
		return;