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f2fs: do not recover wrong data index

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During the roll-forward recovery, if we found a new data index written fsync
lastly, we need to recover new block address.
But, if that address was corrupted, we should not recover that.
Otherwise, f2fs gets kernel panic from:

 In check_index_in_prev_nodes(),

    sentry = get_seg_entry(sbi, segno);
             --------------------------> out-of-range segno.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim 2015-04-01 19:38:20 -07:00
parent 418f6c2770
commit e03b07d908
1 changed files with 3 additions and 1 deletions
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4
fs/f2fs/recovery.c
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@ -395,7 +395,9 @@ static int do_recover_data(struct f2fs_sb_info *sbi, struct inode *inode,
src = datablock_addr(dn.node_page, dn.ofs_in_node);
dest = datablock_addr(page, dn.ofs_in_node);
if (src != dest && dest != NEW_ADDR && dest != NULL_ADDR) {
if (src != dest && dest != NEW_ADDR && dest != NULL_ADDR &&
dest >= MAIN_BLKADDR(sbi) && dest < MAX_BLKADDR(sbi)) {
if (src == NULL_ADDR) {
err = reserve_new_block(&dn);
/* We should not get -ENOSPC */