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Merge branch 'es/unpack-trees-oob-fix' 

The code that tries to skip over the entries for the paths in a
single directory using the cache-tree was not careful enough
against corrupt index file.

* es/unpack-trees-oob-fix:
  unpack-trees: watch for out-of-range index position
This commit is contained in:
Junio C Hamano 2020-01-22 15:07:31 -08:00
parent 42096c778d 573117dfa5
commit 36da2a8635
1 changed files with 4 additions and 2 deletions
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6
unpack-trees.c
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@ -696,9 +696,11 @@ static int index_pos_by_traverse_info(struct name_entry *names,
if (pos >= 0)
BUG("This is a directory and should not exist in index");
pos = -pos - 1;
if (!starts_with(o->src_index->cache[pos]->name, name.buf) ||
if (pos >= o->src_index->cache_nr ||
!starts_with(o->src_index->cache[pos]->name, name.buf) ||
(pos > 0 && starts_with(o->src_index->cache[pos-1]->name, name.buf)))
BUG("pos must point at the first entry in this directory");
BUG("pos %d doesn't point to the first entry of %s in index",
pos, name.buf);
strbuf_release(&name);
return pos;
}