Am 30.05.2013 15:34, schrieb Felipe Contreras:
> We don't free 'istate->cache' properly.
>
> Apparently 'initialized' doesn't really mean initialized, but loaded, or
> rather 'not-empty', and the cache can be used even if it's not
> 'initialized', so we can't rely on this variable to keep track of the
> 'istate->cache'.
>
> So assume it always has data, and free it before overwriting it.
>
> Signed-off-by: Felipe Contreras <[email protected]>
> ---
> read-cache.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
> diff --git a/read-cache.c b/read-cache.c
> index 04ed561..e5dc96f 100644
> --- a/read-cache.c
> +++ b/read-cache.c
> @@ -1449,6 +1449,7 @@ int read_index_from(struct index_state *istate, const
> char *path)
> istate->version = ntohl(hdr->hdr_version);
> istate->cache_nr = ntohl(hdr->hdr_entries);
> istate->cache_alloc = alloc_nr(istate->cache_nr);
> + free(istate->cache);
With that change, callers of read_index_from need to set ->cache to
NULL for uninitialized (on-stack) index_state variables. They only had
to set ->initialized to 0 before in that situation. It this chunk safe
for all existing callers? Shouldn't the same free in discard_index
(added below) be enough?
> istate->cache = xcalloc(istate->cache_alloc, sizeof(struct cache_entry
> *));
> istate->initialized = 1;
>
> @@ -1510,6 +1511,9 @@ int discard_index(struct index_state *istate)
>
> for (i = 0; i < istate->cache_nr; i++)
> free(istate->cache[i]);
> + free(istate->cache);
> + istate->cache = NULL;
> + istate->cache_alloc = 0;
> resolve_undo_clear_index(istate);
> istate->cache_nr = 0;
> istate->cache_changed = 0;
I was preparing a similar change, looks good. There is a comment at
the end of discard_index() that becomes wrong due to that patch,
though -- better remove it as well. It was already outdated as it
mentioned active_cache, while the function can be used with any
index_state.
diff --git a/read-cache.c b/read-cache.c
index e5dc96f..0f868af 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -1522,8 +1522,6 @@ int discard_index(struct index_state *istate)
free_name_hash(istate);
cache_tree_free(&(istate->cache_tree));
istate->initialized = 0;
-
- /* no need to throw away allocated active_cache */
return 0;
}
--
To unsubscribe from this list: send the line "unsubscribe git" in
the body of a message to [email protected]
More majordomo info at http://vger.kernel.org/majordomo-info.html
