git/object-store.h
Taylor Blau 42be681b33 packfile.c: prevent overflow in load_idx()
Prevent an overflow when locating a pack's CRC offset when the number
of packed items is greater than 2^32-1/hashsz by guarding the
computation with an `st_mult()`.

Note that to avoid truncating the result, the `crc_offset` member must
itself become a `size_t`. The only usage of this variable (besides the
assignment in `load_idx()`) is in `read_v2_anomalous_offsets()` in the
index-pack code. There we use the `crc_offset` as a pointer offset, so
we are already equipped to handle the type change.

Helped-by: Phillip Wood <phillip.wood@dunelm.org.uk>
Signed-off-by: Taylor Blau <me@ttaylorr.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2023-07-14 09:31:34 -07:00

12 lines
254 B
C

#ifndef OBJECT_STORE_H
#define OBJECT_STORE_H
#include "khash.h"
#include "dir.h"
#include "object-store-ll.h"
KHASH_INIT(odb_path_map, const char * /* key: odb_path */,
struct object_directory *, 1, fspathhash, fspatheq)
#endif /* OBJECT_STORE_H */