Merge branch 'jc/maint-1.6.0-keep-pack' into maint-1.6.1
[git/git.git] / builtin-pack-objects.c
index ad3f8e7..d155345 100644 (file)
@@ -195,16 +195,16 @@ static int check_pack_inflate(struct packed_git *p,
        int st;
 
        memset(&stream, 0, sizeof(stream));
-       inflateInit(&stream);
+       git_inflate_init(&stream);
        do {
                in = use_pack(p, w_curs, offset, &stream.avail_in);
                stream.next_in = in;
                stream.next_out = fakebuf;
                stream.avail_out = sizeof(fakebuf);
-               st = inflate(&stream, Z_FINISH);
+               st = git_inflate(&stream, Z_FINISH);
                offset += stream.next_in - in;
        } while (st == Z_OK || st == Z_BUF_ERROR);
-       inflateEnd(&stream);
+       git_inflate_end(&stream);
        return (st == Z_STREAM_END &&
                stream.total_out == expect &&
                stream.total_in == len) ? 0 : -1;
@@ -286,6 +286,7 @@ static unsigned long write_object(struct sha1file *f,
                                 */
 
        if (!to_reuse) {
+               no_reuse:
                if (!usable_delta) {
                        buf = read_sha1_file(entry->idx.sha1, &type, &size);
                        if (!buf)
@@ -367,46 +368,60 @@ static unsigned long write_object(struct sha1file *f,
                struct revindex_entry *revidx;
                off_t offset;
 
-               if (entry->delta) {
+               if (entry->delta)
                        type = (allow_ofs_delta && entry->delta->idx.offset) ?
                                OBJ_OFS_DELTA : OBJ_REF_DELTA;
-                       reused_delta++;
-               }
                hdrlen = encode_header(type, entry->size, header);
+
                offset = entry->in_pack_offset;
                revidx = find_pack_revindex(p, offset);
                datalen = revidx[1].offset - offset;
                if (!pack_to_stdout && p->index_version > 1 &&
-                   check_pack_crc(p, &w_curs, offset, datalen, revidx->nr))
-                       die("bad packed object CRC for %s", sha1_to_hex(entry->idx.sha1));
+                   check_pack_crc(p, &w_curs, offset, datalen, revidx->nr)) {
+                       error("bad packed object CRC for %s", sha1_to_hex(entry->idx.sha1));
+                       unuse_pack(&w_curs);
+                       goto no_reuse;
+               }
+
                offset += entry->in_pack_header_size;
                datalen -= entry->in_pack_header_size;
+               if (!pack_to_stdout && p->index_version == 1 &&
+                   check_pack_inflate(p, &w_curs, offset, datalen, entry->size)) {
+                       error("corrupt packed object for %s", sha1_to_hex(entry->idx.sha1));
+                       unuse_pack(&w_curs);
+                       goto no_reuse;
+               }
+
                if (type == OBJ_OFS_DELTA) {
                        off_t ofs = entry->idx.offset - entry->delta->idx.offset;
                        unsigned pos = sizeof(dheader) - 1;
                        dheader[pos] = ofs & 127;
                        while (ofs >>= 7)
                                dheader[--pos] = 128 | (--ofs & 127);
-                       if (limit && hdrlen + sizeof(dheader) - pos + datalen + 20 >= limit)
+                       if (limit && hdrlen + sizeof(dheader) - pos + datalen + 20 >= limit) {
+                               unuse_pack(&w_curs);
                                return 0;
+                       }
                        sha1write(f, header, hdrlen);
                        sha1write(f, dheader + pos, sizeof(dheader) - pos);
                        hdrlen += sizeof(dheader) - pos;
+                       reused_delta++;
                } else if (type == OBJ_REF_DELTA) {
-                       if (limit && hdrlen + 20 + datalen + 20 >= limit)
+                       if (limit && hdrlen + 20 + datalen + 20 >= limit) {
+                               unuse_pack(&w_curs);
                                return 0;
+                       }
                        sha1write(f, header, hdrlen);
                        sha1write(f, entry->delta->idx.sha1, 20);
                        hdrlen += 20;
+                       reused_delta++;
                } else {
-                       if (limit && hdrlen + datalen + 20 >= limit)
+                       if (limit && hdrlen + datalen + 20 >= limit) {
+                               unuse_pack(&w_curs);
                                return 0;
+                       }
                        sha1write(f, header, hdrlen);
                }
-
-               if (!pack_to_stdout && p->index_version == 1 &&
-                   check_pack_inflate(p, &w_curs, offset, datalen, entry->size))
-                       die("corrupt packed object for %s", sha1_to_hex(entry->idx.sha1));
                copy_pack_data(f, p, &w_curs, offset, datalen);
                unuse_pack(&w_curs);
                reused++;
@@ -473,9 +488,8 @@ static void write_pack_file(void)
                } else {
                        char tmpname[PATH_MAX];
                        int fd;
-                       snprintf(tmpname, sizeof(tmpname),
-                                "%s/pack/tmp_pack_XXXXXX", get_object_directory());
-                       fd = xmkstemp(tmpname);
+                       fd = odb_mkstemp(tmpname, sizeof(tmpname),
+                                        "pack/tmp_pack_XXXXXX");
                        pack_tmp_name = xstrdup(tmpname);
                        f = sha1fd(fd, pack_tmp_name);
                }
@@ -1017,9 +1031,11 @@ static void check_object(struct object_entry *entry)
                 * We want in_pack_type even if we do not reuse delta
                 * since non-delta representations could still be reused.
                 */
-               used = unpack_object_header_gently(buf, avail,
+               used = unpack_object_header_buffer(buf, avail,
                                                   &entry->in_pack_type,
                                                   &entry->size);
+               if (used == 0)
+                       goto give_up;
 
                /*
                 * Determine if this is a delta and if so whether we can
@@ -1031,6 +1047,8 @@ static void check_object(struct object_entry *entry)
                        /* Not a delta hence we've already got all we need. */
                        entry->type = entry->in_pack_type;
                        entry->in_pack_header_size = used;
+                       if (entry->type < OBJ_COMMIT || entry->type > OBJ_BLOB)
+                               goto give_up;
                        unuse_pack(&w_curs);
                        return;
                case OBJ_REF_DELTA:
@@ -1047,19 +1065,25 @@ static void check_object(struct object_entry *entry)
                        ofs = c & 127;
                        while (c & 128) {
                                ofs += 1;
-                               if (!ofs || MSB(ofs, 7))
-                                       die("delta base offset overflow in pack for %s",
-                                           sha1_to_hex(entry->idx.sha1));
+                               if (!ofs || MSB(ofs, 7)) {
+                                       error("delta base offset overflow in pack for %s",
+                                             sha1_to_hex(entry->idx.sha1));
+                                       goto give_up;
+                               }
                                c = buf[used_0++];
                                ofs = (ofs << 7) + (c & 127);
                        }
-                       if (ofs >= entry->in_pack_offset)
-                               die("delta base offset out of bound for %s",
-                                   sha1_to_hex(entry->idx.sha1));
                        ofs = entry->in_pack_offset - ofs;
+                       if (ofs <= 0 || ofs >= entry->in_pack_offset) {
+                               error("delta base offset out of bound for %s",
+                                     sha1_to_hex(entry->idx.sha1));
+                               goto give_up;
+                       }
                        if (reuse_delta && !entry->preferred_base) {
                                struct revindex_entry *revidx;
                                revidx = find_pack_revindex(p, ofs);
+                               if (!revidx)
+                                       goto give_up;
                                base_ref = nth_packed_object_sha1(p, revidx->nr);
                        }
                        entry->in_pack_header_size = used + used_0;
@@ -1079,6 +1103,7 @@ static void check_object(struct object_entry *entry)
                         */
                        entry->type = entry->in_pack_type;
                        entry->delta = base_entry;
+                       entry->delta_size = entry->size;
                        entry->delta_sibling = base_entry->delta_child;
                        base_entry->delta_child = entry;
                        unuse_pack(&w_curs);
@@ -1093,6 +1118,8 @@ static void check_object(struct object_entry *entry)
                         */
                        entry->size = get_size_from_delta(p, &w_curs,
                                        entry->in_pack_offset + entry->in_pack_header_size);
+                       if (entry->size == 0)
+                               goto give_up;
                        unuse_pack(&w_curs);
                        return;
                }
@@ -1102,6 +1129,7 @@ static void check_object(struct object_entry *entry)
                 * with sha1_object_info() to find about the object type
                 * at this point...
                 */
+               give_up:
                unuse_pack(&w_curs);
        }
 
@@ -1265,7 +1293,7 @@ static int try_delta(struct unpacked *trg, struct unpacked *src,
                max_size = trg_entry->delta_size;
                ref_depth = trg->depth;
        }
-       max_size = max_size * (max_depth - src->depth) /
+       max_size = (uint64_t)max_size * (max_depth - src->depth) /
                                                (max_depth - ref_depth + 1);
        if (max_size == 0)
                return 0;
@@ -1384,12 +1412,10 @@ static void find_deltas(struct object_entry **list, unsigned *list_size,
                        int window, int depth, unsigned *processed)
 {
        uint32_t i, idx = 0, count = 0;
-       unsigned int array_size = window * sizeof(struct unpacked);
        struct unpacked *array;
        unsigned long mem_usage = 0;
 
-       array = xmalloc(array_size);
-       memset(array, 0, array_size);
+       array = xcalloc(window, sizeof(struct unpacked));
 
        for (;;) {
                struct object_entry *entry;
@@ -1715,6 +1741,16 @@ static void prepare_pack(int window, int depth)
 
        get_object_details();
 
+       /*
+        * If we're locally repacking then we need to be doubly careful
+        * from now on in order to make sure no stealth corruption gets
+        * propagated to the new pack.  Clients receiving streamed packs
+        * should validate everything they get anyway so no need to incur
+        * the additional cost here in that case.
+        */
+       if (!pack_to_stdout)
+               do_check_packed_object_crc = 1;
+
        if (!nr_objects || !window || !depth)
                return;
 
@@ -1741,6 +1777,14 @@ static void prepare_pack(int window, int depth)
                        if (entry->type < 0)
                                die("unable to get type of object %s",
                                    sha1_to_hex(entry->idx.sha1));
+               } else {
+                       if (entry->type < 0) {
+                               /*
+                                * This object is not found, but we
+                                * don't have to include it anyway.
+                                */
+                               continue;
+                       }
                }
 
                delta_list[n++] = entry;
@@ -1861,6 +1905,8 @@ static void show_object(struct object_array_entry *p)
        add_preferred_base_object(p->name);
        add_object_entry(p->item->sha1, p->item->type, p->name, 0);
        p->item->flags |= OBJECT_ADDED;
+       free((char *)p->name);
+       p->name = NULL;
 }
 
 static void show_edge(struct commit *commit)