use_pack: handle signed off_t overflow

diff --git a/pack-bitmap.c b/pack-bitmap.c
index 3badc2dd1d8b79a907dc7a24a81fe18380206a74..637770af813eee643c8375051e419715f56a2db5 100644 (file)
--- a/pack-bitmap.c
+++ b/pack-bitmap.c
@@ -60,7 +60,7 @@ static struct bitmap_index {
        struct ewah_bitmap *blobs;
        struct ewah_bitmap *tags;
 
-       /* Map from SHA1 -> `stored_bitmap` for all the bitmapped comits */
+       /* Map from SHA1 -> `stored_bitmap` for all the bitmapped commits */
        khash_sha1 *bitmaps;
 
        /* Number of bitmapped commits */
@@ -209,14 +209,12 @@ static inline uint8_t read_u8(const unsigned char *buffer, size_t *pos)
        return buffer[(*pos)++];
 }
 
+#define MAX_XOR_OFFSET 160
+
 static int load_bitmap_entries_v1(struct bitmap_index *index)
 {
-       static const size_t MAX_XOR_OFFSET = 160;
-
        uint32_t i;
-       struct stored_bitmap **recent_bitmaps;
-
-       recent_bitmaps = xcalloc(MAX_XOR_OFFSET, sizeof(struct stored_bitmap));
+       struct stored_bitmap *recent_bitmaps[MAX_XOR_OFFSET] = { NULL };
 
        for (i = 0; i < index->entry_count; ++i) {
                int xor_offset, flags;
@@ -252,6 +250,20 @@ static int load_bitmap_entries_v1(struct bitmap_index *index)
        return 0;
 }
 
+static char *pack_bitmap_filename(struct packed_git *p)
+{
+       char *idx_name;
+       int len;
+
+       len = strlen(p->pack_name) - strlen(".pack");
+       idx_name = xmalloc(len + strlen(".bitmap") + 1);
+
+       memcpy(idx_name, p->pack_name, len);
+       memcpy(idx_name + len, ".bitmap", strlen(".bitmap") + 1);
+
+       return idx_name;
+}
+
 static int open_pack_bitmap_1(struct packed_git *packfile)
 {
        int fd;
@@ -322,20 +334,6 @@ static int load_pack_bitmap(void)
        return -1;
 }
 
-char *pack_bitmap_filename(struct packed_git *p)
-{
-       char *idx_name;
-       int len;
-
-       len = strlen(p->pack_name) - strlen(".pack");
-       idx_name = xmalloc(len + strlen(".bitmap") + 1);
-
-       memcpy(idx_name, p->pack_name, len);
-       memcpy(idx_name + len, ".bitmap", strlen(".bitmap") + 1);
-
-       return idx_name;
-}
-
 static int open_pack_bitmap(void)
 {
        struct packed_git *p;
@@ -624,7 +622,7 @@ static void show_objects_for_type(
        while (i < objects->word_alloc && ewah_iterator_next(&filter, &it)) {
                eword_t word = objects->words[i] & filter;
 
-               for (offset = 0; offset < BITS_IN_WORD; ++offset) {
+               for (offset = 0; offset < BITS_IN_EWORD; ++offset) {
                        const unsigned char *sha1;
                        struct revindex_entry *entry;
                        uint32_t hash = 0;
@@ -646,7 +644,7 @@ static void show_objects_for_type(
                        show_reach(sha1, object_type, 0, hash, bitmap_git.pack, entry->offset);
                }
 
-               pos += BITS_IN_WORD;
+               pos += BITS_IN_EWORD;
                i++;
        }
 }
@@ -778,7 +776,7 @@ int reuse_partial_packfile_from_bitmap(struct packed_git **packfile,
                        break;
                }
 
-               reuse_objects += BITS_IN_WORD;
+               reuse_objects += BITS_IN_EWORD;
        }
 
 #ifdef GIT_BITMAP_DEBUG
@@ -1003,7 +1001,7 @@ static int rebuild_bitmap(uint32_t *reposition,
        while (ewah_iterator_next(&word, &it)) {
                uint32_t offset, bit_pos;
 
-               for (offset = 0; offset < BITS_IN_WORD; ++offset) {
+               for (offset = 0; offset < BITS_IN_EWORD; ++offset) {
                        if ((word >> offset) == 0)
                                break;
 
@@ -1016,7 +1014,7 @@ static int rebuild_bitmap(uint32_t *reposition,
                                return -1;
                }
 
-               pos += BITS_IN_WORD;
+               pos += BITS_IN_EWORD;
        }
        return 0;
 }