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authorJunio C Hamano <gitster@pobox.com>2016-07-28 10:34:42 -0700
committerJunio C Hamano <gitster@pobox.com>2016-07-28 10:34:42 -0700
commitad2d77760434e1650c186c71fa04a8fdbd77266c (patch)
treee6f51ef4203047bda1d108bed7f3ca35196d8b4c
parent2c608e0f7c1f0fb9fb3e42eb737d7b8543e11400 (diff)
parentec9d224903053e045d99c36149703501098b021c (diff)
downloadgit-ad2d77760434e1650c186c71fa04a8fdbd77266c.tar.gz
Merge branch 'nd/pack-ofs-4gb-limit'
"git pack-objects" and "git index-pack" mostly operate with off_t when talking about the offset of objects in a packfile, but there were a handful of places that used "unsigned long" to hold that value, leading to an unintended truncation. * nd/pack-ofs-4gb-limit: fsck: use streaming interface for large blobs in pack pack-objects: do not truncate result in-pack object size on 32-bit systems index-pack: correct "offset" type in unpack_entry_data() index-pack: report correct bad object offsets even if they are large index-pack: correct "len" type in unpack_data() sha1_file.c: use type off_t* for object_info->disk_sizep pack-objects: pass length to check_pack_crc() without truncation
-rw-r--r--builtin/cat-file.c4
-rw-r--r--builtin/fsck.c4
-rw-r--r--builtin/index-pack.c23
-rw-r--r--builtin/pack-objects.c17
-rw-r--r--cache.h2
-rw-r--r--pack-check.c23
-rw-r--r--pack.h1
-rw-r--r--sha1_file.c2
-rwxr-xr-xt/t1050-large.sh7
9 files changed, 54 insertions, 29 deletions
diff --git a/builtin/cat-file.c b/builtin/cat-file.c
index 618103fdee..2dfe6265f7 100644
--- a/builtin/cat-file.c
+++ b/builtin/cat-file.c
@@ -131,7 +131,7 @@ struct expand_data {
unsigned char sha1[20];
enum object_type type;
unsigned long size;
- unsigned long disk_size;
+ off_t disk_size;
const char *rest;
unsigned char delta_base_sha1[20];
@@ -191,7 +191,7 @@ static void expand_atom(struct strbuf *sb, const char *atom, int len,
if (data->mark_query)
data->info.disk_sizep = &data->disk_size;
else
- strbuf_addf(sb, "%lu", data->disk_size);
+ strbuf_addf(sb, "%"PRIuMAX, (uintmax_t)data->disk_size);
} else if (is_atom("rest", atom, len)) {
if (data->mark_query)
data->split_on_whitespace = 1;
diff --git a/builtin/fsck.c b/builtin/fsck.c
index c6d17e63fd..2de272ea36 100644
--- a/builtin/fsck.c
+++ b/builtin/fsck.c
@@ -377,6 +377,10 @@ static int fsck_sha1(const unsigned char *sha1)
static int fsck_obj_buffer(const unsigned char *sha1, enum object_type type,
unsigned long size, void *buffer, int *eaten)
{
+ /*
+ * Note, buffer may be NULL if type is OBJ_BLOB. See
+ * verify_packfile(), data_valid variable for details.
+ */
struct object *obj;
obj = parse_object_buffer(sha1, type, size, buffer, eaten);
if (!obj) {
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index e8c71fc1d2..1008d7f63c 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -338,10 +338,10 @@ static void parse_pack_header(void)
use(sizeof(struct pack_header));
}
-static NORETURN void bad_object(unsigned long offset, const char *format,
+static NORETURN void bad_object(off_t offset, const char *format,
...) __attribute__((format (printf, 2, 3)));
-static NORETURN void bad_object(unsigned long offset, const char *format, ...)
+static NORETURN void bad_object(off_t offset, const char *format, ...)
{
va_list params;
char buf[1024];
@@ -349,7 +349,8 @@ static NORETURN void bad_object(unsigned long offset, const char *format, ...)
va_start(params, format);
vsnprintf(buf, sizeof(buf), format, params);
va_end(params);
- die(_("pack has bad object at offset %lu: %s"), offset, buf);
+ die(_("pack has bad object at offset %"PRIuMAX": %s"),
+ (uintmax_t)offset, buf);
}
static inline struct thread_local *get_thread_data(void)
@@ -429,7 +430,7 @@ static int is_delta_type(enum object_type type)
return (type == OBJ_REF_DELTA || type == OBJ_OFS_DELTA);
}
-static void *unpack_entry_data(unsigned long offset, unsigned long size,
+static void *unpack_entry_data(off_t offset, unsigned long size,
enum object_type type, unsigned char *sha1)
{
static char fixed_buf[8192];
@@ -549,13 +550,13 @@ static void *unpack_data(struct object_entry *obj,
void *cb_data)
{
off_t from = obj[0].idx.offset + obj[0].hdr_size;
- unsigned long len = obj[1].idx.offset - from;
+ off_t len = obj[1].idx.offset - from;
unsigned char *data, *inbuf;
git_zstream stream;
int status;
data = xmallocz(consume ? 64*1024 : obj->size);
- inbuf = xmalloc((len < 64*1024) ? len : 64*1024);
+ inbuf = xmalloc((len < 64*1024) ? (int)len : 64*1024);
memset(&stream, 0, sizeof(stream));
git_inflate_init(&stream);
@@ -563,15 +564,15 @@ static void *unpack_data(struct object_entry *obj,
stream.avail_out = consume ? 64*1024 : obj->size;
do {
- ssize_t n = (len < 64*1024) ? len : 64*1024;
+ ssize_t n = (len < 64*1024) ? (ssize_t)len : 64*1024;
n = xpread(get_thread_data()->pack_fd, inbuf, n, from);
if (n < 0)
die_errno(_("cannot pread pack file"));
if (!n)
- die(Q_("premature end of pack file, %lu byte missing",
- "premature end of pack file, %lu bytes missing",
- len),
- len);
+ die(Q_("premature end of pack file, %"PRIuMAX" byte missing",
+ "premature end of pack file, %"PRIuMAX" bytes missing",
+ (unsigned int)len),
+ (uintmax_t)len);
from += n;
len -= n;
stream.next_in = inbuf;
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index a2f8cfdec0..92e2e5f7a8 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -342,15 +342,15 @@ static unsigned long write_no_reuse_object(struct sha1file *f, struct object_ent
}
/* Return 0 if we will bust the pack-size limit */
-static unsigned long write_reuse_object(struct sha1file *f, struct object_entry *entry,
- unsigned long limit, int usable_delta)
+static off_t write_reuse_object(struct sha1file *f, struct object_entry *entry,
+ unsigned long limit, int usable_delta)
{
struct packed_git *p = entry->in_pack;
struct pack_window *w_curs = NULL;
struct revindex_entry *revidx;
off_t offset;
enum object_type type = entry->type;
- unsigned long datalen;
+ off_t datalen;
unsigned char header[10], dheader[10];
unsigned hdrlen;
@@ -416,11 +416,12 @@ static unsigned long write_reuse_object(struct sha1file *f, struct object_entry
}
/* Return 0 if we will bust the pack-size limit */
-static unsigned long write_object(struct sha1file *f,
- struct object_entry *entry,
- off_t write_offset)
+static off_t write_object(struct sha1file *f,
+ struct object_entry *entry,
+ off_t write_offset)
{
- unsigned long limit, len;
+ unsigned long limit;
+ off_t len;
int usable_delta, to_reuse;
if (!pack_to_stdout)
@@ -492,7 +493,7 @@ static enum write_one_status write_one(struct sha1file *f,
struct object_entry *e,
off_t *offset)
{
- unsigned long size;
+ off_t size;
int recursing;
/*
diff --git a/cache.h b/cache.h
index 3855ddfbe6..b5f76a4cf4 100644
--- a/cache.h
+++ b/cache.h
@@ -1515,7 +1515,7 @@ struct object_info {
/* Request */
enum object_type *typep;
unsigned long *sizep;
- unsigned long *disk_sizep;
+ off_t *disk_sizep;
unsigned char *delta_base_sha1;
struct strbuf *typename;
diff --git a/pack-check.c b/pack-check.c
index 1da89a41ce..d123846ea2 100644
--- a/pack-check.c
+++ b/pack-check.c
@@ -105,6 +105,8 @@ static int verify_packfile(struct packed_git *p,
void *data;
enum object_type type;
unsigned long size;
+ off_t curpos;
+ int data_valid;
if (p->index_version > 1) {
off_t offset = entries[i].offset;
@@ -116,8 +118,25 @@ static int verify_packfile(struct packed_git *p,
sha1_to_hex(entries[i].sha1),
p->pack_name, (uintmax_t)offset);
}
- data = unpack_entry(p, entries[i].offset, &type, &size);
- if (!data)
+
+ curpos = entries[i].offset;
+ type = unpack_object_header(p, w_curs, &curpos, &size);
+ unuse_pack(w_curs);
+
+ if (type == OBJ_BLOB && big_file_threshold <= size) {
+ /*
+ * Let check_sha1_signature() check it with
+ * the streaming interface; no point slurping
+ * the data in-core only to discard.
+ */
+ data = NULL;
+ data_valid = 0;
+ } else {
+ data = unpack_entry(p, entries[i].offset, &type, &size);
+ data_valid = 1;
+ }
+
+ if (data_valid && !data)
err = error("cannot unpack %s from %s at offset %"PRIuMAX"",
sha1_to_hex(entries[i].sha1), p->pack_name,
(uintmax_t)entries[i].offset);
diff --git a/pack.h b/pack.h
index 3223f5a038..0e77429df5 100644
--- a/pack.h
+++ b/pack.h
@@ -74,6 +74,7 @@ struct pack_idx_entry {
struct progress;
+/* Note, the data argument could be NULL if object type is blob */
typedef int (*verify_fn)(const unsigned char*, enum object_type, unsigned long, void*, int*);
extern const char *write_idx_file(const char *index_name, struct pack_idx_entry **objects, int nr_objects, const struct pack_idx_option *, const unsigned char *sha1);
diff --git a/sha1_file.c b/sha1_file.c
index d5e11217f5..cb571ac6e8 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -2281,7 +2281,7 @@ void *unpack_entry(struct packed_git *p, off_t obj_offset,
if (do_check_packed_object_crc && p->index_version > 1) {
struct revindex_entry *revidx = find_pack_revindex(p, obj_offset);
- unsigned long len = revidx[1].offset - obj_offset;
+ off_t len = revidx[1].offset - obj_offset;
if (check_pack_crc(p, &w_curs, obj_offset, len, revidx->nr)) {
const unsigned char *sha1 =
nth_packed_object_sha1(p, revidx->nr);
diff --git a/t/t1050-large.sh b/t/t1050-large.sh
index f9f3d1391f..096dbffecc 100755
--- a/t/t1050-large.sh
+++ b/t/t1050-large.sh
@@ -177,10 +177,9 @@ test_expect_success 'zip achiving, deflate' '
git archive --format=zip HEAD >/dev/null
'
-test_expect_success 'fsck' '
- test_must_fail git fsck 2>err &&
- n=$(grep "error: attempting to allocate .* over limit" err | wc -l) &&
- test "$n" -gt 1
+test_expect_success 'fsck large blobs' '
+ git fsck 2>err &&
+ test_must_be_empty err
'
test_done