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-rw-r--r--builtin/fsck.c45
-rw-r--r--builtin/index-pack.c12
-rw-r--r--builtin/unpack-objects.c7
-rw-r--r--fsck.c138
-rw-r--r--fsck.h7
-rw-r--r--sha1_file.c2
-rw-r--r--t/lib-pack.sh12
-rwxr-xr-xt/t7415-submodule-names.sh78
8 files changed, 271 insertions, 30 deletions
diff --git a/builtin/fsck.c b/builtin/fsck.c
index ef78c6c..028aba5 100644
--- a/builtin/fsck.c
+++ b/builtin/fsck.c
@@ -337,7 +337,7 @@ static void check_connectivity(void)
}
}
-static int fsck_obj(struct object *obj)
+static int fsck_obj(struct object *obj, void *buffer, unsigned long size)
{
int err;
@@ -351,7 +351,7 @@ static int fsck_obj(struct object *obj)
if (fsck_walk(obj, NULL, &fsck_obj_options))
objerror(obj, "broken links");
- err = fsck_object(obj, NULL, 0, &fsck_obj_options);
+ err = fsck_object(obj, buffer, size, &fsck_obj_options);
if (err)
goto out;
@@ -396,7 +396,7 @@ static int fsck_obj_buffer(const struct object_id *oid, enum object_type type,
}
obj->flags &= ~(REACHABLE | SEEN);
obj->flags |= HAS_OBJ;
- return fsck_obj(obj);
+ return fsck_obj(obj, buffer, size);
}
static int default_refs;
@@ -504,44 +504,42 @@ static void get_default_heads(void)
}
}
-static struct object *parse_loose_object(const struct object_id *oid,
- const char *path)
+static int fsck_loose(const struct object_id *oid, const char *path, void *data)
{
struct object *obj;
- void *contents;
enum object_type type;
unsigned long size;
+ void *contents;
int eaten;
- if (read_loose_object(path, oid->hash, &type, &size, &contents) < 0)
- return NULL;
+ if (read_loose_object(path, oid->hash, &type, &size, &contents) < 0) {
+ errors_found |= ERROR_OBJECT;
+ error("%s: object corrupt or missing: %s",
+ oid_to_hex(oid), path);
+ return 0; /* keep checking other objects */
+ }
if (!contents && type != OBJ_BLOB)
- die("BUG: read_loose_object streamed a non-blob");
+ BUG("read_loose_object streamed a non-blob");
obj = parse_object_buffer(oid, type, size, contents, &eaten);
-
- if (!eaten)
- free(contents);
- return obj;
-}
-
-static int fsck_loose(const struct object_id *oid, const char *path, void *data)
-{
- struct object *obj = parse_loose_object(oid, path);
-
if (!obj) {
errors_found |= ERROR_OBJECT;
- error("%s: object corrupt or missing: %s",
+ error("%s: object could not be parsed: %s",
oid_to_hex(oid), path);
+ if (!eaten)
+ free(contents);
return 0; /* keep checking other objects */
}
obj->flags &= ~(REACHABLE | SEEN);
obj->flags |= HAS_OBJ;
- if (fsck_obj(obj))
+ if (fsck_obj(obj, contents, size))
errors_found |= ERROR_OBJECT;
- return 0;
+
+ if (!eaten)
+ free(contents);
+ return 0; /* keep checking other objects, even if we saw an error */
}
static int fsck_cruft(const char *basename, const char *path, void *data)
@@ -750,6 +748,9 @@ int cmd_fsck(int argc, const char **argv, const char *prefix)
}
stop_progress(&progress);
}
+
+ if (fsck_finish(&fsck_obj_options))
+ errors_found |= ERROR_OBJECT;
}
for (i = 0; i < argc; i++) {
diff --git a/builtin/index-pack.c b/builtin/index-pack.c
index bda84a9..7b2f7c0 100644
--- a/builtin/index-pack.c
+++ b/builtin/index-pack.c
@@ -836,6 +836,9 @@ static void sha1_object(const void *data, struct object_entry *obj_entry,
blob->object.flags |= FLAG_CHECKED;
else
die(_("invalid blob object %s"), oid_to_hex(oid));
+ if (do_fsck_object &&
+ fsck_object(&blob->object, (void *)data, size, &fsck_options))
+ die(_("fsck error in packed object"));
} else {
struct object *obj;
int eaten;
@@ -853,7 +856,7 @@ static void sha1_object(const void *data, struct object_entry *obj_entry,
die(_("invalid %s"), type_name(type));
if (do_fsck_object &&
fsck_object(obj, buf, size, &fsck_options))
- die(_("Error in object"));
+ die(_("fsck error in packed object"));
if (strict && fsck_walk(obj, NULL, &fsck_options))
die(_("Not all child objects of %s are reachable"), oid_to_hex(&obj->oid));
@@ -1477,6 +1480,9 @@ static void final(const char *final_pack_name, const char *curr_pack_name,
} else
chmod(final_index_name, 0444);
+ if (do_fsck_object)
+ add_packed_git(final_index_name, strlen(final_index_name), 0);
+
if (!from_stdin) {
printf("%s\n", sha1_to_hex(hash));
} else {
@@ -1818,6 +1824,10 @@ int cmd_index_pack(int argc, const char **argv, const char *prefix)
pack_hash);
else
close(input_fd);
+
+ if (do_fsck_object && fsck_finish(&fsck_options))
+ die(_("fsck error in pack objects"));
+
free(objects);
strbuf_release(&index_name_buf);
if (pack_name == NULL)
diff --git a/builtin/unpack-objects.c b/builtin/unpack-objects.c
index 6620fee..c8f1406 100644
--- a/builtin/unpack-objects.c
+++ b/builtin/unpack-objects.c
@@ -210,7 +210,7 @@ static int check_object(struct object *obj, int type, void *data, struct fsck_op
if (!obj_buf)
die("Whoops! Cannot find object '%s'", oid_to_hex(&obj->oid));
if (fsck_object(obj, obj_buf->buffer, obj_buf->size, &fsck_options))
- die("Error in object");
+ die("fsck error in packed object");
fsck_options.walk = check_object;
if (fsck_walk(obj, NULL, &fsck_options))
die("Error on reachable objects of %s", oid_to_hex(&obj->oid));
@@ -572,8 +572,11 @@ int cmd_unpack_objects(int argc, const char **argv, const char *prefix)
unpack_all();
the_hash_algo->update_fn(&ctx, buffer, offset);
the_hash_algo->final_fn(oid.hash, &ctx);
- if (strict)
+ if (strict) {
write_rest();
+ if (fsck_finish(&fsck_options))
+ die(_("fsck error in pack objects"));
+ }
if (hashcmp(fill(the_hash_algo->rawsz), oid.hash))
die("final sha1 did not match");
use(the_hash_algo->rawsz);
diff --git a/fsck.c b/fsck.c
index 5c8c12d..9339f31 100644
--- a/fsck.c
+++ b/fsck.c
@@ -10,6 +10,13 @@
#include "utf8.h"
#include "sha1-array.h"
#include "decorate.h"
+#include "oidset.h"
+#include "packfile.h"
+#include "submodule-config.h"
+#include "config.h"
+
+static struct oidset gitmodules_found = OIDSET_INIT;
+static struct oidset gitmodules_done = OIDSET_INIT;
#define FSCK_FATAL -1
#define FSCK_INFO -2
@@ -44,6 +51,7 @@
FUNC(MISSING_TAG_ENTRY, ERROR) \
FUNC(MISSING_TAG_OBJECT, ERROR) \
FUNC(MISSING_TREE, ERROR) \
+ FUNC(MISSING_TREE_OBJECT, ERROR) \
FUNC(MISSING_TYPE, ERROR) \
FUNC(MISSING_TYPE_ENTRY, ERROR) \
FUNC(MULTIPLE_AUTHORS, ERROR) \
@@ -51,6 +59,11 @@
FUNC(TREE_NOT_SORTED, ERROR) \
FUNC(UNKNOWN_TYPE, ERROR) \
FUNC(ZERO_PADDED_DATE, ERROR) \
+ FUNC(GITMODULES_MISSING, ERROR) \
+ FUNC(GITMODULES_BLOB, ERROR) \
+ FUNC(GITMODULES_PARSE, ERROR) \
+ FUNC(GITMODULES_NAME, ERROR) \
+ FUNC(GITMODULES_SYMLINK, ERROR) \
/* warnings */ \
FUNC(BAD_FILEMODE, WARN) \
FUNC(EMPTY_NAME, WARN) \
@@ -561,10 +574,18 @@ static int fsck_tree(struct tree *item, struct fsck_options *options)
has_empty_name |= !*name;
has_dot |= !strcmp(name, ".");
has_dotdot |= !strcmp(name, "..");
- has_dotgit |= (!strcmp(name, ".git") ||
- is_hfs_dotgit(name) ||
- is_ntfs_dotgit(name));
+ has_dotgit |= is_hfs_dotgit(name) || is_ntfs_dotgit(name);
has_zero_pad |= *(char *)desc.buffer == '0';
+
+ if (is_hfs_dotgitmodules(name) || is_ntfs_dotgitmodules(name)) {
+ if (!S_ISLNK(mode))
+ oidset_insert(&gitmodules_found, oid);
+ else
+ retval += report(options, &item->object,
+ FSCK_MSG_GITMODULES_SYMLINK,
+ ".gitmodules is a symbolic link");
+ }
+
if (update_tree_entry_gently(&desc)) {
retval += report(options, &item->object, FSCK_MSG_BAD_TREE, "cannot be parsed as a tree");
break;
@@ -901,6 +922,66 @@ static int fsck_tag(struct tag *tag, const char *data,
return fsck_tag_buffer(tag, data, size, options);
}
+struct fsck_gitmodules_data {
+ struct object *obj;
+ struct fsck_options *options;
+ int ret;
+};
+
+static int fsck_gitmodules_fn(const char *var, const char *value, void *vdata)
+{
+ struct fsck_gitmodules_data *data = vdata;
+ const char *subsection, *key;
+ int subsection_len;
+ char *name;
+
+ if (parse_config_key(var, "submodule", &subsection, &subsection_len, &key) < 0 ||
+ !subsection)
+ return 0;
+
+ name = xmemdupz(subsection, subsection_len);
+ if (check_submodule_name(name) < 0)
+ data->ret |= report(data->options, data->obj,
+ FSCK_MSG_GITMODULES_NAME,
+ "disallowed submodule name: %s",
+ name);
+ free(name);
+
+ return 0;
+}
+
+static int fsck_blob(struct blob *blob, const char *buf,
+ unsigned long size, struct fsck_options *options)
+{
+ struct fsck_gitmodules_data data;
+
+ if (!oidset_contains(&gitmodules_found, &blob->object.oid))
+ return 0;
+ oidset_insert(&gitmodules_done, &blob->object.oid);
+
+ if (!buf) {
+ /*
+ * A missing buffer here is a sign that the caller found the
+ * blob too gigantic to load into memory. Let's just consider
+ * that an error.
+ */
+ return report(options, &blob->object,
+ FSCK_MSG_GITMODULES_PARSE,
+ ".gitmodules too large to parse");
+ }
+
+ data.obj = &blob->object;
+ data.options = options;
+ data.ret = 0;
+ if (git_config_from_mem(fsck_gitmodules_fn, CONFIG_ORIGIN_BLOB,
+ ".gitmodules", buf, size, &data))
+ data.ret |= report(options, &blob->object,
+ FSCK_MSG_GITMODULES_PARSE,
+ "could not parse gitmodules blob");
+
+ return data.ret;
+}
+
int fsck_object(struct object *obj, void *data, unsigned long size,
struct fsck_options *options)
{
@@ -908,7 +989,7 @@ int fsck_object(struct object *obj, void *data, unsigned long size,
return report(options, obj, FSCK_MSG_BAD_OBJECT_SHA1, "no valid object to fsck");
if (obj->type == OBJ_BLOB)
- return 0;
+ return fsck_blob((struct blob *)obj, data, size, options);
if (obj->type == OBJ_TREE)
return fsck_tree((struct tree *) obj, options);
if (obj->type == OBJ_COMMIT)
@@ -932,3 +1013,52 @@ int fsck_error_function(struct fsck_options *o,
error("object %s: %s", describe_object(o, obj), message);
return 1;
}
+
+int fsck_finish(struct fsck_options *options)
+{
+ int ret = 0;
+ struct oidset_iter iter;
+ const struct object_id *oid;
+
+ oidset_iter_init(&gitmodules_found, &iter);
+ while ((oid = oidset_iter_next(&iter))) {
+ struct blob *blob;
+ enum object_type type;
+ unsigned long size;
+ char *buf;
+
+ if (oidset_contains(&gitmodules_done, oid))
+ continue;
+
+ blob = lookup_blob(oid);
+ if (!blob) {
+ ret |= report(options, &blob->object,
+ FSCK_MSG_GITMODULES_BLOB,
+ "non-blob found at .gitmodules");
+ continue;
+ }
+
+ buf = read_sha1_file(oid->hash, &type, &size);
+ if (!buf) {
+ if (is_promisor_object(&blob->object.oid))
+ continue;
+ ret |= report(options, &blob->object,
+ FSCK_MSG_GITMODULES_MISSING,
+ "unable to read .gitmodules blob");
+ continue;
+ }
+
+ if (type == OBJ_BLOB)
+ ret |= fsck_blob(blob, buf, size, options);
+ else
+ ret |= report(options, &blob->object,
+ FSCK_MSG_GITMODULES_BLOB,
+ "non-blob found at .gitmodules");
+ free(buf);
+ }
+
+
+ oidset_clear(&gitmodules_found);
+ oidset_clear(&gitmodules_done);
+ return ret;
+}
diff --git a/fsck.h b/fsck.h
index 4525510..c3cf5e0 100644
--- a/fsck.h
+++ b/fsck.h
@@ -53,4 +53,11 @@ int fsck_walk(struct object *obj, void *data, struct fsck_options *options);
int fsck_object(struct object *obj, void *data, unsigned long size,
struct fsck_options *options);
+/*
+ * Some fsck checks are context-dependent, and may end up queued; run this
+ * after completing all fsck_object() calls in order to resolve any remaining
+ * checks.
+ */
+int fsck_finish(struct fsck_options *options);
+
#endif
diff --git a/sha1_file.c b/sha1_file.c
index cc0f43e..53f0a36 100644
--- a/sha1_file.c
+++ b/sha1_file.c
@@ -2209,7 +2209,7 @@ int read_loose_object(const char *path,
goto out;
}
- if (*type == OBJ_BLOB) {
+ if (*type == OBJ_BLOB && *size > big_file_threshold) {
if (check_stream_sha1(&stream, hdr, *size, path, expected_sha1) < 0)
goto out;
} else {
diff --git a/t/lib-pack.sh b/t/lib-pack.sh
index 7509846..4674899 100644
--- a/t/lib-pack.sh
+++ b/t/lib-pack.sh
@@ -79,6 +79,18 @@ pack_obj () {
;;
esac
+ # If it's not a delta, we can convince pack-objects to generate a pack
+ # with just our entry, and then strip off the header (12 bytes) and
+ # trailer (20 bytes).
+ if test -z "$2"
+ then
+ echo "$1" | git pack-objects --stdout >pack_obj.tmp &&
+ size=$(wc -c <pack_obj.tmp) &&
+ dd if=pack_obj.tmp bs=1 count=$((size - 20 - 12)) skip=12 &&
+ rm -f pack_obj.tmp
+ return
+ fi
+
echo >&2 "BUG: don't know how to print $1${2:+ (from $2)}"
return 1
}
diff --git a/t/t7415-submodule-names.sh b/t/t7415-submodule-names.sh
index 75fa071..a770d92 100755
--- a/t/t7415-submodule-names.sh
+++ b/t/t7415-submodule-names.sh
@@ -6,6 +6,7 @@ Exercise the name-checking function on a variety of names, and then give a
real-world setup that confirms we catch this in practice.
'
. ./test-lib.sh
+. "$TEST_DIRECTORY"/lib-pack.sh
test_expect_success 'check names' '
cat >expect <<-\EOF &&
@@ -73,4 +74,81 @@ test_expect_success 'clone evil superproject' '
! grep "RUNNING POST CHECKOUT" output
'
+test_expect_success 'fsck detects evil superproject' '
+ test_must_fail git fsck
+'
+
+test_expect_success 'transfer.fsckObjects detects evil superproject (unpack)' '
+ rm -rf dst.git &&
+ git init --bare dst.git &&
+ git -C dst.git config transfer.fsckObjects true &&
+ test_must_fail git push dst.git HEAD
+'
+
+test_expect_success 'transfer.fsckObjects detects evil superproject (index)' '
+ rm -rf dst.git &&
+ git init --bare dst.git &&
+ git -C dst.git config transfer.fsckObjects true &&
+ git -C dst.git config transfer.unpackLimit 1 &&
+ test_must_fail git push dst.git HEAD
+'
+
+# Normally our packs contain commits followed by trees followed by blobs. This
+# reverses the order, which requires backtracking to find the context of a
+# blob. We'll start with a fresh gitmodules-only tree to make it simpler.
+test_expect_success 'create oddly ordered pack' '
+ git checkout --orphan odd &&
+ git rm -rf --cached . &&
+ git add .gitmodules &&
+ git commit -m odd &&
+ {
+ pack_header 3 &&
+ pack_obj $(git rev-parse HEAD:.gitmodules) &&
+ pack_obj $(git rev-parse HEAD^{tree}) &&
+ pack_obj $(git rev-parse HEAD)
+ } >odd.pack &&
+ pack_trailer odd.pack
+'
+
+test_expect_success 'transfer.fsckObjects handles odd pack (unpack)' '
+ rm -rf dst.git &&
+ git init --bare dst.git &&
+ test_must_fail git -C dst.git unpack-objects --strict <odd.pack
+'
+
+test_expect_success 'transfer.fsckObjects handles odd pack (index)' '
+ rm -rf dst.git &&
+ git init --bare dst.git &&
+ test_must_fail git -C dst.git index-pack --strict --stdin <odd.pack
+'
+
+test_expect_success 'fsck detects symlinked .gitmodules file' '
+ git init symlink &&
+ (
+ cd symlink &&
+
+ # Make the tree directly to avoid index restrictions.
+ #
+ # Because symlinks store the target as a blob, choose
+ # a pathname that could be parsed as a .gitmodules file
+ # to trick naive non-symlink-aware checking.
+ tricky="[foo]bar=true" &&
+ content=$(git hash-object -w ../.gitmodules) &&
+ target=$(printf "$tricky" | git hash-object -w --stdin) &&
+ tree=$(
+ {
+ printf "100644 blob $content\t$tricky\n" &&
+ printf "120000 blob $target\t.gitmodules\n"
+ } | git mktree
+ ) &&
+ commit=$(git commit-tree $tree) &&
+
+ # Check not only that we fail, but that it is due to the
+ # symlink detector; this grep string comes from the config
+ # variable name and will not be translated.
+ test_must_fail git fsck 2>output &&
+ grep gitmodulesSymlink output
+ )
+'
+
test_done