grep: add a test asserting that --perl-regexp dies when !PCRE

diff --git a/builtin/unpack-objects.c b/builtin/unpack-objects.c
index 875e7ed99820998aa5d0e18f73b59763201cdb6c..4532aa083154ae7e9be07014d3761821fa6c4ddc 100644 (file)
--- a/builtin/unpack-objects.c
+++ b/builtin/unpack-objects.c
@@ -19,6 +19,7 @@ static const char unpack_usage[] = "git unpack-objects [-n] [-q] [-r] [--strict]
 static unsigned char buffer[4096];
 static unsigned int offset, len;
 static off_t consumed_bytes;
+static off_t max_input_size;
 static git_SHA_CTX ctx;
 static struct fsck_options fsck_options = FSCK_OPTIONS_STRICT;
 
@@ -87,6 +88,8 @@ static void use(int bytes)
        if (signed_add_overflows(consumed_bytes, bytes))
                die("pack too large for current definition of off_t");
        consumed_bytes += bytes;
+       if (max_input_size && consumed_bytes > max_input_size)
+               die(_("pack exceeds maximum allowed size"));
 }
 
 static void *get_data(unsigned long size)
@@ -355,7 +358,7 @@ static void unpack_delta_entry(enum object_type type, unsigned long delta_size,
                        return; /* we are done */
                else {
                        /* cannot resolve yet --- queue it */
-                       hashcpy(obj_list[nr].sha1, null_sha1);
+                       hashclr(obj_list[nr].sha1);
                        add_delta_to_list(nr, base_sha1, 0, delta_data, delta_size);
                        return;
                }
@@ -406,7 +409,7 @@ static void unpack_delta_entry(enum object_type type, unsigned long delta_size,
                         * The delta base object is itself a delta that
                         * has not been resolved yet.
                         */
-                       hashcpy(obj_list[nr].sha1, null_sha1);
+                       hashclr(obj_list[nr].sha1);
                        add_delta_to_list(nr, null_sha1, base_offset, delta_data, delta_size);
                        return;
                }
@@ -550,6 +553,10 @@ int cmd_unpack_objects(int argc, const char **argv, const char *prefix)
                                len = sizeof(*hdr);
                                continue;
                        }
+                       if (skip_prefix(arg, "--max-input-size=", &arg)) {
+                               max_input_size = strtoumax(arg, NULL, 10);
+                               continue;
+                       }
                        usage(unpack_usage);
                }