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-rw-r--r--fsck.c84
1 files changed, 37 insertions, 47 deletions
diff --git a/fsck.c b/fsck.c
index 99c0497674..56156fff44 100644
--- a/fsck.c
+++ b/fsck.c
@@ -165,18 +165,12 @@ static int fsck_tree(struct tree *item, int strict, fsck_error error_func)
sha1 = tree_entry_extract(&desc, &name, &mode);
- if (is_null_sha1(sha1))
- has_null_sha1 = 1;
- if (strchr(name, '/'))
- has_full_path = 1;
- if (!*name)
- has_empty_name = 1;
- if (!strcmp(name, "."))
- has_dot = 1;
- if (!strcmp(name, ".."))
- has_dotdot = 1;
- if (!strcmp(name, ".git"))
- has_dotgit = 1;
+ has_null_sha1 |= is_null_sha1(sha1);
+ has_full_path |= !!strchr(name, '/');
+ has_empty_name |= !*name;
+ has_dot |= !strcmp(name, ".");
+ has_dotdot |= !strcmp(name, "..");
+ has_dotgit |= !strcmp(name, ".git");
has_zero_pad |= *(char *)desc.buffer == '0';
update_tree_entry(&desc);
@@ -243,8 +237,10 @@ static int fsck_tree(struct tree *item, int strict, fsck_error error_func)
return retval;
}
-static int fsck_ident(char **ident, struct object *obj, fsck_error error_func)
+static int fsck_ident(const char **ident, struct object *obj, fsck_error error_func)
{
+ char *end;
+
if (**ident == '<')
return error_func(obj, FSCK_ERROR, "invalid author/committer line - missing space before email");
*ident += strcspn(*ident, "<>\n");
@@ -264,10 +260,11 @@ static int fsck_ident(char **ident, struct object *obj, fsck_error error_func)
(*ident)++;
if (**ident == '0' && (*ident)[1] != ' ')
return error_func(obj, FSCK_ERROR, "invalid author/committer line - zero-padded date");
- *ident += strspn(*ident, "0123456789");
- if (**ident != ' ')
+ if (date_overflows(strtoul(*ident, &end, 10)))
+ return error_func(obj, FSCK_ERROR, "invalid author/committer line - date causes integer overflow");
+ if (end == *ident || *end != ' ')
return error_func(obj, FSCK_ERROR, "invalid author/committer line - bad date");
- (*ident)++;
+ *ident = end + 1;
if ((**ident != '+' && **ident != '-') ||
!isdigit((*ident)[1]) ||
!isdigit((*ident)[2]) ||
@@ -279,58 +276,43 @@ static int fsck_ident(char **ident, struct object *obj, fsck_error error_func)
return 0;
}
-static int fsck_commit(struct commit *commit, fsck_error error_func)
+static int fsck_commit_buffer(struct commit *commit, const char *buffer,
+ fsck_error error_func)
{
- char *buffer = commit->buffer;
unsigned char tree_sha1[20], sha1[20];
struct commit_graft *graft;
- int parents = 0;
+ unsigned parent_count, parent_line_count = 0;
int err;
- if (commit->date == ULONG_MAX)
- return error_func(&commit->object, FSCK_ERROR, "invalid author/committer line");
-
- if (memcmp(buffer, "tree ", 5))
+ if (!skip_prefix(buffer, "tree ", &buffer))
return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'tree' line");
- if (get_sha1_hex(buffer+5, tree_sha1) || buffer[45] != '\n')
+ if (get_sha1_hex(buffer, tree_sha1) || buffer[40] != '\n')
return error_func(&commit->object, FSCK_ERROR, "invalid 'tree' line format - bad sha1");
- buffer += 46;
- while (!memcmp(buffer, "parent ", 7)) {
- if (get_sha1_hex(buffer+7, sha1) || buffer[47] != '\n')
+ buffer += 41;
+ while (skip_prefix(buffer, "parent ", &buffer)) {
+ if (get_sha1_hex(buffer, sha1) || buffer[40] != '\n')
return error_func(&commit->object, FSCK_ERROR, "invalid 'parent' line format - bad sha1");
- buffer += 48;
- parents++;
+ buffer += 41;
+ parent_line_count++;
}
graft = lookup_commit_graft(commit->object.sha1);
+ parent_count = commit_list_count(commit->parents);
if (graft) {
- struct commit_list *p = commit->parents;
- parents = 0;
- while (p) {
- p = p->next;
- parents++;
- }
- if (graft->nr_parent == -1 && !parents)
+ if (graft->nr_parent == -1 && !parent_count)
; /* shallow commit */
- else if (graft->nr_parent != parents)
+ else if (graft->nr_parent != parent_count)
return error_func(&commit->object, FSCK_ERROR, "graft objects missing");
} else {
- struct commit_list *p = commit->parents;
- while (p && parents) {
- p = p->next;
- parents--;
- }
- if (p || parents)
+ if (parent_count != parent_line_count)
return error_func(&commit->object, FSCK_ERROR, "parent objects missing");
}
- if (memcmp(buffer, "author ", 7))
+ if (!skip_prefix(buffer, "author ", &buffer))
return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'author' line");
- buffer += 7;
err = fsck_ident(&buffer, &commit->object, error_func);
if (err)
return err;
- if (memcmp(buffer, "committer ", strlen("committer ")))
+ if (!skip_prefix(buffer, "committer ", &buffer))
return error_func(&commit->object, FSCK_ERROR, "invalid format - expected 'committer' line");
- buffer += strlen("committer ");
err = fsck_ident(&buffer, &commit->object, error_func);
if (err)
return err;
@@ -340,6 +322,14 @@ static int fsck_commit(struct commit *commit, fsck_error error_func)
return 0;
}
+static int fsck_commit(struct commit *commit, fsck_error error_func)
+{
+ const char *buffer = get_commit_buffer(commit, NULL);
+ int ret = fsck_commit_buffer(commit, buffer, error_func);
+ unuse_commit_buffer(commit, buffer);
+ return ret;
+}
+
static int fsck_tag(struct tag *tag, fsck_error error_func)
{
struct object *tagged = tag->tagged;