From mboxrd@z Thu Jan 1 00:00:00 1970 From: Jeff King Subject: [PATCH 01/68] show-branch: avoid segfault with --reflog of unborn branch Date: Thu, 24 Sep 2015 17:02:54 -0400 Message-ID: <20150924210253.GA30744@sigill.intra.peff.net> References: <20150924210225.GA23624@sigill.intra.peff.net> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 To: git@vger.kernel.org X-From: git-owner@vger.kernel.org Thu Sep 24 23:03:33 2015 Return-path: Envelope-to: gcvg-git-2@plane.gmane.org Received: from vger.kernel.org ([209.132.180.67]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1ZfDfg-0005RQ-5K for gcvg-git-2@plane.gmane.org; Thu, 24 Sep 2015 23:03:19 +0200 Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753907AbbIXVC5 (ORCPT ); Thu, 24 Sep 2015 17:02:57 -0400 Received: from cloud.peff.net ([50.56.180.127]:35893 "HELO cloud.peff.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753273AbbIXVC4 (ORCPT ); Thu, 24 Sep 2015 17:02:56 -0400 Received: (qmail 11647 invoked by uid 102); 24 Sep 2015 21:02:56 -0000 Received: from Unknown (HELO peff.net) (10.0.1.1) by cloud.peff.net (qpsmtpd/0.84) with SMTP; Thu, 24 Sep 2015 16:02:56 -0500 Received: (qmail 28798 invoked by uid 107); 24 Sep 2015 21:03:08 -0000 Received: from sigill.intra.peff.net (HELO sigill.intra.peff.net) (10.0.0.7) by peff.net (qpsmtpd/0.84) with SMTP; Thu, 24 Sep 2015 17:03:08 -0400 Received: by sigill.intra.peff.net (sSMTP sendmail emulation); Thu, 24 Sep 2015 17:02:54 -0400 Content-Disposition: inline In-Reply-To: <20150924210225.GA23624@sigill.intra.peff.net> Sender: git-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: git@vger.kernel.org Archived-At: When no branch is given to the "--reflog" option, we resolve HEAD to get the default branch. However, if HEAD points to an unborn branch, resolve_ref returns NULL, and we later segfault trying to access it. Signed-off-by: Jeff King --- builtin/show-branch.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/builtin/show-branch.c b/builtin/show-branch.c index 408ce70..092b59b 100644 --- a/builtin/show-branch.c +++ b/builtin/show-branch.c @@ -743,6 +743,8 @@ int cmd_show_branch(int ac, const char **av, const char *prefix) fake_av[1] = NULL; av = fake_av; ac = 1; + if (!*av) + die("no branches given, and HEAD is not valid"); } if (ac != 1) die("--reflog option needs one branch name"); -- 2.6.0.rc3.454.g204ad51