From e30b1525fb017e86e08931a911f5451bf24176f5 Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Ren=C3=A9=20Scharfe?= Date: Sun, 11 Oct 2020 18:03:28 +0200 Subject: [PATCH] grep: handle deref_tag() returning NULL MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit deref_tag() can return NULL. Exit gracefully in that case instead of blindly dereferencing the return value. .name shouldn't ever be NULL, but grep_object() handles that case explicitly, so let's be defensive here as well and show the broken object's ID if it happens to lack a name after all. Signed-off-by: René Scharfe Signed-off-by: Junio C Hamano --- builtin/grep.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/builtin/grep.c b/builtin/grep.c index c8037388c6..e58e57504c 100644 --- a/builtin/grep.c +++ b/builtin/grep.c @@ -670,6 +670,17 @@ static int grep_objects(struct grep_opt *opt, const struct pathspec *pathspec, NULL, 0); obj_read_unlock(); + if (!real_obj) { + char hex[GIT_MAX_HEXSZ + 1]; + const char *name = list->objects[i].name; + + if (!name) { + oid_to_hex_r(hex, &list->objects[i].item->oid); + name = hex; + } + die(_("invalid object '%s' given."), name); + } + /* load the gitmodules file for this rev */ if (recurse_submodules) { submodule_free(opt->repo);