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tkutil.c: fix overrun

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* ext/tk/tkutil/tkutil.c (cbsubst_initialize): fix out-of-bound
  access when no arguments given.  `p Tk::Event.new` crashed.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54509 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
This commit is contained in:
nobu 2016-04-07 02:24:16 +00:00
parent 9cd35c22ab
commit de3f0a42d8
2 changed files with 12 additions and 5 deletions
ChangeLog
ext/tk/tkutil
tkutil.c

5
ChangeLog
View file

@ -1,3 +1,8 @@
Thu Apr 7 11:24:14 2016 Nobuyoshi Nakada <nobu@ruby-lang.org>
* ext/tk/tkutil/tkutil.c (cbsubst_initialize): fix out-of-bound
access when no arguments given. `p Tk::Event.new` crashed.
Fri Apr 1 01:26:00 2016 Benoit Daloze <eregontp@gmail.com>
* ext/coverage/coverage.c: Fully reset coverage to not persist global state.

12
ext/tk/tkutil/tkutil.c
View file

@ -1284,11 +1284,13 @@ cbsubst_initialize(argc, argv, self)
inf = cbsubst_get_ptr(rb_obj_class(self));
idx = 0;
for(iv_idx = 0; iv_idx < CBSUBST_TBL_MAX; iv_idx++) {
if ( inf->ivar[iv_idx] == (ID) 0 ) continue;
rb_ivar_set(self, inf->ivar[iv_idx], argv[idx++]);
if (idx >= argc) break;
if (argc > 0) {
idx = 0;
for (iv_idx = 0; iv_idx < CBSUBST_TBL_MAX; iv_idx++) {
if (inf->ivar[iv_idx] == (ID)0) continue;
rb_ivar_set(self, inf->ivar[iv_idx], argv[idx++]);
if (idx >= argc) break;
}
}
return self;