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Array size may be changed in mrb_get_args() reentry.

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fix #4116; fix #4117; fix #4118; fix #4119; fix #4120
This commit is contained in:
Yukihiro "Matz" Matsumoto
2018-09-17 23:52:14 +09:00
parent 0ff1540e8b
commit e9b1d9dc2f
2 changed files with 17 additions and 10 deletions
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mrbgems/mruby-array-ext/src/array.c
+3 -2
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@@ -175,7 +175,7 @@ static mrb_value
mrb_ary_slice_bang(mrb_state *mrb, mrb_value self)
{
struct RArray *a = mrb_ary_ptr(self);
mrb_int i, j, k, len, alen = ARY_LEN(a);
mrb_int i, j, k, len, alen;
mrb_value val;
mrb_value *ptr;
mrb_value ary;
@@ -188,7 +188,7 @@ mrb_ary_slice_bang(mrb_state *mrb, mrb_value self)
mrb_get_args(mrb, "o|i", &index, &len);
switch (mrb_type(index)) {
case MRB_TT_RANGE:
if (mrb_range_beg_len(mrb, index, &i, &len, alen, TRUE) == 1) {
if (mrb_range_beg_len(mrb, index, &i, &len, ARY_LEN(a), TRUE) == 1) {
goto delete_pos_len;
}
else {
@@ -205,6 +205,7 @@ mrb_ary_slice_bang(mrb_state *mrb, mrb_value self)
mrb_get_args(mrb, "ii", &i, &len);
delete_pos_len:
alen = ARY_LEN(a);
if (i < 0) i += alen;
if (i < 0 || alen < i) return mrb_nil_value();
if (len < 0) return mrb_nil_value();