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Check to avoid overflows

This commit is contained in:
Marcel Fabian Krüger 2019-12-17 02:58:51 +01:00 committed by Behdad Esfahbod
parent d70afb1e5a
commit b28c282585
1 changed files with 6 additions and 3 deletions
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9
src/hb-sanitize.hh
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@ -189,9 +189,12 @@ struct hb_sanitize_context_t :
void start_processing ()
{
reset_object ();
this->max_ops = hb_min (hb_max ((unsigned int) (this->end - this->start) * HB_SANITIZE_MAX_OPS_FACTOR,
(unsigned) HB_SANITIZE_MAX_OPS_MIN),
(unsigned) HB_SANITIZE_MAX_OPS_MAX);
if (unlikely (hb_unsigned_mul_overflows (this->end - this->start, HB_SANITIZE_MAX_OPS_FACTOR)))
this->max_ops = HB_SANITIZE_MAX_OPS_MAX;
else
this->max_ops = hb_min (hb_max ((unsigned int) (this->end - this->start) * HB_SANITIZE_MAX_OPS_FACTOR,
(unsigned) HB_SANITIZE_MAX_OPS_MIN),
(unsigned) HB_SANITIZE_MAX_OPS_MAX);
this->edit_count = 0;
this->debug_depth = 0;