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Integer overflow in mrb_str_concat #3360

Closed

clayton-shopify opened this issue Dec 20, 2016 · 0 comments

Contributor

clayton-shopify commented Dec 20, 2016

The following input causes a crash:

a = "a"
31.times { a << a }

The occurs because of an integer overflow here:

mruby/src/string.c

Line 757 in 4325707

len = RSTR_LEN(s1) + RSTR_LEN(s2);

This issue was reported by https://hackerone.com/ahihi

ksss mentioned this issue

Check overflow string length #3364

Merged

matz closed this as completed in #3364

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