Yukihiro "Matz" Matsumoto 857de45036 mruby-time: normalize microseconds before converting to nanoseconds ...

when converting microseconds to nanoseconds, multiplying very large
usec values by 1000 can cause signed integer overflow. for example,
Time.at(0, 9999999999990768) would trigger ASAN runtime error.

fixed by normalizing microseconds >= 1000000 (or <= -1000000) to
seconds before the multiplication, preventing overflow while maintaining
correct time representation. this normalization converts excess
microseconds to seconds, leaving only the fractional part for
multiplication.

applied fix to both time_alloc() and mrb_time_at() functions.

Co-authored-by: Claude <noreply@anthropic.com>

2025-12-01 18:20:44 +09:00

..

time.c

mruby-time: normalize microseconds before converting to nanoseconds

2025-12-01 18:20:44 +09:00