Better handling of integer wraparound in the kernel

Posted Jan 27, 2024 16:17 UTC (Sat) by donald.buczek (subscriber, #112892)
In reply to: Better handling of integer wraparound in the kernel by adobriyan
Parent article: Better handling of integer wraparound in the kernel

> Using size_t is obvious mistake.

In "overflow: Expand check_add_overflow() for pointer addition"? Where exactly?

> __builtin_add_overflow_p(a, b, (typeof(0 ? a : b))0)

clang does not seem to have that builtin.

Why do you use `typeof(0 ? a : b)` instead of `typeof(a + b)` ?