bootlin.com/blog/poison-redzones-and-shadows-inside-kasan

when it triggers in a hot path

what’s the most cursed kasan interaction you’ve seen

kprobes + kasan = nightmare fuel

but it’s not fun

i think so

does kasan work with kprobes

still sounds witchcraft

oh. makes sense

because that’s the smallest addressable unit

but why 8 bytes

so it’s always aligned

it’s just 8 bytes per shadow byte

what’s the deal with shadow memory alignment

same. 3am segfaults are the worst

than a segfault at 3am

i’d rather have a slow build

but it’s worth it for the bugs

yeah. kasan is slow as hell

wait what

but kasan is slower than a turtle

because it’s faster

ugh. why would you use slub then

like slub or something

it doesn’t work with some allocators

what’s the most annoying kasan limitation

i’m never sleeping again

and the poison is the monster

the stack trace is the jump scare

when kasan triggers it’s like a horror movie

both