[compiler-rt] [sanitizer] Handle nullptr name in prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME) (PR #160824)

[Mingjie Xu via llvm-commits]

Enna1 wrote:

> > @woruyu I think it qualifies for 21.x backport, what do you think ?
> 
> Sounds good — I think it qualifies for a 21.x backport. However, I don't know what the backport steps are. Are there some reference that can help me understanding how to do?

See https://llvm.org/docs/GitHub.html#backporting-fixes-to-the-release-branches

https://github.com/llvm/llvm-project/pull/160824