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

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woruyu 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?

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