Allow invalid memfd_create *name arguments #3739
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Some applications might call it with e.g. NULL to check for memfd_create support, in these cases EFAULT should be returned
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Hi! I tried running Azul Prime JVM under rr, and as it seems that it's using memfd_create with NULL to check whether the kernel supports it, it broke rr. So here's a fixie, I hope it's reasonable 😄