On Sat, Dec 17, 2022 at 09:54:33AM +0800, Baoquan He wrote: > @@ -3617,6 +3617,11 @@ long vread(char *buf, char *addr, unsigned long count) > if (!vm && !flags) > continue; > > + if (vm->flags & VM_UNINITIALIZED) > + continue; This comes immediately after asserting that vm _might be null_. This surely must become:- if (vm && vm->flags & VM_UNINITIALIZED) continue;