Re: For snapshot builds: armv7 chroot on aarch64 has kyua test -k /usr/tests/Kyuafile sys/kern/kern_copyin hung up [in getpid?], unkillable, prevents reboot

[Mike Karels]

On 6 Jul 2023, at 18:53, John F Carr wrote:

> The hang is caused by the sysctl call in tests/sys/kern/kern_copyin.c.  The 
> function below hangs when called in a 32 bit ARM process running in a chroot 
> environment on a 64 bit ARM system.  I will write up a bug report.
>
> static int
> get_vm_layout(struct kinfo_vm_layout *kvm)
> {
>       size_t len;
>       int mib[4];
>
>       mib[0] = CTL_KERN;
>       mib[1] = KERN_PROC;
>       mib[2] = KERN_PROC_VM_LAYOUT;
>       mib[3] = getpid();
>       len = sizeof(*kvm);
>
>       return (sysctl(mib, nitems(mib), kvm, &len, NULL, 0));
> }

Thanks for isolating this.  Let me know when you have the bug number.
I just tested a fix (the compat code drops the reference on the current
address space an extra time, probably freeing it).

                Mike