Re: [PATCH v7 34/39] kselftest/arm64: Add a GCS test program built with the system libc

On Thu, Dec 14, 2023 at 11:50:11PM -0300, Thiago Jung Bauermann wrote:

If I swap process_vm_readv() and process_vm_writev(), then the read succeeds but the write fails:

The writes are intended to fail, for security reasons we explicitly block this API for GCS pages. Given that process_vm_writev() is only available with similar permissions to ptrace() which does not have these restrictions this on first consideration feels like something that we should allow but it feels out of scope for this already very large series to do so so I'll fix the test.