A flaw was found in the Linux Kernel. Adding unknown scalars with mixed signed bounds are forbidden due to the spectre v1 masking mitigation. Therefore, this needs the bypass_spec_v1 flag instead of allow_ptr_leaks.
bugzilla.redhat.com/show_bug.cgi?id=2266407
git.kernel.org/stable/c/4ccdc6c6cae38b91c871293fb0ed8c6845a61b51
git.kernel.org/stable/c/4f3ff11204eac0ee23acf64deecb3bad7b0db0c6
git.kernel.org/stable/c/9601148392520e2e134936e76788fc2a6371e7be
nvd.nist.gov/vuln/detail/CVE-2021-46908
www.cve.org/CVERecord?id=CVE-2021-46908