CVE-2026-72151 tpm: tpm2-sessions: wait for async KPP completion in tpm_buf_append_salt

In the Linux kernel, the following vulnerability has been resolved: tpm: tpm2-sessions: wait for async KPP completion in tpmbufappendsalt tpmbufappendsalt in drivers/char/tpm/tpm2-sessions.c calls cryptokppgeneratepublickey and cryptokppcomputesharedsecret without installing a completion callback...