Paul Meyer
662e02a5f8
tpm2_index_to_handle() returns 0 with a NULL handle when the NV index is not present on the TPM. tpm2_nvpcr_extend_bytes() only checked for r < 0, so a tombstoned NvPCR (anchor file present, NV slot cleared out from under us) passed the NULL handle to tpm2_extend_nvpcr_nv_index() and aborted the process via its assert(). Handle r == 0 explicitly, as the other tpm2_index_to_handle() callers already do. The newly introduced -ENODEV is mapped together with -ENOENT to the io.systemd.PCRExtend.NoSuchNvPCR varlink error. Signed-off-by: Paul Meyer <katexochen0@gmail.com>
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