On Mon, 2011-08-22 at 17:49 -0700, Randy Dunlap wrote: > On Mon, 22 Aug 2011 20:47:00 -0400 Arnaud Lacombe wrote: > > > Hi, > > > > On Mon, Aug 22, 2011 at 3:53 PM, Randy Dunlap <rdunlap@xxxxxxxxxxxx> wrote: > > > On Mon, 22 Aug 2011 14:53:04 +1000 Stephen Rothwell wrote: > > > > > >> Hi all, > > >> > > >> [The kernel.org mirroring is a bit low today] > > > > > > (on x86_64:) > > > > > > When CONFIG_EVM=y, CONFIG_CRYPTO_HASH2=m, CONFIG_TRUSTED_KEYS=m, > > > CONFIG_ENCRYPTED_KEYS=m, the build fails with: > > > > > You did not provide the value of CONFIG_TCG_TPM, I'll assume it was > > 'm'. That said, correct me if I'm wrong, but we currently have: > > Yes, it was 'm'. > > > menuconfig TCG_TPM > > tristate "TPM Hardware Support" > > > > [...] > > > > config EVM > > boolean "EVM support" > > depends on SECURITY && KEYS && TCG_TPM > > > > which seems terribly broken to me... How can you have a built-in > > feature, which depends on another potentially-not-built-in feature ? > > Yup. Easy, different use cases. The TPM has been around and used for a while, not requiring it to be built-in. EVM, a new use case, requires it to be built-in. > > If you change EVM to 'tristate', you will see that you are not allowed > > to make it built-in if TCG_TPM is not built-in. > > Right. The TPM, crypto, trusted and encrypted keys are tristate. Like the LSMs, EVM is boolean, which when selected using 'make xconfig', converts the tristates to built-in. The tristate/boolean mismatches aren't corrected, when .config is edited directly. Mimi > > - Arnaud > > > > > (.text+0x378aa): undefined reference to `key_type_encrypted' > > > evm_crypto.c:(.text+0x37992): undefined reference to `crypto_alloc_shash' > > > evm_crypto.c:(.text+0x37a24): undefined reference to `crypto_shash_setkey' > > > evm_crypto.c:(.text+0x37ad9): undefined reference to `crypto_shash_update' > > > evm_crypto.c:(.text+0x37aeb): undefined reference to `crypto_shash_final' > > > (.text+0x37b4b): undefined reference to `crypto_shash_update' > > > (.text+0x37c61): undefined reference to `crypto_shash_update' > > > (.text+0x37cb9): undefined reference to `crypto_shash_update' > > > > > > even though EVM (Kconfig) selects ENCRYPTED_KEYS and TRUSTED_KEYS.. > > > and even after I add "select CRYPTO_HASH2". > > > > > > Is this because EVM is bool and kconfig is confused about 'select's > > > when a bool is selecting tristates? Shouldn't the tristates become > > > 'y' instead of 'm' if they are selected by a bool that is 'y'? > > > > > > > > > xconfig shows these symbol values: > > > > > > Symbol: EVM [=y] > > > Type : boolean > > > Prompt: EVM support > > > Defined at security/integrity/evm/Kconfig:1 > > > Depends on: SECURITY [=y] && KEYS [=y] && TCG_TPM [=m] > > > Location: > > > -> Security options > > > Selects: CRYPTO_HMAC [=m] && CRYPTO_MD5 [=m] && CRYPTO_SHA1 [=m] && CRYPTO_HASH2 [=m] && ENCRYPTED_KEYS [=m] && TRUSTED_KEYS [=m] > > > > > > > > > Hm, changing TCG_TPM to =y also changes TRUSTED_KEYS and ENCRYPTED_KEYS and > > > lots of CRYPTO_ symbols from =m to =y. There must be some kind of min/max > > > symbol checking that is confused? > > > > > there is definitively an underlying min/max, but I would not point > > finger too fast. > > > Thanks for your help. > > --- > ~Randy > *** Remember to use Documentation/SubmitChecklist when testing your code *** -- To unsubscribe from this list: send the line "unsubscribe linux-next" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
