crypto: cryptomgr - Select algorithm types only when CRYPTO_SELFTESTS

PATCH Superseded Eric Biggers 2 participants 3 messages Mar 24 – Mar 25 Crypto API

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Eric Biggers

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2026-03-24 05:03 UTC #0 lore raw

PATCH v2 1/1 crypto: cryptomgr - Select algorithm types only when CRYPTO_SELFTESTS

Enabling any template selects CRYPTO_MANAGER, which causes CRYPTO_MANAGER2 to enable itself, which selects every algorithm type option. However, pulling in all algorithm types is needed only when the self-tests are enabled. So condition the selections accordingly.

To make this possible, also add the missing selections to various symbols that were relying on transitive selections via CRYPTO_MANAGER.

Signed-off-by Eric Biggers <[email protected]>

---

This patch is targeting cryptodev/master

v2: add selections to options that were relying on transitive selection

 crypto/Kconfig | 26 ++++++++++++++++++--------
 1 file changed, 18 insertions(+), 8 deletions(-)

crypto/Kconfig +18 -8

index e2b4106ac961..209a040c74bf 100644
@@ -155,18 +155,18 @@ config CRYPTO_MANAGER
 	  This provides the support for instantiating templates such as
 	  cbc(aes), and the support for the crypto self-tests.
 
 config CRYPTO_MANAGER2
 	def_tristate CRYPTO_MANAGER || (CRYPTO_MANAGER!=n && CRYPTO_ALGAPI=y)
-	select CRYPTO_ACOMP2
-	select CRYPTO_AEAD2
-	select CRYPTO_AKCIPHER2
-	select CRYPTO_SIG2
-	select CRYPTO_HASH2
-	select CRYPTO_KPP2
-	select CRYPTO_RNG2
-	select CRYPTO_SKCIPHER2
+	select CRYPTO_ACOMP2 if CRYPTO_SELFTESTS
+	select CRYPTO_AEAD2 if CRYPTO_SELFTESTS
+	select CRYPTO_AKCIPHER2 if CRYPTO_SELFTESTS
+	select CRYPTO_SIG2 if CRYPTO_SELFTESTS
+	select CRYPTO_HASH2 if CRYPTO_SELFTESTS
+	select CRYPTO_KPP2 if CRYPTO_SELFTESTS
+	select CRYPTO_RNG2 if CRYPTO_SELFTESTS
+	select CRYPTO_SKCIPHER2 if CRYPTO_SELFTESTS
 
 config CRYPTO_USER
 	tristate "Userspace cryptographic algorithm configuration"
 	depends on NET
 	select CRYPTO_MANAGER

@@ -222,10 +222,11 @@ config CRYPTO_PCRYPT
 	  This converts an arbitrary crypto algorithm into a parallel
 	  algorithm that executes in kernel threads.
 
 config CRYPTO_CRYPTD
 	tristate "Software async crypto daemon"
+	select CRYPTO_AEAD
 	select CRYPTO_SKCIPHER
 	select CRYPTO_HASH
 	select CRYPTO_MANAGER
 	help
 	  This is a generic software asynchronous crypto daemon that

@@ -255,24 +256,33 @@ config CRYPTO_KRB5ENC
 	  sunrpc/NFS and rxrpc/AFS.
 
 config CRYPTO_BENCHMARK
 	tristate "Crypto benchmarking module"
 	depends on m || EXPERT
+	select CRYPTO_AEAD
+	select CRYPTO_HASH
 	select CRYPTO_MANAGER
+	select CRYPTO_SKCIPHER
 	help
 	  Quick & dirty crypto benchmarking module.
 
 	  This is mainly intended for use by people developing cryptographic
 	  algorithms in the kernel.  It should not be enabled in production
 	  kernels.
 
 config CRYPTO_SIMD
 	tristate
+	select CRYPTO_AEAD
 	select CRYPTO_CRYPTD
 
 config CRYPTO_ENGINE
 	tristate
+	select CRYPTO_AEAD
+	select CRYPTO_AKCIPHER
+	select CRYPTO_HASH
+	select CRYPTO_KPP
+	select CRYPTO_SKCIPHER
 
 endmenu
 
 menu "Public-key cryptography"

base-commit: f9bbd547cfb98b1c5e535aab9b0671a2ff22453a

Signature · 1 line

2.53.0

kernel test robot

build bot

2026-03-24 19:54 UTC #1 lore raw

kernel test robot noticed the following build errors:

Hi Eric,

kernel test robot noticed the following build errors:

[auto build test ERROR on f9bbd547cfb98b1c5e535aab9b0671a2ff22453a]

url:    https://github.com/intel-lab-lkp/linux/commits/Eric-Biggers/crypto-cryptomgr-Select-algorithm-types-only-when-CRYPTO_SELFTESTS/20260324-131705
base:   f9bbd547cfb98b1c5e535aab9b0671a2ff22453a
patch link:    https://lore.kernel.org/r/20260324050123.9494-1-ebiggers%40kernel.org
patch subject: [PATCH v2] crypto: cryptomgr - Select algorithm types only when CRYPTO_SELFTESTS
config: sparc-randconfig-002-20260325 (https://download.01.org/0day-ci/archive/20260325/[email protected]/config)
compiler: sparc-linux-gcc (GCC) 14.3.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260325/[email protected]/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <[email protected]>
| Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/

All errors (new ones prefixed by >>):

sparc-linux-ld: drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.o: in function `sun8i_ce_unregister_algs':

>> sun8i-ce-core.c:(.text+0x19c): undefined reference to `crypto_unregister_rng'
   sparc-linux-ld: drivers/crypto/allwinner/sun8i-ce/sun8i-ce-core.o: in function `sun8i_ce_register_algs':
>> sun8i-ce-core.c:(.text+0x654): undefined reference to `crypto_register_rng'

Signature · 2 lines

0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki

kernel test robot

build bot

2026-03-25 05:49 UTC #2 lore raw

In reply to Eric Biggers

kernel test robot noticed the following build errors:

Hi Eric,

kernel test robot noticed the following build errors:

[auto build test ERROR on f9bbd547cfb98b1c5e535aab9b0671a2ff22453a]

url:    https://github.com/intel-lab-lkp/linux/commits/Eric-Biggers/crypto-cryptomgr-Select-algorithm-types-only-when-CRYPTO_SELFTESTS/20260324-131705
base:   f9bbd547cfb98b1c5e535aab9b0671a2ff22453a
patch link:    https://lore.kernel.org/r/20260324050123.9494-1-ebiggers%40kernel.org
patch subject: [PATCH v2] crypto: cryptomgr - Select algorithm types only when CRYPTO_SELFTESTS
config: i386-randconfig-053-20260325 (https://download.01.org/0day-ci/archive/20260325/[email protected]/config)
compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260325/[email protected]/reproduce)

All errors (new ones prefixed by >>):

>> ld.lld: error: undefined symbol: crypto_register_acomps
   >>> referenced by qat_comp_algs.c:258 (drivers/crypto/intel/qat/qat_common/qat_comp_algs.c:258)
   >>>               drivers/crypto/intel/qat/qat_common/qat_comp_algs.o:(qat_comp_algs_register) in archive vmlinux.a
--
>> ld.lld: error: undefined symbol: crypto_unregister_acomps
   >>> referenced by qat_comp_algs.c:267 (drivers/crypto/intel/qat/qat_common/qat_comp_algs.c:267)
   >>>               drivers/crypto/intel/qat/qat_common/qat_comp_algs.o:(qat_comp_algs_unregister) in archive vmlinux.a

Signature · 2 lines

0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki