commit 7e35937aae6d65507bab36f10bd46249de6a835c
author Jerome Forissier <jerome@forissier.org> Mon Jan 25 16:03:52 2021 +0100
committer Jérôme Forissier <jerome@forissier.org> Thu Feb 04 18:17:08 2021 +0100
tree 555166280a3843060ce20a81dc87b102c7929faf
parent 9fc2442cc66c279cb962c90c4375746fc9b28bb9

core: crypto: sm2: do not panic core if key allocation fails

During SM2 key derivation via syscall_cryp_derive_key(), if
crypto_acipher_alloc_ecc_public_key() fails for whatever reason in
get_sm2_kep_params(), peer_key and/or peer_eph_key are left in an invalid
state and it is incorrect to call crypto_acipher_free_ecc_public_key()
in this case. Doing so causes a core panic:

 E/TC:? 0 assertion 'key->ops && key->ops->free' failed at core/crypto/crypto.c:702 <crypto_acipher_free_ecc_public_key>
 E/TC:1 0 Panic at core/kernel/assert.c:28 <_assert_break>

Fix the get_sm2_kep_params() cleanup code to avoid this situation.

Signed-off-by: Jerome Forissier <jerome@forissier.org>
Acked-by: Jens Wiklander <jens.wiklander@linaro.org>
Acked-by: Etienne Carriere <etienne.carriere@linaro.org>