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[99.105.211.126]) by smtp.googlemail.com with ESMTPSA id j18sm3782566pfj.13.2022.02.04.12.03.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 04 Feb 2022 12:03:58 -0800 (PST) From: Tong Zhang To: James Bottomley , Jarkko Sakkinen , Mimi Zohar , David Howells , James Morris , "Serge E. Hallyn" , Sumit Garg , linux-integrity@vger.kernel.org, keyrings@vger.kernel.org, linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Tong Zhang Subject: [PATCH] KEYS: trusted: fix crash when TPM/TEE are built as module Date: Fri, 4 Feb 2022 12:03:42 -0800 Message-Id: <20220204200342.48665-1-ztong0001@gmail.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Spam-Status: No, score=0.1 required=5.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,DKIM_VALID_EF,FREEMAIL_ENVFROM_END_DIGIT,FREEMAIL_FROM, RCVD_IN_DNSWL_NONE,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org when TCG_TPM and TEE are built as module, trusted_key_sources will be an empty array, loading it won't do what it is supposed to do and unloading it will cause kernel crash. To reproduce: $ modprobe trusted $ modprobe -r trusted [ 173.749423] Unable to handle kernel NULL pointer dereference at virtual address 00000000 [ 173.755268] Backtrace: [ 173.755378] cleanup_trusted [trusted] from sys_delete_module+0x15c/0x22c [ 173.755589] sys_delete_module from ret_fast_syscall+0x0/0x1c To fix this issue, we also need to check CONFIG_TCG_TPM_MODULE and CONFIG_TEE_MODULE. Fixes: 5d0682be3189 ("KEYS: trusted: Add generic trusted keys framework") Signed-off-by: Tong Zhang --- security/keys/trusted-keys/trusted_core.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/security/keys/trusted-keys/trusted_core.c b/security/keys/trusted-keys/trusted_core.c index d5c891d8d353..b3a3b2f2d4a4 100644 --- a/security/keys/trusted-keys/trusted_core.c +++ b/security/keys/trusted-keys/trusted_core.c @@ -27,10 +27,10 @@ module_param_named(source, trusted_key_source, charp, 0); MODULE_PARM_DESC(source, "Select trusted keys source (tpm or tee)"); static const struct trusted_key_source trusted_key_sources[] = { -#if defined(CONFIG_TCG_TPM) +#if defined(CONFIG_TCG_TPM) || defined(CONFIG_TCG_TPM_MODULE) { "tpm", &trusted_key_tpm_ops }, #endif -#if defined(CONFIG_TEE) +#if defined(CONFIG_TEE) || defined(CONFIG_TEE_MODULE) { "tee", &trusted_key_tee_ops }, #endif }; -- 2.25.1