Messages in this thread Patch in this message | | | From | Tong Zhang <> | Subject | [PATCH] KEYS: trusted: fix crash when TPM/TEE are built as module | Date | Fri, 4 Feb 2022 12:03:42 -0800 |
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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 <ztong0001@gmail.com> --- 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
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