diff options
| author | Sumit Garg <sumit.garg@linaro.org> | 2020-03-27 10:59:48 +0530 |
|---|---|---|
| committer | Jens Wiklander <jens.wiklander@linaro.org> | 2020-04-20 16:18:14 +0200 |
| commit | 104edb94cc4b3101bab33161cd861de13e85610b (patch) | |
| tree | e6e859e3fa56f4e9a476224681dc4a021b6c9f01 /drivers/tee | |
| parent | 2a6ba3f794e892c37d67b8ebb19487ce105eabc2 (diff) | |
| download | linux-104edb94cc4b3101bab33161cd861de13e85610b.tar.gz | |
tee: add private login method for kernel clients
There are use-cases where user-space shouldn't be allowed to communicate directly with a TEE device which is dedicated to provide a specific service for a kernel client. So add a private login method for kernel clients and disallow user-space to open-session using GP implementation defined login method range: (0x80000000 - 0xBFFFFFFF). Reviewed-by: Jerome Forissier <jerome@forissier.org> Signed-off-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Diffstat (limited to 'drivers/tee')
| -rw-r--r-- | drivers/tee/tee_core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/tee/tee_core.c b/drivers/tee/tee_core.c index 6aec502c495c..fb907bf43708 100644 --- a/drivers/tee/tee_core.c +++ b/drivers/tee/tee_core.c @@ -333,6 +333,13 @@ static int tee_ioctl_open_session(struct tee_context *ctx, goto out; } + if (arg.clnt_login >= TEE_IOCTL_LOGIN_REE_KERNEL_MIN && + arg.clnt_login <= TEE_IOCTL_LOGIN_REE_KERNEL_MAX) { + pr_debug("login method not allowed for user-space client\n"); + rc = -EPERM; + goto out; + } + rc = ctx->teedev->desc->ops->open_session(ctx, &arg, params); if (rc) goto out; |