kernel/linux.git/drivers/tee/tee_core.c, branch v5.10.257

tee: allow a driver to allocate a tee_device without a pool

2025-12-06T21:08:09+00:00

[ Upstream commit 6dbcd5a9ab6cb6644e7d728521da1c9035ec7235 ] A TEE driver doesn't always need to provide a pool if it doesn't support memory sharing ioctls and can allocate memory for TEE messages in another way. Although this is mentioned in the documentation for tee_device_alloc(), it is not handled correctly. Reviewed-by: Sumit Garg Signed-off-by: Amirreza Zarrabi Signed-off-by: Jens Wiklander Signed-off-by: Sasha Levin

tee: Prevent size calculation wraparound on 32-bit kernels

2025-06-27T10:04:19+00:00

[ Upstream commit 39bb67edcc582b3b386a9ec983da67fa8a10ec03 ] The current code around TEE_IOCTL_PARAM_SIZE() is a bit wrong on 32-bit kernels: Multiplying a user-provided 32-bit value with the size of a structure can wrap around on such platforms. Fix it by using saturating arithmetic for the size calculation. This has no security consequences because, in all users of TEE_IOCTL_PARAM_SIZE(), the subsequent kcalloc() implicitly checks for wrapping. Signed-off-by: Jann Horn Signed-off-by: Jens Wiklander Tested-by: Rouven Czerwinski Signed-off-by: Sasha Levin

tee: fix memory leak in tee_shm_register()

2022-08-25T09:38:24+00:00

Moves the access_ok() check for valid memory range from user space from the function tee_shm_register() to tee_ioctl_shm_register(). With this we error out early before anything is done that must be undone on error. Fixes: 578c349570d2 ("tee: add overflow check in register_shm_helper()") Cc: stable@vger.kernel.org # 5.10 Reported-by: Pavel Machek Signed-off-by: Jens Wiklander Signed-off-by: Greg Kroah-Hartman

tee: export teedev_open() and teedev_close_context()

2022-03-02T10:42:47+00:00

commit 1e2c3ef0496e72ba9001da5fd1b7ed56ccb30597 upstream. Exports the two functions teedev_open() and teedev_close_context() in order to make it easier to create a driver internal struct tee_context. Reviewed-by: Sumit Garg Signed-off-by: Jens Wiklander Signed-off-by: Greg Kroah-Hartman

tee: fix put order in teedev_close_context()

2022-01-27T09:53:49+00:00

[ Upstream commit f18397ab3ae23e8e43bba9986e66af6d4497f2ad ] Prior to this patch was teedev_close_context() calling tee_device_put() before teedev_ctx_put() leading to teedev_ctx_release() accessing ctx->teedev just after the reference counter was decreased on the teedev. Fix this by calling teedev_ctx_put() before tee_device_put(). Fixes: 217e0250cccb ("tee: use reference counting for tee_context") Reviewed-by: Sumit Garg Signed-off-by: Jens Wiklander Signed-off-by: Sasha Levin

Merge tag 'tee-fix-for-v5.10' of git://git.linaro.org:/people/jens.wiklander/linux-tee into arm/fixes

2020-10-26T09:55:56+00:00

Reenable kernel login method for kernel TEE client API The kernel TEE login method was accidentally disabled previously when enabling a few other login methods, so fix that here. * tag 'tee-fix-for-v5.10' of git://git.linaro.org:/people/jens.wiklander/linux-tee: tee: client UUID: Skip REE kernel login method as well Link: https://lore.kernel.org/r/20201013070918.GA3328976@jade Signed-off-by: Arnd Bergmann

tee: client UUID: Skip REE kernel login method as well

2020-10-13T06:42:11+00:00

Since the addition of session's client UUID generation via commit [1], login via REE kernel method was disallowed. So fix that via passing nill UUID in case of TEE_IOCTL_LOGIN_REE_KERNEL method as well. Fixes: e33bcbab16d1 ("tee: add support for session's client UUID generation") [1] Signed-off-by: Sumit Garg Signed-off-by: Jens Wiklander

Merge tag 'tee-dev-cleanup-for-v5.10' of git://git.linaro.org:/people/jens.wiklander/linux-tee into arm/drivers

2020-09-26T19:39:08+00:00

Simplify tee_device_register() and friends Uses cdev_device_add() instead of the cdev_add() device_add() combination. Initializes dev->groups instead of direct calls to sysfs_create_group() and friends. * tag 'tee-dev-cleanup-for-v5.10' of git://git.linaro.org:/people/jens.wiklander/linux-tee: tee: avoid explicit sysfs_create/delete_group by initialising dev->groups tee: replace cdev_add + device_add with cdev_device_add Link: https://lore.kernel.org/r/20200918144130.GB1219771@jade Signed-off-by: Olof Johansson

tee: avoid explicit sysfs_create/delete_group by initialising dev->groups

2020-09-18T08:44:45+00:00

If the dev->groups is initialised, the sysfs group is created as part of device_add call. There is no need to call sysfs_create/delete_group explicitly. Signed-off-by: Sudeep Holla Signed-off-by: Jens Wiklander

tee: replace cdev_add + device_add with cdev_device_add

2020-09-18T08:44:40+00:00

Commit 233ed09d7fda ("chardev: add helper function to register char devs with a struct device") added a helper function 'cdev_device_add'. Make use of cdev_device_add in tee_device_register to replace cdev_add and device_add. Since cdev_device_add takes care of setting the kobj->parent, drop explicit initialisation in tee_device_alloc. Signed-off-by: Sudeep Holla Signed-off-by: Jens Wiklander