Rijo Thomas f4384b3e54 tee: amdtee: fix use-after-free vulnerability in amdtee_close_session ... There is a potential race condition in amdtee_close_session that may cause use-after-free in amdtee_open_session. For instance, if a session has refcount == 1, and one thread tries to free this session via: kref_put(&sess->refcount, destroy_session); the reference count will get decremented, and the next step would be to call destroy_session(). However, if in another thread, amdtee_open_session() is called before destroy_session() has completed execution, alloc_session() may return 'sess' that will be freed up later in destroy_session() leading to use-after-free in amdtee_open_session. To fix this issue, treat decrement of sess->refcount and removal of 'sess' from session list in destroy_session() as a critical section, so that it is executed atomically. Fixes: 757cc3e9ff ("tee: add AMD-TEE driver") Cc: stable@vger.kernel.org Signed-off-by: Rijo Thomas <Rijo-john.Thomas@amd.com> Reviewed-by: Sumit Garg <sumit.garg@linaro.org> Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>		2023-10-03 19:13:53 +02:00
..
amdtee_if.h	tee: amdtee: Add return_origin to 'struct tee_cmd_load_ta'	2023-05-15 08:29:52 +02:00
amdtee_private.h	tee: amdtee: unload TA only when its refcount becomes 0	2021-05-05 13:00:11 +02:00
call.c	tee: amdtee: Add return_origin to 'struct tee_cmd_load_ta'	2023-05-15 08:29:52 +02:00
core.c	tee: amdtee: fix use-after-free vulnerability in amdtee_close_session	2023-10-03 19:13:53 +02:00
Kconfig	tee: amdtee: amdtee depends on CRYPTO_DEV_CCP_DD	2020-02-13 16:55:04 +08:00
Makefile
shm_pool.c	crypto: ccp - Add a header for multiple drivers to use __psp_pa	2023-03-17 11:16:43 +08:00