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linux/drivers/tee
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Jens Wiklander 9338093db9 tee: fix register_shm_helper() 
commit d5cf5b3706 upstream.

In register_shm_helper(), fix incorrect error handling for a call to
iov_iter_extract_pages(). A case is missing for when
iov_iter_extract_pages() only got some pages and return a number larger
than 0, but not the requested amount.

This fixes a possible NULL pointer dereference following a bad input from
ioctl(TEE_IOC_SHM_REGISTER) where parts of the buffer isn't mapped.

Cc: stable@vger.kernel.org
Reported-by: Masami Ichikawa <masami256@gmail.com>
Closes: https://lore.kernel.org/op-tee/CACOXgS-Bo2W72Nj1_44c7bntyNYOavnTjJAvUbEiQfq=u9W+-g@mail.gmail.com/
Tested-by: Masami Ichikawa <masami256@gmail.com>
Fixes: 7bdee41575 ("tee: Use iov_iter to better support shared buffer registration")
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
History 2025-10-15 12:00:24 +02:00
..
amdtee tee: Refactor TEE subsystem header files 2024-04-03 09:19:31 +02:00
optee tee: optee: ffa: fix a typo of "optee_ffa_api_is_compatible" 2025-09-09 18:58:03 +02:00
tstee tee: tstee: Add Trusted Services TEE driver 2024-04-03 14:03:09 +02:00
Kconfig tee: tstee: Add Trusted Services TEE driver 2024-04-03 14:03:09 +02:00
Makefile tee: tstee: Add Trusted Services TEE driver 2024-04-03 14:03:09 +02:00
tee_core.c tee: Prevent size calculation wraparound on 32-bit kernels 2025-06-27 11:11:36 +01:00
tee_private.h tee: Refactor TEE subsystem header files 2024-04-03 09:19:31 +02:00
tee_shm.c tee: fix register_shm_helper() 2025-10-15 12:00:24 +02:00
tee_shm_pool.c tee: Refactor TEE subsystem header files 2024-04-03 09:19:31 +02:00