accel/habanalabs: fix information leak in sec_attest_info()

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[ Upstream commit a9f07790a4 ]

This function may copy the pad0 field of struct hl_info_sec_attest to user
mode which has not been initialized, resulting in leakage of kernel heap
data to user mode. To prevent this, use kzalloc() to allocate and zero out
the buffer, which can also eliminate other uninitialized holes, if any.

Fixes: 0c88760f8f ("habanalabs/gaudi2: add secured attestation info uapi")
Signed-off-by: Xingyuan Mo <hdthky0@gmail.com>
Reviewed-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Oded Gabbay <ogabbay@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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Xingyuan Mo 2023-12-08 21:00:59 +08:00 • committed by Greg Kroah-Hartman

parent 646df7c634

commit db43f2eabd

1 changed files with 1 additions and 1 deletions

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drivers/accel/habanalabs/common/habanalabs_ioctl.c

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