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Commit b20cf3f8 authored by Tzung-Bi Shih's avatar Tzung-Bi Shih
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platform/chrome: cros_ec_chardev: fix kernel data leak from ioctl

It is possible to peep kernel page's data by providing larger `insize`
in struct cros_ec_command[1] when invoking EC host commands.

Fix it by using zeroed memory.

[1]: https://elixir.bootlin.com/linux/v6.2/source/include/linux/platform_data/cros_ec_proto.h#L74



Fixes: eda2e30c ("mfd / platform: cros_ec: Miscellaneous character device to talk with the EC")
Signed-off-by: default avatarTzung-Bi Shih <tzungbi@kernel.org>
Reviewed-by: default avatarGuenter Roeck <groeck@chromium.org>
Link: https://lore.kernel.org/r/20230324010658.1082361-1-tzungbi@kernel.org
parent b0d8a677
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