iio: adc: rockchip_saradc: fix information leak in triggered buffer

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commit 3872459136 upstream.

The 'data' local struct is used to push data to user space from a
triggered buffer, but it does not set values for inactive channels, as
it only uses iio_for_each_active_channel() to assign new values.

Initialize the struct to zero before using it to avoid pushing
uninitialized information to userspace.

Cc: stable@vger.kernel.org
Fixes: 4e130dc7b4 ("iio: adc: rockchip_saradc: Add support iio buffers")
Signed-off-by: Javier Carrasco <javier.carrasco.cruz@gmail.com>
Link: https://patch.msgid.link/20241125-iio_memset_scan_holes-v1-4-0cb6e98d895c@gmail.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Javier Carrasco 2024-11-25 22:16:12 +01:00 • committed by Greg Kroah-Hartman

parent 565814cbba

commit 8193941bc4

1 changed files with 2 additions and 0 deletions

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drivers/iio/adc/rockchip_saradc.c

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