Aleksandr Mishin
41cc91e313
commitb48aa99175upstream. In ad9834_write_frequency() clk_get_rate() can return 0. In such case ad9834_calc_freqreg() call will lead to division by zero. Checking 'if (fout > (clk_freq / 2))' doesn't protect in case of 'fout' is 0. ad9834_write_frequency() is called from ad9834_write(), where fout is taken from text buffer, which can contain any value. Modify parameters checking. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes:12b9d5bf76("Staging: IIO: DDS: AD9833 / AD9834 driver") Suggested-by: Dan Carpenter <dan.carpenter@linaro.org> Signed-off-by: Aleksandr Mishin <amishin@t-argos.ru> Reviewed-by: Dan Carpenter <dan.carpenter@linaro.org> Link: https://patch.msgid.link/20240703154506.25584-1-amishin@t-argos.ru Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>