In the quest to remove all stack VLA usage from the kernel[1], this redefines FFT_NUM_SAMPLES as a #define instead of const int, which still triggers gcc's VLA checking pass.
[1] https://lkml.org/lkml/2018/3/7/621 Co-developed-by: Andreas Christoforou <andreaschrist...@gmail.com> Signed-off-by: Kees Cook <keesc...@chromium.org> --- v3: replace FFT_NUM_SAMPLES as a #define (Joe) --- drivers/net/wireless/ath/ath9k/dfs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/net/wireless/ath/ath9k/dfs.c b/drivers/net/wireless/ath/ath9k/dfs.c index 6fee9a464cce..e6e56a925121 100644 --- a/drivers/net/wireless/ath/ath9k/dfs.c +++ b/drivers/net/wireless/ath/ath9k/dfs.c @@ -40,8 +40,8 @@ static const int BIN_DELTA_MIN = 1; static const int BIN_DELTA_MAX = 10; /* we need at least 3 deltas / 4 samples for a reliable chirp detection */ -#define NUM_DIFFS 3 -static const int FFT_NUM_SAMPLES = (NUM_DIFFS + 1); +#define NUM_DIFFS 3 +#define FFT_NUM_SAMPLES (NUM_DIFFS + 1) /* Threshold for difference of delta peaks */ static const int MAX_DIFF = 2; -- 2.7.4 -- Kees Cook Pixel Security
