Messages in this thread | | | From | Kalle Valo <> | Subject | Re: [PATCH v3] ath9k: dfs: Remove VLA usage | Date | Wed, 25 Apr 2018 10:26:23 +0300 |
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Kees Cook <keescook@chromium.org> writes:
> 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 <andreaschristofo@gmail.com> > Signed-off-by: Kees Cook <keescook@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)
I have already applied an almost identical patch:
ath9k: dfs: remove accidental use of stack VLA
https://git.kernel.org/pub/scm/linux/kernel/git/kvalo/ath.git/commit/?h=ath-next&id=9c27489a34548913baaaf3b2776e05d4a9389e3e
-- Kalle Valo
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