[1/2,next] wifi: brcmfmac: Replace one-element array with flexible-array member
Commit Message
One-element arrays are deprecated, and we are replacing them with flexible
array members instead. So, replace one-element array with flexible-array
member in struct brcmf_gscan_config.
Important to mention is that doing a build before/after this patch results
in no binary output differences.
This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines
on memcpy() and help us make progress towards globally enabling
-fstrict-flex-arrays=3 [1].
Link: https://github.com/KSPP/linux/issues/79
Link: https://github.com/KSPP/linux/issues/241
Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1]
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
drivers/net/wireless/broadcom/brcm80211/brcmfmac/fwil_types.h | 2 +-
drivers/net/wireless/broadcom/brcm80211/brcmfmac/pno.c | 2 +-
2 files changed, 2 insertions(+), 2 deletions(-)
Comments
On Mon, Nov 14, 2022 at 05:01:11PM -0600, Gustavo A. R. Silva wrote:
> One-element arrays are deprecated, and we are replacing them with flexible
> array members instead. So, replace one-element array with flexible-array
> member in struct brcmf_gscan_config.
>
> Important to mention is that doing a build before/after this patch results
> in no binary output differences.
>
> This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines
> on memcpy() and help us make progress towards globally enabling
> -fstrict-flex-arrays=3 [1].
>
> Link: https://github.com/KSPP/linux/issues/79
> Link: https://github.com/KSPP/linux/issues/241
> Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1]
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
"Gustavo A. R. Silva" <gustavoars@kernel.org> wrote:
> One-element arrays are deprecated, and we are replacing them with flexible
> array members instead. So, replace one-element array with flexible-array
> member in struct brcmf_gscan_config.
>
> Important to mention is that doing a build before/after this patch results
> in no binary output differences.
>
> This helps with the ongoing efforts to tighten the FORTIFY_SOURCE routines
> on memcpy() and help us make progress towards globally enabling
> -fstrict-flex-arrays=3 [1].
>
> Link: https://github.com/KSPP/linux/issues/79
> Link: https://github.com/KSPP/linux/issues/241
> Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1]
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
> Reviewed-by: Kees Cook <keescook@chromium.org>
2 patches applied to wireless-next.git, thanks.
61b0853d0314 wifi: brcmfmac: Replace one-element array with flexible-array member
f0e0897b4c7e wifi: brcmfmac: Use struct_size() and array_size() in code ralated to struct brcmf_gscan_config
@@ -1049,7 +1049,7 @@ struct brcmf_gscan_config {
u8 count_of_channel_buckets;
u8 retry_threshold;
__le16 lost_ap_window;
- struct brcmf_gscan_bucket_config bucket[1];
+ struct brcmf_gscan_bucket_config bucket[];
};
/**
@@ -405,7 +405,7 @@ static int brcmf_pno_config_sched_scans(struct brcmf_if *ifp)
if (n_buckets < 0)
return n_buckets;
- gsz = sizeof(*gscan_cfg) + (n_buckets - 1) * sizeof(*buckets);
+ gsz = sizeof(*gscan_cfg) + n_buckets * sizeof(*buckets);
gscan_cfg = kzalloc(gsz, GFP_KERNEL);
if (!gscan_cfg) {
err = -ENOMEM;