| Message ID | 20220216195047.GA904198@embeddedor (mailing list archive) |
|---|---|
| State | Mainlined |
| Commit | 2e2f63a19b0aee6fef261628a7fbbab675c4d347 |
| Headers | show |
| Series | [next] tw89: core.h: Replace zero-length array with flexible-array member | expand |
On Wed, Feb 16, 2022 at 01:50:47PM -0600, Gustavo A. R. Silva wrote: > There is a regular need in the kernel to provide a way to declare > having a dynamically sized set of trailing elements in a structure. > Kernel code should always use “flexible array members”[1] for these > cases. The older style of one-element or zero-length arrays should > no longer be used[2]. > > [1] https://en.wikipedia.org/wiki/Flexible_array_member > [2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays > > Link: https://github.com/KSPP/linux/issues/78 > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> Reviewed-by: Kees Cook <keescook@chromium.org>
> -----Original Message----- > From: Kees Cook <keescook@chromium.org> > Sent: Thursday, February 17, 2022 4:36 AM > To: Gustavo A. R. Silva <gustavoars@kernel.org> > Cc: Pkshih <pkshih@realtek.com>; Kalle Valo <kvalo@kernel.org>; David S. Miller <davem@davemloft.net>; > Jakub Kicinski <kuba@kernel.org>; linux-wireless@vger.kernel.org; netdev@vger.kernel.org; > linux-kernel@vger.kernel.org; linux-hardening@vger.kernel.org > Subject: Re: [PATCH][next] tw89: core.h: Replace zero-length array with flexible-array member > > On Wed, Feb 16, 2022 at 01:50:47PM -0600, Gustavo A. R. Silva wrote: > > There is a regular need in the kernel to provide a way to declare > > having a dynamically sized set of trailing elements in a structure. > > Kernel code should always use “flexible array members”[1] for these > > cases. The older style of one-element or zero-length arrays should > > no longer be used[2]. > > > > [1] https://en.wikipedia.org/wiki/Flexible_array_member > > [2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays > > > > Link: https://github.com/KSPP/linux/issues/78 > > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> > > Reviewed-by: Kees Cook <keescook@chromium.org> Acked-by: Ping-Ke Shih <pkshih@realtek.com> -- Ping-Ke
On Wed, 16 Feb 2022 13:50:47 -0600 Gustavo A. R. Silva wrote: > There is a regular need in the kernel to provide a way to declare > having a dynamically sized set of trailing elements in a structure. > Kernel code should always use “flexible array members”[1] for these > cases. The older style of one-element or zero-length arrays should > no longer be used[2]. > > [1] https://en.wikipedia.org/wiki/Flexible_array_member > [2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays > > Link: https://github.com/KSPP/linux/issues/78 > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> The subject is off.
Jakub Kicinski <kuba@kernel.org> writes: > On Wed, 16 Feb 2022 13:50:47 -0600 Gustavo A. R. Silva wrote: >> There is a regular need in the kernel to provide a way to declare >> having a dynamically sized set of trailing elements in a structure. >> Kernel code should always use “flexible array members”[1] for these >> cases. The older style of one-element or zero-length arrays should >> no longer be used[2]. >> >> [1] https://en.wikipedia.org/wiki/Flexible_array_member >> [2] >> https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays >> >> Link: https://github.com/KSPP/linux/issues/78 >> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> > > The subject is off. I can fix that during commit.
"Gustavo A. R. Silva" <gustavoars@kernel.org> wrote: > There is a regular need in the kernel to provide a way to declare > having a dynamically sized set of trailing elements in a structure. > Kernel code should always use “flexible array members”[1] for these > cases. The older style of one-element or zero-length arrays should > no longer be used[2]. > > [1] https://en.wikipedia.org/wiki/Flexible_array_member > [2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays > > Link: https://github.com/KSPP/linux/issues/78 > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> > Reviewed-by: Kees Cook <keescook@chromium.org> > Acked-by: Ping-Ke Shih <pkshih@realtek.com> Patch applied to wireless-next.git, thanks. 2e2f63a19b0a rtw89: core.h: Replace zero-length array with flexible-array member
diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h index 7c84556ec4ad..b15b529e19ed 100644 --- a/drivers/net/wireless/realtek/rtw89/core.h +++ b/drivers/net/wireless/realtek/rtw89/core.h @@ -2847,7 +2847,7 @@ struct rtw89_dev { int napi_budget_countdown; /* HCI related data, keep last */ - u8 priv[0] __aligned(sizeof(void *)); + u8 priv[] __aligned(sizeof(void *)); }; static inline int rtw89_hci_tx_write(struct rtw89_dev *rtwdev,
There is a regular need in the kernel to provide a way to declare having a dynamically sized set of trailing elements in a structure. Kernel code should always use “flexible array members”[1] for these cases. The older style of one-element or zero-length arrays should no longer be used[2]. [1] https://en.wikipedia.org/wiki/Flexible_array_member [2] https://www.kernel.org/doc/html/v5.16/process/deprecated.html#zero-length-and-one-element-arrays Link: https://github.com/KSPP/linux/issues/78 Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> --- drivers/net/wireless/realtek/rtw89/core.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)