| Message ID | 20220216194955.GA904126@embeddedor |
|---|---|
| State | New |
| Headers | show |
| Series | [next] carl9170: Replace zero-length arrays with flexible-array members | expand |
On Wed, Feb 16, 2022 at 01:49:55PM -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>
On 16/02/2022 20:49, 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> Acked-by: Christian Lamparter <chunkeey@gmail.com> (I've also applied it to the firmware source)
"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: Christian Lamparter <chunkeey@gmail.com> > Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> Patch applied to ath-next branch of ath.git, thanks. 152094dd8c8d carl9170: Replace zero-length arrays with flexible-array members
diff --git a/drivers/net/wireless/ath/carl9170/fwdesc.h b/drivers/net/wireless/ath/carl9170/fwdesc.h index 503b21abbba5..10acb6ad30d0 100644 --- a/drivers/net/wireless/ath/carl9170/fwdesc.h +++ b/drivers/net/wireless/ath/carl9170/fwdesc.h @@ -149,7 +149,7 @@ struct carl9170fw_fix_entry { struct carl9170fw_fix_desc { struct carl9170fw_desc_head head; - struct carl9170fw_fix_entry data[0]; + struct carl9170fw_fix_entry data[]; } __packed; #define CARL9170FW_FIX_DESC_SIZE \ (sizeof(struct carl9170fw_fix_desc)) diff --git a/drivers/net/wireless/ath/carl9170/wlan.h b/drivers/net/wireless/ath/carl9170/wlan.h index bb73553fd7c2..0a4e42e806b9 100644 --- a/drivers/net/wireless/ath/carl9170/wlan.h +++ b/drivers/net/wireless/ath/carl9170/wlan.h @@ -327,7 +327,7 @@ struct _carl9170_tx_superdesc { struct _carl9170_tx_superframe { struct _carl9170_tx_superdesc s; struct _ar9170_tx_hwdesc f; - u8 frame_data[0]; + u8 frame_data[]; } __packed __aligned(4); #define CARL9170_TX_SUPERDESC_LEN 24
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/ath/carl9170/fwdesc.h | 2 +- drivers/net/wireless/ath/carl9170/wlan.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)