| Message ID | ZBSl2M+aGIO1fnuG@work |
|---|---|
| State | New |
| Headers | show |
| Series | [next] wifi: carl9170: Replace fake flex-array with flexible-array member | expand |
On Fri, Mar 17, 2023 at 11:39:36AM -0600, Gustavo A. R. Silva wrote: > Zero-length arrays as fake flexible arrays are deprecated and we are > moving towards adopting C99 flexible-array members instead. > > Address the following warnings found with GCC-13 and > -fstrict-flex-arrays=3 enabled: > drivers/net/wireless/ath/carl9170/tx.c:702:61: warning: array subscript i is outside array bounds of ‘const struct _carl9170_tx_status[0]’ [-Warray-bounds=] > drivers/net/wireless/ath/carl9170/tx.c:701:65: warning: array subscript i is outside array bounds of ‘const struct _carl9170_tx_status[0]’ [-Warray-bounds=] > > 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/21 > Link: https://github.com/KSPP/linux/issues/267 > Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1] > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> This one threw me for a moment, but then realized the patch context couldn't see the union that wrapped them. :) Reviewed-by: Kees Cook <keescook@chromium.org>
"Gustavo A. R. Silva" <gustavoars@kernel.org> wrote: > Zero-length arrays as fake flexible arrays are deprecated and we are > moving towards adopting C99 flexible-array members instead. > > Address the following warnings found with GCC-13 and > -fstrict-flex-arrays=3 enabled: > drivers/net/wireless/ath/carl9170/tx.c:702:61: warning: array subscript i is outside array bounds of ‘const struct _carl9170_tx_status[0]’ [-Warray-bounds=] > drivers/net/wireless/ath/carl9170/tx.c:701:65: warning: array subscript i is outside array bounds of ‘const struct _carl9170_tx_status[0]’ [-Warray-bounds=] > > 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/21 > Link: https://github.com/KSPP/linux/issues/267 > Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1] > Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org> > Acked-by: Christian Lamparter <chunkeey@gmail.com> > Reviewed-by: Kees Cook <keescook@chromium.org> > Signed-off-by: Kalle Valo <quic_kvalo@quicinc.com> Patch applied to ath-next branch of ath.git, thanks. 1be3640cbb4a wifi: carl9170: Replace fake flex-array with flexible-array member
diff --git a/drivers/net/wireless/ath/carl9170/fwcmd.h b/drivers/net/wireless/ath/carl9170/fwcmd.h index ff4b3b50250c..e5bcc364f088 100644 --- a/drivers/net/wireless/ath/carl9170/fwcmd.h +++ b/drivers/net/wireless/ath/carl9170/fwcmd.h @@ -320,9 +320,9 @@ struct carl9170_rsp { struct carl9170_u32_list rreg_res; struct carl9170_u32_list echo; #ifdef __CARL9170FW__ - struct carl9170_tx_status tx_status[0]; + DECLARE_FLEX_ARRAY(struct carl9170_tx_status, tx_status); #endif /* __CARL9170FW__ */ - struct _carl9170_tx_status _tx_status[0]; + DECLARE_FLEX_ARRAY(struct _carl9170_tx_status, _tx_status); struct carl9170_gpio gpio; struct carl9170_tsf_rsp tsf; struct carl9170_psm psm;
Zero-length arrays as fake flexible arrays are deprecated and we are moving towards adopting C99 flexible-array members instead. Address the following warnings found with GCC-13 and -fstrict-flex-arrays=3 enabled: drivers/net/wireless/ath/carl9170/tx.c:702:61: warning: array subscript i is outside array bounds of ‘const struct _carl9170_tx_status[0]’ [-Warray-bounds=] drivers/net/wireless/ath/carl9170/tx.c:701:65: warning: array subscript i is outside array bounds of ‘const struct _carl9170_tx_status[0]’ [-Warray-bounds=] 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/21 Link: https://github.com/KSPP/linux/issues/267 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/ath/carl9170/fwcmd.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)