* [PATCH][next] iwlegacy: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper
@ 2022-09-26 23:03 Gustavo A. R. Silva
2022-09-27 2:31 ` Kees Cook
2022-09-28 6:45 ` Kalle Valo
0 siblings, 2 replies; 3+ messages in thread
From: Gustavo A. R. Silva @ 2022-09-26 23:03 UTC (permalink / raw)
To: Stanislaw Gruszka, Kalle Valo, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni
Cc: linux-wireless, netdev, linux-kernel, Gustavo A. R. Silva,
linux-hardening
Zero-length arrays are deprecated and we are moving towards adopting
C99 flexible-array members, instead. So, replace zero-length arrays
declarations in anonymous union with the new DECLARE_FLEX_ARRAY()
helper macro.
This helper allows for flexible-array members in unions.
Link: https://github.com/KSPP/linux/issues/193
Link: https://github.com/KSPP/linux/issues/223
Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
drivers/net/wireless/intel/iwlegacy/commands.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/net/wireless/intel/iwlegacy/commands.h b/drivers/net/wireless/intel/iwlegacy/commands.h
index 4a97310f8fee..28cf4e832152 100644
--- a/drivers/net/wireless/intel/iwlegacy/commands.h
+++ b/drivers/net/wireless/intel/iwlegacy/commands.h
@@ -1710,7 +1710,7 @@ struct il4965_tx_resp {
*/
union {
__le32 status;
- struct agg_tx_status agg_status[0]; /* for each agg frame */
+ DECLARE_FLEX_ARRAY(struct agg_tx_status, agg_status); /* for each agg frame */
} u;
} __packed;
@@ -3365,7 +3365,7 @@ struct il_rx_pkt {
struct il_compressed_ba_resp compressed_ba;
struct il_missed_beacon_notif missed_beacon;
__le32 status;
- u8 raw[0];
+ DECLARE_FLEX_ARRAY(u8, raw);
} u;
} __packed;
--
2.34.1
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH][next] iwlegacy: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper
2022-09-26 23:03 [PATCH][next] iwlegacy: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper Gustavo A. R. Silva
@ 2022-09-27 2:31 ` Kees Cook
2022-09-28 6:45 ` Kalle Valo
1 sibling, 0 replies; 3+ messages in thread
From: Kees Cook @ 2022-09-27 2:31 UTC (permalink / raw)
To: Gustavo A. R. Silva
Cc: Stanislaw Gruszka, Kalle Valo, David S. Miller, Eric Dumazet,
Jakub Kicinski, Paolo Abeni, linux-wireless, netdev,
linux-kernel, linux-hardening
On Mon, Sep 26, 2022 at 06:03:41PM -0500, Gustavo A. R. Silva wrote:
> Zero-length arrays are deprecated and we are moving towards adopting
> C99 flexible-array members, instead. So, replace zero-length arrays
> declarations in anonymous union with the new DECLARE_FLEX_ARRAY()
> helper macro.
>
> This helper allows for flexible-array members in unions.
>
> Link: https://github.com/KSPP/linux/issues/193
> Link: https://github.com/KSPP/linux/issues/223
> Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
--
Kees Cook
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH][next] iwlegacy: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper
2022-09-26 23:03 [PATCH][next] iwlegacy: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper Gustavo A. R. Silva
2022-09-27 2:31 ` Kees Cook
@ 2022-09-28 6:45 ` Kalle Valo
1 sibling, 0 replies; 3+ messages in thread
From: Kalle Valo @ 2022-09-28 6:45 UTC (permalink / raw)
To: Gustavo A. R. Silva
Cc: Stanislaw Gruszka, David S. Miller, Eric Dumazet, Jakub Kicinski,
Paolo Abeni, linux-wireless, netdev, linux-kernel,
Gustavo A. R. Silva, linux-hardening
"Gustavo A. R. Silva" <gustavoars@kernel.org> wrote:
> Zero-length arrays are deprecated and we are moving towards adopting
> C99 flexible-array members, instead. So, replace zero-length arrays
> declarations in anonymous union with the new DECLARE_FLEX_ARRAY()
> helper macro.
>
> This helper allows for flexible-array members in unions.
>
> Link: https://github.com/KSPP/linux/issues/193
> Link: https://github.com/KSPP/linux/issues/223
> Link: https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
> Reviewed-by: Kees Cook <keescook@chromium.org>
Patch applied to wireless-next.git, thanks.
56df3d408a8f iwlegacy: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper
--
https://patchwork.kernel.org/project/linux-wireless/patch/YzIvzc0jsYLigO8a@work/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2022-09-28 6:48 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2022-09-26 23:03 [PATCH][next] iwlegacy: Replace zero-length arrays with DECLARE_FLEX_ARRAY() helper Gustavo A. R. Silva
2022-09-27 2:31 ` Kees Cook
2022-09-28 6:45 ` Kalle Valo
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).