[PATCH][next] scsi: bfa: Replace one-element array with flexible-array member

[PATCH][next] scsi: bfa: Replace one-element array with flexible-array member

[Gustavo A. R. Silva]

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 fdmi_attr_s.

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/209
Link: https://github.com/KSPP/linux/issues/79
Link: https://gcc.gnu.org/pipermail/gcc-patches/2022-October/602902.html [1]
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 drivers/scsi/bfa/bfa_fc.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/bfa/bfa_fc.h b/drivers/scsi/bfa/bfa_fc.h
index 0314e4b9e1fb..a12d693065ce 100644
--- a/drivers/scsi/bfa/bfa_fc.h
+++ b/drivers/scsi/bfa/bfa_fc.h
@@ -1548,7 +1548,7 @@ enum fdmi_port_attribute_type {
 struct fdmi_attr_s {
 	__be16        type;
 	__be16        len;
-	u8         value[1];
+	u8         value[];
 };
 
 /*
-- 
2.34.1

Re: [PATCH][next] scsi: bfa: Replace one-element array with flexible-array member

[Kees Cook]

On Tue, Nov 15, 2022 at 02:25:16PM -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 fdmi_attr_s.
> 
> 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/209
> Link: https://github.com/KSPP/linux/issues/79
> 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>

-- 
Kees Cook

Re: [PATCH][next] scsi: bfa: Replace one-element array with flexible-array member

[Martin K. Petersen]

Gustavo,

> 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 fdmi_attr_s.

Applied to 6.2/scsi-staging, thanks!

-- 
Martin K. Petersen	Oracle Linux Engineering

Re: [PATCH][next] scsi: bfa: Replace one-element array with flexible-array member

[Martin K. Petersen]

On Tue, 15 Nov 2022 14:25:16 -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 fdmi_attr_s.
> 
> Important to mention is that doing a build before/after this patch results
> in no binary output differences.
> 
> [...]

Applied to 6.2/scsi-queue, thanks!

[1/1] scsi: bfa: Replace one-element array with flexible-array member
      https://git.kernel.org/mkp/scsi/c/c4c5fa35563a

-- 
Martin K. Petersen	Oracle Linux Engineering