Replace one-element array with flexible-array member in struct
user_sgmapraw.

This results in no differences in binary output.

Issue found with the help of Coccinelle and audited and fixed,
manually.

Link: https://github.com/KSPP/linux/issues/79
Link: https://github.com/ClangBuiltLinux/linux/issues/1851
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 drivers/scsi/aacraid/aacraid.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/scsi/aacraid/aacraid.h b/drivers/scsi/aacraid/aacraid.h
index 2e1623344327..d1fc1ce2e36d 100644
--- a/drivers/scsi/aacraid/aacraid.h
+++ b/drivers/scsi/aacraid/aacraid.h
@@ -532,7 +532,7 @@ struct sgmapraw {
 
 struct user_sgmapraw {
 	u32		  count;
-	struct user_sgentryraw sg[1];
+	struct user_sgentryraw sg[];
 };
 
 struct creation_info
-- 
2.34.1

On Wed, Jun 28, 2023 at 11:55:47AM -0600, Gustavo A. R. Silva wrote:
> Replace one-element array with flexible-array member in struct
> user_sgmapraw.
> 
> This results in no differences in binary output.

Confirmed.

> 
> Issue found with the help of Coccinelle and audited and fixed,
> manually.
> 
> Link: https://github.com/KSPP/linux/issues/79
> Link: https://github.com/ClangBuiltLinux/linux/issues/1851
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

Reviewed-by: Kees Cook <keescook@chromium.org>

-- 
Kees Cook