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[1/2,next] nouveau/svm: Replace one-element array with flexible-array member in struct nouveau_svm

Message ID 087a1c335228bd245192bbb2fb347c9af1be5750.1692208802.git.gustavoars@kernel.org (mailing list archive)
State New, archived
Headers show
Series nouveau/svm: Replace one-element array with flexible-array member | expand

Commit Message

Gustavo A. R. Silva Aug. 16, 2023, 6:04 p.m. UTC
One-element and zero-length arrays are deprecated. So, replace
one-element array in struct nouveau_svm with flexible-array member.

This results in no differences in binary output.

Link: https://github.com/KSPP/linux/issues/338
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
---
 drivers/gpu/drm/nouveau/nouveau_svm.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

Comments

Kees Cook Aug. 16, 2023, 8:38 p.m. UTC | #1
On Wed, Aug 16, 2023 at 12:04:06PM -0600, Gustavo A. R. Silva wrote:
> One-element and zero-length arrays are deprecated. So, replace
> one-element array in struct nouveau_svm with flexible-array member.
> 
> This results in no differences in binary output.
> 
> Link: https://github.com/KSPP/linux/issues/338
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>

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

diff --git a/drivers/gpu/drm/nouveau/nouveau_svm.c b/drivers/gpu/drm/nouveau/nouveau_svm.c
index 186351ecf72f..00444ad82d18 100644
--- a/drivers/gpu/drm/nouveau/nouveau_svm.c
+++ b/drivers/gpu/drm/nouveau/nouveau_svm.c
@@ -67,7 +67,7 @@  struct nouveau_svm {
 			struct nouveau_svmm *svmm;
 		} **fault;
 		int fault_nr;
-	} buffer[1];
+	} buffer[];
 };
 
 #define FAULT_ACCESS_READ 0
@@ -1063,7 +1063,7 @@  nouveau_svm_init(struct nouveau_drm *drm)
 	if (drm->client.device.info.family > NV_DEVICE_INFO_V0_PASCAL)
 		return;
 
-	if (!(drm->svm = svm = kzalloc(sizeof(*drm->svm), GFP_KERNEL)))
+	if (!(drm->svm = svm = kzalloc(struct_size(drm->svm, buffer, 1), GFP_KERNEL)))
 		return;
 
 	drm->svm->drm = drm;