drivers/net/wireless/mediatek/mt76/mt76.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
Prepare for the coming implementation by GCC and Clang of the __counted_by
attribute. Flexible array members annotated with __counted_by can have
their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS
(for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family
functions).
As found with Coccinelle[1], add __counted_by for struct mt76_rx_tid.
[1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci
Cc: Felix Fietkau <nbd@nbd.name>
Cc: Lorenzo Bianconi <lorenzo@kernel.org>
Cc: Ryder Lee <ryder.lee@mediatek.com>
Cc: Shayne Chen <shayne.chen@mediatek.com>
Cc: Sean Wang <sean.wang@mediatek.com>
Cc: Kalle Valo <kvalo@kernel.org>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Cc: linux-wireless@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mediatek@lists.infradead.org
Signed-off-by: Kees Cook <keescook@chromium.org>
---
drivers/net/wireless/mediatek/mt76/mt76.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
index e8757865a3d0..03ef617b1527 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76.h
@@ -376,7 +376,7 @@ struct mt76_rx_tid {
u8 started:1, stopped:1, timer_pending:1;
- struct sk_buff *reorder_buf[];
+ struct sk_buff *reorder_buf[] __counted_by(size);
};
#define MT_TX_CB_DMA_DONE BIT(0)
--
2.34.1
On Fri, Sep 15, 2023 at 01:06:12PM -0700, Kees Cook wrote: > Prepare for the coming implementation by GCC and Clang of the __counted_by > attribute. Flexible array members annotated with __counted_by can have > their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS > (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family > functions). > > As found with Coccinelle[1], add __counted_by for struct mt76_rx_tid. Friendly ping. Can this get picked up by the wifi tree, or should it go via something else? Thanks! -Kees > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Felix Fietkau <nbd@nbd.name> > Cc: Lorenzo Bianconi <lorenzo@kernel.org> > Cc: Ryder Lee <ryder.lee@mediatek.com> > Cc: Shayne Chen <shayne.chen@mediatek.com> > Cc: Sean Wang <sean.wang@mediatek.com> > Cc: Kalle Valo <kvalo@kernel.org> > Cc: Matthias Brugger <matthias.bgg@gmail.com> > Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> > Cc: linux-wireless@vger.kernel.org > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-mediatek@lists.infradead.org > Signed-off-by: Kees Cook <keescook@chromium.org> > --- > drivers/net/wireless/mediatek/mt76/mt76.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h > index e8757865a3d0..03ef617b1527 100644 > --- a/drivers/net/wireless/mediatek/mt76/mt76.h > +++ b/drivers/net/wireless/mediatek/mt76/mt76.h > @@ -376,7 +376,7 @@ struct mt76_rx_tid { > > u8 started:1, stopped:1, timer_pending:1; > > - struct sk_buff *reorder_buf[]; > + struct sk_buff *reorder_buf[] __counted_by(size); > }; > > #define MT_TX_CB_DMA_DONE BIT(0) > -- > 2.34.1 > -- Kees Cook
Kees Cook <keescook@chromium.org> writes: > On Fri, Sep 15, 2023 at 01:06:12PM -0700, Kees Cook wrote: >> Prepare for the coming implementation by GCC and Clang of the __counted_by >> attribute. Flexible array members annotated with __counted_by can have >> their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS >> (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family >> functions). >> >> As found with Coccinelle[1], add __counted_by for struct mt76_rx_tid. > > Friendly ping. Can this get picked up by the wifi tree, or should it go > via something else? It's already in mt76 pull request and should be in wireless-next next week: https://patchwork.kernel.org/project/linux-wireless/patch/a5a2baaa-0db4-403e-9ebd-a7ff089675b4@nbd.name/ -- https://patchwork.kernel.org/project/linux-wireless/list/ https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
On 9/15/23 14:06, Kees Cook wrote: > Prepare for the coming implementation by GCC and Clang of the __counted_by > attribute. Flexible array members annotated with __counted_by can have > their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS > (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family > functions). > > As found with Coccinelle[1], add __counted_by for struct mt76_rx_tid. > > [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci > > Cc: Felix Fietkau <nbd@nbd.name> > Cc: Lorenzo Bianconi <lorenzo@kernel.org> > Cc: Ryder Lee <ryder.lee@mediatek.com> > Cc: Shayne Chen <shayne.chen@mediatek.com> > Cc: Sean Wang <sean.wang@mediatek.com> > Cc: Kalle Valo <kvalo@kernel.org> > Cc: Matthias Brugger <matthias.bgg@gmail.com> > Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> > Cc: linux-wireless@vger.kernel.org > Cc: linux-arm-kernel@lists.infradead.org > Cc: linux-mediatek@lists.infradead.org > Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Thanks -- Gustavo > --- > drivers/net/wireless/mediatek/mt76/mt76.h | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h > index e8757865a3d0..03ef617b1527 100644 > --- a/drivers/net/wireless/mediatek/mt76/mt76.h > +++ b/drivers/net/wireless/mediatek/mt76/mt76.h > @@ -376,7 +376,7 @@ struct mt76_rx_tid { > > u8 started:1, stopped:1, timer_pending:1; > > - struct sk_buff *reorder_buf[]; > + struct sk_buff *reorder_buf[] __counted_by(size); > }; > > #define MT_TX_CB_DMA_DONE BIT(0)
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