| Message ID | 5465c1609b464cc7407ae1530c40821dcdf9d3e6.1692634266.git.daniel@makrotopia.org (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [net,v2] net: ethernet: mtk_eth_soc: fix NULL pointer on hw reset | expand |
> When a hardware reset is triggered on devices not initializing WED the > calls to mtk_wed_fe_reset and mtk_wed_fe_reset_complete dereference a > pointer on uninitialized stack memory. > Break out of both functions in case a hw_list entry is 0. > > Fixes: 08a764a7c51b ("net: ethernet: mtk_wed: add reset/reset_complete callbacks") > Signed-off-by: Daniel Golle <daniel@makrotopia.org> Acked-by: Lorenzo Bianconi <lorenzo@kernel.org> > Reviewed-by: Simon Horman <horms@kernel.org> > --- > Changes since v1: > * remove unneeded {} initialization for stack allocated memory > > drivers/net/ethernet/mediatek/mtk_wed.c | 12 ++++++++++-- > 1 file changed, 10 insertions(+), 2 deletions(-) > > diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c > index 00aeee0d5e45f..94376aa2b34c5 100644 > --- a/drivers/net/ethernet/mediatek/mtk_wed.c > +++ b/drivers/net/ethernet/mediatek/mtk_wed.c > @@ -222,9 +222,13 @@ void mtk_wed_fe_reset(void) > > for (i = 0; i < ARRAY_SIZE(hw_list); i++) { > struct mtk_wed_hw *hw = hw_list[i]; > - struct mtk_wed_device *dev = hw->wed_dev; > + struct mtk_wed_device *dev; > int err; > > + if (!hw) > + break; > + > + dev = hw->wed_dev; > if (!dev || !dev->wlan.reset) > continue; > > @@ -245,8 +249,12 @@ void mtk_wed_fe_reset_complete(void) > > for (i = 0; i < ARRAY_SIZE(hw_list); i++) { > struct mtk_wed_hw *hw = hw_list[i]; > - struct mtk_wed_device *dev = hw->wed_dev; > + struct mtk_wed_device *dev; > + > + if (!hw) > + break; > > + dev = hw->wed_dev; > if (!dev || !dev->wlan.reset_complete) > continue; > > -- > 2.41.0
On Mon, 21 Aug 2023 17:12:44 +0100 Daniel Golle wrote: > Changes since v1: > * remove unneeded {} initialization for stack allocated memory s/stack/.bss/, FWIW, thanks for updating!
Hello: This patch was applied to netdev/net.git (main) by Jakub Kicinski <kuba@kernel.org>: On Mon, 21 Aug 2023 17:12:44 +0100 you wrote: > When a hardware reset is triggered on devices not initializing WED the > calls to mtk_wed_fe_reset and mtk_wed_fe_reset_complete dereference a > pointer on uninitialized stack memory. > Break out of both functions in case a hw_list entry is 0. > > Fixes: 08a764a7c51b ("net: ethernet: mtk_wed: add reset/reset_complete callbacks") > Signed-off-by: Daniel Golle <daniel@makrotopia.org> > Reviewed-by: Simon Horman <horms@kernel.org> > > [...] Here is the summary with links: - [net,v2] net: ethernet: mtk_eth_soc: fix NULL pointer on hw reset https://git.kernel.org/netdev/net/c/604204fcb321 You are awesome, thank you!
diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c index 00aeee0d5e45f..94376aa2b34c5 100644 --- a/drivers/net/ethernet/mediatek/mtk_wed.c +++ b/drivers/net/ethernet/mediatek/mtk_wed.c @@ -222,9 +222,13 @@ void mtk_wed_fe_reset(void) for (i = 0; i < ARRAY_SIZE(hw_list); i++) { struct mtk_wed_hw *hw = hw_list[i]; - struct mtk_wed_device *dev = hw->wed_dev; + struct mtk_wed_device *dev; int err; + if (!hw) + break; + + dev = hw->wed_dev; if (!dev || !dev->wlan.reset) continue; @@ -245,8 +249,12 @@ void mtk_wed_fe_reset_complete(void) for (i = 0; i < ARRAY_SIZE(hw_list); i++) { struct mtk_wed_hw *hw = hw_list[i]; - struct mtk_wed_device *dev = hw->wed_dev; + struct mtk_wed_device *dev; + + if (!hw) + break; + dev = hw->wed_dev; if (!dev || !dev->wlan.reset_complete) continue;
When a hardware reset is triggered on devices not initializing WED the calls to mtk_wed_fe_reset and mtk_wed_fe_reset_complete dereference a pointer on uninitialized stack memory. Break out of both functions in case a hw_list entry is 0. Fixes: 08a764a7c51b ("net: ethernet: mtk_wed: add reset/reset_complete callbacks") Signed-off-by: Daniel Golle <daniel@makrotopia.org> Reviewed-by: Simon Horman <horms@kernel.org> --- Changes since v1: * remove unneeded {} initialization for stack allocated memory drivers/net/ethernet/mediatek/mtk_wed.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-)