diff options
| author | Daniel Golle <daniel@makrotopia.org> | 2023-08-21 19:12:44 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2023-08-22 20:59:49 +0300 |
| commit | 604204fcb321abe81238551936ecda5269e81076 (patch) | |
| tree | efd1f9292521cf4ece2f49c2e53c846d7e82560b /drivers/net/ethernet/mediatek | |
| parent | 99b415fe8986803ba0eaf6b8897b16edc8fe7ec2 (diff) | |
| download | linux-604204fcb321abe81238551936ecda5269e81076.tar.xz | |
net: ethernet: mtk_eth_soc: fix NULL pointer on hw reset
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>
Acked-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/5465c1609b464cc7407ae1530c40821dcdf9d3e6.1692634266.git.daniel@makrotopia.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'drivers/net/ethernet/mediatek')
| -rw-r--r-- | drivers/net/ethernet/mediatek/mtk_wed.c | 12 |
1 files changed, 10 insertions, 2 deletions
diff --git a/drivers/net/ethernet/mediatek/mtk_wed.c b/drivers/net/ethernet/mediatek/mtk_wed.c index 985cff910f30..3b651efcc25e 100644 --- a/drivers/net/ethernet/mediatek/mtk_wed.c +++ b/drivers/net/ethernet/mediatek/mtk_wed.c @@ -221,9 +221,13 @@ 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; @@ -244,8 +248,12 @@ 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; |