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kernel: backport MTK ethernet/WLAN offload fixes

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Fixes issues with offloading to WED, especially with VLAN bridges involved

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2022-09-20 11:32:51 +02:00
parent 3cee396bf8
commit 0a72695844
3 changed files with 122 additions and 0 deletions
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31
target/linux/generic/backport-5.15/711-v6.0-01-net-ethernet-mtk_eth_soc-fix-off-by-one-check-of-ARR.patch Normal file
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@ -0,0 +1,31 @@
From: Tom Rix <trix@redhat.com>
Date: Sat, 16 Jul 2022 17:46:54 -0400
Subject: [PATCH] net: ethernet: mtk_eth_soc: fix off by one check of
ARRAY_SIZE
In mtk_wed_tx_ring_setup(.., int idx, ..), idx is used as an index here
struct mtk_wed_ring *ring = &dev->tx_ring[idx];
The bounds of idx are checked here
BUG_ON(idx > ARRAY_SIZE(dev->tx_ring));
If idx is the size of the array, it will pass this check and overflow.
So change the check to >= .
Fixes: 804775dfc288 ("net: ethernet: mtk_eth_soc: add support for Wireless Ethernet Dispatch (WED)")
Signed-off-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/20220716214654.1540240-1-trix@redhat.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
--- a/drivers/net/ethernet/mediatek/mtk_wed.c
+++ b/drivers/net/ethernet/mediatek/mtk_wed.c
@@ -651,7 +651,7 @@ mtk_wed_tx_ring_setup(struct mtk_wed_dev
* WDMA RX.
*/
- BUG_ON(idx > ARRAY_SIZE(dev->tx_ring));
+ BUG_ON(idx >= ARRAY_SIZE(dev->tx_ring));
if (mtk_wed_ring_alloc(dev, ring, MTK_WED_TX_RING_SIZE))
return -ENOMEM;

27
target/linux/generic/backport-5.15/711-v6.0-02-net-ethernet-mtk_ppe-fix-possible-NULL-pointer-deref.patch Normal file
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From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Mon, 18 Jul 2022 11:51:53 +0200
Subject: [PATCH] net: ethernet: mtk_ppe: fix possible NULL pointer dereference
in mtk_flow_get_wdma_info
odev pointer can be NULL in mtk_flow_offload_replace routine according
to the flower action rules. Fix possible NULL pointer dereference in
mtk_flow_get_wdma_info.
Fixes: a333215e10cb5 ("net: ethernet: mtk_eth_soc: implement flow offloading to WED devices")
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Link: https://lore.kernel.org/r/4e1685bc4976e21e364055f6bee86261f8f9ee93.1658137753.git.lorenzo@kernel.org
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
--- a/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
+++ b/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
@@ -93,6 +93,9 @@ mtk_flow_get_wdma_info(struct net_device
};
struct net_device_path path = {};
+ if (!ctx.dev)
+ return -ENODEV;
+
memcpy(ctx.daddr, addr, sizeof(ctx.daddr));
if (!IS_ENABLED(CONFIG_NET_MEDIATEK_SOC_WED))

64
target/linux/generic/backport-5.15/711-v6.0-03-net-ethernet-mtk-ppe-fix-traffic-offload-with-bridge.patch Normal file
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From: Lorenzo Bianconi <lorenzo@kernel.org>
Date: Fri, 22 Jul 2022 09:06:19 +0200
Subject: [PATCH] net: ethernet: mtk-ppe: fix traffic offload with bridged wlan
A typical flow offload scenario for OpenWrt users is routed traffic
received by the wan interface that is redirected to a wlan device
belonging to the lan bridge. Current implementation fails to
fill wdma offload info in mtk_flow_get_wdma_info() since odev device is
the local bridge. Fix the issue running dev_fill_forward_path routine in
mtk_flow_get_wdma_info in order to identify the wlan device.
Tested-by: Paolo Valerio <pvalerio@redhat.com>
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
---
--- a/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
+++ b/drivers/net/ethernet/mediatek/mtk_ppe_offload.c
@@ -88,32 +88,28 @@ mtk_flow_offload_mangle_eth(const struct
static int
mtk_flow_get_wdma_info(struct net_device *dev, const u8 *addr, struct mtk_wdma_info *info)
{
- struct net_device_path_ctx ctx = {
- .dev = dev,
- };
- struct net_device_path path = {};
+ struct net_device_path_stack stack;
+ struct net_device_path *path;
+ int err;
- if (!ctx.dev)
+ if (!dev)
return -ENODEV;
- memcpy(ctx.daddr, addr, sizeof(ctx.daddr));
-
if (!IS_ENABLED(CONFIG_NET_MEDIATEK_SOC_WED))
return -1;
- if (!dev->netdev_ops->ndo_fill_forward_path)
- return -1;
-
- if (dev->netdev_ops->ndo_fill_forward_path(&ctx, &path))
- return -1;
+ err = dev_fill_forward_path(dev, addr, &stack);
+ if (err)
+ return err;
- if (path.type != DEV_PATH_MTK_WDMA)
+ path = &stack.path[stack.num_paths - 1];
+ if (path->type != DEV_PATH_MTK_WDMA)
return -1;
- info->wdma_idx = path.mtk_wdma.wdma_idx;
- info->queue = path.mtk_wdma.queue;
- info->bss = path.mtk_wdma.bss;
- info->wcid = path.mtk_wdma.wcid;
+ info->wdma_idx = path->mtk_wdma.wdma_idx;
+ info->queue = path->mtk_wdma.queue;
+ info->bss = path->mtk_wdma.bss;
+ info->wcid = path->mtk_wdma.wcid;
return 0;
}