| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Date: Sun, 20 Nov 2011 23:22:08 -0600
From: Ajit Khaparde <ajit.khaparde@...lex.com>
To: <netdev@...r.kernel.org>, <davem@...emloft.net>
Subject: [PATCH net-next 3/3] be2net: workaround to fix a BE bug
For vlan tagged pkts, BE
1) calculates checksum even when CSO is not requested
2) calculates checksum wrongly for padded pkt less than 60 bytes long.
As a workaround disable TX vlan offloading in such cases.
Signed-off-by: Ajit Khaparde <ajit.khaparde@...lex.com>
---
drivers/net/ethernet/emulex/benet/be.h | 16 +++++++++++++
drivers/net/ethernet/emulex/benet/be_main.c | 32 +++++++++++++++++++-------
2 files changed, 39 insertions(+), 9 deletions(-)
diff --git a/drivers/net/ethernet/emulex/benet/be.h b/drivers/net/ethernet/emulex/benet/be.h
index 34f162d..c4fcea69 100644
--- a/drivers/net/ethernet/emulex/benet/be.h
+++ b/drivers/net/ethernet/emulex/benet/be.h
@@ -518,6 +518,22 @@ static inline void be_vf_eth_addr_generate(struct be_adapter *adapter, u8 *mac)
memcpy(mac, adapter->netdev->dev_addr, 3);
}
+static inline u16 be_get_tx_vlan_tag(struct be_adapter *adapter,
+ struct sk_buff *skb)
+{
+ u8 vlan_prio;
+ u16 vlan_tag;
+
+ vlan_tag = vlan_tx_tag_get(skb);
+ vlan_prio = (vlan_tag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
+ /* If vlan priority provided by OS is NOT in available bmap */
+ if (!(adapter->vlan_prio_bmap & (1 << vlan_prio)))
+ vlan_tag = (vlan_tag & ~VLAN_PRIO_MASK) |
+ adapter->recommended_prio;
+
+ return vlan_tag;
+}
+
static inline bool be_multi_rxq(const struct be_adapter *adapter)
{
return adapter->num_rx_qs > 1;
diff --git a/drivers/net/ethernet/emulex/benet/be_main.c b/drivers/net/ethernet/emulex/benet/be_main.c
index 95d41ba..db27269 100644
--- a/drivers/net/ethernet/emulex/benet/be_main.c
+++ b/drivers/net/ethernet/emulex/benet/be_main.c
@@ -554,8 +554,7 @@ static inline void wrb_fill(struct be_eth_wrb *wrb, u64 addr, int len)
static void wrb_fill_hdr(struct be_adapter *adapter, struct be_eth_hdr_wrb *hdr,
struct sk_buff *skb, u32 wrb_cnt, u32 len)
{
- u8 vlan_prio = 0;
- u16 vlan_tag = 0;
+ u16 vlan_tag;
memset(hdr, 0, sizeof(*hdr));
@@ -584,14 +583,9 @@ static void wrb_fill_hdr(struct be_adapter *adapter, struct be_eth_hdr_wrb *hdr,
AMAP_SET_BITS(struct amap_eth_hdr_wrb, udpcs, hdr, 1);
}
- if (vlan_tx_tag_present(skb)) {
+ if (adapter->vlans_added && vlan_tx_tag_present(skb)) {
AMAP_SET_BITS(struct amap_eth_hdr_wrb, vlan, hdr, 1);
- vlan_tag = vlan_tx_tag_get(skb);
- vlan_prio = (vlan_tag & VLAN_PRIO_MASK) >> VLAN_PRIO_SHIFT;
- /* If vlan priority provided by OS is NOT in available bmap */
- if (!(adapter->vlan_prio_bmap & (1 << vlan_prio)))
- vlan_tag = (vlan_tag & ~VLAN_PRIO_MASK) |
- adapter->recommended_prio;
+ vlan_tag = be_get_tx_vlan_tag(adapter, skb);
AMAP_SET_BITS(struct amap_eth_hdr_wrb, vlan_tag, hdr, vlan_tag);
}
@@ -694,6 +688,25 @@ static netdev_tx_t be_xmit(struct sk_buff *skb,
u32 start = txq->head;
bool dummy_wrb, stopped = false;
+ /* For vlan tagged pkts, BE
+ * 1) calculates checksum even when CSO is not requested
+ * 2) calculates checksum wrongly for padded pkt less than
+ * 60 bytes long.
+ * As a workaround disable TX vlan offloading in such cases.
+ */
+ if (unlikely(vlan_tx_tag_present(skb) &&
+ (skb->ip_summed != CHECKSUM_PARTIAL || skb->len <= 60))) {
+ skb = skb_share_check(skb, GFP_ATOMIC);
+ if (unlikely(!skb))
+ goto tx_drop;
+
+ skb = __vlan_put_tag(skb, be_get_tx_vlan_tag(adapter, skb));
+ if (unlikely(!skb))
+ goto tx_drop;
+
+ skb->vlan_tci = 0;
+ }
+
wrb_cnt = wrb_cnt_for_skb(adapter, skb, &dummy_wrb);
copied = make_tx_wrbs(adapter, txq, skb, wrb_cnt, dummy_wrb);
@@ -719,6 +732,7 @@ static netdev_tx_t be_xmit(struct sk_buff *skb,
skb_shinfo(skb)->gso_segs, stopped);
} else {
txq->head = start;
+tx_drop:
dev_kfree_skb_any(skb);
}
return NETDEV_TX_OK;
--
1.7.5.4
--
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Powered by blists - more mailing lists