* [PATCH AUTOSEL 5.10 3/9] sit: allow encapsulated IPv6 traffic to be delivered locally
[not found] <20220123001258.2460594-1-sashal@kernel.org>
@ 2022-01-23 0:12 ` Sasha Levin
2022-01-24 15:50 ` Jakub Kicinski
2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 5/9] net: apple: mace: Fix build since dev_addr constification Sasha Levin
` (2 subsequent siblings)
3 siblings, 1 reply; 6+ messages in thread
From: Sasha Levin @ 2022-01-23 0:12 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Ignat Korchagin, Amir Razmjou, David Ahern, Jakub Kicinski,
Sasha Levin, davem, yoshfuji, netdev
From: Ignat Korchagin <ignat@cloudflare.com>
[ Upstream commit ed6ae5ca437d9d238117d90e95f7f2cc27da1b31 ]
While experimenting with FOU encapsulation Amir noticed that encapsulated IPv6
traffic fails to be delivered, if the peer IP address is configured locally.
It can be easily verified by creating a sit interface like below:
$ sudo ip link add name fou_test type sit remote 127.0.0.1 encap fou encap-sport auto encap-dport 1111
$ sudo ip link set fou_test up
and sending some IPv4 and IPv6 traffic to it
$ ping -I fou_test -c 1 1.1.1.1
$ ping6 -I fou_test -c 1 fe80::d0b0:dfff:fe4c:fcbc
"tcpdump -i any udp dst port 1111" will confirm that only the first IPv4 ping
was encapsulated and attempted to be delivered.
This seems like a limitation: for example, in a cloud environment the "peer"
service may be arbitrarily scheduled on any server within the cluster, where all
nodes are trying to send encapsulated traffic. And the unlucky node will not be
able to. Moreover, delivering encapsulated IPv4 traffic locally is allowed.
But I may not have all the context about this restriction and this code predates
the observable git history.
Reported-by: Amir Razmjou <arazmjou@cloudflare.com>
Signed-off-by: Ignat Korchagin <ignat@cloudflare.com>
Reviewed-by: David Ahern <dsahern@kernel.org>
Link: https://lore.kernel.org/r/20220107123842.211335-1-ignat@cloudflare.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
net/ipv6/sit.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/ipv6/sit.c b/net/ipv6/sit.c
index bab0e99f6e356..db098d3f9d6fc 100644
--- a/net/ipv6/sit.c
+++ b/net/ipv6/sit.c
@@ -949,7 +949,7 @@ static netdev_tx_t ipip6_tunnel_xmit(struct sk_buff *skb,
dst_cache_set_ip4(&tunnel->dst_cache, &rt->dst, fl4.saddr);
}
- if (rt->rt_type != RTN_UNICAST) {
+ if (rt->rt_type != RTN_UNICAST && rt->rt_type != RTN_LOCAL) {
ip_rt_put(rt);
dev->stats.tx_carrier_errors++;
goto tx_error_icmp;
--
2.34.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH AUTOSEL 5.10 5/9] net: apple: mace: Fix build since dev_addr constification
[not found] <20220123001258.2460594-1-sashal@kernel.org>
2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 3/9] sit: allow encapsulated IPv6 traffic to be delivered locally Sasha Levin
@ 2022-01-23 0:12 ` Sasha Levin
2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 6/9] net: apple: bmac: " Sasha Levin
2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 8/9] vhost/test: fix memory leak of vhost virtqueues Sasha Levin
3 siblings, 0 replies; 6+ messages in thread
From: Sasha Levin @ 2022-01-23 0:12 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Michael Ellerman, Jakub Kicinski, David S . Miller, Sasha Levin,
tanghui20, netdev
From: Michael Ellerman <mpe@ellerman.id.au>
[ Upstream commit 6c8dc12cd925e5fa8c152633338b2b35c4c89258 ]
Since commit adeef3e32146 ("net: constify netdev->dev_addr") the mace
driver no longer builds with various errors (pmac32_defconfig):
linux/drivers/net/ethernet/apple/mace.c: In function ‘mace_probe’:
linux/drivers/net/ethernet/apple/mace.c:170:20: error: assignment of read-only location ‘*(dev->dev_addr + (sizetype)j)’
170 | dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j];
| ^
linux/drivers/net/ethernet/apple/mace.c: In function ‘mace_reset’:
linux/drivers/net/ethernet/apple/mace.c:349:32: warning: passing argument 2 of ‘__mace_set_address’ discards ‘const’ qualifier from pointer target type
349 | __mace_set_address(dev, dev->dev_addr);
| ~~~^~~~~~~~~~
linux/drivers/net/ethernet/apple/mace.c:93:62: note: expected ‘void *’ but argument is of type ‘const unsigned char *’
93 | static void __mace_set_address(struct net_device *dev, void *addr);
| ~~~~~~^~~~
linux/drivers/net/ethernet/apple/mace.c: In function ‘__mace_set_address’:
linux/drivers/net/ethernet/apple/mace.c:388:36: error: assignment of read-only location ‘*(dev->dev_addr + (sizetype)i)’
388 | out_8(&mb->padr, dev->dev_addr[i] = p[i]);
| ^
Fix it by making the modifications to a local macaddr variable and then
passing that to eth_hw_addr_set(), as well as adding some missing const
qualifiers.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/apple/mace.c | 16 +++++++++++-----
1 file changed, 11 insertions(+), 5 deletions(-)
diff --git a/drivers/net/ethernet/apple/mace.c b/drivers/net/ethernet/apple/mace.c
index 9e5006e592155..f96df8e46afdd 100644
--- a/drivers/net/ethernet/apple/mace.c
+++ b/drivers/net/ethernet/apple/mace.c
@@ -90,7 +90,7 @@ static void mace_set_timeout(struct net_device *dev);
static void mace_tx_timeout(struct timer_list *t);
static inline void dbdma_reset(volatile struct dbdma_regs __iomem *dma);
static inline void mace_clean_rings(struct mace_data *mp);
-static void __mace_set_address(struct net_device *dev, void *addr);
+static void __mace_set_address(struct net_device *dev, const void *addr);
/*
* If we can't get a skbuff when we need it, we use this area for DMA.
@@ -112,6 +112,7 @@ static int mace_probe(struct macio_dev *mdev, const struct of_device_id *match)
struct net_device *dev;
struct mace_data *mp;
const unsigned char *addr;
+ u8 macaddr[ETH_ALEN];
int j, rev, rc = -EBUSY;
if (macio_resource_count(mdev) != 3 || macio_irq_count(mdev) != 3) {
@@ -167,8 +168,9 @@ static int mace_probe(struct macio_dev *mdev, const struct of_device_id *match)
rev = addr[0] == 0 && addr[1] == 0xA0;
for (j = 0; j < 6; ++j) {
- dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j];
+ macaddr[j] = rev ? bitrev8(addr[j]): addr[j];
}
+ eth_hw_addr_set(dev, macaddr);
mp->chipid = (in_8(&mp->mace->chipid_hi) << 8) |
in_8(&mp->mace->chipid_lo);
@@ -369,11 +371,12 @@ static void mace_reset(struct net_device *dev)
out_8(&mb->plscc, PORTSEL_GPSI + ENPLSIO);
}
-static void __mace_set_address(struct net_device *dev, void *addr)
+static void __mace_set_address(struct net_device *dev, const void *addr)
{
struct mace_data *mp = netdev_priv(dev);
volatile struct mace __iomem *mb = mp->mace;
- unsigned char *p = addr;
+ const unsigned char *p = addr;
+ u8 macaddr[ETH_ALEN];
int i;
/* load up the hardware address */
@@ -385,7 +388,10 @@ static void __mace_set_address(struct net_device *dev, void *addr)
;
}
for (i = 0; i < 6; ++i)
- out_8(&mb->padr, dev->dev_addr[i] = p[i]);
+ out_8(&mb->padr, macaddr[i] = p[i]);
+
+ eth_hw_addr_set(dev, macaddr);
+
if (mp->chipid != BROKEN_ADDRCHG_REV)
out_8(&mb->iac, 0);
}
--
2.34.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH AUTOSEL 5.10 6/9] net: apple: bmac: Fix build since dev_addr constification
[not found] <20220123001258.2460594-1-sashal@kernel.org>
2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 3/9] sit: allow encapsulated IPv6 traffic to be delivered locally Sasha Levin
2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 5/9] net: apple: mace: Fix build since dev_addr constification Sasha Levin
@ 2022-01-23 0:12 ` Sasha Levin
2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 8/9] vhost/test: fix memory leak of vhost virtqueues Sasha Levin
3 siblings, 0 replies; 6+ messages in thread
From: Sasha Levin @ 2022-01-23 0:12 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Michael Ellerman, Jakub Kicinski, David S . Miller, Sasha Levin,
tanghui20, netdev
From: Michael Ellerman <mpe@ellerman.id.au>
[ Upstream commit ea938248557a52e231a31f338eac4baee36a8626 ]
Since commit adeef3e32146 ("net: constify netdev->dev_addr") the bmac
driver no longer builds with the following errors (pmac32_defconfig):
linux/drivers/net/ethernet/apple/bmac.c: In function ‘bmac_probe’:
linux/drivers/net/ethernet/apple/bmac.c:1287:20: error: assignment of read-only location ‘*(dev->dev_addr + (sizetype)j)’
1287 | dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j];
| ^
Fix it by making the modifications to a local macaddr variable and then
passing that to eth_hw_addr_set().
We don't use the existing addr variable because the bitrev8() would
mutate it, but it is already used unreversed later in the function.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Reviewed-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/ethernet/apple/bmac.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/apple/bmac.c b/drivers/net/ethernet/apple/bmac.c
index 1e4e402f07d76..19c7cd9beeef3 100644
--- a/drivers/net/ethernet/apple/bmac.c
+++ b/drivers/net/ethernet/apple/bmac.c
@@ -1240,6 +1240,7 @@ static int bmac_probe(struct macio_dev *mdev, const struct of_device_id *match)
struct bmac_data *bp;
const unsigned char *prop_addr;
unsigned char addr[6];
+ u8 macaddr[6];
struct net_device *dev;
int is_bmac_plus = ((int)match->data) != 0;
@@ -1287,7 +1288,9 @@ static int bmac_probe(struct macio_dev *mdev, const struct of_device_id *match)
rev = addr[0] == 0 && addr[1] == 0xA0;
for (j = 0; j < 6; ++j)
- dev->dev_addr[j] = rev ? bitrev8(addr[j]): addr[j];
+ macaddr[j] = rev ? bitrev8(addr[j]): addr[j];
+
+ eth_hw_addr_set(dev, macaddr);
/* Enable chip without interrupts for now */
bmac_enable_and_reset_chip(dev);
--
2.34.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* [PATCH AUTOSEL 5.10 8/9] vhost/test: fix memory leak of vhost virtqueues
[not found] <20220123001258.2460594-1-sashal@kernel.org>
` (2 preceding siblings ...)
2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 6/9] net: apple: bmac: " Sasha Levin
@ 2022-01-23 0:12 ` Sasha Levin
3 siblings, 0 replies; 6+ messages in thread
From: Sasha Levin @ 2022-01-23 0:12 UTC (permalink / raw)
To: linux-kernel, stable
Cc: Xianting Tian, Michael S . Tsirkin, Jason Wang, Sasha Levin, kvm,
virtualization, netdev
From: Xianting Tian <xianting.tian@linux.alibaba.com>
[ Upstream commit 080063920777af65105e5953e2851e036376e3ea ]
We need free the vqs in .release(), which are allocated in .open().
Signed-off-by: Xianting Tian <xianting.tian@linux.alibaba.com>
Link: https://lore.kernel.org/r/20211228030924.3468439-1-xianting.tian@linux.alibaba.com
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
Acked-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/vhost/test.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/vhost/test.c b/drivers/vhost/test.c
index a09dedc79f682..05740cba1cd89 100644
--- a/drivers/vhost/test.c
+++ b/drivers/vhost/test.c
@@ -166,6 +166,7 @@ static int vhost_test_release(struct inode *inode, struct file *f)
/* We do an extra flush before freeing memory,
* since jobs can re-queue themselves. */
vhost_test_flush(n);
+ kfree(n->dev.vqs);
kfree(n);
return 0;
}
--
2.34.1
^ permalink raw reply related [flat|nested] 6+ messages in thread
* Re: [PATCH AUTOSEL 5.10 3/9] sit: allow encapsulated IPv6 traffic to be delivered locally
2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 3/9] sit: allow encapsulated IPv6 traffic to be delivered locally Sasha Levin
@ 2022-01-24 15:50 ` Jakub Kicinski
2022-01-24 15:55 ` Ignat Korchagin
0 siblings, 1 reply; 6+ messages in thread
From: Jakub Kicinski @ 2022-01-24 15:50 UTC (permalink / raw)
To: Sasha Levin
Cc: linux-kernel, stable, Ignat Korchagin, Amir Razmjou, David Ahern,
davem, yoshfuji, netdev
On Sat, 22 Jan 2022 19:12:52 -0500 Sasha Levin wrote:
> From: Ignat Korchagin <ignat@cloudflare.com>
>
> [ Upstream commit ed6ae5ca437d9d238117d90e95f7f2cc27da1b31 ]
>
> While experimenting with FOU encapsulation Amir noticed that encapsulated IPv6
> traffic fails to be delivered, if the peer IP address is configured locally.
Unless Ignat and Amir need it I'd vote for not backporting this to LTS.
This patch is firmly in the "this configuration was never supported"
category. 5.15 and 5.16 are probably fine.
^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: [PATCH AUTOSEL 5.10 3/9] sit: allow encapsulated IPv6 traffic to be delivered locally
2022-01-24 15:50 ` Jakub Kicinski
@ 2022-01-24 15:55 ` Ignat Korchagin
0 siblings, 0 replies; 6+ messages in thread
From: Ignat Korchagin @ 2022-01-24 15:55 UTC (permalink / raw)
To: Jakub Kicinski, Sasha Levin, stable, netdev
Cc: linux-kernel, Amir Razmjou, David Ahern, David S. Miller,
Hideaki YOSHIFUJI
On Mon, Jan 24, 2022 at 3:50 PM Jakub Kicinski <kuba@kernel.org> wrote:
>
> On Sat, 22 Jan 2022 19:12:52 -0500 Sasha Levin wrote:
> > From: Ignat Korchagin <ignat@cloudflare.com>
> >
> > [ Upstream commit ed6ae5ca437d9d238117d90e95f7f2cc27da1b31 ]
> >
> > While experimenting with FOU encapsulation Amir noticed that encapsulated IPv6
> > traffic fails to be delivered, if the peer IP address is configured locally.
>
> Unless Ignat and Amir need it I'd vote for not backporting this to LTS.
> This patch is firmly in the "this configuration was never supported"
> category. 5.15 and 5.16 are probably fine.
We planned to use it on 5.15 and onwards. Not backporting to 5.10 is
fine for us.
^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2022-01-24 15:55 UTC | newest]
Thread overview: 6+ messages (download: mbox.gz / follow: Atom feed)
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2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 3/9] sit: allow encapsulated IPv6 traffic to be delivered locally Sasha Levin
2022-01-24 15:50 ` Jakub Kicinski
2022-01-24 15:55 ` Ignat Korchagin
2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 5/9] net: apple: mace: Fix build since dev_addr constification Sasha Levin
2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 6/9] net: apple: bmac: " Sasha Levin
2022-01-23 0:12 ` [PATCH AUTOSEL 5.10 8/9] vhost/test: fix memory leak of vhost virtqueues Sasha Levin
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