* [PATCH nf] netfilter: nf_queue: enqueue skbs with NULL dst
@ 2019-12-02 18:42 Marco Oliverio
2019-12-02 21:51 ` Matteo Croce
0 siblings, 1 reply; 8+ messages in thread
From: Marco Oliverio @ 2019-12-02 18:42 UTC (permalink / raw)
To: rocco.folino; +Cc: netdev, fw, Marco Oliverio
Bridge packets that are forwarded have skb->dst == NULL and get
dropped by the check introduced by
b60a77386b1d4868f72f6353d35dabe5fbe981f2 (net: make skb_dst_force
return true when dst is refcounted).
To fix this we check skb_dst() before skb_dst_force(), so we don't
drop skb packet with dst == NULL. This holds also for skb at the
PRE_ROUTING hook so we remove the second check.
Fixes: b60a773 ("net: make skb_dst_forcereturn true when dst is refcounted")
Signed-off-by: Marco Oliverio <marco.oliverio@tanaza.com>
Signed-off-by: Rocco Folino <rocco.folino@tanaza.com>
---
net/netfilter/nf_queue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c
index a2b58de82600..f8f52ff99cfb 100644
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -189,7 +189,7 @@ static int __nf_queue(struct sk_buff *skb, const struct nf_hook_state *state,
goto err;
}
- if (!skb_dst_force(skb) && state->hook != NF_INET_PRE_ROUTING) {
+ if (skb_dst(skb) && !skb_dst_force(skb)) {
status = -ENETDOWN;
goto err;
}
--
2.24.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* Re: [PATCH nf] netfilter: nf_queue: enqueue skbs with NULL dst
2019-12-02 18:42 [PATCH nf] netfilter: nf_queue: enqueue skbs with NULL dst Marco Oliverio
@ 2019-12-02 21:51 ` Matteo Croce
0 siblings, 0 replies; 8+ messages in thread
From: Matteo Croce @ 2019-12-02 21:51 UTC (permalink / raw)
To: Marco Oliverio; +Cc: rocco.folino, netdev, Florian Westphal
On Mon, Dec 2, 2019 at 7:43 PM Marco Oliverio <marco.oliverio@tanaza.com> wrote:
>
> Bridge packets that are forwarded have skb->dst == NULL and get
> dropped by the check introduced by
> b60a77386b1d4868f72f6353d35dabe5fbe981f2 (net: make skb_dst_force
> return true when dst is refcounted).
>
> To fix this we check skb_dst() before skb_dst_force(), so we don't
> drop skb packet with dst == NULL. This holds also for skb at the
> PRE_ROUTING hook so we remove the second check.
>
> Fixes: b60a773 ("net: make skb_dst_forcereturn true when dst is refcounted")
>
> Signed-off-by: Marco Oliverio <marco.oliverio@tanaza.com>
> Signed-off-by: Rocco Folino <rocco.folino@tanaza.com>
Tested-by: Matteo Croce <mcroce@redhat.com>
--
Matteo Croce
per aspera ad upstream
^ permalink raw reply [flat|nested] 8+ messages in thread
* [PATCH nf] netfilter: nf_queue: enqueue skbs with NULL dst
@ 2019-12-02 18:43 Marco Oliverio
0 siblings, 0 replies; 8+ messages in thread
From: Marco Oliverio @ 2019-12-02 18:43 UTC (permalink / raw)
To: rocco.folino; +Cc: netdev, fw, Marco Oliverio
Bridge packets that are forwarded have skb->dst == NULL and get
dropped by the check introduced by
b60a77386b1d4868f72f6353d35dabe5fbe981f2 (net: make skb_dst_force
return true when dst is refcounted).
To fix this we check skb_dst() before skb_dst_force(), so we don't
drop skb packet with dst == NULL. This holds also for skb at the
PRE_ROUTING hook so we remove the second check.
Fixes: b60a773 ("net: make skb_dst_forcereturn true when dst is refcounted")
Signed-off-by: Marco Oliverio <marco.oliverio@tanaza.com>
Signed-off-by: Rocco Folino <rocco.folino@tanaza.com>
---
net/netfilter/nf_queue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c
index a2b58de82600..f8f52ff99cfb 100644
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -189,7 +189,7 @@ static int __nf_queue(struct sk_buff *skb, const struct nf_hook_state *state,
goto err;
}
- if (!skb_dst_force(skb) && state->hook != NF_INET_PRE_ROUTING) {
+ if (skb_dst(skb) && !skb_dst_force(skb)) {
status = -ENETDOWN;
goto err;
}
--
2.24.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH nf] netfilter: nf_queue: enqueue skbs with NULL dst
@ 2019-12-02 18:45 Marco Oliverio
0 siblings, 0 replies; 8+ messages in thread
From: Marco Oliverio @ 2019-12-02 18:45 UTC (permalink / raw)
To: marco.oliverio; +Cc: netdev, fw, rocco.folino
Bridge packets that are forwarded have skb->dst == NULL and get
dropped by the check introduced by
b60a77386b1d4868f72f6353d35dabe5fbe981f2 (net: make skb_dst_force
return true when dst is refcounted).
To fix this we check skb_dst() before skb_dst_force(), so we don't
drop skb packet with dst == NULL. This holds also for skb at the
PRE_ROUTING hook so we remove the second check.
Fixes: b60a773 ("net: make skb_dst_forcereturn true when dst is refcounted")
Signed-off-by: Marco Oliverio <marco.oliverio@tanaza.com>
Signed-off-by: Rocco Folino <rocco.folino@tanaza.com>
---
net/netfilter/nf_queue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c
index a2b58de82600..f8f52ff99cfb 100644
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -189,7 +189,7 @@ static int __nf_queue(struct sk_buff *skb, const struct nf_hook_state *state,
goto err;
}
- if (!skb_dst_force(skb) && state->hook != NF_INET_PRE_ROUTING) {
+ if (skb_dst(skb) && !skb_dst_force(skb)) {
status = -ENETDOWN;
goto err;
}
--
2.24.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* [PATCH nf] netfilter: nf_queue: enqueue skbs with NULL dst
@ 2019-12-02 18:54 Marco Oliverio
2019-12-02 18:58 ` Florian Westphal
` (2 more replies)
0 siblings, 3 replies; 8+ messages in thread
From: Marco Oliverio @ 2019-12-02 18:54 UTC (permalink / raw)
To: netfilter-devel; +Cc: netdev, fw, rocco.folino, Marco Oliverio
Bridge packets that are forwarded have skb->dst == NULL and get
dropped by the check introduced by
b60a77386b1d4868f72f6353d35dabe5fbe981f2 (net: make skb_dst_force
return true when dst is refcounted).
To fix this we check skb_dst() before skb_dst_force(), so we don't
drop skb packet with dst == NULL. This holds also for skb at the
PRE_ROUTING hook so we remove the second check.
Fixes: b60a773 ("net: make skb_dst_forcereturn true when dst is refcounted")
Signed-off-by: Marco Oliverio <marco.oliverio@tanaza.com>
Signed-off-by: Rocco Folino <rocco.folino@tanaza.com>
---
net/netfilter/nf_queue.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/net/netfilter/nf_queue.c b/net/netfilter/nf_queue.c
index a2b58de82600..f8f52ff99cfb 100644
--- a/net/netfilter/nf_queue.c
+++ b/net/netfilter/nf_queue.c
@@ -189,7 +189,7 @@ static int __nf_queue(struct sk_buff *skb, const struct nf_hook_state *state,
goto err;
}
- if (!skb_dst_force(skb) && state->hook != NF_INET_PRE_ROUTING) {
+ if (skb_dst(skb) && !skb_dst_force(skb)) {
status = -ENETDOWN;
goto err;
}
--
2.24.0
^ permalink raw reply related [flat|nested] 8+ messages in thread* Re: [PATCH nf] netfilter: nf_queue: enqueue skbs with NULL dst
2019-12-02 18:54 Marco Oliverio
@ 2019-12-02 18:58 ` Florian Westphal
2019-12-02 19:04 ` Marco Oliverio
2019-12-07 18:52 ` Pablo Neira Ayuso
2 siblings, 0 replies; 8+ messages in thread
From: Florian Westphal @ 2019-12-02 18:58 UTC (permalink / raw)
To: Marco Oliverio; +Cc: netfilter-devel, netdev, fw, rocco.folino
Marco Oliverio <marco.oliverio@tanaza.com> wrote:
> Bridge packets that are forwarded have skb->dst == NULL and get
> dropped by the check introduced by
> b60a77386b1d4868f72f6353d35dabe5fbe981f2 (net: make skb_dst_force
> return true when dst is refcounted).
Acked-by: Florian Westphal <fw@strlen.de>
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH nf] netfilter: nf_queue: enqueue skbs with NULL dst
2019-12-02 18:54 Marco Oliverio
2019-12-02 18:58 ` Florian Westphal
@ 2019-12-02 19:04 ` Marco Oliverio
2019-12-07 18:52 ` Pablo Neira Ayuso
2 siblings, 0 replies; 8+ messages in thread
From: Marco Oliverio @ 2019-12-02 19:04 UTC (permalink / raw)
To: Marco Oliverio; +Cc: netfilter-devel, netdev, fw, rocco.folino
Marco Oliverio writes:
> Bridge packets that are forwarded have skb->dst == NULL and get
> dropped by the check introduced by
> ...
ops. sorry for the multiple emails, made a mess :-)
Refer to this thread.
M
^ permalink raw reply [flat|nested] 8+ messages in thread
* Re: [PATCH nf] netfilter: nf_queue: enqueue skbs with NULL dst
2019-12-02 18:54 Marco Oliverio
2019-12-02 18:58 ` Florian Westphal
2019-12-02 19:04 ` Marco Oliverio
@ 2019-12-07 18:52 ` Pablo Neira Ayuso
2 siblings, 0 replies; 8+ messages in thread
From: Pablo Neira Ayuso @ 2019-12-07 18:52 UTC (permalink / raw)
To: Marco Oliverio; +Cc: netfilter-devel, netdev, fw, rocco.folino
On Mon, Dec 02, 2019 at 07:54:30PM +0100, Marco Oliverio wrote:
> Bridge packets that are forwarded have skb->dst == NULL and get
> dropped by the check introduced by
> b60a77386b1d4868f72f6353d35dabe5fbe981f2 (net: make skb_dst_force
> return true when dst is refcounted).
>
> To fix this we check skb_dst() before skb_dst_force(), so we don't
> drop skb packet with dst == NULL. This holds also for skb at the
> PRE_ROUTING hook so we remove the second check.
Applied, thanks.
^ permalink raw reply [flat|nested] 8+ messages in thread
end of thread, other threads:[~2019-12-07 18:52 UTC | newest]
Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2019-12-02 18:42 [PATCH nf] netfilter: nf_queue: enqueue skbs with NULL dst Marco Oliverio
2019-12-02 21:51 ` Matteo Croce
2019-12-02 18:43 Marco Oliverio
2019-12-02 18:45 Marco Oliverio
2019-12-02 18:54 Marco Oliverio
2019-12-02 18:58 ` Florian Westphal
2019-12-02 19:04 ` Marco Oliverio
2019-12-07 18:52 ` Pablo Neira Ayuso
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