6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ido Schimmel <idosch@xxxxxxxxxx>
[ Upstream commit 4805646c42e51d2fbf142864d281473ad453ad5d ]
The function is called to resolve a route for an ICMP message that is
sent in response to a situation. Based on the type of the generated ICMP
message, the function is either passed the DS field of the packet that
generated the ICMP message or a DS field that is derived from it.
Unmask the upper DSCP bits before resolving and output route via
ip_route_output_key_hash() so that in the future the lookup could be
performed according to the full DSCP value.
Signed-off-by: Ido Schimmel <idosch@xxxxxxxxxx>
Reviewed-by: Guillaume Nault <gnault@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Stable-dep-of: 27843ce6ba3d ("ipvlan: ensure network headers are in skb linear part")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/ipv4/icmp.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/net/ipv4/icmp.c b/net/ipv4/icmp.c
index 3807a269e0755..a154339845dd4 100644
--- a/net/ipv4/icmp.c
+++ b/net/ipv4/icmp.c
@@ -93,6 +93,7 @@
#include <net/ip_fib.h>
#include <net/l3mdev.h>
#include <net/addrconf.h>
+#include <net/inet_dscp.h>
#define CREATE_TRACE_POINTS
#include <trace/events/icmp.h>
@@ -502,7 +503,7 @@ static struct rtable *icmp_route_lookup(struct net *net,
fl4->saddr = saddr;
fl4->flowi4_mark = mark;
fl4->flowi4_uid = sock_net_uid(net, NULL);
- fl4->flowi4_tos = RT_TOS(tos);
+ fl4->flowi4_tos = tos & INET_DSCP_MASK;
fl4->flowi4_proto = IPPROTO_ICMP;
fl4->fl4_icmp_type = type;
fl4->fl4_icmp_code = code;
--
2.39.5
