6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Ido Schimmel idosch@nvidia.com
[ 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@nvidia.com Reviewed-by: Guillaume Nault gnault@redhat.com Signed-off-by: David S. Miller davem@davemloft.net Stable-dep-of: 27843ce6ba3d ("ipvlan: ensure network headers are in skb linear part") Signed-off-by: Sasha Levin sashal@kernel.org --- 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;