5.15-stable review patch. If anyone has any objections, please let me know.
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From: Benjamin Poirier bpoirier@nvidia.com
[ Upstream commit 0add5c597f3253a9c6108a0a81d57f44ab0d9d30 ]
Due to a small omission, the offload_failed flag is missing from ipv4 fibmatch results. Make sure it is set correctly.
The issue can be witnessed using the following commands: echo "1 1" > /sys/bus/netdevsim/new_device ip link add dummy1 up type dummy ip route add 192.0.2.0/24 dev dummy1 echo 1 > /sys/kernel/debug/netdevsim/netdevsim1/fib/fail_route_offload ip route add 198.51.100.0/24 dev dummy1 ip route # 192.168.15.0/24 has rt_trap # 198.51.100.0/24 has rt_offload_failed ip route get 192.168.15.1 fibmatch # Result has rt_trap ip route get 198.51.100.1 fibmatch # Result differs from the route shown by `ip route`, it is missing # rt_offload_failed ip link del dev dummy1 echo 1 > /sys/bus/netdevsim/del_device
Fixes: 36c5100e859d ("IPv4: Add "offload failed" indication to routes") Signed-off-by: Benjamin Poirier bpoirier@nvidia.com Reviewed-by: Ido Schimmel idosch@nvidia.com Reviewed-by: Simon Horman horms@kernel.org Reviewed-by: David Ahern dsahern@kernel.org Link: https://lore.kernel.org/r/20230926182730.231208-1-bpoirier@nvidia.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- net/ipv4/route.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/net/ipv4/route.c b/net/ipv4/route.c index 968cc4aa6e96c..ea5329cb0fce2 100644 --- a/net/ipv4/route.c +++ b/net/ipv4/route.c @@ -3430,6 +3430,8 @@ static int inet_rtm_getroute(struct sk_buff *in_skb, struct nlmsghdr *nlh, fa->fa_type == fri.type) { fri.offload = READ_ONCE(fa->offload); fri.trap = READ_ONCE(fa->trap); + fri.offload_failed = + READ_ONCE(fa->offload_failed); break; } }