This is a note to let you know that I've just added the patch titled ipv6: Continue processing multipath route even if gateway attribute is invalid to the 4.19-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: ipv6-continue-processing-multipath-route-even-if-gat.patch and it can be found in the queue-4.19 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. commit 7e10f4e33eb2e52bd7645efb9a90d8aca904e0b7 Author: David Ahern <dsahern@xxxxxxxxxx> Date: Mon Jan 3 10:19:11 2022 -0700 ipv6: Continue processing multipath route even if gateway attribute is invalid [ Upstream commit e30a845b0376eb51c9c94f56bbd53b2e08ba822f ] ip6_route_multipath_del loop continues processing the multipath attribute even if delete of a nexthop path fails. For consistency, do the same if the gateway attribute is invalid. Fixes: 1ff15a710a86 ("ipv6: Check attribute length for RTA_GATEWAY when deleting multipath route") Signed-off-by: David Ahern <dsahern@xxxxxxxxxx> Acked-by: Nicolas Dichtel <nicolas.dichtel@xxxxxxxxx> Link: https://lore.kernel.org/r/20220103171911.94739-1-dsahern@xxxxxxxxxx Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx> Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx> diff --git a/net/ipv6/route.c b/net/ipv6/route.c index 1bc81be07ccda..8a437c20eeccd 100644 --- a/net/ipv6/route.c +++ b/net/ipv6/route.c @@ -4608,8 +4608,10 @@ static int ip6_route_multipath_del(struct fib6_config *cfg, if (nla) { err = fib6_gw_from_attr(&r_cfg.fc_gateway, nla, extack); - if (err) - return err; + if (err) { + last_err = err; + goto next_rtnh; + } r_cfg.fc_flags |= RTF_GATEWAY; } @@ -4618,6 +4620,7 @@ static int ip6_route_multipath_del(struct fib6_config *cfg, if (err) last_err = err; +next_rtnh: rtnh = rtnh_next(rtnh, &remaining); }