[PATCH AUTOSEL 5.10 07/26] ipv6: delay fib6_sernum increase in fib6_add

From: Sasha Levin
Date: Wed Sep 22 2021 - 23:40:27 EST


From: zhang kai <zhangkaiheb@xxxxxxx>

[ Upstream commit e87b5052271e39d62337ade531992b7e5d8c2cfa ]

only increase fib6_sernum in net namespace after add fib6_info
successfully.

Signed-off-by: zhang kai <zhangkaiheb@xxxxxxx>
Reviewed-by: David Ahern <dsahern@xxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
net/ipv6/ip6_fib.c | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/net/ipv6/ip6_fib.c b/net/ipv6/ip6_fib.c
index 1fb79dbde0cb..e43f1fbac28b 100644
--- a/net/ipv6/ip6_fib.c
+++ b/net/ipv6/ip6_fib.c
@@ -1376,7 +1376,6 @@ int fib6_add(struct fib6_node *root, struct fib6_info *rt,
int err = -ENOMEM;
int allow_create = 1;
int replace_required = 0;
- int sernum = fib6_new_sernum(info->nl_net);

if (info->nlh) {
if (!(info->nlh->nlmsg_flags & NLM_F_CREATE))
@@ -1476,7 +1475,7 @@ int fib6_add(struct fib6_node *root, struct fib6_info *rt,
if (!err) {
if (rt->nh)
list_add(&rt->nh_list, &rt->nh->f6i_list);
- __fib6_update_sernum_upto_root(rt, sernum);
+ __fib6_update_sernum_upto_root(rt, fib6_new_sernum(info->nl_net));
fib6_start_gc(info->nl_net, rt);
}

--
2.30.2