6.12-stable review patch. If anyone has any objections, please let me know.
------------------
From: Joe Damato <jdamato@xxxxxxxxxx>
commit c53bf100f68619acf6cedcf4cf5249a1ca2db0b4 upstream.
Hold rcu_read_lock in netdev_nl_napi_get_doit, which calls napi_by_id
and is required to be called under rcu_read_lock.
Cc: stable@xxxxxxxxxxxxxxx
Fixes: 27f91aaf49b3 ("netdev-genl: Add netlink framework functions for napi")
Signed-off-by: Joe Damato <jdamato@xxxxxxxxxx>
Link: https://patch.msgid.link/20241114175157.16604-1-jdamato@xxxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
net/core/netdev-genl.c | 2 ++
1 file changed, 2 insertions(+)
--- a/net/core/netdev-genl.c
+++ b/net/core/netdev-genl.c
@@ -215,6 +215,7 @@ int netdev_nl_napi_get_doit(struct sk_bu
return -ENOMEM;
rtnl_lock();
+ rcu_read_lock();
napi = napi_by_id(napi_id);
if (napi) {
@@ -224,6 +225,7 @@ int netdev_nl_napi_get_doit(struct sk_bu
err = -ENOENT;
}
+ rcu_read_unlock();
rtnl_unlock();
if (err)
