6.11-stable review patch. If anyone has any objections, please let me know.
------------------
From: Joe Damato jdamato@fastly.com
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@vger.kernel.org Fixes: 27f91aaf49b3 ("netdev-genl: Add netlink framework functions for napi") Signed-off-by: Joe Damato jdamato@fastly.com Link: https://patch.msgid.link/20241114175157.16604-1-jdamato@fastly.com Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- net/core/netdev-genl.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/net/core/netdev-genl.c +++ b/net/core/netdev-genl.c @@ -214,6 +214,7 @@ int netdev_nl_napi_get_doit(struct sk_bu return -ENOMEM;
rtnl_lock(); + rcu_read_lock();
napi = napi_by_id(napi_id); if (napi) { @@ -223,6 +224,7 @@ int netdev_nl_napi_get_doit(struct sk_bu err = -ENOENT; }
+ rcu_read_unlock(); rtnl_unlock();
if (err)