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netdev-genl: Hold rcu_read_lock in napi_get

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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: 27f91aaf49 ("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>
This commit is contained in:
Joe Damato
2024-11-14 17:51:56 +00:00
committed by Greg Kroah-Hartman
parent b6a1ba1915
commit 343e3e903c
1 changed files with 2 additions and 0 deletions
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2
net/core/netdev-genl.c
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@@ -215,6 +215,7 @@ int netdev_nl_napi_get_doit(struct sk_buff *skb, struct genl_info *info)
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_buff *skb, struct genl_info *info)
err = -ENOENT;
}
rcu_read_unlock();
rtnl_unlock();
if (err)