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phonet: fix rtm_phonet_notify() skb allocation

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[ Upstream commit d8cac85686 ]

fill_route() stores three components in the skb:

- struct rtmsg
- RTA_DST (u8)
- RTA_OIF (u32)

Therefore, rtm_phonet_notify() should use

NLMSG_ALIGN(sizeof(struct rtmsg)) +
nla_total_size(1) +
nla_total_size(4)

Fixes: f062f41d06 ("Phonet: routing table Netlink interface")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Acked-by: Rémi Denis-Courmont <courmisch@gmail.com>
Link: https://lore.kernel.org/r/20240502161700.1804476-1-edumazet@google.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Eric Dumazet 2024-05-02 16:17:00 +00:00 committed by Greg Kroah-Hartman
parent 544895ba02
commit 728a83160f
1 changed files with 1 additions and 1 deletions
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2
net/phonet/pn_netlink.c
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@ -193,7 +193,7 @@ void rtm_phonet_notify(int event, struct net_device *dev, u8 dst)
struct sk_buff *skb;
int err = -ENOBUFS;
skb = nlmsg_new(NLMSG_ALIGN(sizeof(struct ifaddrmsg)) +
skb = nlmsg_new(NLMSG_ALIGN(sizeof(struct rtmsg)) +
nla_total_size(1) + nla_total_size(4), GFP_KERNEL);
if (skb == NULL)
goto errout;