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Date: Mon, 23 May 2022 19:03:35 +0200 From: Greg Kroah-Hartman <gregkh@...uxfoundation.org> To: linux-kernel@...r.kernel.org Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>, stable@...r.kernel.org, Jiasheng Jiang <jiasheng@...as.ac.cn>, Steffen Klassert <steffen.klassert@...unet.com>, Sasha Levin <sashal@...nel.org> Subject: [PATCH 4.9 17/25] net: af_key: add check for pfkey_broadcast in function pfkey_process From: Jiasheng Jiang <jiasheng@...as.ac.cn> [ Upstream commit 4dc2a5a8f6754492180741facf2a8787f2c415d7 ] If skb_clone() returns null pointer, pfkey_broadcast() will return error. Therefore, it should be better to check the return value of pfkey_broadcast() and return error if fails. Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2") Signed-off-by: Jiasheng Jiang <jiasheng@...as.ac.cn> Signed-off-by: Steffen Klassert <steffen.klassert@...unet.com> Signed-off-by: Sasha Levin <sashal@...nel.org> --- net/key/af_key.c | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/net/key/af_key.c b/net/key/af_key.c index c9cc9f75b099..776f94ecbfe6 100644 --- a/net/key/af_key.c +++ b/net/key/af_key.c @@ -2861,8 +2861,10 @@ static int pfkey_process(struct sock *sk, struct sk_buff *skb, const struct sadb void *ext_hdrs[SADB_EXT_MAX]; int err; - pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, - BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); + err = pfkey_broadcast(skb_clone(skb, GFP_KERNEL), GFP_KERNEL, + BROADCAST_PROMISC_ONLY, NULL, sock_net(sk)); + if (err) + return err; memset(ext_hdrs, 0, sizeof(ext_hdrs)); err = parse_exthdrs(skb, hdr, ext_hdrs); -- 2.35.1
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