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Miller" , Eric Dumazet , Harald Welte , Jakub Kicinski , Pablo Neira Ayuso , Paolo Abeni Cc: stable@vger.kernel.org, LKML References: <20261110-gtp-echo-rsp-leak-v1-1-192c032f3dfa@gmail.com> Subject: Re: [PATCH net] gtp: free the skb after handling an echo response Content-Language: en-GB, de-DE From: Markus Elfring In-Reply-To: <20261110-gtp-echo-rsp-leak-v1-1-192c032f3dfa@gmail.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable X-Provags-ID: V03:K1:HeVayAa2KrEcOqstVPg4EgmvefaHAhOk7cFpThm52hpSQLPuNt8 UnlTGJbg4OH6lUVsI3c9pR9tNTpQqqzlE1d1+Zodr5LzHjKMRS+KNy8rFkiuG7v23ezR3fh q3gUEn9E72xqWg6Oh6uNmFMCqxLZYG6YuJi2rZX/kWS+vg7UAe9Fe+cCMtqXo2DhUp1O/uH SlhWdS5/JS1Upww508zeQ== X-Spam-Flag: NO UI-OutboundReport: notjunk:1;M01:P0:l/NAFTUjf9M=;sZOIV2CAxRLAk9SU/XYI/MOtvPf kdNp1eXyZYvxLFL42oZ3vZwRhZ7mNl3PFF605Tg4WjwkNHG+m7FPZK9dDsw/LAEa1qJS8aJmU zTDGLFW8BpPe4aF8qThzGjdSObWdruv8quFzKGHE/csG0OkBq0k+f+FLMnH0e5QD6Y9Lwq44/ 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zS6BUT81uGHSzxGI+Nz+YqbE4UH6SDq2ICAFYjbluZv5CkdUaQv0P3oczV61j4JBA== =E2=80=A6 > +++ b/drivers/net/gtp.c > @@ -561,16 +561,19 @@ static int gtp0_handle_echo_resp(struct gtp_dev *g= tp, struct sk_buff *skb) =E2=80=A6 > - return genlmsg_multicast_netns(>p_genl_family, dev_net(gtp->dev), > - msg, 0, GTP_GENL_MCGRP, GFP_ATOMIC); > + genlmsg_multicast_netns(>p_genl_family, dev_net(gtp->dev), > + msg, 0, GTP_GENL_MCGRP, GFP_ATOMIC); > + consume_skb(skb); > + > + return 0; > } =E2=80=A6 I suggest to reconsider the error detection a bit more. https://elixir.bootlin.com/linux/v7.3.1/source/drivers/net/gtp.c#L541-L573 https://cwe.mitre.org/data/definitions/252.html Regards, Markus