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Sat, 01 Nov 2025 05:35:03 -0700 (PDT) From: Ranganath V N Date: Sat, 01 Nov 2025 18:04:48 +0530 Subject: [PATCH v2 2/2] net: sched: act_connmark: zero initialize the struct to avoid KMSAN Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20251101-infoleak-v2-2-01a501d41c09@gmail.com> References: <20251101-infoleak-v2-0-01a501d41c09@gmail.com> In-Reply-To: <20251101-infoleak-v2-0-01a501d41c09@gmail.com> To: Jamal Hadi Salim , Cong Wang , Jiri Pirko , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, skhan@linuxfoundation.org, david.hunter.linux@gmail.com, khalid@kernel.org, Ranganath V N X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1762000490; l=1124; i=vnranganath.20@gmail.com; s=20250816; h=from:subject:message-id; bh=5lljvy+eeKPbsrR97UeOzg7UMYKoHcYzDLWKuAQGdYE=; b=bNfAU7fFhFu8TXmm6LrwvsK/5elG10436Ao1RifFc2YEB/o84xMwIUoUqeEcARWUBz37FRUsC SgI8FmaDr2wBYAcMsXO0YTdp3BUjZOLvpN3TozwQf8vw5mi/iZdNnGH X-Developer-Key: i=vnranganath.20@gmail.com; a=ed25519; pk=7mxHFYWOcIJ5Ls8etzgLkcB0M8/hxmOh8pH6Mce5Z1A= zero initialize the struct to avoid the infoleak to the userspace. Signed-off-by: Ranganath V N --- net/sched/act_connmark.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/net/sched/act_connmark.c b/net/sched/act_connmark.c index 3e89927d7116..cf3cdfaaa34b 100644 --- a/net/sched/act_connmark.c +++ b/net/sched/act_connmark.c @@ -195,13 +195,15 @@ static inline int tcf_connmark_dump(struct sk_buff *s= kb, struct tc_action *a, const struct tcf_connmark_info *ci =3D to_connmark(a); unsigned char *b =3D skb_tail_pointer(skb); const struct tcf_connmark_parms *parms; - struct tc_connmark opt =3D { - .index =3D ci->tcf_index, - .refcnt =3D refcount_read(&ci->tcf_refcnt) - ref, - .bindcnt =3D atomic_read(&ci->tcf_bindcnt) - bind, - }; + struct tc_connmark opt; struct tcf_t t; =20 + memset(&opt, 0, sizeof(opt)); + + opt.index =3D ci->tcf_index, + opt.refcnt =3D refcount_read(&ci->tcf_refcnt) - ref, + opt.bindcnt =3D atomic_read(&ci->tcf_bindcnt) - bind, + rcu_read_lock(); parms =3D rcu_dereference(ci->parms); =20 --=20 2.43.0