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From:   Ganesh Babu <ganesh.babu@ekinops.com>
To:     "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
CC:     Ganesh Babu <ganesh.babu@ekinops.com>
Subject: [PATCH] net: mroute6.h: change type of mif6c_pifi to __u32
Thread-Topic: [PATCH] net: mroute6.h: change type of mif6c_pifi to __u32
Thread-Index: AQHZYUP13XlrMpW17Ue8ZSjM0wOOKw==
Date:   Tue, 28 Mar 2023 07:13:03 +0000
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From a91f11fe060729d0009a3271e3a92cead88e2656 Mon Sep 17 00:00:00 2001=0A=
From: "Ganesh Babu" <ganesh.babu@ekinops.com>=0A=
Date: Wed, 15 Mar 2023 15:01:39 +0530=0A=
Subject: [PATCH] net: mroute6.h: change type of mif6c_pifi to __u32=0A=
=0A=
Increase mif6c_pifi field in mif6ctl struct=0A=
from 16 to 32 bits to support 32-bit ifindices.=0A=
The field stores the physical interface (ifindex) for a multicast group.=0A=
Passing a 32-bit ifindex via MRT6_ADD_MIF socket option=0A=
from user space can cause unpredictable behavior in PIM6.=0A=
Changing mif6c_pifi to __u32 allows kernel to handle=0A=
32-bit ifindex values without issues.=0A=
=0A=
---=0A=
=A0include/uapi/linux/mroute6.h | 2 +-=0A=
=A01 file changed, 1 insertion(+), 1 deletion(-)=0A=
=0A=
diff --git a/include/uapi/linux/mroute6.h b/include/uapi/linux/mroute6.h=0A=
index 1d90c21a6251..90e6e771beab 100644=0A=
--- a/include/uapi/linux/mroute6.h=0A=
+++ b/include/uapi/linux/mroute6.h=0A=
@@ -75,7 +75,7 @@ struct mif6ctl {=0A=
=A0 =A0 =A0 =A0 mifi_t =A0mif6c_mifi; =A0 =A0 =A0 =A0 =A0 =A0 /* Index of M=
IF */=0A=
=A0 =A0 =A0 =A0 unsigned char mif6c_flags; =A0 =A0 =A0/* MIFF_ flags */=0A=
=A0 =A0 =A0 =A0 unsigned char vifc_threshold; =A0 /* ttl limit */=0A=
- =A0 =A0 =A0 __u16 =A0 =A0mif6c_pifi; =A0 =A0 =A0 =A0 =A0 =A0/* the index =
of the physical IF */=0A=
+ =A0 =A0 =A0 __u32 =A0 =A0mif6c_pifi; =A0 =A0 =A0 =A0 =A0 =A0/* the index =
of the physical IF */=0A=
=A0 =A0 =A0 =A0 unsigned int vifc_rate_limit; =A0 /* Rate limiter values (N=
I) */=0A=
=A0};=0A=
=0A=
--=0A=
2.11.0=0A=
=0A=
Signed-off-by: Ganesh Babu <ganesh.babu@ekinops.com>=0A=
---=0A=