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Message-ID: <PAZP264MB4064279CBAB0D7672726F4A1FC889@PAZP264MB4064.FRAP264.PROD.OUTLOOK.COM> Date: Tue, 28 Mar 2023 07:13:03 +0000 From: Ganesh Babu <ganesh.babu@...nops.com> To: "netdev@...r.kernel.org" <netdev@...r.kernel.org>, "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org> CC: Ganesh Babu <ganesh.babu@...nops.com> Subject: [PATCH] net: mroute6.h: change type of mif6c_pifi to __u32 >From a91f11fe060729d0009a3271e3a92cead88e2656 Mon Sep 17 00:00:00 2001 From: "Ganesh Babu" <ganesh.babu@...nops.com> Date: Wed, 15 Mar 2023 15:01:39 +0530 Subject: [PATCH] net: mroute6.h: change type of mif6c_pifi to __u32 Increase mif6c_pifi field in mif6ctl struct from 16 to 32 bits to support 32-bit ifindices. The field stores the physical interface (ifindex) for a multicast group. Passing a 32-bit ifindex via MRT6_ADD_MIF socket option from user space can cause unpredictable behavior in PIM6. Changing mif6c_pifi to __u32 allows kernel to handle 32-bit ifindex values without issues. --- include/uapi/linux/mroute6.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/include/uapi/linux/mroute6.h b/include/uapi/linux/mroute6.h index 1d90c21a6251..90e6e771beab 100644 --- a/include/uapi/linux/mroute6.h +++ b/include/uapi/linux/mroute6.h @@ -75,7 +75,7 @@ struct mif6ctl { mifi_t mif6c_mifi; /* Index of MIF */ unsigned char mif6c_flags; /* MIFF_ flags */ unsigned char vifc_threshold; /* ttl limit */ - __u16 mif6c_pifi; /* the index of the physical IF */ + __u32 mif6c_pifi; /* the index of the physical IF */ unsigned int vifc_rate_limit; /* Rate limiter values (NI) */ }; -- 2.11.0 Signed-off-by: Ganesh Babu <ganesh.babu@...nops.com> ---
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