From 4deef2d865efdc61d1a53ad7bd48f9dd42560b45 Mon Sep 17 00:00:00 2001 From: Maciej Rabeda Date: Wed, 1 Apr 2020 11:43:55 +0200 Subject: [PATCH] NetworkPkg/Ip6Dxe: Fix ASSERT logic in Ip6ProcessRouterAdvertise() REF: https://bugzilla.tianocore.org/show_bug.cgi?id=2655 This patch fixes reversed logic of recently added ASSERTs which should ensure that Ip6IsNDOptionValid() implementation properly reacts to invalid packets. Cc: Jiaxin Wu Cc: Siyuan Fu Signed-off-by: Maciej Rabeda Reviewed-by: Siyuan Fu Tested-by: Laszlo Ersek Fixes: 9c20342eed70ec99ec50cd73cb81804299f05403 --- NetworkPkg/Ip6Dxe/Ip6Nd.c | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/NetworkPkg/Ip6Dxe/Ip6Nd.c b/NetworkPkg/Ip6Dxe/Ip6Nd.c index fd7f60b2f9..0780a98cb3 100644 --- a/NetworkPkg/Ip6Dxe/Ip6Nd.c +++ b/NetworkPkg/Ip6Dxe/Ip6Nd.c @@ -2111,7 +2111,7 @@ Ip6ProcessRouterAdvertise ( // Option size validity ensured by Ip6IsNDOptionValid(). // ASSERT (LinkLayerOption.Length != 0); - ASSERT (Offset + (UINT32) LinkLayerOption.Length * 8 >= (UINT32) Head->PayloadLength); + ASSERT (Offset + (UINT32) LinkLayerOption.Length * 8 <= (UINT32) Head->PayloadLength); ZeroMem (&LinkLayerAddress, sizeof (EFI_MAC_ADDRESS)); CopyMem (&LinkLayerAddress, LinkLayerOption.EtherAddr, 6); @@ -2164,7 +2164,7 @@ Ip6ProcessRouterAdvertise ( // Option size validity ensured by Ip6IsNDOptionValid(). // ASSERT (PrefixOption.Length == 4); - ASSERT (Offset + (UINT32) PrefixOption.Length * 8 >= (UINT32) Head->PayloadLength); + ASSERT (Offset + (UINT32) PrefixOption.Length * 8 <= (UINT32) Head->PayloadLength); PrefixOption.ValidLifetime = NTOHL (PrefixOption.ValidLifetime); PrefixOption.PreferredLifetime = NTOHL (PrefixOption.PreferredLifetime); @@ -2334,7 +2334,7 @@ Ip6ProcessRouterAdvertise ( // Option size validity ensured by Ip6IsNDOptionValid(). // ASSERT (MTUOption.Length == 1); - ASSERT (Offset + (UINT32) MTUOption.Length * 8 >= (UINT32) Head->PayloadLength); + ASSERT (Offset + (UINT32) MTUOption.Length * 8 <= (UINT32) Head->PayloadLength); // // Use IPv6 minimum link MTU 1280 bytes as the maximum packet size in order -- 2.39.2