From ed779fe4c9b5a20b4ab4fd6f3e19807445bb78c7 Mon Sep 17 00:00:00 2001
From: Qingfang DENG <qingfang.deng@siflower.com.cn>
Date: Thu, 1 Jun 2023 09:54:32 +0800
Subject: [PATCH] neighbour: fix unaligned access to pneigh_entry
After the blamed commit, the member key is longer 4-byte aligned. On
platforms that do not support unaligned access, e.g., MIPS32R2 with
unaligned_action set to 1, this will trigger a crash when accessing
an IPv6 pneigh_entry, as the key is cast to an in6_addr pointer.
Change the type of the key to u32 to make it aligned.
Fixes: 62dd93181aaa ("[IPV6] NDISC: Set per-entry is_router flag in Proxy NA.")
Signed-off-by: Qingfang DENG <qingfang.deng@siflower.com.cn>
Link: https://lore.kernel.org/r/20230601015432.159066-1-dqfext@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
---
include/net/neighbour.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 3fa5774bddac3..f6a8ecc6b1fa7 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -180,7 +180,7 @@ struct pneigh_entry {
netdevice_tracker dev_tracker;
u32 flags;
u8 protocol;
- u8 key[];
+ u32 key[];
};
/*
--
2.30.2