From: Qingfang DENG <qingfang.deng@xxxxxxxxxxxxxxx>
commit ed779fe4c9b5a20b4ab4fd6f3e19807445bb78c7 upstream.
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@xxxxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20230601015432.159066-1-dqfext@xxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
include/net/neighbour.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -172,7 +172,7 @@ struct pneigh_entry {
possible_net_t net;
struct net_device *dev;
u8 flags;
- u8 key[0];
+ u32 key[0];
};
/*
Patches currently in stable-queue which might be from qingfang.deng@xxxxxxxxxxxxxxx are
queue-4.19/neighbour-fix-unaligned-access-to-pneigh_entry.patch
