This is a note to let you know that I've just added the patch titled
neighbour: fix unaligned access to pneigh_entry
to the 5.4-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
neighbour-fix-unaligned-access-to-pneigh_entry.patch
and it can be found in the queue-5.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 9582d609e5df9da30ae0cd73f194f1a247060c94
Author: Qingfang DENG <qingfang.deng@xxxxxxxxxxxxxxx>
Date: Thu Jun 1 09:54:32 2023 +0800
neighbour: fix unaligned access to pneigh_entry
[ Upstream commit ed779fe4c9b5a20b4ab4fd6f3e19807445bb78c7 ]
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: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/include/net/neighbour.h b/include/net/neighbour.h
index 729bdf710b7e0..e595e944ebfc0 100644
--- a/include/net/neighbour.h
+++ b/include/net/neighbour.h
@@ -174,7 +174,7 @@ struct pneigh_entry {
struct net_device *dev;
u8 flags;
u8 protocol;
- u8 key[];
+ u32 key[];
};
/*
