mac80211: fix an unaligned access in the mesh hash table function
[openwrt/openwrt.git] / package / kernel / mac80211 / patches / subsys / 313-mac80211-fix-unaligned-access-in-mesh-table-hash-fun.patch
1 From: Felix Fietkau <nbd@nbd.name>
2 Date: Wed, 13 Mar 2019 18:52:56 +0100
3 Subject: [PATCH] mac80211: fix unaligned access in mesh table hash function
4
5 The pointer to the last four bytes of the address is not guaranteed to be
6 aligned, so we need to use __get_unaligned_cpu32 here
7
8 Signed-off-by: Felix Fietkau <nbd@nbd.name>
9 ---
10
11 --- a/net/mac80211/mesh_pathtbl.c
12 +++ b/net/mac80211/mesh_pathtbl.c
13 @@ -23,7 +23,7 @@ static void mesh_path_free_rcu(struct me
14 static u32 mesh_table_hash(const void *addr, u32 len, u32 seed)
15 {
16 /* Use last four bytes of hw addr as hash index */
17 - return jhash_1word(*(u32 *)(addr+2), seed);
18 + return jhash_1word(__get_unaligned_cpu32(addr+2), seed);
19 }
20
21 static const struct rhashtable_params mesh_rht_params = {