git.openwrt.org Git - openwrt/staging/stintel.git/blob

   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 = {