mac80211: fix unaligned access in mesh table hash function

The pointer to the last four bytes of the address is not guaranteed to be aligned, so we need to use __get_unaligned_cpu32 here Signed-off-by: Felix Fietkau <[email protected]> Signed-off-by: Johannes Berg <[email protected]>
ambv · Mar 29, 2019 · 40586e3 · 40586e3
1 parent b49c15e
commit 40586e3
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/net/mac80211/mesh_pathtbl.c b/net/mac80211/mesh_pathtbl.c
@@ -23,7 +23,7 @@ static void mesh_path_free_rcu(struct mesh_table *tbl, struct mesh_path *mpath);
 static u32 mesh_table_hash(const void *addr, u32 len, u32 seed)
 {
 	/* Use last four bytes of hw addr as hash index */
-	return jhash_1word(*(u32 *)(addr+2), seed);
+	return jhash_1word(__get_unaligned_cpu32((u8 *)addr + 2), seed);
 }
 
 static const struct rhashtable_params mesh_rht_params = {