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mac80211: fix an unaligned access in the mesh hash table function

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Signed-off-by: Felix Fietkau <nbd@nbd.name>
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Felix Fietkau 2019-03-13 20:04:44 +01:00
parent fd8ca8deb3
commit fb0a80f4cf
1 changed files with 21 additions and 0 deletions
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package/kernel/mac80211/patches/subsys/313-mac80211-fix-unaligned-access-in-mesh-table-hash-fun.patch Normal file
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From: Felix Fietkau <nbd@nbd.name>
Date: Wed, 13 Mar 2019 18:52:56 +0100
Subject: [PATCH] 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 <nbd@nbd.name>
---
--- a/net/mac80211/mesh_pathtbl.c
+++ b/net/mac80211/mesh_pathtbl.c
@@ -23,7 +23,7 @@ static void mesh_path_free_rcu(struct me
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(addr+2), seed);
}
static const struct rhashtable_params mesh_rht_params = {