diff options
| author | Tom Herbert <tom@herbertland.com> | 2015-09-02 04:11:04 +0300 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-09-02 06:20:02 +0300 |
| commit | de4c1f8ba302ccf4f2b3b17dc614b0a0b14d351a (patch) | |
| tree | b8fb3ed074d6752702b7e31628cf19c454aab164 /include/linux/skbuff.h | |
| parent | 1bd40543534578f20889d5e999a0f184fd7ea88f (diff) | |
| download | linux-de4c1f8ba302ccf4f2b3b17dc614b0a0b14d351a.tar.xz | |
flow_dissector: Fix function argument ordering dependency
Commit c6cc1ca7f4d70c ("flowi: Abstract out functions to get flow hash
based on flowi") introduced a bug in __skb_set_sw_hash where we
require a dependency on evaluating arguments in a function in order.
There is no such ordering enforced in C, so this incorrect. This
patch fixes that by splitting out the arguments. This bug was
found via a compiler warning that keys may be uninitialized.
Signed-off-by: Tom Herbert <tom@herbertland.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/linux/skbuff.h')
| -rw-r--r-- | include/linux/skbuff.h | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/include/linux/skbuff.h b/include/linux/skbuff.h index 9e62687c70f3..eabfb810bc62 100644 --- a/include/linux/skbuff.h +++ b/include/linux/skbuff.h @@ -1035,9 +1035,9 @@ static inline __u32 skb_get_hash_flowi6(struct sk_buff *skb, struct flowi6 *fl6) { if (!skb->l4_hash && !skb->sw_hash) { struct flow_keys keys; + __u32 hash = __get_hash_from_flowi6(fl6, &keys); - __skb_set_sw_hash(skb, __get_hash_from_flowi6(fl6, &keys), - flow_keys_have_l4(&keys)); + __skb_set_sw_hash(skb, hash, flow_keys_have_l4(&keys)); } return skb->hash; @@ -1049,9 +1049,9 @@ static inline __u32 skb_get_hash_flowi4(struct sk_buff *skb, struct flowi4 *fl4) { if (!skb->l4_hash && !skb->sw_hash) { struct flow_keys keys; + __u32 hash = __get_hash_from_flowi4(fl4, &keys); - __skb_set_sw_hash(skb, __get_hash_from_flowi4(fl4, &keys), - flow_keys_have_l4(&keys)); + __skb_set_sw_hash(skb, hash, flow_keys_have_l4(&keys)); } return skb->hash; |