* [PATCH][V2] flow dissector: check if arp_eth is null rather than arp
@ 2017-01-13 18:48 Colin King
2017-01-13 19:02 ` Eric Dumazet
2017-01-16 18:49 ` David Miller
0 siblings, 2 replies; 3+ messages in thread
From: Colin King @ 2017-01-13 18:48 UTC (permalink / raw)
To: David S . Miller, Alexander Duyck, Jiri Pirko, Tom Herbert,
Eric Dumazet, Hadar Hen Zion, Simon Horman, Gao Feng, Amir Vadai,
netdev
Cc: linux-kernel
From: Colin Ian King <colin.king@canonical.com>
arp is being checked instead of arp_eth to see if the call to
__skb_header_pointer failed. Fix this by checking arp_eth is
null instead of arp. Also fix to use length hlen rather than
hlen - sizeof(_arp); thanks to Eric Dumazet for spotting
this latter issue.
CoverityScan CID#1396428 ("Logically dead code") on 2nd
arp comparison (which should be arp_eth instead).
Fixes: commit 55733350e5e8b70c5 ("flow disector: ARP support")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
---
net/core/flow_dissector.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/net/core/flow_dissector.c b/net/core/flow_dissector.c
index e3dffc7..c35aae1 100644
--- a/net/core/flow_dissector.c
+++ b/net/core/flow_dissector.c
@@ -407,9 +407,9 @@ bool __skb_flow_dissect(const struct sk_buff *skb,
arp_eth = __skb_header_pointer(skb, nhoff + sizeof(_arp),
sizeof(_arp_eth), data,
- hlen - sizeof(_arp),
+ hlen,
&_arp_eth);
- if (!arp)
+ if (!arp_eth)
goto out_bad;
if (dissector_uses_key(flow_dissector,
--
2.10.2
^ permalink raw reply related [flat|nested] 3+ messages in thread
* Re: [PATCH][V2] flow dissector: check if arp_eth is null rather than arp
2017-01-13 18:48 [PATCH][V2] flow dissector: check if arp_eth is null rather than arp Colin King
@ 2017-01-13 19:02 ` Eric Dumazet
2017-01-16 18:49 ` David Miller
1 sibling, 0 replies; 3+ messages in thread
From: Eric Dumazet @ 2017-01-13 19:02 UTC (permalink / raw)
To: Colin King
Cc: David S . Miller, Alexander Duyck, Jiri Pirko, Tom Herbert,
Eric Dumazet, Hadar Hen Zion, Simon Horman, Gao Feng, Amir Vadai,
netdev, linux-kernel
On Fri, 2017-01-13 at 18:48 +0000, Colin King wrote:
> From: Colin Ian King <colin.king@canonical.com>
>
> arp is being checked instead of arp_eth to see if the call to
> __skb_header_pointer failed. Fix this by checking arp_eth is
> null instead of arp. Also fix to use length hlen rather than
> hlen - sizeof(_arp); thanks to Eric Dumazet for spotting
> this latter issue.
>
> CoverityScan CID#1396428 ("Logically dead code") on 2nd
> arp comparison (which should be arp_eth instead).
>
> Fixes: commit 55733350e5e8b70c5 ("flow disector: ARP support")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
> ---
Acked-by: Eric Dumazet <edumazet@google.com>
Thanks !
^ permalink raw reply [flat|nested] 3+ messages in thread
* Re: [PATCH][V2] flow dissector: check if arp_eth is null rather than arp
2017-01-13 18:48 [PATCH][V2] flow dissector: check if arp_eth is null rather than arp Colin King
2017-01-13 19:02 ` Eric Dumazet
@ 2017-01-16 18:49 ` David Miller
1 sibling, 0 replies; 3+ messages in thread
From: David Miller @ 2017-01-16 18:49 UTC (permalink / raw)
To: colin.king
Cc: aduyck, jiri, tom, edumazet, hadarh, simon.horman, fgao, amir,
netdev, linux-kernel
From: Colin King <colin.king@canonical.com>
Date: Fri, 13 Jan 2017 18:48:20 +0000
> From: Colin Ian King <colin.king@canonical.com>
>
> arp is being checked instead of arp_eth to see if the call to
> __skb_header_pointer failed. Fix this by checking arp_eth is
> null instead of arp. Also fix to use length hlen rather than
> hlen - sizeof(_arp); thanks to Eric Dumazet for spotting
> this latter issue.
>
> CoverityScan CID#1396428 ("Logically dead code") on 2nd
> arp comparison (which should be arp_eth instead).
>
> Fixes: commit 55733350e5e8b70c5 ("flow disector: ARP support")
> Signed-off-by: Colin Ian King <colin.king@canonical.com>
Applied, thanks.
^ permalink raw reply [flat|nested] 3+ messages in thread
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