From: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
To: Colin Ian King <colin.king@canonical.com>,
David Ahern <dsahern@kernel.org>,
"David S . Miller" <davem@davemloft.net>,
Alexey Kuznetsov <kuznet@ms2.inr.ac.ru>,
Hideaki YOSHIFUJI <yoshfuji@linux-ipv6.org>,
Jakub Kicinski <kuba@kernel.org>,
netdev@vger.kernel.org
Cc: kernel-janitors@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH][net-next] nexthop: fix incorrect allocation failure on nhg->spare
Date: Thu, 28 May 2020 15:55:09 +0000 [thread overview]
Message-ID: <e2c038f3-4990-d958-84a8-2aeaba8195f5@cumulusnetworks.com> (raw)
In-Reply-To: <b9cedb4b-d1bf-fd6d-f85e-444840c3924b@canonical.com>
On 28/05/2020 18:53, Colin Ian King wrote:
> On 28/05/2020 15:55, Nikolay Aleksandrov wrote:
>> On 28/05/2020 17:53, Nikolay Aleksandrov wrote:
>>> On 28/05/2020 17:51, Colin King wrote:
>>>> From: Colin Ian King <colin.king@canonical.com>
>>>>
>>>> The allocation failure check for nhg->spare is currently checking
>>>> the pointer nhg rather than nhg->spare which is never false. Fix
>>>> this by checking nhg->spare instead.
>>>>
>>>> Addresses-Coverity: ("Logically dead code")
>>>> Fixes: 430a049190de ("nexthop: Add support for nexthop groups")
>>>> Signed-off-by: Colin Ian King <colin.king@canonical.com>
>>>> ---
>>>> net/ipv4/nexthop.c | 2 +-
>>>> 1 file changed, 1 insertion(+), 1 deletion(-)
>>>>
>>>> diff --git a/net/ipv4/nexthop.c b/net/ipv4/nexthop.c
>>>> index ebafa5ed91ac..97423d6f2de9 100644
>>>> --- a/net/ipv4/nexthop.c
>>>> +++ b/net/ipv4/nexthop.c
>>>> @@ -1185,7 +1185,7 @@ static struct nexthop *nexthop_create_group(struct net *net,
>>>>
>>>> /* spare group used for removals */
>>>> nhg->spare = nexthop_grp_alloc(num_nh);
>>>> - if (!nhg) {
>>>> + if (!nhg->spare) {
>>>> kfree(nhg);
>>>> kfree(nh);
>>>> return NULL;
>>>>
>>>
>>> Good catch, embarrassing copy paste error :-/
>>> Acked-by: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
>>>
>>
>> Wait - that should be targeted at -net, that's where the fixes went.
>> And the fixes tag is wrong, nhg->spare was very recently added by:
>> commit 90f33bffa382
>> Author: Nikolay Aleksandrov <nikolay@cumulusnetworks.com>
>> Date: Tue May 26 12:56:15 2020 -0600
>>
>> nexthops: don't modify published nexthop groups
>>
>
> Do you require me to fix this up and re-send?
>
> Colin
>
Up to you, it will go to the same stable releases as that fix used the same
Fixes tag, so it's really not an issue.
next prev parent reply other threads:[~2020-05-28 15:55 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-28 14:51 [PATCH][net-next] nexthop: fix incorrect allocation failure on nhg->spare Colin King
2020-05-28 14:53 ` Nikolay Aleksandrov
2020-05-28 14:55 ` David Ahern
2020-05-28 14:55 ` Nikolay Aleksandrov
2020-05-28 15:53 ` Colin Ian King
2020-05-28 15:55 ` Nikolay Aleksandrov [this message]
2020-05-28 15:56 ` Colin Ian King
2020-05-30 0:15 ` David Miller
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