* [PATCH net] ipv6: mcast: Remove redundant comparison in igmp6_mcf_get_next()
@ 2023-08-28 11:18 Gavrilov Ilia
2023-08-29 2:44 ` David Ahern
0 siblings, 1 reply; 3+ messages in thread
From: Gavrilov Ilia @ 2023-08-28 11:18 UTC (permalink / raw)
To: David S. Miller
Cc: David Ahern, Eric Dumazet, Jakub Kicinski, Paolo Abeni, netdev,
linux-kernel, lvc-project
The 'state->im' value will always be non-zero after
the 'while' statement, so the check can be removed.
Found by InfoTeCS on behalf of Linux Verification Center
(linuxtesting.org) with SVACE.
Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
Signed-off-by: Gavrilov Ilia <Ilia.Gavrilov@infotecs.ru>
---
net/ipv6/mcast.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 714cdc9e2b8e..9696343d0aa9 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -3013,8 +3013,6 @@ static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_s
continue;
state->im = rcu_dereference(state->idev->mc_list);
}
- if (!state->im)
- break;
psf = rcu_dereference(state->im->mca_sources);
}
out:
--
2.39.2
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH net] ipv6: mcast: Remove redundant comparison in igmp6_mcf_get_next()
2023-08-28 11:18 [PATCH net] ipv6: mcast: Remove redundant comparison in igmp6_mcf_get_next() Gavrilov Ilia
@ 2023-08-29 2:44 ` David Ahern
2023-08-29 6:55 ` Gavrilov Ilia
0 siblings, 1 reply; 3+ messages in thread
From: David Ahern @ 2023-08-29 2:44 UTC (permalink / raw)
To: Gavrilov Ilia, David S. Miller
Cc: Eric Dumazet, Jakub Kicinski, Paolo Abeni, netdev, linux-kernel,
lvc-project
On 8/28/23 5:18 AM, Gavrilov Ilia wrote:
> The 'state->im' value will always be non-zero after
> the 'while' statement, so the check can be removed.
>
> Found by InfoTeCS on behalf of Linux Verification Center
> (linuxtesting.org) with SVACE.
>
> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
> Signed-off-by: Gavrilov Ilia <Ilia.Gavrilov@infotecs.ru>
> ---
> net/ipv6/mcast.c | 2 --
> 1 file changed, 2 deletions(-)
>
> diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
> index 714cdc9e2b8e..9696343d0aa9 100644
> --- a/net/ipv6/mcast.c
> +++ b/net/ipv6/mcast.c
> @@ -3013,8 +3013,6 @@ static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_s
> continue;
> state->im = rcu_dereference(state->idev->mc_list);
> }
> - if (!state->im)
> - break;
> psf = rcu_dereference(state->im->mca_sources);
> }
> out:
agree the check is not needed, but I also believe it does not need to be
backported. Since net-next is closed, resubmit after 9/11.
--
pw-bot: defer
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH net] ipv6: mcast: Remove redundant comparison in igmp6_mcf_get_next()
2023-08-29 2:44 ` David Ahern
@ 2023-08-29 6:55 ` Gavrilov Ilia
0 siblings, 0 replies; 3+ messages in thread
From: Gavrilov Ilia @ 2023-08-29 6:55 UTC (permalink / raw)
To: David Ahern, David S. Miller
Cc: Eric Dumazet, Jakub Kicinski, Paolo Abeni, netdev, linux-kernel,
lvc-project
On 8/29/23 05:44, David Ahern wrote:
> On 8/28/23 5:18 AM, Gavrilov Ilia wrote:
>> The 'state->im' value will always be non-zero after
>> the 'while' statement, so the check can be removed.
>>
>> Found by InfoTeCS on behalf of Linux Verification Center
>> (linuxtesting.org) with SVACE.
>>
>> Fixes: 1da177e4c3f4 ("Linux-2.6.12-rc2")
>> Signed-off-by: Gavrilov Ilia <Ilia.Gavrilov@infotecs.ru>
>> ---
>> net/ipv6/mcast.c | 2 --
>> 1 file changed, 2 deletions(-)
>>
>> diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
>> index 714cdc9e2b8e..9696343d0aa9 100644
>> --- a/net/ipv6/mcast.c
>> +++ b/net/ipv6/mcast.c
>> @@ -3013,8 +3013,6 @@ static struct ip6_sf_list *igmp6_mcf_get_next(struct seq_file *seq, struct ip6_s
>> continue;
>> state->im = rcu_dereference(state->idev->mc_list);
>> }
>> - if (!state->im)
>> - break;
>> psf = rcu_dereference(state->im->mca_sources);
>> }
>> out:
>
> agree the check is not needed, but I also believe it does not need to be
> backported. Since net-next is closed, resubmit after 9/11.
>
> --
> pw-bot: defer
I'll resend it after 9/11.
Thank you for the review!
^ permalink raw reply [flat|nested] 3+ messages in thread
end of thread, other threads:[~2023-08-29 6:56 UTC | newest]
Thread overview: 3+ messages (download: mbox.gz / follow: Atom feed)
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2023-08-28 11:18 [PATCH net] ipv6: mcast: Remove redundant comparison in igmp6_mcf_get_next() Gavrilov Ilia
2023-08-29 2:44 ` David Ahern
2023-08-29 6:55 ` Gavrilov Ilia
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