linux-kernel - [PATCH net-next] ipv6: mcast: Remove redundant comparison in igmp6_mcf_get

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Message-ID: <20230912084100.1502379-1-Ilia.Gavrilov@infotecs.ru>
Date:   Tue, 12 Sep 2023 08:42:49 +0000
From:   Gavrilov Ilia <Ilia.Gavrilov@...otecs.ru>
To:     "David S. Miller" <davem@...emloft.net>
CC:     David Ahern <dsahern@...nel.org>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "lvc-project@...uxtesting.org" <lvc-project@...uxtesting.org>
Subject: [PATCH net-next] ipv6: mcast: Remove redundant comparison in
  igmp6_mcf_get_next()

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@...otecs.ru>
---
Repost according to https://lore.kernel.org/all/cdc2183a-c79a-b4bd-2726-bd3a2d6d5440@kernel.org/
 net/ipv6/mcast.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/ipv6/mcast.c b/net/ipv6/mcast.c
index 5ce25bcb9974..421264a69e97 100644
--- a/net/ipv6/mcast.c
+++ b/net/ipv6/mcast.c
@@ -3011,8 +3011,6 @@ 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