linux-kernel - [PATCH net-next] ipv4: igmp: Remove redundant comparison in igmp_mcf_get

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Message-ID: <20230912084039.1501984-1-Ilia.Gavrilov@infotecs.ru>
Date:   Tue, 12 Sep 2023 08:42:34 +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] ipv4: igmp: Remove redundant comparison in
 igmp_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.

Signed-off-by: Gavrilov Ilia <Ilia.Gavrilov@...otecs.ru>
---
Repost according to https://lore.kernel.org/all/fea6db56-3a01-b7c8-b800-a6c885e99feb@kernel.org/
 net/ipv4/igmp.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/net/ipv4/igmp.c b/net/ipv4/igmp.c
index 418e5fb58fd3..76c3ea75b8dd 100644
--- a/net/ipv4/igmp.c
+++ b/net/ipv4/igmp.c
@@ -2944,8 +2944,6 @@ static struct ip_sf_list *igmp_mcf_get_next(struct seq_file *seq, struct ip_sf_l
 				continue;
 			state->im = rcu_dereference(state->idev->mc_list);
 		}
-		if (!state->im)
-			break;
 		spin_lock_bh(&state->im->lock);
 		psf = state->im->sources;
 	}
-- 
2.39.2