netdev - Testing for netrom: fix KASAN slab-use-after-free in nr_dec

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Message-Id: <20260117065313.32506-1-activprithvi@gmail.com>
Date: Sat, 17 Jan 2026 12:23:13 +0530
From: Prithvi Tambewagh <activprithvi@...il.com>
To: syzbot+df52f4216bf7b4d768e7@...kaller.appspotmail.com,
	davem@...emloft.net,
	edumazet@...gle.com,
	horms@...nel.org,
	kuba@...nel.org,
	pabeni@...hat.com
Cc: linux-hams@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org,
	syzkaller-bugs@...glegroups.com,
	Prithvi Tambewagh <activprithvi@...il.com>
Subject: Testing for netrom: fix KASAN slab-use-after-free in nr_dec_obs()

#syz test upstream be548645527a131a097fdc884b7fca40c8b86231

Signed-off-by: Prithvi Tambewagh <activprithvi@...il.com>
---
 net/netrom/nr_route.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/net/netrom/nr_route.c b/net/netrom/nr_route.c
index b94cb2ffbaf8..788e375537fe 100644
--- a/net/netrom/nr_route.c
+++ b/net/netrom/nr_route.c
@@ -466,7 +466,6 @@ static int nr_dec_obs(void)
 				nr_neigh = s->routes[i].neighbour;
 
 				nr_neigh->count--;
-				nr_neigh_put(nr_neigh);
 
 				if (nr_neigh->count == 0 && !nr_neigh->locked)
 					nr_remove_neigh(nr_neigh);

base-commit: be548645527a131a097fdc884b7fca40c8b86231
-- 
2.34.1