linux-kernel - Re: [syzbot] [bluetooth?] [wireless?] WARNING in free

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Message-ID: <20250118105454.1957-1-hdanton@sina.com>
Date: Sat, 18 Jan 2025 18:54:53 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+85ff1051228a04613a32@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bluetooth?] [wireless?] WARNING in free_netdev (2)

On Fri, 17 Jan 2025 14:44:19 -0800
> syzbot found the following issue on:
> 
> HEAD commit:    8d20dcda404d selftests: drv-net-hw: inject pp_alloc_fail e..
> git tree:       net-next
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=13ffc2b0580000

#syz test

--- x/net/core/dev.c
+++ y/net/core/dev.c
@@ -11606,8 +11606,6 @@ void free_netdev(struct net_device *dev)
 		return;
 	}
 
-	mutex_destroy(&dev->lock);
-
 	kfree(dev->ethtool);
 	netif_free_tx_queues(dev);
 	netif_free_rx_queues(dev);
--