linux-kernel - Re: [syzbot] [bluetooth?] general protection fault in __timer_delete

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Message-ID: <20250208115825.2077-1-hdanton@sina.com>
Date: Sat,  8 Feb 2025 19:58:23 +0800
From: Hillf Danton <hdanton@...a.com>
To: syzbot <syzbot+1eaee1ec18b9d18ca3b8@...kaller.appspotmail.com>
Cc: linux-kernel@...r.kernel.org,
	syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [bluetooth?] general protection fault in __timer_delete_sync

On Fri, 07 Feb 2025 12:16:20 -0800
> syzbot found the following issue on:
> 
> HEAD commit:    808eb958781e Add linux-next specific files for 20250206
> git tree:       linux-next
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1043a4a4580000

#syz test

--- x/drivers/bluetooth/hci_ldisc.c
+++ y/drivers/bluetooth/hci_ldisc.c
@@ -711,6 +711,7 @@ static int hci_uart_set_proto(struct hci
 
 	err = hci_uart_register_dev(hu);
 	if (err) {
+		clear_bit(HCI_UART_PROTO_READY, &hu->flags);
 		return err;
 	}
 
--