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Bluetooth: Fix not cleanup led when bt_init fails

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[ Upstream commit 2f3957c7eb4e07df944169a3e50a4d6790e1c744 ]

bt_init() calls bt_leds_init() to register led, but if it fails later,
bt_leds_cleanup() is not called to unregister it.

This can cause panic if the argument "bluetooth-power" in text is freed
and then another led_trigger_register() tries to access it:

BUG: unable to handle page fault for address: ffffffffc06d3bc0
RIP: 0010:strcmp+0xc/0x30
  Call Trace:
    <TASK>
    led_trigger_register+0x10d/0x4f0
    led_trigger_register_simple+0x7d/0x100
    bt_init+0x39/0xf7 [bluetooth]
    do_one_initcall+0xd0/0x4e0

Fixes: e64c97b53b ("Bluetooth: Add combined LED trigger for controller power")
Signed-off-by: Chen Zhongjin <chenzhongjin@huawei.com>
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Chen Zhongjin 2022-11-29 17:25:56 +08:00 committed by Greg Kroah-Hartman
parent 07ea5d74fc
commit 2c6cf0afc3
1 changed files with 3 additions and 1 deletions
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4
net/bluetooth/af_bluetooth.c
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@ -735,7 +735,7 @@ static int __init bt_init(void)
err = bt_sysfs_init();
if (err < 0)
return err;
goto cleanup_led;
err = sock_register(&bt_sock_family_ops);
if (err)
@ -771,6 +771,8 @@ unregister_socket:
sock_unregister(PF_BLUETOOTH);
cleanup_sysfs:
bt_sysfs_cleanup();
cleanup_led:
bt_leds_cleanup();
return err;
}