Re: [PATCH] s390: cmf: fix use-after-free in enable_cmf

On Fri, 20 Nov 2020 15:48:50 +0800 Qinglang Miao wrote: > kfree(cdev) is called in put_device in the error branch. So that > device_unlock(&cdev->dev) would raise a use-after-free bug. In fact, > there's no need to call device_unlock after put_device. > > Fix it by adding simply return after put

[PATCH] s390: cmf: fix use-after-free in enable_cmf

kfree(cdev) is called in put_device in the error branch. So that device_unlock(&cdev->dev) would raise a use-after-free bug. In fact, there's no need to call device_unlock after put_device. Fix it by adding simply return after put_device. Fixes: a6ef15652d26 ("s390/cio: fix use after free in cmb