In the Linux kernel, the following vulnerability has been resolved: mmc: meson-gx: fix return value check of mmcaddhost() mmcaddhost() may return error, if we ignore its return value, it will lead two issues: 1. The memory that allocated in mmcallochost() is leaked. 2. In the remove() path, mmcremovehost() will be called to delete device, but it's not added yet, it will lead a kernel crash because of null-ptr-deref in devicedel(). Fix this by checking the return value and goto error path which will call mmcfree_host().