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| author | Shuah Khan <shuahkh@osg.samsung.com> | 2018-04-05 16:29:04 -0600 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-05-01 15:13:04 -0700 |
| commit | 039cb1bb0b8904d3105150bb6908d05de7202111 (patch) | |
| tree | 18e4b17c847a309f5bdf241d31601284c24859ce /drivers/usb/usbip | |
| parent | 3bebadf9931e00901f62f45f5b73ee49989bec7f (diff) | |
| download | linux-stable-039cb1bb0b8904d3105150bb6908d05de7202111.tar.gz linux-stable-039cb1bb0b8904d3105150bb6908d05de7202111.tar.bz2 linux-stable-039cb1bb0b8904d3105150bb6908d05de7202111.zip | |
usbip: usbip_host: fix to hold parent lock for device_attach() calls
commit 4bfb141bc01312a817d36627cc47c93f801c216d upstream.
usbip_host calls device_attach() without holding dev->parent lock.
Fix it.
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Cc: stable <stable@vger.kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/usb/usbip')
| -rw-r--r-- | drivers/usb/usbip/stub_main.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/drivers/usb/usbip/stub_main.c b/drivers/usb/usbip/stub_main.c index 325b4c05acdd..f761e02e75c9 100644 --- a/drivers/usb/usbip/stub_main.c +++ b/drivers/usb/usbip/stub_main.c @@ -201,7 +201,12 @@ static ssize_t rebind_store(struct device_driver *dev, const char *buf, if (!bid) return -ENODEV; + /* device_attach() callers should hold parent lock for USB */ + if (bid->udev->dev.parent) + device_lock(bid->udev->dev.parent); ret = device_attach(&bid->udev->dev); + if (bid->udev->dev.parent) + device_unlock(bid->udev->dev.parent); if (ret < 0) { dev_err(&bid->udev->dev, "rebind failed\n"); return ret; |