This is a note to let you know that I've just added the patch titled
usbip: usbip_host: fix to hold parent lock for device_attach() calls
to my usb git tree which can be found at git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git in the usb-linus branch.
The patch will show up in the next release of the linux-next tree (usually sometime within the next 24 hours during the week.)
The patch will hopefully also be merged in Linus's tree for the next -rc kernel release.
If you have any questions about this process, please let me know.
From 4bfb141bc01312a817d36627cc47c93f801c216d Mon Sep 17 00:00:00 2001
From: Shuah Khan shuahkh@osg.samsung.com Date: Thu, 5 Apr 2018 16:29:04 -0600 Subject: usbip: usbip_host: fix to hold parent lock for device_attach() calls
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 --- drivers/usb/usbip/stub_main.c | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/drivers/usb/usbip/stub_main.c b/drivers/usb/usbip/stub_main.c index c31c8402a0c5..d41d0cdeec0f 100644 --- a/drivers/usb/usbip/stub_main.c +++ b/drivers/usb/usbip/stub_main.c @@ -186,7 +186,12 @@ 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;