Messages in this thread Patch in this message | | | Date | Fri, 18 Nov 2005 23:38:43 -0500 | From | Dmitry Torokhov <> | Subject | [patch 3/3] Uinput: dont use "interruptible" in FF code |
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Input: uinput - don't use "interruptible" in FF code
If thread that submitted FF request gets interrupted somehow it will release request structure and ioctl handler will work with freed memory. TO prevent that from happening switch to using wait_for_completion instead of wait_for_completion_interruptible.
Signed-off-by: Dmitry Torokhov <dtor@mail.ru> ---
drivers/input/misc/uinput.c | 11 +++-------- 1 files changed, 3 insertions(+), 8 deletions(-)
Index: work/drivers/input/misc/uinput.c =================================================================== --- work.orig/drivers/input/misc/uinput.c +++ work/drivers/input/misc/uinput.c @@ -92,24 +92,19 @@ static void uinput_request_done(struct u { /* Mark slot as available */ udev->requests[request->id] = NULL; - wake_up_interruptible(&udev->requests_waitq); + wake_up(&udev->requests_waitq); complete(&request->done); } static int uinput_request_submit(struct input_dev *dev, struct uinput_request *request) { - int retval; - /* Tell our userspace app about this new request by queueing an input event */ uinput_dev_event(dev, EV_UINPUT, request->code, request->id); /* Wait for the request to complete */ - retval = wait_for_completion_interruptible(&request->done); - if (!retval) - retval = request->retval; - - return retval; + wait_for_completion(&request->done); + return request->retval; } static int uinput_dev_upload_effect(struct input_dev *dev, struct ff_effect *effect) - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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