Am Mittwoch, 25. April 2012, 11:56:57 schrieb James Woodcock: > Hi, > > I have got a USB HID device which I am talking to with ioctls > HIDIOCSFEATURE and HIDIOCGFEATURE on Linux 3.3.3, and I think I have > discovered a memory leak. > > When I call ioctl(fd, HIDIOCGFEATURE...), a long series of things > happens in the kernel that eventually causes hidraw_report_event() to be > called to let the user space program know there is data to be retrieved > by read(). hidraw_report_event() calls kmemdup() to create a copy of > the data to be returned. However, I'm never going to call read() > because > the data is returned by the ioctl() call. > > So, I think that the main bug I have spotted is that if the user calls > ioctl(fd, HIODCGFEATURE...), hidraw_report_event() should not be called. > I'm not really familiar with the code, so I'm not sure what the best fix > would be. Please post the full call chain you see. Regards Oliver -- To unsubscribe from this list: send the line "unsubscribe linux-input" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
