On Fri, 12 Aug 2016, Binyamin Sharet wrote: > Hi, > > I'm using GadgetFs for USB host fuzzing (using umap2), > and part of the fuzzing session is to send invalid descriptors at > various stages. > > However, some requests are not delegated to user-land (see gadgetfs_setup() > in gadget/legacy/inode.c), > Specifically - GET_DESCRIPTOR (device/configuration) and SET_CONFIGURATION. > > Does a patch to switch the gadgetfs module to "delegate all" sounds reasonable? > If so - what's the preferred way to do it? I have a few options in mind: Why do you need to delegate Get-Descriptor? The contents of the response are entirely dictated by the descriptors provided by the user program in the first place. Set-Configuration _is_ delegated to the user program, although the program is not allowed to fail the request. Is that what you want to do? > - module parameter > - write some command to the ep0 file > - send an ioctl to the ep0 file > > Any other suggestion? I suspect this sort of thing would not be accepted. If Felipe agrees, you might as well just keep your changes out-of-tree. Alan Stern -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
