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commit ef61eb43ada6c1d6b94668f0f514e4c268093ff3 upstream. The syzkaller USB fuzzer found a general-protection-fault bug in the yurex driver. The fault occurs when a device has been unplugged; the driver's interrupt-URB handler logs an error message referring to the device by name, after the device has been unregistered and its name deallocated. This problem is caused by the fact that the interrupt URB isn't cancelled until the driver's private data structure is released, which can happen long after the device is gone. The cure is to make sure that the interrupt URB is killed before yurex_disconnect() returns; this is exactly the sort of thing that usb_poison_urb() was meant for. Signed-off-by: Alan Stern <stern@rowland.harvard.edu> Reported-and-tested-by: syzbot+2eb9121678bdb36e6d57@syzkaller.appspotmail.com CC: <stable@vger.kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Linux kernel ============ This file was moved to Documentation/admin-guide/README.rst Please notice that there are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. In order to build the documentation, use ``make htmldocs`` or ``make pdfdocs``. There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation. See Documentation/00-INDEX for a list of what is contained in each file. Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.