Messages in this thread | | | Date | Wed, 27 Aug 2014 17:25:12 +0300 | From | Mathias Nyman <> | Subject | Re: [PATCH] xhci-ring: Fix Null pointer dereference |
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On 08/26/2014 06:47 PM, Ricardo Ribalda Delgado wrote: > While testing a usb gadget I managed to crash completely the host > computer. This was due to a NULL pointer derefence. > > This patch avoids the crash although the kernel still outputs some > warnings. > > Without this patch, kernels from (at least) 3.14 can be crashed with > mass storage gadgets. > > Affected host: NEC Corporation uPD720200 USB 3.0 >
This should not be necessary anymore after commit 365038d83313951d6ace15342eb24624bbef1666 xhci: rework cycle bit checking for new dequeue pointers
http://marc.info/?l=linux-usb&m=140844993115671&w=2
Which was just added to Greg's usb-linus branch. It checks that the new_deq_ptr and new_deq_seg are valid before calling xhci_queue_new_dequeue_state()
-Mathias
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