On Mon, Oct 28, 2019 at 3:08 PM Robin Murphy <robin.murphy@xxxxxxx> wrote: > > It seems that killing an application while faults are occurring > (particularly with a GPU in FPGA at a whopping 40MHz) can lead to > handling a lingering page fault after all the address space contexts > have already been freed. In this situation, the LRU list is empty so > addr_to_drm_mm_node() ends up dereferencing the list head as if it were > a struct panfrost_mmu entry; this leaves "mmu->as" actually pointing at > the pfdev->alloc_mask bitmap, which is also empty, and given that the > fault has a high likelihood of being in AS0, hilarity ensues. > > Sadly, the cleanest solution seems to involve another goto. Oh well, at > least it's robust... > > Signed-off-by: Robin Murphy <robin.murphy@xxxxxxx> > --- > drivers/gpu/drm/panfrost/panfrost_mmu.c | 6 +++--- > 1 file changed, 3 insertions(+), 3 deletions(-) Applied to drm-misc-fixes Rob _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
