mirror of https://gitee.com/openkylin/linux.git
f70744c687
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...
Fixes:
|
||
|---|---|---|
| .. | ||
| Kconfig | ||
| Makefile | ||
| TODO | ||
| panfrost_devfreq.c | ||
| panfrost_devfreq.h | ||
| panfrost_device.c | ||
| panfrost_device.h | ||
| panfrost_drv.c | ||
| panfrost_features.h | ||
| panfrost_gem.c | ||
| panfrost_gem.h | ||
| panfrost_gem_shrinker.c | ||
| panfrost_gpu.c | ||
| panfrost_gpu.h | ||
| panfrost_issues.h | ||
| panfrost_job.c | ||
| panfrost_job.h | ||
| panfrost_mmu.c | ||
| panfrost_mmu.h | ||
| panfrost_perfcnt.c | ||
| panfrost_perfcnt.h | ||
| panfrost_regs.h | ||