On Fri, Jul 21, 2023 at 04:51:01PM +0000, Thomas Backlund wrote:

Den 2023-07-21 kl. 19:05, skrev Greg Kroah-Hartman:

...

From: Christian König christian.koenig@amd.com

commit a2848d08742c8e8494675892c02c0d22acbe3cf8 upstream.

There is a small window where we have already incremented the pin count but not yet moved the bo from the lru to the pinned list.

Signed-off-by: Christian König christian.koenig@amd.com Reported-by: Pelloux-Prayer, Pierre-Eric Pierre-eric.Pelloux-prayer@amd.com Tested-by: Pelloux-Prayer, Pierre-Eric Pierre-eric.Pelloux-prayer@amd.com Acked-by: Alex Deucher alexander.deucher@amd.com Cc: stable@vger.kernel.org Link: https://patchwork.freedesktop.org/patch/msgid/20230707120826.3701-1-christia... Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

---

drivers/gpu/drm/ttm/ttm_bo.c | 6 ++++++ 1 file changed, 6 insertions(+)

--- a/drivers/gpu/drm/ttm/ttm_bo.c +++ b/drivers/gpu/drm/ttm/ttm_bo.c @@ -517,6 +517,12 @@ static bool ttm_bo_evict_swapout_allowab { bool ret = false;

• if (bo->pin_count) {

• *locked = false;
  

• *busy = false;
  

• return false;
  

• }
• if (bo->base.resv == ctx->resv) { dma_resv_assert_held(bo->base.resv); if (ctx->allow_res_evict)

This one will trigger GPF and needs a follow-up fix that is not upstream yet: https://patchwork.freedesktop.org/patch/547897/

as reported on LKML in thread: [bug/bisected] commit a2848d08742c8e8494675892c02c0d22acbe3cf8 cause general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI

Thanks for letting me know, I've dropped this from the queues now. Please let us know when we should add it back.

greg k-h