On Saturday 05 June 2021 23:34:23 Ondrej Zary wrote:
On Saturday 05 June 2021 21:43:52 Ondrej Zary wrote:
Hello, I'm testing 5.13.0-rc4 and nouveau crashes with NULL pointer dereference in nouveau_bo_sync_for_device. Found various reports like this but that was back in februaryso that should be fixed now.
So it is the same bug. Broken since 5.11. This revert fixes it in 5.11: https://lists.freedesktop.org/archives/dri-devel/2021-February/298531.html
Added some debug printks to nouveau_bo_sync_for_device: [ 22.225048] ttm_dma=fc33b500 [ 22.225066] ttm_dma->num_pages=18 [ 22.225071] i=0 num_pages=16 [ 22.225077] ttm_dma->dma_address=00000000 [ 22.225094] BUG: kernel NULL pointer dereference, address: 00000000
So ttm->dma_address is NULL.
Tested reverting f295c8cfec833c2707ff1512da10d65386dde7af again and it does not work... Not sure what I did before.
Bisecting between 5.10 and 5.11 is impossible - I keep hitting neverending stream of bugs. As always with nouveau...