Thanks! Just a copy&paste issue.
Patch to fix this is on the mailing list.
Christian.
Am 25.03.21 um 16:00 schrieb Colin Ian King:
Hi,
Static analysis with Coverity in linux-next has detected an issue in drivers/gpu/drm/ttm/ttm_bo.c with the follow commit:
commit a1f091f8ef2b680a5184db065527612247cb4cae Author: Christian König christian.koenig@amd.com Date: Tue Oct 6 17:26:42 2020 +0200
drm/ttm: switch to per device LRU lock Instead of having a global lock for potentially less contention.The analysis is as follows:
617 int ttm_mem_evict_first(struct ttm_device *bdev, 618 struct ttm_resource_manager *man, 619 const struct ttm_place *place, 620 struct ttm_operation_ctx *ctx, 621 struct ww_acquire_ctx *ticket) 622 { 1. assign_zero: Assigning: bo = NULL.
623 struct ttm_buffer_object *bo = NULL, *busy_bo = NULL; 624 bool locked = false; 625 unsigned i; 626 int ret; 627
Explicit null dereferenced (FORWARD_NULL)2. var_deref_op:Dereferencing null pointer bo.
628 spin_lock(&bo->bdev->lru_lock); 629 for (i = 0; i < TTM_MAX_BO_PRIORITY; ++i) {
The spin_lock on bo is dereferencing a null bo pointer.
Colin