From 0e234632e39bd21dd28ffc9ba3ae8eec4deb949c Mon Sep 17 00:00:00 2001 From: Lucas De Marchi Date: Tue, 18 Nov 2025 11:08:11 -0800 Subject: [PATCH] drm/xe/guc: Fix stack_depot usage Add missing stack_depot_init() call when CONFIG_DRM_XE_DEBUG_GUC is enabled to fix the following call stack: [] BUG: kernel NULL pointer dereference, address: 0000000000000000 [] Workqueue: drm_sched_run_job_work [gpu_sched] [] RIP: 0010:stack_depot_save_flags+0x172/0x870 [] Call Trace: [] [] fast_req_track+0x58/0xb0 [xe] Fixes: 16b7e65d299d ("drm/xe/guc: Track FAST_REQ H2Gs to report where errors came from") Tested-by: Sagar Ghuge Cc: stable@vger.kernel.org # v6.17+ Reviewed-by: Stuart Summers Link: https://patch.msgid.link/20251118-fix-debug-guc-v1-1-9f780c6bedf8@intel.com Signed-off-by: Lucas De Marchi (cherry picked from commit 64fdf496a6929a0a194387d2bb5efaf5da2b542f) Signed-off-by: Lucas De Marchi --- drivers/gpu/drm/xe/xe_guc_ct.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/xe/xe_guc_ct.c b/drivers/gpu/drm/xe/xe_guc_ct.c index 7b008afb2a8f4..b7afe8e983cb7 100644 --- a/drivers/gpu/drm/xe/xe_guc_ct.c +++ b/drivers/gpu/drm/xe/xe_guc_ct.c @@ -243,6 +243,9 @@ int xe_guc_ct_init_noalloc(struct xe_guc_ct *ct) #if IS_ENABLED(CONFIG_DRM_XE_DEBUG) spin_lock_init(&ct->dead.lock); INIT_WORK(&ct->dead.worker, ct_dead_worker_func); +#if IS_ENABLED(CONFIG_DRM_XE_DEBUG_GUC) + stack_depot_init(); +#endif #endif init_waitqueue_head(&ct->wq); init_waitqueue_head(&ct->g2h_fence_wq); -- 2.47.3