6.17-stable review patch. If anyone has any objections, please let me know.
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From: Lucas De Marchi lucas.demarchi@intel.com
commit 0e234632e39bd21dd28ffc9ba3ae8eec4deb949c upstream.
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: [] <TASK> [] 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 sagar.ghuge@intel.com Cc: stable@vger.kernel.org # v6.17+ Reviewed-by: Stuart Summers stuart.summers@intel.com Link: https://patch.msgid.link/20251118-fix-debug-guc-v1-1-9f780c6bedf8@intel.com Signed-off-by: Lucas De Marchi lucas.demarchi@intel.com (cherry picked from commit 64fdf496a6929a0a194387d2bb5efaf5da2b542f) Signed-off-by: Lucas De Marchi lucas.demarchi@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- drivers/gpu/drm/xe/xe_guc_ct.c | 3 +++ 1 file changed, 3 insertions(+)
--- a/drivers/gpu/drm/xe/xe_guc_ct.c +++ b/drivers/gpu/drm/xe/xe_guc_ct.c @@ -237,6 +237,9 @@ int xe_guc_ct_init_noalloc(struct xe_guc #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);