Christian König 26401a4999 drm/exec: don't immediately add prelocked obj to array of locked objs ... When a contention is detected the drm_exec object grabs a reference to the contended object, unlocks all other objects and pre-locks the contended one before anything else. The problem is that it is possible that this pre-locked object was about to be destroyed and drm_exec is now holding the last reference to it. So we never actually see this pre-locked object again to be explicitly locked and so also never reserve a slot for a dma_fence object on it. Should the driver now use drm_exec_for_each_locked_object() to add a new fence to all locked objects we eventually see a warning or even a BUG_ON() to prevent random memory corruption. Fix this by keeping the prelocked object out of the array of locked objs until it was explicitly mentioned by the driver again. If the prelocked object is never mentioned again by the driver just unlock and drop the reference at the end of the locking loop. Signed-off-by: Christian König <christian.koenig@amd.com> Reported-by: Vitaly Prosyak <vitaly.prosyak@amd.com> Reviewed-by: Vitaly Prosyak <vitaly.prosyak@amd.com> Tested-by: Vitaly Prosyak <vitaly.prosyak@amd.com> Fixes: 09593216bf ("drm: execution context for GEM buffers v7") CC: stable@vger.kernel.org # v6.6+ Link: https://lore.kernel.org/r/20261007124657.9664-1-christian.koenig@amd.com		2026-10-14 13:57:14 +02:00
..
amd
bridge	drm/bridge: analogix_dp: Add support for RK3576	2026-06-02 22:09:03 +02:00
clients
display	Merge tag 'drm-intel-next-2026-07-28' of https://gitlab.freedesktop.org/drm/i915/kernel into drm-next	2026-08-01 06:05:01 +10:00
intel	UAPI Changes:	2026-07-07 15:19:56 +10:00
ttm	Linux 7.2	2026-08-20 10:58:44 +10:00
amd_asic_type.h
drm_accel.h
drm_atomic_helper.h	drm/atomic-helper: Add HDMI bridge output bus formats helper	2026-06-09 21:03:50 +01:00
drm_atomic_state_helper.h	drm/atomic-state-helper: Remove drm_atomic_helper_bridge_reset()	2026-06-22 11:24:57 +02:00
drm_atomic_uapi.h	drm/atomic: track individual colorop updates	2026-06-10 07:13:36 -03:00
drm_atomic.h	drm/atomic: Expand atomic_create_state expectations for drm_private_obj	2026-05-29 11:41:49 +02:00
drm_audio_component.h
drm_auth.h
drm_blend.h	drm: Rename struct drm_atomic_state to drm_atomic_commit	2026-05-04 14:05:04 +10:00
drm_bridge_connector.h
drm_bridge_helper.h
drm_bridge.h	drm/bridge: Replace outdated forward declaration	2026-07-27 13:30:09 +02:00
drm_buddy.h	gpu: Move DRM buddy allocator one level up (part two)	2026-02-06 11:38:35 +10:00
drm_cache.h
drm_client_event.h	drm/client: Pass force parameter to client restore	2025-11-25 08:43:46 +01:00
drm_client.h	drm/client: Export drm_client_buffer_create()	2026-03-03 09:28:31 +01:00
drm_color_mgmt.h	drm: Add helper to extract lut from struct drm_color_lut32	2025-11-26 23:03:35 +01:00
drm_colorop.h	drm-misc-next for 7.3:	2026-07-06 17:38:49 +10:00
drm_connector.h	drm/connector: Fix epoch_counter docs to reflect reality	2026-07-21 17:06:42 +01:00
drm_crtc_helper.h	drm: Rename struct drm_atomic_state to drm_atomic_commit	2026-05-04 14:05:04 +10:00
drm_crtc.h	drm/crtc: Add new atomic_create_state callback	2026-05-29 11:41:53 +02:00
drm_damage_helper.h	drm: Rename struct drm_atomic_state to drm_atomic_commit	2026-05-04 14:05:04 +10:00
drm_debugfs_crc.h	drm/crc: Fix typo in doc for drm_crtc_crc	2026-05-04 14:26:53 +02:00
drm_debugfs.h	drm: Remove DRIVER_GEM_GPUVA feature flag	2026-05-29 19:03:10 +02:00
drm_device.h	drm/gem: Make the GEM LRU lock part of drm_device	2026-05-18 15:16:47 +02:00
drm_drv.h	cgroup/dmem: Introduce struct dmem_cgroup_init for region initialization	2026-08-06 23:37:56 +02:00
drm_dumb_buffers.h	drm/dumb-buffers: Provide helper to set pitch and size	2025-09-29 13:57:43 +02:00
drm_edid.h	Revert "drm/edid: add CTA Video Format Data Block support"	2026-05-06 11:22:15 +02:00
drm_eld.h
drm_encoder.h	drm/encoder: add mutex to protect the bridge chain	2026-04-16 09:08:42 +02:00
drm_exec.h	drm/exec: don't immediately add prelocked obj to array of locked objs	2026-10-14 13:57:14 +02:00
drm_fb_dma_helper.h
drm_fb_helper.h	drm/amdgpu: fix build for CONFIG_DRM_FBDEV_EMULATION=n	2026-04-28 15:43:04 -04:00
drm_fbdev_dma.h
drm_fbdev_shmem.h
drm_fbdev_ttm.h
drm_file.h	drm/syncobj: Convert syncobj idr to xarray	2025-12-18 09:05:30 +00:00
drm_fixed.h	drm/fixed: fix kernel-doc for drm_sm2fixp()	2026-06-30 12:31:20 +03:00
drm_flip_work.h
drm_format_helper.h	drm/format-helper: Remove drm_fb_blit()	2025-09-23 15:06:06 +02:00
drm_fourcc.h
drm_framebuffer.h
drm_gem_atomic_helper.h
drm_gem_dma_helper.h
drm_gem_framebuffer_helper.h
drm_gem_shmem_helper.h	Merge drm/drm-next into drm-misc-next	2026-06-30 10:16:00 +02:00
drm_gem_ttm_helper.h
drm_gem_vram_helper.h
drm_gem.h	drm: Remove DRIVER_GEM_GPUVA feature flag	2026-05-29 19:03:10 +02:00
drm_gpusvm.h	drm/gpusvm: let the drm_gpusvm core context purely MM level	2026-07-09 04:12:49 -07:00
drm_gpuvm.h	drm/gpuvm: Fix comment to reflect remap operation operand status	2026-07-03 23:32:55 +02:00
drm_ioctl.h
drm_kunit_helpers.h	drm: Rename struct drm_atomic_state to drm_atomic_commit	2026-05-04 14:05:04 +10:00
drm_lease.h
drm_managed.h	drm/managed: fix drmm_add_action() kernel-doc	2026-06-03 11:24:52 +02:00
drm_mipi_dbi.h	drm: Rename struct drm_atomic_state to drm_atomic_commit	2026-05-04 14:05:04 +10:00
drm_mipi_dsi.h	drm/mipi-dsi: add flag for sending all DSC slices in one packet	2026-06-07 02:31:01 +03:00
drm_mm.h	drm/mm: replace drm_print.h include with a forward declaration	2025-10-31 10:34:56 +02:00
drm_mode_config.h	drm/mode-config: Create drm_mode_config_create_initial_state()	2026-05-29 11:42:45 +02:00
drm_mode_object.h	drm/mode_object: add drm_object_immutable_property_get_value()	2026-01-14 02:18:31 +02:00
drm_modes.h	drm/modes: Add DRM_MODE_MATCH_TIMINGS_VRR	2026-06-24 18:54:10 +03:00
drm_modeset_helper_vtables.h	drm: Rename struct drm_atomic_state to drm_atomic_commit	2026-05-04 14:05:04 +10:00
drm_modeset_helper.h
drm_modeset_lock.h
drm_module.h
drm_of.h	drm/of: Implement drm_of_get_panel_orientation()	2026-07-08 13:44:40 +02:00
drm_pagemap_util.h	drm/pagemap_util: Add a utility to assign an owner to a set of interconnected gpus	2025-12-23 10:00:47 +01:00
drm_pagemap.h	drm/pagemap: Prevent double migration of device pages	2026-08-31 14:56:03 -07:00
drm_panel.h	drm/panel: Use drm_of_get_panel_orientation()	2026-07-08 13:54:58 +02:00
drm_panic.h
drm_pciids.h
drm_plane_helper.h
drm_plane.h	drm/plane: Add new atomic_create_state callback	2026-05-29 11:41:52 +02:00
drm_prime.h
drm_print.h	drm/print: describe 6th & 9th bit of drm.debug	2026-06-03 11:24:52 +02:00
drm_privacy_screen_consumer.h
drm_privacy_screen_driver.h
drm_privacy_screen_machine.h
drm_probe_helper.h
drm_property.h	drm/atomic: add max_size check to drm_property_replace_blob_from_id()	2026-01-14 02:18:31 +02:00
drm_ras_genl_family.h	drm/ras: Introduce the DRM RAS infrastructure over generic netlink	2026-03-05 19:38:55 -05:00
drm_ras.h	drm/ras: include linux/types.h in drm_ras.h	2026-06-30 15:51:24 +03:00
drm_rect.h
drm_self_refresh_helper.h	drm: Rename struct drm_atomic_state to drm_atomic_commit	2026-05-04 14:05:04 +10:00
drm_simple_kms_helper.h	drm/simple-kms: Deprecate simple-kms helpers	2026-03-25 15:05:22 +01:00
drm_suballoc.h	drm/sa: Split drm_suballoc_new() into SA alloc and init helpers	2026-02-20 10:54:02 -08:00
drm_syncobj.h
drm_sysfs.h
drm_util.h
drm_utils.h	drm/amd/display: Force PWM backlight on Lenovo Legion 5 15ARH05	2026-07-17 17:41:15 -04:00
drm_vblank_helper.h	drm: Rename struct drm_atomic_state to drm_atomic_commit	2026-05-04 14:05:04 +10:00
drm_vblank_work.h
drm_vblank.h	drm/vblank: add return value to drm_crtc_wait_one_vblank()	2025-12-11 16:55:36 +02:00
drm_vma_manager.h
drm_writeback.h
gpu_scheduler.h	Linux 7.2	2026-08-20 10:58:44 +10:00
gud.h
Makefile	kbuild: Let kernel-doc.py use PYTHON3 override	2025-11-08 19:42:22 -07:00
spsc_queue.h
task_barrier.h