[syzbot] [dri?] [virtualization?] upstream boot error: INFO: task hung in drm_atomic_get_plane_state (2)

[syzbot <syzbot+7e3df8432b2f284f38dc@syzkaller.appspotmail.com>]

Hello,

syzbot found the following issue on:

HEAD commit:    a39b6ac3781d Linux 6.7-rc5
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15277d6ce80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=b6602324d4e5a4a9
dashboard link: https://syzkaller.appspot.com/bug?extid=7e3df8432b2f284f38dc
compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-a39b6ac3.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/87b10cd1584b/vmlinux-a39b6ac3.xz
kernel image: https://storage.googleapis.com/syzbot-assets/15b2b9a9ed4f/bzImage-a39b6ac3.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7e3df8432b2f284f38dc@syzkaller.appspotmail.com

INFO: task swapper/0:1 blocked for more than 143 seconds.
      Not tainted 6.7.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:swapper/0       state:D stack:22160 pid:1     tgid:1     ppid:0      flags:0x00004000
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6778
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __ww_mutex_lock.constprop.0+0xf57/0x2660 kernel/locking/mutex.c:754
 ww_mutex_lock+0x37/0x140 kernel/locking/mutex.c:871
 modeset_lock+0x484/0x6c0 drivers/gpu/drm/drm_modeset_lock.c:314
 drm_modeset_lock drivers/gpu/drm/drm_modeset_lock.c:396 [inline]
 drm_modeset_lock+0x59/0x90 drivers/gpu/drm/drm_modeset_lock.c:392
 drm_atomic_get_plane_state+0x199/0x580 drivers/gpu/drm/drm_atomic.c:544
 drm_client_modeset_commit_atomic+0x246/0x810 drivers/gpu/drm/drm_client_modeset.c:1003
 drm_client_modeset_commit_locked+0x14d/0x580 drivers/gpu/drm/drm_client_modeset.c:1154
 pan_display_atomic drivers/gpu/drm/drm_fb_helper.c:1370 [inline]
 drm_fb_helper_pan_display+0x2a5/0x990 drivers/gpu/drm/drm_fb_helper.c:1430
 fb_pan_display+0x477/0x7c0 drivers/video/fbdev/core/fbmem.c:191
 bit_update_start+0x49/0x1f0 drivers/video/fbdev/core/bitblit.c:390
 fbcon_switch+0xbb3/0x12e0 drivers/video/fbdev/core/fbcon.c:2170
 redraw_screen+0x2bd/0x750 drivers/tty/vt/vt.c:969
 con2fb_init_display drivers/video/fbdev/core/fbcon.c:808 [inline]
 set_con2fb_map+0x793/0x1050 drivers/video/fbdev/core/fbcon.c:867
 do_fb_registered drivers/video/fbdev/core/fbcon.c:3007 [inline]
 fbcon_fb_registered+0x21d/0x660 drivers/video/fbdev/core/fbcon.c:3023
 do_register_framebuffer drivers/video/fbdev/core/fbmem.c:449 [inline]
 register_framebuffer+0x4b2/0x860 drivers/video/fbdev/core/fbmem.c:515
 __drm_fb_helper_initial_config_and_unlock+0xd7c/0x1600 drivers/gpu/drm/drm_fb_helper.c:1871
 drm_fb_helper_initial_config drivers/gpu/drm/drm_fb_helper.c:1936 [inline]
 drm_fb_helper_initial_config+0x44/0x60 drivers/gpu/drm/drm_fb_helper.c:1928
 drm_fbdev_generic_client_hotplug+0x1a7/0x270 drivers/gpu/drm/drm_fbdev_generic.c:279
 drm_client_register+0x195/0x280 drivers/gpu/drm/drm_client.c:149
 drm_fbdev_generic_setup+0x11c/0x330 drivers/gpu/drm/drm_fbdev_generic.c:341
 virtio_gpu_probe+0x1be/0x3c0 drivers/gpu/drm/virtio/virtgpu_drv.c:105
 virtio_dev_probe+0x56e/0x870 drivers/virtio/virtio.c:305
 call_driver_probe drivers/base/dd.c:579 [inline]
 really_probe+0x234/0xc90 drivers/base/dd.c:658
 __driver_probe_device+0x1de/0x4b0 drivers/base/dd.c:800
 driver_probe_device+0x4c/0x1a0 drivers/base/dd.c:830
 __driver_attach+0x274/0x570 drivers/base/dd.c:1216
 bus_for_each_dev+0x13c/0x1d0 drivers/base/bus.c:368
 bus_add_driver+0x2e9/0x630 drivers/base/bus.c:673
 driver_register+0x15c/0x4a0 drivers/base/driver.c:246
 do_one_initcall+0x11c/0x650 init/main.c:1236
 do_initcall_level init/main.c:1298 [inline]
 do_initcalls init/main.c:1314 [inline]
 do_basic_setup init/main.c:1333 [inline]
 kernel_init_freeable+0x687/0xc10 init/main.c:1551
 kernel_init+0x1c/0x2a0 init/main.c:1441
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
INFO: task kworker/0:0:7 blocked for more than 143 seconds.
      Not tainted 6.7.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/0:0     state:D stack:28704 pid:7     tgid:7     ppid:2      flags:0x00004000
Workqueue: events virtio_gpu_dequeue_ctrl_func
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6778
 schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6835
 __mutex_lock_common kernel/locking/mutex.c:679 [inline]
 __mutex_lock+0x5b9/0x9d0 kernel/locking/mutex.c:747
 drm_client_dev_hotplug drivers/gpu/drm/drm_client.c:227 [inline]
 drm_client_dev_hotplug+0x169/0x3c0 drivers/gpu/drm/drm_client.c:214
 virtio_gpu_cmd_get_display_info_cb+0x3e0/0x550 drivers/gpu/drm/virtio/virtgpu_vq.c:674
 virtio_gpu_dequeue_ctrl_func+0x21b/0x9a0 drivers/gpu/drm/virtio/virtgpu_vq.c:235
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627
 process_scheduled_works kernel/workqueue.c:2700 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>
INFO: task kworker/2:1:36 blocked for more than 143 seconds.
      Not tainted 6.7.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:kworker/2:1     state:D stack:26720 pid:36    tgid:36    ppid:2      flags:0x00004000
Workqueue: events drm_fb_helper_damage_work
Call Trace:
 <TASK>
 context_switch kernel/sched/core.c:5376 [inline]
 __schedule+0xedb/0x5af0 kernel/sched/core.c:6688
 __schedule_loop kernel/sched/core.c:6763 [inline]
 schedule+0xe9/0x270 kernel/sched/core.c:6778
 virtio_gpu_queue_ctrl_sgs drivers/gpu/drm/virtio/virtgpu_vq.c:341 [inline]
 virtio_gpu_queue_fenced_ctrl_buffer+0x497/0xff0 drivers/gpu/drm/virtio/virtgpu_vq.c:415
 virtio_gpu_resource_flush drivers/gpu/drm/virtio/virtgpu_plane.c:152 [inline]
 virtio_gpu_primary_plane_update+0x1059/0x1590 drivers/gpu/drm/virtio/virtgpu_plane.c:227
 drm_atomic_helper_commit_planes+0x92f/0xfe0 drivers/gpu/drm/drm_atomic_helper.c:2798
 drm_atomic_helper_commit_tail+0x69/0xf0 drivers/gpu/drm/drm_atomic_helper.c:1747
 commit_tail+0x353/0x410 drivers/gpu/drm/drm_atomic_helper.c:1832
 drm_atomic_helper_commit+0x2f9/0x380 drivers/gpu/drm/drm_atomic_helper.c:2070
 drm_atomic_commit+0x20b/0x2d0 drivers/gpu/drm/drm_atomic.c:1513
 drm_atomic_helper_dirtyfb+0x611/0x7b0 drivers/gpu/drm/drm_damage_helper.c:181
 drm_fbdev_generic_helper_fb_dirty+0x827/0xbb0 drivers/gpu/drm/drm_fbdev_generic.c:230
 drm_fb_helper_fb_dirty drivers/gpu/drm/drm_fb_helper.c:390 [inline]
 drm_fb_helper_damage_work+0x283/0x5e0 drivers/gpu/drm/drm_fb_helper.c:413
 process_one_work+0x886/0x15d0 kernel/workqueue.c:2627
 process_scheduled_works kernel/workqueue.c:2700 [inline]
 worker_thread+0x8b9/0x1290 kernel/workqueue.c:2781
 kthread+0x2c6/0x3a0 kernel/kthread.c:388
 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
 </TASK>

Showing all locks held in the system:
9 locks held by swapper/0/1:
 #0: ffff888102fd6170 (&dev->mutex){....}-{3:3}, at: device_lock include/linux/device.h:992 [inline]
 #0: ffff888102fd6170 (&dev->mutex){....}-{3:3}, at: __device_driver_lock drivers/base/dd.c:1095 [inline]
 #0: ffff888102fd6170 (&dev->mutex){....}-{3:3}, at: __driver_attach+0x269/0x570 drivers/base/dd.c:1215
 #1: ffff8881067782f8 (&dev->clientlist_mutex){+.+.}-{3:3}, at: drm_client_register+0x54/0x280 drivers/gpu/drm/drm_client.c:135
 #2: ffffffff8dab0f68 (registration_lock){+.+.}-{3:3}, at: register_framebuffer+0x7a/0x860 drivers/video/fbdev/core/fbmem.c:514
 #3: ffffffff8cf958c0 (console_lock){+.+.}-{0:0}, at: fbcon_fb_registered+0x3c/0x660 drivers/video/fbdev/core/fbcon.c:3019
 #4: ffff888106bb2a80 (&helper->lock){+.+.}-{3:3}, at: drm_fb_helper_pan_display+0xd5/0x990 drivers/gpu/drm/drm_fb_helper.c:1423
 #5: ffff8881067781b0 (&dev->master_mutex){+.+.}-{3:3}, at: drm_master_internal_acquire+0x21/0x70 drivers/gpu/drm/drm_auth.c:458
 #6: ffff888106bb2898 (&client->modeset_mutex){+.+.}-{3:3}, at: drm_client_modeset_commit_locked+0x4c/0x580 drivers/gpu/drm/drm_client_modeset.c:1152
 #7: ffffc90000267328 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_client_modeset_commit_atomic+0xd0/0x810 drivers/gpu/drm/drm_client_modeset.c:990
 #8: ffff88801d5538b0 (crtc_ww_class_mutex){+.+.}-{3:3}, at: modeset_lock+0x484/0x6c0 drivers/gpu/drm/drm_modeset_lock.c:314
3 locks held by kworker/0:0/7:
 #0: ffff888013069d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2602
 #1: ffffc900002c7d80 ((work_completion)(&vgvq->dequeue_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2603
 #2: ffff8881067782f8 (&dev->clientlist_mutex){+.+.}-{3:3}, at: drm_client_dev_hotplug drivers/gpu/drm/drm_client.c:227 [inline]
 #2: ffff8881067782f8 (&dev->clientlist_mutex){+.+.}-{3:3}, at: drm_client_dev_hotplug+0x169/0x3c0 drivers/gpu/drm/drm_client.c:214
5 locks held by kworker/2:1/36:
 #0: ffff888013069d38 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2602
 #1: ffffc90000b27d80 ((work_completion)(&helper->damage_work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2603
 #2: ffffc90000b27a40 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_atomic_helper_dirtyfb+0xb5/0x7b0 drivers/gpu/drm/drm_damage_helper.c:123
 #3: ffff88801d5538b0 (crtc_ww_class_mutex){+.+.}-{3:3}, at: modeset_lock+0x484/0x6c0 drivers/gpu/drm/drm_modeset_lock.c:314
 #4: ffffffff8dbe7f90 (drm_unplug_srcu){.+.+}-{0:0}, at: srcu_lock_acquire include/linux/srcu.h:116 [inline]
 #4: ffffffff8dbe7f90 (drm_unplug_srcu){.+.+}-{0:0}, at: srcu_read_lock include/linux/srcu.h:215 [inline]
 #4: ffffffff8dbe7f90 (drm_unplug_srcu){.+.+}-{0:0}, at: drm_dev_enter+0x49/0x160 drivers/gpu/drm/drm_drv.c:450
1 lock held by khungtaskd/38:
 #0: ffffffff8cfa82e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:301 [inline]
 #0: ffffffff8cfa82e0 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:747 [inline]
 #0: ffffffff8cfa82e0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by kworker/u16:6/366:
 #0: ffff888013079938 ((wq_completion)events_unbound){+.+.}-{0:0}, at: process_one_work+0x789/0x15d0 kernel/workqueue.c:2602
 #1: ffffc90003377d80 ((work_completion)(&(&kfence_timer)->work)){+.+.}-{0:0}, at: process_one_work+0x7eb/0x15d0 kernel/workqueue.c:2603

=============================================



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