BUG: MAX_LOCKDEP_ENTRIES too low!
turning off the locking correctness validator.
CPU: 1 PID: 9510 Comm: kworker/1:5 Not tainted 5.12.0-rc8-syzkaller #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.14.0-2 04/01/2014
Workqueue: events drm_fb_helper_damage_work
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 alloc_list_entry kernel/locking/lockdep.c:1353 [inline]
 add_lock_to_list.constprop.0.cold+0x11/0x18 kernel/locking/lockdep.c:1374
 check_prev_add kernel/locking/lockdep.c:3007 [inline]
 check_prevs_add kernel/locking/lockdep.c:3060 [inline]
 validate_chain kernel/locking/lockdep.c:3675 [inline]
 __lock_acquire+0x2f37/0x54c0 kernel/locking/lockdep.c:4901
 lock_acquire kernel/locking/lockdep.c:5511 [inline]
 lock_acquire+0x1ab/0x740 kernel/locking/lockdep.c:5476
 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline]
 _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151
 rq_lock kernel/sched/sched.h:1321 [inline]
 __schedule+0x21c/0x21b0 kernel/sched/core.c:4990
 preempt_schedule_common+0x45/0xc0 kernel/sched/core.c:5233
 preempt_schedule_thunk+0x16/0x18 arch/x86/entry/thunk_64.S:35
 __mutex_lock_common kernel/locking/mutex.c:957 [inline]
 __mutex_lock+0xd38/0x1120 kernel/locking/mutex.c:1096
 drm_gem_shmem_get_pages+0x56/0x1b0 drivers/gpu/drm/drm_gem_shmem_helper.c:186
 drm_gem_shmem_vmap_locked drivers/gpu/drm/drm_gem_shmem_helper.c:286 [inline]
 drm_gem_shmem_vmap+0x304/0x5a0 drivers/gpu/drm/drm_gem_shmem_helper.c:342
 drm_gem_vmap+0x6b/0xe0 drivers/gpu/drm/drm_gem.c:1207
 drm_client_buffer_vmap+0x41/0xd0 drivers/gpu/drm/drm_client.c:325
 drm_fb_helper_damage_blit drivers/gpu/drm/drm_fb_helper.c:414 [inline]
 drm_fb_helper_damage_work+0x291/0xac0 drivers/gpu/drm/drm_fb_helper.c:450
 process_one_work+0x98d/0x1600 kernel/workqueue.c:2275
 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421
 kthread+0x3b1/0x4a0 kernel/kthread.c:292
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:294