rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P3739/1:b..l rcu: (detected by 0, t=10503 jiffies, g=253417, q=2139 ncpus=2) task:syz.6.7600 state:R running task stack:25112 pid:3739 tgid:3739 ppid:2146 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5260 [inline] __schedule+0x1522/0x51d0 kernel/sched/core.c:6867 preempt_schedule_irq+0x4d/0xa0 kernel/sched/core.c:7194 irqentry_exit+0x597/0x620 kernel/entry/common.c:216 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:697 RIP: 0010:__read_once_word_nocheck+0x0/0x10 include/asm-generic/rwonce.h:67 Code: 66 09 b7 00 48 ba 00 00 00 00 00 fc ff df e9 88 fc ff ff 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <48> 8b 07 e9 d8 43 24 0a cc cc cc cc cc cc cc cc 90 90 90 90 90 90 RSP: 0018:ffffc90004ce7350 EFLAGS: 00000202 RAX: ffffc90004ce7c01 RBX: ffffc90004ce7c70 RCX: 1ffff9200099ce01 RDX: ffffffff90c438ce RSI: 0000000000000002 RDI: ffffc90004ce7c70 RBP: 1ffff9200099ce86 R08: 0000000000000007 R09: ffffffff8e55a360 R10: ffffc90004ce7478 R11: ffffffff81afb440 R12: ffffc90004ce8000 R13: 1ffff9200099ce87 R14: ffffc90004ce7428 R15: ffffc90004ce0000 deref_stack_reg arch/x86/kernel/unwind_orc.c:422 [inline] unwind_next_frame+0xe52/0x23c0 arch/x86/kernel/unwind_orc.c:600 arch_stack_walk+0x11b/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xa9/0x100 kernel/stacktrace.c:122 save_stack+0x122/0x230 mm/page_owner.c:165 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:320 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1433 [inline] __free_frozen_pages+0xbf8/0xd70 mm/page_alloc.c:2973 discard_slab mm/slub.c:3346 [inline] __put_partials+0x146/0x170 mm/slub.c:3886 __slab_free+0x294/0x320 mm/slub.c:5956 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_kmalloc+0x22/0xb0 mm/kasan/common.c:406 kasan_kmalloc include/linux/kasan.h:263 [inline] __kmalloc_cache_noprof+0x3d1/0x6e0 mm/slub.c:5780 kmalloc_noprof include/linux/slab.h:957 [inline] kzalloc_noprof include/linux/slab.h:1094 [inline] vkms_plane_duplicate_state+0x8d/0x110 drivers/gpu/drm/vkms/vkms_plane.c:63 drm_atomic_get_plane_state+0x25a/0x670 drivers/gpu/drm/drm_atomic.c:569 drm_client_modeset_commit_atomic+0x227/0x7e0 drivers/gpu/drm/drm_client_modeset.c:1055 drm_client_modeset_commit_locked+0xcb/0x4d0 drivers/gpu/drm/drm_client_modeset.c:1206 drm_client_modeset_commit+0x4a/0x70 drivers/gpu/drm/drm_client_modeset.c:1232 __drm_fb_helper_restore_fbdev_mode_unlocked+0x9c/0x1c0 drivers/gpu/drm/drm_fb_helper.c:235 drm_fbdev_client_restore+0x1b/0x30 drivers/gpu/drm/clients/drm_fbdev_client.c:45 drm_client_dev_restore+0x14c/0x290 drivers/gpu/drm/drm_client_event.c:118 drm_lastclose drivers/gpu/drm/drm_file.c:408 [inline] drm_release+0x31a/0x3f0 drivers/gpu/drm/drm_file.c:441 __fput+0x44f/0xa70 fs/file_table.c:468 task_work_run+0x1d9/0x270 kernel/task_work.c:233 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline] __exit_to_user_mode_loop kernel/entry/common.c:44 [inline] exit_to_user_mode_loop+0xed/0x480 kernel/entry/common.c:75 __exit_to_user_mode_prepare include/linux/irq-entry-common.h:226 [inline] syscall_exit_to_user_mode_prepare include/linux/irq-entry-common.h:256 [inline] syscall_exit_to_user_mode_work include/linux/entry-common.h:159 [inline] syscall_exit_to_user_mode include/linux/entry-common.h:194 [inline] do_syscall_64+0x2b7/0xf80 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb64af9aeb9 RSP: 002b:00007fb64b33fba8 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4 RAX: 0000000000000000 RBX: 00007fb64b217da0 RCX: 00007fb64af9aeb9 RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003 RBP: 00007fb64b217da0 R08: 0000000000000006 R09: 0000000000000000 R10: 00007fb64b217cb0 R11: 0000000000000246 R12: 0000000000209a64 R13: 00007fb64b21636c R14: 0000000000209a1a R15: 00007fb64b216360