rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P26308/1:b..l rcu: (detected by 1, t=10503 jiffies, g=324581, q=821516 ncpus=2) task:syz.0.8099 state:R running task stack:26040 pid:26308 tgid:26306 ppid:16370 task_flags:0x400040 flags:0x00080002 Call Trace: context_switch kernel/sched/core.c:5533 [inline] __schedule+0x17db/0x58f0 kernel/sched/core.c:7284 preempt_schedule_irq+0x4b/0x90 kernel/sched/core.c:7606 irqentry_exit_to_kernel_mode include/linux/irq-entry-common.h:539 [inline] irqentry_exit+0x14f/0x920 kernel/entry/common.c:167 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:674 RIP: 0010:lock_acquire+0x232/0x350 kernel/locking/lockdep.c:5947 Code: ff ff ff e8 30 3d 47 0a f7 44 24 10 00 02 00 00 0f 84 38 ff ff ff 65 48 8b 05 42 b7 f2 12 48 3b 44 24 50 75 33 fb 48 83 c4 58 <5b> 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc cc 48 8d 3d f7 f7 d9 RSP: 0018:ffffc9000619ed00 EFLAGS: 00000296 RAX: 09e8d6714a6e0500 RBX: 0000000000000000 RCX: 0000000000000046 RDX: 00000000105209fd RSI: ffffffff8e6e85e2 RDI: ffffffff8c6ddb80 RBP: ffff888028578000 R08: ffffffff817821df R09: 0000000000000000 R10: ffffc9000619ee38 R11: ffffffff81b2d5e0 R12: ffffffff8fd5c8e0 R13: 0000000000000002 R14: 0000000000000000 R15: 0000000000000246 rcu_lock_acquire include/linux/rcupdate.h:309 [inline] rcu_read_lock include/linux/rcupdate.h:849 [inline] class_rcu_constructor include/linux/rcupdate.h:1216 [inline] unwind_next_frame+0xac/0x2550 arch/x86/kernel/unwind_orc.c:495 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:183 __set_page_owner+0x8d/0x4c0 mm/page_owner.c:359 set_page_owner include/linux/page_owner.h:33 [inline] post_alloc_hook+0x1f9/0x250 mm/page_alloc.c:1871 prep_new_page mm/page_alloc.c:1879 [inline] get_page_from_freelist+0x2209/0x2280 mm/page_alloc.c:3943 __alloc_frozen_pages_noprof+0x217/0x5a0 mm/page_alloc.c:5436 __alloc_pages_noprof+0x10/0x100 mm/page_alloc.c:5471 alloc_pages_bulk_noprof+0x5fa/0x7c0 mm/page_alloc.c:5295 ___alloc_pages_bulk mm/kasan/shadow.c:345 [inline] __kasan_populate_vmalloc_do mm/kasan/shadow.c:370 [inline] __kasan_populate_vmalloc+0xb7/0x1c0 mm/kasan/shadow.c:424 kasan_populate_vmalloc include/linux/kasan.h:580 [inline] alloc_vmap_area+0xd1a/0x1420 mm/vmalloc.c:2145 __get_vm_area_node+0x200/0x2f0 mm/vmalloc.c:3248 __vmalloc_node_range_noprof+0x343/0x1540 mm/vmalloc.c:4064 __kvmalloc_node_noprof+0x5a1/0x820 mm/slub.c:7043 _kvmalloc_array_node_noprof include/linux/slab.h:1374 [inline] __htab_map_lookup_and_delete_batch+0x77c/0x1a30 kernel/bpf/hashtab.c:1866 bpf_map_do_batch+0x27f/0x630 kernel/bpf/syscall.c:5794 __sys_bpf+0xa9f/0xd90 kernel/bpf/syscall.c:-1 __do_sys_bpf kernel/bpf/syscall.c:6506 [inline] __se_sys_bpf kernel/bpf/syscall.c:6503 [inline] __x64_sys_bpf+0xba/0xd0 kernel/bpf/syscall.c:6503 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fdf5a19e559 RSP: 002b:00007fdf583d5028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fdf5a426090 RCX: 00007fdf5a19e559 RDX: 0000000000000038 RSI: 0000200000000080 RDI: 0000000000000018 RBP: 00007fdf5a235ab8 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fdf5a426128 R14: 00007fdf5a426090 R15: 00007ffce609f708