rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P12888/1:b..l rcu: (detected by 1, t=10503 jiffies, g=42697, q=752 ncpus=2) task:syz.0.2058 state:R running task stack:24776 pid:12888 tgid:12887 ppid:5862 task_flags:0x400140 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5357 [inline] __schedule+0x1798/0x4cc0 kernel/sched/core.c:6961 preempt_schedule_irq+0xb5/0x150 kernel/sched/core.c:7288 irqentry_exit+0x6f/0x90 kernel/entry/common.c:197 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:unwind_next_frame+0xc9c/0x2390 arch/x86/kernel/unwind_orc.c:-1 Code: 4c 8b 6c 24 50 4c 8b 64 24 10 74 08 48 89 df e8 1a 55 b0 00 4c 89 23 ba 10 00 00 00 4c 89 ef 31 f6 e8 e8 56 b0 00 48 8b 14 24 c5 04 00 00 4c 89 7c 24 28 48 89 5c 24 78 4d 8d 66 08 4d 89 e5 RSP: 0018:ffffc9001b63eaf8 EFLAGS: 00000246 RAX: ffffc9001b63ec18 RBX: ffffc9001b63ec00 RCX: 0000000000000000 RDX: ffffffff903b5c8e RSI: 0000000000000000 RDI: ffffc9001b63ec28 RBP: dffffc0000000000 R08: ffffc9001b63ec27 R09: 0000000000000000 R10: ffffc9001b63ec18 R11: fffff520036c7d85 R12: ffffc9001b63f538 R13: ffffc9001b63ec18 R14: ffffc9001b63ebc8 R15: ffffc9001b63ec10 arch_stack_walk+0x11c/0x150 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x9c/0xe0 kernel/stacktrace.c:122 save_stack+0xf5/0x1f0 mm/page_owner.c:156 __reset_page_owner+0x71/0x1f0 mm/page_owner.c:308 reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1395 [inline] __free_frozen_pages+0xbc4/0xd30 mm/page_alloc.c:2895 discard_slab mm/slub.c:2758 [inline] __put_partials+0x156/0x1a0 mm/slub.c:3223 put_cpu_partial+0x17c/0x250 mm/slub.c:3298 __slab_free+0x2d5/0x3c0 mm/slub.c:4565 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x140 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:340 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4191 [inline] slab_alloc_node mm/slub.c:4240 [inline] __do_kmalloc_node mm/slub.c:4375 [inline] __kmalloc_node_track_caller_noprof+0x216/0x4e0 mm/slub.c:4395 __do_krealloc mm/slub.c:4957 [inline] krealloc_noprof+0x124/0x340 mm/slub.c:5010 push_jmp_history+0x1cc/0x6f0 kernel/bpf/verifier.c:3984 do_check+0x52cb/0xe520 kernel/bpf/verifier.c:20049 do_check_common+0x1949/0x24f0 kernel/bpf/verifier.c:23264 do_check_main kernel/bpf/verifier.c:23347 [inline] bpf_check+0x1746a/0x1d2d0 kernel/bpf/verifier.c:24707 bpf_prog_load+0x1318/0x1930 kernel/bpf/syscall.c:2979 __sys_bpf+0x528/0x870 kernel/bpf/syscall.c:6029 __do_sys_bpf kernel/bpf/syscall.c:6139 [inline] __se_sys_bpf kernel/bpf/syscall.c:6137 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:6137 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xfa/0x3b0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f0c1b98eba9 RSP: 002b:00007f0c1c7c8038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f0c1bbd5fa0 RCX: 00007f0c1b98eba9 RDX: 0000000000000048 RSI: 000020000000e000 RDI: 0000000000000005 RBP: 00007f0c1ba11e19 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f0c1bbd6038 R14: 00007f0c1bbd5fa0 R15: 00007ffebc06b908