rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P5225/1:b..l (detected by 1, t=10502 jiffies, g=11249, q=2054) task:syz.4.321 state:R running task stack:24784 pid: 5225 ppid: 4196 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11ef/0x43c0 kernel/sched/core.c:6395 preempt_schedule_irq+0xbb/0x160 kernel/sched/core.c:6799 irqentry_exit+0x63/0x70 kernel/entry/common.c:432 asm_sysvec_apic_timer_interrupt+0x16/0x20 arch/x86/include/asm/idtentry.h:676 RIP: 0010:check_region_inline mm/kasan/generic.c:169 [inline] RIP: 0010:kasan_check_range+0x12/0x290 mm/kasan/generic.c:189 Code: ff ff ff c3 0f 0b b8 ea ff ff ff c3 00 00 cc cc 00 00 cc cc 00 00 cc cc b0 01 48 85 f6 0f 84 ac 01 00 00 55 41 57 41 56 41 54 <53> 49 89 f8 49 01 f0 0f 82 0e 02 00 00 49 89 f8 49 c1 e8 2f 41 81 RSP: 0018:ffffc9000313fa38 EFLAGS: 00000202 RAX: ffffffff881e0701 RBX: 1ffff92000627f69 RCX: ffffffff881e0792 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88802c7ad940 RBP: 0000000000000000 R08: ffff88802c7ad947 R09: 1ffff110058f5b28 R10: dffffc0000000000 R11: ffffed10058f5b29 R12: ffff88802c7ad940 R13: 1ffff110058f5b28 R14: ffffc9000313fb48 R15: ffffc9000313fb4c instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] test_ti_thread_flag include/linux/thread_info.h:118 [inline] need_resched include/linux/sched.h:2111 [inline] bpf_test_timer_continue+0x102/0x380 net/bpf/test_run.c:73 bpf_test_run+0x3a7/0x800 net/bpf/test_run.c:120 bpf_prog_test_run_xdp+0x3ed/0x920 net/bpf/test_run.c:812 bpf_prog_test_run+0x31e/0x390 kernel/bpf/syscall.c:3374 __sys_bpf+0x5a5/0x6f0 kernel/bpf/syscall.c:4675 __do_sys_bpf kernel/bpf/syscall.c:4761 [inline] __se_sys_bpf kernel/bpf/syscall.c:4759 [inline] __x64_sys_bpf+0x78/0x90 kernel/bpf/syscall.c:4759 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x66/0xd0 RIP: 0033:0x7f5824041eb9 RSP: 002b:00007f582229d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f58242bcfa0 RCX: 00007f5824041eb9 RDX: 0000000000000050 RSI: 0000200000000900 RDI: 000000000000000a RBP: 00007f58240afc1f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f58242bd038 R14: 00007f58242bcfa0 R15: 00007ffd5fa6d1e8