rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7261/1:b..l rcu: (detected by 1, t=10504 jiffies, g=22721, q=47616 ncpus=2) task:syz.3.435 state:R running task stack:25832 pid:7261 ppid:5774 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5381 [inline] __schedule+0x14d2/0x44d0 kernel/sched/core.c:6700 preempt_schedule_irq+0xb5/0x140 kernel/sched/core.c:7010 irqentry_exit+0x67/0x70 kernel/entry/common.c:438 asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687 RIP: 0010:check_region_inline mm/kasan/generic.c:172 [inline] RIP: 0010:kasan_check_range+0x29/0x290 mm/kasan/generic.c:187 Code: cc 66 0f 1f 00 b0 01 48 85 f6 0f 84 b8 01 00 00 55 41 57 41 56 41 55 41 54 53 4c 8d 04 37 49 39 f8 0f 82 5a 02 00 00 49 89 f9 <49> c1 e9 2f 41 81 f9 ff ff 01 00 0f 82 46 02 00 00 49 89 ff 49 c1 RSP: 0018:ffffc90018d9fa40 EFLAGS: 00000202 RAX: ffffffff889e8e01 RBX: 1ffff920031b3f6d RCX: ffffffff889e8f14 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffff88801b3d0000 RBP: 0000000000000000 R08: ffff88801b3d0008 R09: ffff88801b3d0000 R10: dffffc0000000000 R11: ffffed100367a001 R12: ffff88801b3d0000 R13: 1ffff1100367a000 R14: ffffc90018d9fb68 R15: ffffc90018d9fb6c instrument_atomic_read include/linux/instrumented.h:68 [inline] _test_bit include/asm-generic/bitops/instrumented-non-atomic.h:141 [inline] test_ti_thread_flag include/linux/thread_info.h:118 [inline] test_tsk_thread_flag include/linux/sched.h:2066 [inline] task_sigpending include/linux/sched/signal.h:389 [inline] signal_pending include/linux/sched/signal.h:401 [inline] bpf_test_timer_continue+0xc4/0x380 net/bpf/test_run.c:74 bpf_test_run+0x3e6/0x850 net/bpf/test_run.c:426 bpf_prog_test_run_skb+0xa67/0x11c0 net/bpf/test_run.c:1050 bpf_prog_test_run+0x321/0x390 kernel/bpf/syscall.c:4132 __sys_bpf+0x440/0x800 kernel/bpf/syscall.c:5494 __do_sys_bpf kernel/bpf/syscall.c:5580 [inline] __se_sys_bpf kernel/bpf/syscall.c:5578 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5578 do_syscall_x64 arch/x86/entry/common.c:46 [inline] do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:76 entry_SYSCALL_64_after_hwframe+0x68/0xd2 RIP: 0033:0x7fc8a338f749 RSP: 002b:00007fc8a417d038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fc8a35e6090 RCX: 00007fc8a338f749 RDX: 0000000000000050 RSI: 0000200000000080 RDI: 000000000000000a RBP: 00007fc8a3413f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fc8a35e6128 R14: 00007fc8a35e6090 R15: 00007ffdbf5d1968