rcu: INFO: rcu_preempt detected stalls on CPUs/tasks: rcu: Tasks blocked on level-0 rcu_node (CPUs 0-1): P7821/1:b..l (detected by 1, t=10504 jiffies, g=22805, q=1543) task:syz.1.958 state:R running task stack:27056 pid: 7821 ppid: 4191 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5049 [inline] __schedule+0x11c3/0x4350 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:bpf_long_memcpy include/linux/bpf.h:1739 [inline] RIP: 0010:bpf_percpu_array_update+0x4ef/0x700 kernel/bpf/arraymap.c:369 Code: c1 e8 03 80 3c 18 00 74 05 e8 7d f7 2d 00 4e 8b 7c 35 38 4b 8d 7c 34 38 48 89 f8 48 c1 e8 03 80 3c 18 00 74 05 e8 e1 f7 2d 00 <4f> 89 7c 34 38 45 85 ed 74 12 e8 d2 d8 e8 ff 49 83 c6 40 41 83 c5 RSP: 0018:ffffc9000349fb48 EFLAGS: 00000246 RAX: 1ffffd1ffff97859 RBX: dffffc0000000000 RCX: 0000000000080000 RDX: ffffc90005919000 RSI: 000000000001bb4e RDI: ffffe8ffffcbc2c8 RBP: ffff888060a84020 R08: dffffc0000000000 R09: 1ffffffff203d218 R10: dffffc0000000000 R11: fffffbfff203d219 R12: ffffe8ffffcbc110 R13: 0000000000000078 R14: 0000000000000180 R15: 0000000000000000 bpf_map_update_value+0x23c/0x650 kernel/bpf/syscall.c:200 generic_map_update_batch+0x52c/0x7d0 kernel/bpf/syscall.c:1430 bpf_map_do_batch+0x475/0x5f0 kernel/bpf/syscall.c:-1 __sys_bpf+0x671/0x6f0 kernel/bpf/syscall.c:-1 __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: 0033:0x7fb3f5e46e99 RSP: 002b:00007fb3f409f028 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007fb3f60cefa0 RCX: 00007fb3f5e46e99 RDX: 0000000000000038 RSI: 0000200000000200 RDI: 000000000000001a RBP: 00007fb3f5edceaf R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb3f60cf038 R14: 00007fb3f60cefa0 R15: 00007ffe127e3348