rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=c8f/1/0x4000000000000000 softirq=187774/187776 fqs=5205 (t=10502 jiffies g=362305 q=2785) NMI backtrace for cpu 0 CPU: 0 PID: 1953 Comm: syz-executor.0 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x25e/0x3f0 kernel/rcu/tree_stall.h:343 print_cpu_stall kernel/rcu/tree_stall.h:627 [inline] check_cpu_stall kernel/rcu/tree_stall.h:711 [inline] rcu_pending kernel/rcu/tree.c:3878 [inline] rcu_sched_clock_irq.cold+0x9d/0x746 kernel/rcu/tree.c:2597 update_process_times+0x16d/0x200 kernel/time/timer.c:1785 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:226 tick_sched_timer+0x1b0/0x2d0 kernel/time/tick-sched.c:1421 __run_hrtimer kernel/time/hrtimer.c:1685 [inline] __hrtimer_run_queues+0x1c0/0xe50 kernel/time/hrtimer.c:1749 hrtimer_interrupt+0x31c/0x790 kernel/time/hrtimer.c:1811 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline] __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103 sysvec_apic_timer_interrupt+0x8e/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:check_heap_object mm/usercopy.c:228 [inline] RIP: 0010:__check_object_size mm/usercopy.c:286 [inline] RIP: 0010:__check_object_size+0xb1/0x3f0 mm/usercopy.c:256 Code: 35 cb b0 ff 48 89 de 4c 89 e7 e8 ba fd ff ff 48 c7 c6 c0 65 99 89 48 63 f8 49 89 fe e8 38 c3 b0 ff 45 85 f6 0f 85 e4 00 00 00 0a cb b0 ff 4c 89 e7 e8 92 22 6e ff 31 ff 41 89 c6 89 c6 e8 36 RSP: 0018:ffffc90002dafb30 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000007 RCX: 0000000000000003 RDX: 0000000000000000 RSI: ffff888079e30000 RDI: 0000000000000003 RBP: ffff88807cf10877 R08: ffffffff899965c0 R09: ffffffff81c6a778 R10: 0000000000000003 R11: 0000000000000000 R12: ffff88807cf10870 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880278fb000 check_object_size include/linux/thread_info.h:185 [inline] check_copy_size include/linux/thread_info.h:218 [inline] copy_from_user include/linux/uaccess.h:191 [inline] generic_map_update_batch+0x32a/0x5b0 kernel/bpf/syscall.c:1391 bpf_map_do_batch+0x3d5/0x510 kernel/bpf/syscall.c:4207 __sys_bpf+0x2751/0x5f00 kernel/bpf/syscall.c:4682 __do_sys_bpf kernel/bpf/syscall.c:4722 [inline] __se_sys_bpf kernel/bpf/syscall.c:4720 [inline] __x64_sys_bpf+0x75/0xb0 kernel/bpf/syscall.c:4720 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f4a215a8ae9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4a1eafd188 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f4a216bc020 RCX: 00007f4a215a8ae9 RDX: 0000000000000038 RSI: 0000000020000100 RDI: 000000000000001a RBP: 00007f4a21602f6d R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffca438b6f R14: 00007f4a1eafd300 R15: 0000000000022000 ---------------- Code disassembly (best guess): 0: 35 cb b0 ff 48 xor $0x48ffb0cb,%eax 5: 89 de mov %ebx,%esi 7: 4c 89 e7 mov %r12,%rdi a: e8 ba fd ff ff callq 0xfffffdc9 f: 48 c7 c6 c0 65 99 89 mov $0xffffffff899965c0,%rsi 16: 48 63 f8 movslq %eax,%rdi 19: 49 89 fe mov %rdi,%r14 1c: e8 38 c3 b0 ff callq 0xffb0c359 21: 45 85 f6 test %r14d,%r14d 24: 0f 85 e4 00 00 00 jne 0x10e * 2a: e8 0a cb b0 ff callq 0xffb0cb39 <-- trapping instruction 2f: 4c 89 e7 mov %r12,%rdi 32: e8 92 22 6e ff callq 0xff6e22c9 37: 31 ff xor %edi,%edi 39: 41 89 c6 mov %eax,%r14d 3c: 89 c6 mov %eax,%esi 3e: e8 .byte 0xe8 3f: 36 ss