rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-...!: (1 GPs behind) idle=b46/1/0x4000000000000004 softirq=214004/214006 fqs=37 rcu: (t=10500 jiffies g=285169 q=488) rcu: rcu_preempt kthread starved for 10424 jiffies! g285169 f0x0 RCU_GP_WAIT_FQS(5) ->state=0x0 ->cpu=0 rcu: RCU grace-period kthread stack dump: rcu_preempt R running task 29136 10 2 0x80000000 Call Trace: schedule+0x8d/0x1b0 kernel/sched/core.c:3559 schedule_timeout+0x4d1/0xf20 kernel/time/timer.c:1806 rcu_gp_kthread+0xcee/0x2060 kernel/rcu/tree.c:2202 kthread+0x34a/0x420 kernel/kthread.c:246 ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:415 NMI backtrace for cpu 1 CPU: 1 PID: 23826 Comm: syz-executor.4 Not tainted 4.19.120-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x188/0x20d lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x63/0xa2 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1a6/0x1eb lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x170/0x1bb kernel/rcu/tree.c:1340 print_cpu_stall kernel/rcu/tree.c:1478 [inline] check_cpu_stall kernel/rcu/tree.c:1550 [inline] __rcu_pending kernel/rcu/tree.c:3293 [inline] rcu_pending kernel/rcu/tree.c:3336 [inline] rcu_check_callbacks.cold+0x634/0xddc kernel/rcu/tree.c:2682 update_process_times+0x2a/0x70 kernel/time/timer.c:1638 tick_sched_handle+0x9b/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0x42/0x130 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x2fc/0xd50 kernel/time/hrtimer.c:1463 hrtimer_interrupt+0x312/0x770 kernel/time/hrtimer.c:1521 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1067 [inline] smp_apic_timer_interrupt+0x10c/0x550 arch/x86/kernel/apic/apic.c:1092 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:prandom_u32+0x0/0xb0 lib/random32.c:80 Code: fd ff ff 48 89 ef e8 0f fd ff ff 48 89 ef e8 07 fd ff ff 48 89 ef e8 ff fc ff ff 48 89 ef 5d e9 f6 fc ff ff 66 0f 1f 44 00 00 <41> 54 53 48 83 ec 08 e8 84 df 13 fe bf 01 00 00 00 e8 9a e0 f2 fd RSP: 0018:ffff8880ae707d18 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000014 RBX: ffff8880941a1980 RCX: ffffffff8158014d RDX: 0000000000000100 RSI: ffffffff81580176 RDI: 0000000000000005 RBP: 0000000000000014 R08: ffff888090e5a200 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880ae707d70 R13: 1ffff11015ce0faa R14: 0000000000000000 R15: ffff8880a672d550 garp_join_timer_arm+0x21/0x80 net/802/garp.c:400 call_timer_fn+0x177/0x700 kernel/time/timer.c:1326 expire_timers kernel/time/timer.c:1363 [inline] __run_timers kernel/time/timer.c:1684 [inline] __run_timers kernel/time/timer.c:1652 [inline] run_timer_softirq+0x5d0/0x1540 kernel/time/timer.c:1697 __do_softirq+0x26c/0x93c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:372 [inline] irq_exit+0x17b/0x1c0 kernel/softirq.c:412 exiting_irq arch/x86/include/asm/apic.h:544 [inline] smp_apic_timer_interrupt+0x136/0x550 arch/x86/kernel/apic/apic.c:1094 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:893 RIP: 0010:__write_once_size include/linux/compiler.h:220 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x44/0x50 kernel/kcov.c:109 Code: 75 2b 8b 90 d8 12 00 00 83 fa 02 75 20 48 8b 88 e0 12 00 00 8b 80 dc 12 00 00 48 8b 11 48 83 c2 01 48 39 d0 76 07 48 89 34 d1 <48> 89 11 c3 0f 1f 84 00 00 00 00 00 65 4c 8b 04 25 40 ee 01 00 65 RSP: 0018:ffff88806cd6f9b8 EFLAGS: 00000216 ORIG_RAX: ffffffffffffff13 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc9000e2e8000 RDX: 0000000000000b36 RSI: ffffffff81723f4d RDI: 0000000000000001 RBP: 000000000045c829 R08: ffff888090e5a200 R09: ffffed1015ce4733 R10: ffffed1015ce4732 R11: ffff8880ae723993 R12: 0000000000000000 R13: 0000000000000000 R14: ffff888090e5a200 R15: ffff88809092473f rcu_read_unlock include/linux/rcupdate.h:677 [inline] is_bpf_text_address+0xdd/0x160 kernel/bpf/core.c:547 kernel_text_address+0x6e/0xe0 kernel/extable.c:152 __kernel_text_address+0x9/0x30 kernel/extable.c:107 unwind_get_return_address arch/x86/kernel/unwind_orc.c:300 [inline] unwind_get_return_address+0x5a/0xa0 arch/x86/kernel/unwind_orc.c:295 __save_stack_trace+0x8a/0xf0 arch/x86/kernel/stacktrace.c:45 save_stack+0x32/0xa0 mm/kasan/kasan.c:448 set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc mm/kasan/kasan.c:553 [inline] kasan_kmalloc+0xbf/0xe0 mm/kasan/kasan.c:531 kmem_cache_alloc_trace+0x14d/0x7a0 mm/slab.c:3625 kmalloc include/linux/slab.h:515 [inline] sock_alloc_inode+0x5f/0x250 net/socket.c:247 alloc_inode+0x5d/0x180 fs/inode.c:211 new_inode_pseudo+0x14/0xe0 fs/inode.c:911 sock_alloc+0x3c/0x260 net/socket.c:547 __sock_create+0xba/0x740 net/socket.c:1240 sock_create net/socket.c:1316 [inline] __sys_socket+0xef/0x200 net/socket.c:1346 __do_sys_socket net/socket.c:1355 [inline] __se_sys_socket net/socket.c:1353 [inline] __x64_sys_socket+0x6f/0xb0 net/socket.c:1353 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c829 Code: 0d b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 db b6 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ff811f67c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 0000000000506760 RCX: 000000000045c829 RDX: 0000000000000000 RSI: 0000000000000803 RDI: 0000000000000001 RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000b6e R14: 00000000004cda30 R15: 00007ff811f686d4 systemd[1]: systemd-journald.service: Main process exited, code=killed, status=6/ABRT systemd[1]: systemd-journald.service: Unit entered failed state. systemd[1]: systemd-journald.service: Failed with result 'watchdog'. systemd[1]: systemd-journald.service: Service has no hold-off time, scheduling restart. systemd[1]: Stopped Flush Journal to Persistent Storage. systemd[1]: Stopping Flush Journal to Persistent Storage... systemd[1]: Stopped Journal Service. systemd[1]: systemd-journald.service: Failed to create cgroup /system.slice/systemd-journald.service: No such file or directory systemd[1]: Starting Journal Service... systemd[1]: syzcgroup-unified.mount: Failed to create cgroup /system.slice/syzcgroup-unified.mount: No such file or directory