rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=05a/1/0x4000000000000004 softirq=79495/79496 fqs=4642 (t=10500 jiffies g=105645 q=288205) NMI backtrace for cpu 0 CPU: 0 PID: 28086 Comm: syz-executor.4 Not tainted 5.7.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x1e9/0x30e lib/dump_stack.c:118 nmi_cpu_backtrace+0x9f/0x180 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x199/0x2a0 kernel/rcu/tree_stall.h:320 print_cpu_stall kernel/rcu/tree_stall.h:553 [inline] check_cpu_stall kernel/rcu/tree_stall.h:627 [inline] rcu_pending kernel/rcu/tree.c:3471 [inline] rcu_sched_clock_irq+0x1a3f/0x1fe0 kernel/rcu/tree.c:2486 update_process_times+0x12c/0x180 kernel/time/timer.c:1726 tick_sched_handle kernel/time/tick-sched.c:176 [inline] tick_sched_timer+0x254/0x410 kernel/time/tick-sched.c:1320 __run_hrtimer kernel/time/hrtimer.c:1520 [inline] __hrtimer_run_queues+0x42d/0x930 kernel/time/hrtimer.c:1584 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1646 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1080 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1105 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:91 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:134 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:165 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:183 [inline] RIP: 0010:check_memory_region+0x84/0x2f0 mm/kasan/generic.c:192 Code: 00 fc ff df 4d 01 ea 4d 89 d6 4d 29 ce 49 83 fe 10 7f 2d 4d 85 f6 0f 84 ab 01 00 00 4c 89 cb 4c 29 d3 0f 1f 40 00 45 0f b6 19 <45> 84 db 0f 85 f3 01 00 00 49 ff c1 48 ff c3 75 eb e9 87 01 00 00 RSP: 0018:ffffc90000007cc0 EFLAGS: 00000287 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: ffffffffffffffff RCX: ffffffff86ddb92a RDX: 0000000000000001 RSI: 0000000000000004 RDI: ffff888097340778 RBP: 1ffff11012e680fd R08: dffffc0000000000 R09: ffffed1012e680ef R10: ffffed1012e680f0 R11: 0000000000000000 R12: 1ffff11012e680ef R13: dffffc0000000001 R14: 0000000000000001 R15: ffff8880973407e8 atomic_fetch_sub include/asm-generic/atomic-instrumented.h:199 [inline] refcount_dec include/linux/refcount.h:309 [inline] __sock_put include/net/sock.h:698 [inline] inet_twsk_bind_unhash net/ipv4/inet_timewait_sock.c:40 [inline] inet_twsk_kill+0x44a/0x5a0 net/ipv4/inet_timewait_sock.c:59 call_timer_fn+0x91/0x160 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers+0x776/0x970 kernel/time/timer.c:1773 run_timer_softirq+0x46/0x80 kernel/time/timer.c:1786 __do_softirq+0x268/0x80c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x223/0x230 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:546 [inline] smp_apic_timer_interrupt+0x113/0x280 arch/x86/kernel/apic/apic.c:1107 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:is_vmalloc_addr+0x1/0x30 mm/vmalloc.c:46 Code: ff 48 8b 3c 24 e8 8f 87 f9 ff 0f 0b e8 f8 94 cb ff 4c 89 ff 48 c7 c6 1c e1 e5 88 e8 59 87 f9 ff 0f 0b cc cc cc cc cc cc cc 53 <48> 89 fb e8 d7 94 cb ff 48 89 d8 48 c1 e8 28 3d c8 ff ff 00 0f 97 RSP: 0018:ffffc90002147bc0 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffffffff819e9d49 RBX: ffff8880949cb700 RCX: ffff8880903c6040 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff8880949cb700 RBP: ffff8880553ca7e8 R08: ffffffff81a26836 R09: fffffbfff1262f75 R10: fffffbfff1262f75 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: dffffc0000000000 R15: ffff8880949cb700 kvfree+0x11/0x40 mm/util.c:600 memcg_destroy_list_lru_node mm/list_lru.c:380 [inline] memcg_destroy_list_lru mm/list_lru.c:469 [inline] list_lru_destroy+0x28d/0x390 mm/list_lru.c:640 deactivate_locked_super+0xb3/0xf0 fs/super.c:342 deactivate_super+0x168/0x210 fs/super.c:366 cleanup_mnt+0x432/0x4e0 fs/namespace.c:1121 mntput_no_expire+0xb67/0xca0 fs/namespace.c:1204 put_ipc_ns+0x4c/0x150 ipc/namespace.c:151 free_nsproxy+0xfa/0x3b0 kernel/nsproxy.c:200 do_exit+0x5ea/0x1f80 kernel/exit.c:805 do_group_exit+0x15e/0x2c0 kernel/exit.c:904 __do_sys_exit_group+0x13/0x20 kernel/exit.c:915 __se_sys_exit_group+0x10/0x10 kernel/exit.c:913 __x64_sys_exit_group+0x37/0x40 kernel/exit.c:913 do_syscall_64+0xf3/0x1b0 arch/x86/entry/common.c:295 entry_SYSCALL_64_after_hwframe+0x49/0xb3 RIP: 0033:0x45ca69 Code: ff 48 8d 3d c9 90 23 01 e8 b4 22 00 00 e9 ec fe ff ff e8 aa 04 00 00 e9 85 fe ff ff cc cc cc cc cc 90 90 90 90 90 90 90 90 90 <90> 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00007fa70645a688 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 000000000000000b RCX: 000000000045ca69 RDX: 000000000045ca69 RSI: 00007fa70645a6c0 RDI: 000000000000000b RBP: 000000000078bf00 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000000c7 R14: 00000000004c377a R15: 00007fa70645b6d4