rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 1-....: (1 GPs behind) idle=91e/1/0x4000000000000004 softirq=83678/83679 fqs=5236 (t=10500 jiffies g=60129 q=370193) NMI backtrace for cpu 1 CPU: 1 PID: 13028 Comm: syz-executor.5 Not tainted 5.6.0-rc5-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+0x169/0x250 kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:475 [inline] check_cpu_stall kernel/rcu/tree_stall.h:549 [inline] rcu_pending kernel/rcu/tree.c:3030 [inline] rcu_sched_clock_irq+0x171f/0x1970 kernel/rcu/tree.c:2276 update_process_times+0x12c/0x180 kernel/time/timer.c:1726 tick_sched_handle kernel/time/tick-sched.c:171 [inline] tick_sched_timer+0x254/0x410 kernel/time/tick-sched.c:1314 __run_hrtimer kernel/time/hrtimer.c:1517 [inline] __hrtimer_run_queues+0x3cf/0x7d0 kernel/time/hrtimer.c:1579 hrtimer_interrupt+0x373/0xd60 kernel/time/hrtimer.c:1641 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1119 [inline] smp_apic_timer_interrupt+0x109/0x280 arch/x86/kernel/apic/apic.c:1144 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:lock_is_held_type+0x25e/0x2b0 kernel/locking/lockdep.c:4526 Code: c1 e8 03 42 80 3c 38 00 74 0c 48 c7 c7 58 d4 0a 89 e8 76 d3 56 00 48 83 3d 86 bc b0 07 00 74 53 4c 89 f7 57 9d 0f 1f 44 00 00 <89> e8 48 83 c4 20 5b 41 5c 41 5d 41 5e 41 5f 5d c3 44 89 e1 80 e1 RSP: 0018:ffffc90000da8c60 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 RAX: 1ffffffff1215a8b RBX: 1ffff1100918891a RCX: 0000000000000103 RDX: dffffc0000000000 RSI: ffff888048c44948 RDI: 0000000000000282 RBP: 0000000000000000 R08: ffffffff83988953 R09: ffffed1015d27004 R10: ffffed1015d27004 R11: 0000000000000000 R12: ffff888048c448d4 R13: ffffffff890d9ae0 R14: 0000000000000282 R15: dffffc0000000000 lock_is_held include/linux/lockdep.h:361 [inline] rcu_read_lock_sched_held+0x106/0x170 kernel/rcu/update.c:121 trace_kmem_cache_free+0xb2/0x100 include/trace/events/kmem.h:145 inet_twsk_bind_unhash net/ipv4/inet_timewait_sock.c:39 [inline] inet_twsk_kill+0x40c/0x580 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+0x268/0x7c5 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:1146 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:vma_interval_tree_iter_next+0x5b/0x370 mm/interval_tree.c:23 Code: c1 e8 03 42 80 3c 38 00 74 08 48 89 df e8 dd eb 10 00 4c 8b 33 4d 85 f6 74 45 49 8d 5e 18 48 89 d8 48 c1 e8 03 42 80 3c 38 00 <74> 08 48 89 df e8 bb eb 10 00 48 8b 1b 48 89 df 48 8b 2c 24 48 89 RSP: 0018:ffffc900050176a0 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 1ffff11012ea8160 RBX: ffff888097540b00 RCX: ffff888048c44040 RDX: 0000000000000000 RSI: 000000000000003e RDI: ffff8880a2f48a50 RBP: ffff8880a2f48a50 R08: ffffffff81a6a89a R09: fffff9400045f31f R10: fffff9400045f31f R11: 0000000000000000 R12: 1ffff92000a02eef R13: ffff8880a2f48a50 R14: ffff888097540ae8 R15: dffffc0000000000 rmap_walk_file+0x467/0x730 mm/rmap.c:1911 rmap_walk mm/rmap.c:1938 [inline] try_to_munlock+0x3c2/0x540 mm/rmap.c:1789 __munlock_isolated_page+0x3a/0x1a0 mm/mlock.c:138 __munlock_pagevec+0x9ce/0xe40 mm/mlock.c:346 munlock_vma_pages_range+0xb11/0xdb0 mm/mlock.c:499 munlock_vma_pages_all mm/internal.h:306 [inline] exit_mmap+0x1a4/0x530 mm/mmap.c:3110 __mmput+0x113/0x350 kernel/fork.c:1082 exit_mm+0x4cd/0x550 kernel/exit.c:485 do_exit+0x56e/0x1f80 kernel/exit.c:788 do_group_exit+0x15e/0x2c0 kernel/exit.c:899 get_signal+0x13cf/0x1d60 kernel/signal.c:2739 do_signal+0x33/0x610 arch/x86/kernel/signal.c:813 exit_to_usermode_loop arch/x86/entry/common.c:160 [inline] prepare_exit_to_usermode+0x32a/0x600 arch/x86/entry/common.c:195 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45c4a9 Code: Bad RIP value. RSP: 002b:00007fbc270b6c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000097 RAX: 0000000000000000 RBX: 00007fbc270b76d4 RCX: 000000000045c4a9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 000000000076bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000736 R14: 00000000004c9bc2 R15: 000000000076bf2c