rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (1 GPs behind) idle=bce/1/0x4000000000000004 softirq=163099/163100 fqs=5151 rcu: (t=10500 jiffies g=169597 q=214226) NMI backtrace for cpu 0 CPU: 0 PID: 23255 Comm: syz-executor.0 Not tainted 4.19.128-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+0x1fc/0x2fe 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.isra.0+0x91/0x180 kernel/time/tick-sched.c:168 tick_sched_timer+0x44/0x130 kernel/time/tick-sched.c:1278 __run_hrtimer kernel/time/hrtimer.c:1401 [inline] __hrtimer_run_queues+0x2ec/0xd20 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:894 RIP: 0010:unwind_next_frame+0x45b/0x1b10 arch/x86/kernel/unwind_orc.c:431 Code: 00 4c 89 c7 e8 c6 f4 ff ff 48 89 c1 48 85 c9 74 68 4c 8d 41 04 48 b8 00 00 00 00 00 fc ff df 4c 89 c2 48 c1 ea 03 0f b6 04 02 <4c> 89 c2 83 e2 07 38 d0 7f 08 84 c0 0f 85 fb 0f 00 00 0f b6 41 04 RSP: 0018:ffff8880ae607720 EFLAGS: 00000a06 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: 1ffff11015cc0eec RCX: ffffffff8a5d35e4 RDX: 1ffffffff14ba6bd RSI: ffffffff8a5d35e4 RDI: ffffffff89e49cbc RBP: 0000000000000002 R08: ffffffff8a5d35e8 R09: ffffffff8a5d3608 R10: 0000000000137b08 R11: 0000000000064061 R12: ffff8880ae607840 R13: ffff8880ae60782d R14: ffff8880ae607830 R15: ffff8880ae6077f8 __save_stack_trace+0x83/0x100 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc.part.0+0x4f/0xd0 mm/kasan/kasan.c:553 kmem_cache_alloc_node_trace+0x151/0x3b0 mm/slab.c:3668 __do_kmalloc_node mm/slab.c:3688 [inline] __kmalloc_node_track_caller+0x38/0x70 mm/slab.c:3703 __kmalloc_reserve.isra.0+0x39/0xe0 net/core/skbuff.c:137 __alloc_skb+0xef/0x5b0 net/core/skbuff.c:205 alloc_skb include/linux/skbuff.h:995 [inline] mrp_pdu_init net/802/mrp.c:303 [inline] mrp_pdu_append_vecattr_event+0x76d/0xf60 net/802/mrp.c:402 mrp_attr_event+0x15d/0x220 net/802/mrp.c:497 mrp_mad_event+0x47/0x60 net/802/mrp.c:577 mrp_join_timer+0x33/0x78 net/802/mrp.c:594 call_timer_fn+0x177/0x700 kernel/time/timer.c:1326 expire_timers+0x24f/0x4f0 kernel/time/timer.c:1363 __run_timers kernel/time/timer.c:1684 [inline] run_timer_softirq+0x218/0x660 kernel/time/timer.c:1697 __do_softirq+0x26c/0x93d 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:894 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:__sanitizer_cov_trace_pc+0x4/0x50 kernel/kcov.c:100 Code: 2d 6e 87 4c 89 25 9c 92 06 0a 41 bc f4 ff ff ff e8 1a a4 eb ff 48 c7 05 86 92 06 0a 00 00 00 00 e9 24 ec ff ff 90 48 8b 34 24 <65> 48 8b 04 25 40 ee 01 00 65 8b 15 fc 52 9a 7e 81 e2 00 01 1f 00 RSP: 0018:ffff88821b3af658 EFLAGS: 00000293 ORIG_RAX: ffffffffffffff13 RAX: ffff8880197784c0 RBX: 00000000000239c0 RCX: 1ffffffff11f8958 RDX: 0000000000000000 RSI: ffffffff835662e5 RDI: ffffffff87aae6c0 RBP: ffffffff87aae6c0 R08: 0000000000000000 R09: 0000000000000001 R10: ffff888019778d70 R11: 58851561e02f6094 R12: ffffea00025553c8 R13: ffffffff87aae680 R14: 0000000000000000 R15: dead000000000100 check_preemption_disabled+0x15/0x280 lib/smp_processor_id.c:13 rcu_dynticks_curr_cpu_in_eqs+0x12/0xa0 kernel/rcu/tree.c:348 rcu_is_watching+0xc/0x20 kernel/rcu/tree.c:1025 rcu_read_lock include/linux/rcupdate.h:628 [inline] lock_page_memcg+0x135/0x230 mm/memcontrol.c:1908 page_remove_file_rmap mm/rmap.c:1215 [inline] page_remove_rmap+0x53e/0x12e0 mm/rmap.c:1300 zap_pte_range mm/memory.c:1338 [inline] zap_pmd_range mm/memory.c:1440 [inline] zap_pud_range mm/memory.c:1469 [inline] zap_p4d_range mm/memory.c:1490 [inline] unmap_page_range+0x1230/0x2bb0 mm/memory.c:1511 unmap_single_vma+0x196/0x300 mm/memory.c:1556 unmap_vmas+0xa9/0x180 mm/memory.c:1586 exit_mmap+0x2b9/0x510 mm/mmap.c:3091 __mmput kernel/fork.c:1015 [inline] mmput+0x14e/0x420 kernel/fork.c:1036 exit_mm kernel/exit.c:546 [inline] do_exit+0xac4/0x2f00 kernel/exit.c:867 do_group_exit+0x125/0x310 kernel/exit.c:983 get_signal+0x3f5/0x1f30 kernel/signal.c:2588 do_signal+0x8f/0x1620 arch/x86/kernel/signal.c:821 exit_to_usermode_loop+0x204/0x2a0 arch/x86/entry/common.c:163 prepare_exit_to_usermode arch/x86/entry/common.c:198 [inline] syscall_return_slowpath arch/x86/entry/common.c:271 [inline] do_syscall_64+0x538/0x620 arch/x86/entry/common.c:296 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45ca69 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:00007fd0604fec78 EFLAGS: 00000246 ORIG_RAX: 0000000000000009 RAX: 0000000020000000 RBX: 00000000004f6740 RCX: 000000000045ca69 RDX: 0000000000000004 RSI: 0000000000003000 RDI: 0000000020000000 RBP: 000000000078bf00 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000011 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000755 R14: 00000000004ca429 R15: 00007fd0604ff6d4 rcu: INFO: rcu_sched detected stalls on CPUs/tasks: rcu: 0-....: (1 GPs behind) idle=bce/1/0x4000000000000002 softirq=163099/163100 fqs=5151 rcu: (detected by 1, t=10588 jiffies, g=5885, q=2) Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 3687 Comm: systemd-journal Not tainted 4.19.128-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:unwind_next_frame+0x76d/0x1b10 arch/x86/kernel/unwind_orc.c:441 Code: 00 4c 8b 44 24 28 48 8b 54 24 20 48 8b 4c 24 18 e9 ef fe ff ff 48 b8 00 00 00 00 00 fc ff df 4c 89 f2 48 c1 ea 03 80 3c 02 00 <0f> 85 ae 0e 00 00 48 89 c8 49 8b 57 38 48 be 00 00 00 00 00 fc ff RSP: 0018:ffff888094227728 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: 1ffff11012844eed RCX: ffffffff89f711fc RDX: 1ffff11012844f07 RSI: 0000000000000000 RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffff89f71200 R09: 0000000000000001 R10: 000000000002750a R11: 0000000000064061 R12: ffff888094227848 R13: ffff888094227835 R14: ffff888094227838 R15: ffff888094227800 FS: 00007f3a8f8b18c0(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f3a8ce5f000 CR3: 0000000094048000 CR4: 00000000001406f0 DR0: 0000000000000000 DR1: 0000000000004000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __save_stack_trace+0x83/0x100 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/kasan.c:448 [inline] set_track mm/kasan/kasan.c:460 [inline] kasan_kmalloc.part.0+0x4f/0xd0 mm/kasan/kasan.c:553 kmem_cache_alloc+0x124/0x370 mm/slab.c:3559 kmem_cache_zalloc include/linux/slab.h:699 [inline] __alloc_file+0x21/0x330 fs/file_table.c:100 alloc_empty_file+0x6d/0x170 fs/file_table.c:150 path_openat+0xef/0x2eb0 fs/namei.c:3526 do_filp_open+0x1a1/0x280 fs/namei.c:3567 do_sys_open+0x3aa/0x510 fs/open.c:1085 do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f3a8ee41840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007fffce96a758 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007fffce96aa60 RCX: 00007f3a8ee41840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 000055afda382d70 RBP: 000000000000000d R08: 00007f3a8ee2bbc8 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 000055afda37c060 R14: 00007fffce96aa20 R15: 000055afda389790 nla_parse: 7 callbacks suppressed netlink: 24 bytes leftover after parsing attributes in process `syz-executor.4'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor.5'. IPv6: ADDRCONF(NETDEV_UP): vlan587: link is not ready netlink: 24 bytes leftover after parsing attributes in process `syz-executor.3'. IPv6: ADDRCONF(NETDEV_UP): vlan200: link is not ready