rcu: INFO: rcu_preempt self-detected stall on CPU rcu: 0-....: (10500 ticks this GP) idle=666/1/0x4000000000000004 softirq=301383/301383 fqs=5250 (t=10502 jiffies g=460109 q=296) NMI backtrace for cpu 0 CPU: 0 PID: 23096 Comm: syz-executor.4 Not tainted 5.2.0-rc1+ #26 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+0x172/0x1f0 lib/dump_stack.c:113 nmi_cpu_backtrace.cold+0x63/0xa4 lib/nmi_backtrace.c:101 nmi_trigger_cpumask_backtrace+0x1be/0x236 lib/nmi_backtrace.c:62 arch_trigger_cpumask_backtrace+0x14/0x20 arch/x86/kernel/apic/hw_nmi.c:38 trigger_single_cpu_backtrace include/linux/nmi.h:164 [inline] rcu_dump_cpu_stacks+0x183/0x1cf kernel/rcu/tree_stall.h:254 print_cpu_stall kernel/rcu/tree_stall.h:455 [inline] check_cpu_stall kernel/rcu/tree_stall.h:529 [inline] rcu_pending kernel/rcu/tree.c:2625 [inline] rcu_sched_clock_irq.cold+0x4d1/0xbfd kernel/rcu/tree.c:2161 update_process_times+0x32/0x80 kernel/time/timer.c:1639 tick_sched_handle+0xa2/0x190 kernel/time/tick-sched.c:167 tick_sched_timer+0x47/0x130 kernel/time/tick-sched.c:1298 __run_hrtimer kernel/time/hrtimer.c:1389 [inline] __hrtimer_run_queues+0x33b/0xdd0 kernel/time/hrtimer.c:1451 hrtimer_interrupt+0x314/0x770 kernel/time/hrtimer.c:1509 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1041 [inline] smp_apic_timer_interrupt+0x111/0x550 arch/x86/kernel/apic/apic.c:1066 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806 RIP: 0010:kasan_check_read+0x0/0x20 mm/kasan/common.c:93 Code: ef e9 24 eb ff ff 48 8b 73 58 89 c2 48 c7 c7 10 f7 61 88 f7 da e8 b4 9e b1 ff e9 c4 f5 ff ff 90 90 90 90 90 90 90 90 90 90 90 <55> 89 f6 31 d2 48 89 e5 48 8b 4d 08 e8 af 23 00 00 5d c3 0f 1f 00 RSP: 0018:ffff8880ae809688 EFLAGS: 00000202 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000000 RBX: ffffe8ffffc6a4e0 RCX: ffffffff81580c77 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffe8ffffc6a4e0 RBP: ffff8880ae809750 R08: 1ffffd1ffff8d49c R09: fffff91ffff8d49d R10: fffff91ffff8d49c R11: ffffe8ffffc6a4e3 R12: 0000000000000001 R13: 0000000000000003 R14: fffff91ffff8d49c R15: 0000000000000002 pv_queued_spin_lock_slowpath arch/x86/include/asm/paravirt.h:654 [inline] queued_spin_lock_slowpath arch/x86/include/asm/qspinlock.h:50 [inline] queued_spin_lock include/asm-generic/qspinlock.h:90 [inline] do_raw_spin_lock+0x20e/0x2e0 kernel/locking/spinlock_debug.c:113 __raw_spin_lock include/linux/spinlock_api_smp.h:143 [inline] _raw_spin_lock+0x37/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] nf_ct_add_to_unconfirmed_list net/netfilter/nf_conntrack_core.c:522 [inline] init_conntrack.isra.0+0xa07/0x1170 net/netfilter/nf_conntrack_core.c:1511 resolve_normal_ct net/netfilter/nf_conntrack_core.c:1552 [inline] nf_conntrack_in+0xd93/0x1410 net/netfilter/nf_conntrack_core.c:1712 ipv4_conntrack_local+0x169/0x210 net/netfilter/nf_conntrack_proto.c:200 nf_hook_entry_hookfn include/linux/netfilter.h:135 [inline] nf_hook_slow+0xbc/0x1e0 net/netfilter/core.c:512 nf_hook include/linux/netfilter.h:260 [inline] __ip_local_out+0x403/0x880 net/ipv4/ip_output.c:114 ip_local_out+0x2d/0x1b0 net/ipv4/ip_output.c:123 igmpv3_sendpack+0x1b5/0x2e0 net/ipv4/igmp.c:429 igmpv3_send_cr net/ipv4/igmp.c:724 [inline] igmp_ifc_timer_expire+0x687/0xa00 net/ipv4/igmp.c:812 call_timer_fn+0x193/0x720 kernel/time/timer.c:1322 expire_timers kernel/time/timer.c:1366 [inline] __run_timers kernel/time/timer.c:1685 [inline] __run_timers kernel/time/timer.c:1653 [inline] run_timer_softirq+0x66f/0x1740 kernel/time/timer.c:1698 __do_softirq+0x25c/0x94c kernel/softirq.c:293 invoke_softirq kernel/softirq.c:374 [inline] irq_exit+0x180/0x1d0 kernel/softirq.c:414 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x13b/0x550 arch/x86/kernel/apic/apic.c:1068 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:806 RIP: 0010:debug_lockdep_rcu_enabled.part.0+0x2a/0x60 kernel/rcu/update.c:237 Code: 48 b8 00 00 00 00 00 fc ff df 55 48 89 e5 53 65 48 8b 1c 25 c0 fd 01 00 48 8d bb 7c 08 00 00 48 89 fa 48 c1 ea 03 0f b6 14 02 <48> 89 f8 83 e0 07 83 c0 03 38 d0 7c 04 84 d2 75 10 8b 93 7c 08 00 RSP: 0018:ffff88805e547bc8 EFLAGS: 00000a03 ORIG_RAX: ffffffffffffff13 RAX: dffffc0000000000 RBX: ffff88808c386700 RCX: 1ffffffff130166e RDX: 0000000000000000 RSI: ffffffff88bc4db8 RDI: ffff88808c386f7c RBP: ffff88805e547bd0 R08: ffff88808c386700 R09: ffffed1015d06be0 R10: ffffed1015d06bdf R11: ffff8880ae835efb R12: ffff88808c386700 R13: dffffc0000000000 R14: ffffffff88bc1720 R15: ffff888098617e00 debug_lockdep_rcu_enabled kernel/rcu/update.c:236 [inline] rcu_read_lock_held+0x71/0xd0 kernel/rcu/update.c:264 task_css include/linux/cgroup.h:480 [inline] mem_cgroup_from_task mm/memcontrol.c:903 [inline] get_mem_cgroup_from_mm mm/memcontrol.c:932 [inline] get_mem_cgroup_from_mm+0x1b5/0x2b0 mm/memcontrol.c:915 get_mem_cgroup_from_current mm/memcontrol.c:978 [inline] memcg_kmem_get_cache+0x146/0x5f0 mm/memcontrol.c:2645 slab_pre_alloc_hook mm/slab.h:425 [inline] slab_alloc mm/slab.c:3312 [inline] kmem_cache_alloc+0x186/0x6f0 mm/slab.c:3488 __d_alloc+0x2e/0x8c0 fs/dcache.c:1622 d_alloc_pseudo+0x1e/0x70 fs/dcache.c:1751 alloc_file_pseudo+0xe2/0x280 fs/file_table.c:225 sock_alloc_file+0x4d/0x170 net/socket.c:414 sock_map_fd net/socket.c:437 [inline] __sys_socket+0x150/0x220 net/socket.c:1527 __do_sys_socket net/socket.c:1532 [inline] __se_sys_socket net/socket.c:1530 [inline] __x64_sys_socket+0x73/0xb0 net/socket.c:1530 do_syscall_64+0xfd/0x680 arch/x86/entry/common.c:301 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45bdc7 Code: 00 00 00 49 89 ca b8 36 00 00 00 0f 05 48 3d 01 f0 ff ff 0f 83 9a 8c fb ff c3 66 0f 1f 84 00 00 00 00 00 b8 29 00 00 00 0f 05 <48> 3d 01 f0 ff ff 0f 83 7d 8c fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007ffc12d5e0c8 EFLAGS: 00000202 ORIG_RAX: 0000000000000029 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045bdc7 RDX: 0000000000000000 RSI: 0000000000080002 RDI: 0000000000000001 RBP: 00000000004be4d1 R08: 00007ffc12d5e153 R09: 000000000000000a R10: 0000000000000004 R11: 0000000000000202 R12: 0000000000000003 R13: 00000000004be4d1 R14: 0000000000000000 R15: 0000000000000006