================================ WARNING: inconsistent lock state 4.15.0-rc9+ #283 Not tainted -------------------------------- inconsistent {SOFTIRQ-ON-W} -> {IN-SOFTIRQ-W} usage. sshd/3672 [HC0[0]:SC1[1]:HE1:SE0] takes: (&(&est->lock)->rlock){+.?.}, at: [<00000000c1a45538>] spin_lock include/linux/spinlock.h:310 [inline] (&(&est->lock)->rlock){+.?.}, at: [<00000000c1a45538>] est_fetch_counters+0x4f/0x150 net/core/gen_estimator.c:70 {SOFTIRQ-ON-W} state was registered at: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] est_fetch_counters+0x4f/0x150 net/core/gen_estimator.c:70 gen_new_estimator+0x317/0x770 net/core/gen_estimator.c:162 xt_rateest_tg_checkentry+0x487/0xaa0 net/netfilter/xt_RATEEST.c:135 xt_check_target+0x22c/0x7d0 net/netfilter/x_tables.c:845 check_target net/ipv6/netfilter/ip6_tables.c:538 [inline] find_check_entry.isra.7+0x935/0xcf0 net/ipv6/netfilter/ip6_tables.c:580 translate_table+0xf52/0x1690 net/ipv6/netfilter/ip6_tables.c:749 do_replace net/ipv6/netfilter/ip6_tables.c:1167 [inline] do_ip6t_set_ctl+0x370/0x5f0 net/ipv6/netfilter/ip6_tables.c:1693 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x115/0x150 net/ipv6/ipv6_sockglue.c:928 udpv6_setsockopt+0x45/0x80 net/ipv6/udp.c:1452 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1831 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1810 entry_SYSCALL_64_fastpath+0x29/0xa0 irq event stamp: 435818 hardirqs last enabled at (435818): [<00000000e7e7097b>] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:168 [inline] hardirqs last enabled at (435818): [<00000000e7e7097b>] _raw_spin_unlock_irq+0x27/0x70 kernel/locking/spinlock.c:192 hardirqs last disabled at (435817): [<00000000e1ed4304>] __raw_spin_lock_irq include/linux/spinlock_api_smp.h:126 [inline] hardirqs last disabled at (435817): [<00000000e1ed4304>] _raw_spin_lock_irq+0x3c/0x80 kernel/locking/spinlock.c:160 softirqs last enabled at (435724): [<00000000f84be45f>] spin_unlock_bh include/linux/spinlock.h:355 [inline] softirqs last enabled at (435724): [<00000000f84be45f>] release_sock+0x1d4/0x2a0 net/core/sock.c:2790 softirqs last disabled at (435811): [<00000000714495c2>] invoke_softirq kernel/softirq.c:365 [inline] softirqs last disabled at (435811): [<00000000714495c2>] irq_exit+0x1cc/0x200 kernel/softirq.c:405 other info that might help us debug this: Possible unsafe locking scenario: CPU0 ---- lock(&(&est->lock)->rlock); lock(&(&est->lock)->rlock); *** DEADLOCK *** 2 locks held by sshd/3672: #0: (&mm->mmap_sem){++++}, at: [<000000003419efd7>] __might_fault+0xe0/0x1d0 mm/memory.c:4534 #1: ((&est->timer)){+.-.}, at: [<0000000015b95b6a>] lockdep_copy_map include/linux/lockdep.h:178 [inline] #1: ((&est->timer)){+.-.}, at: [<0000000015b95b6a>] call_timer_fn+0x1c6/0x820 kernel/time/timer.c:1308 stack backtrace: CPU: 0 PID: 3672 Comm: sshd Not tainted 4.15.0-rc9+ #283 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_usage_bug+0x377/0x38c kernel/locking/lockdep.c:2537 valid_state kernel/locking/lockdep.c:2550 [inline] mark_lock_irq kernel/locking/lockdep.c:2744 [inline] mark_lock+0xf61/0x1430 kernel/locking/lockdep.c:3142 mark_irqflags kernel/locking/lockdep.c:3020 [inline] __lock_acquire+0x173a/0x3e00 kernel/locking/lockdep.c:3383 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:144 spin_lock include/linux/spinlock.h:310 [inline] est_fetch_counters+0x4f/0x150 net/core/gen_estimator.c:70 est_timer+0x97/0x7c0 net/core/gen_estimator.c:85 call_timer_fn+0x228/0x820 kernel/time/timer.c:1318 expire_timers kernel/time/timer.c:1355 [inline] __run_timers+0x7ee/0xb70 kernel/time/timer.c:1658 run_timer_softirq+0x4c/0x70 kernel/time/timer.c:1684 __do_softirq+0x2d7/0xb85 kernel/softirq.c:285 invoke_softirq kernel/softirq.c:365 [inline] irq_exit+0x1cc/0x200 kernel/softirq.c:405 exiting_irq arch/x86/include/asm/apic.h:541 [inline] smp_apic_timer_interrupt+0x16b/0x700 arch/x86/kernel/apic/apic.c:1052 apic_timer_interrupt+0xa9/0xb0 arch/x86/entry/entry_64.S:937 RIP: 0010:arch_local_irq_restore arch/x86/include/asm/paravirt.h:777 [inline] RIP: 0010:lock_acquire+0x256/0x580 kernel/locking/lockdep.c:3917 RSP: 0018:ffff8801bd74fd00 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff11 RAX: dffffc0000000000 RBX: ffff8801bc898000 RCX: 0000000000000000 RDX: 1ffffffff0d5918d RSI: 0000000073727064 RDI: 0000000000000282 RBP: ffff8801bd74fdf8 R08: 1ffff10037ae9f03 R09: 0000000000000005 R10: ffff8801bd74fce0 R11: 0000000000000003 R12: 1ffff10037ae9fa6 R13: 0000000000000000 R14: 0000000000000001 R15: 0000000000000001 __might_fault+0x13a/0x1d0 mm/memory.c:4535 _copy_from_user+0x2c/0x110 lib/usercopy.c:10 copy_from_user include/linux/uaccess.h:147 [inline] SYSC_rt_sigprocmask kernel/signal.c:2583 [inline] SyS_rt_sigprocmask+0x112/0x220 kernel/signal.c:2570 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x7f78602493e0 RSP: 002b:00007ffd60bdecc8 EFLAGS: 00000246 ORIG_RAX: 000000000000000e RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007f78602493e0 RDX: 0000000000000000 RSI: 00007ffd60bdece0 RDI: 0000000000000002 RBP: 00005615187ea460 R08: 00007ffd60bdeda0 R09: 0101010101010101 R10: 0000000000000008 R11: 0000000000000246 R12: 00007ffd60bded5c R13: 000056151749dfb4 R14: 0000000000000028 R15: 000056151749fca0