------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 0 PID: 8631 at kernel/locking/lockdep.c:167 hlock_class kernel/locking/lockdep.c:167 [inline] WARNING: CPU: 0 PID: 8631 at kernel/locking/lockdep.c:167 hlock_class kernel/locking/lockdep.c:156 [inline] WARNING: CPU: 0 PID: 8631 at kernel/locking/lockdep.c:167 mark_lock+0x22b/0x1220 kernel/locking/lockdep.c:3643 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 8631 Comm: syz-executor.0 Not tainted 5.5.0-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+0x197/0x210 lib/dump_stack.c:118 panic+0x2e3/0x75c kernel/panic.c:221 __warn.cold+0x2f/0x3e kernel/panic.c:582 report_bug+0x289/0x300 lib/bug.c:195 fixup_bug arch/x86/kernel/traps.c:174 [inline] fixup_bug arch/x86/kernel/traps.c:169 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:267 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:286 invalid_op+0x23/0x30 arch/x86/entry/entry_64.S:1027 RIP: 0010:hlock_class kernel/locking/lockdep.c:167 [inline] RIP: 0010:hlock_class kernel/locking/lockdep.c:156 [inline] RIP: 0010:mark_lock+0x22b/0x1220 kernel/locking/lockdep.c:3643 Code: d0 7c 08 84 d2 0f 85 a8 0e 00 00 44 8b 1d fd 48 21 09 45 85 db 75 b6 48 c7 c6 60 95 2b 88 48 c7 c7 a0 95 2b 88 e8 d4 38 eb ff <0f> 0b 31 db e9 aa fe ff ff 48 c7 c7 60 65 66 8b e8 a0 49 58 00 e9 RSP: 0018:ffffc90000007398 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff815e8b46 RDI: fffff52000000e65 RBP: ffffc900000073e8 R08: ffff88802e0021c0 R09: fffffbfff1333569 R10: fffffbfff1333568 R11: ffffffff8999ab43 R12: 0000000000000004 R13: ffff88802e002b98 R14: 0000000000000001 R15: 0000000000042bb5 mark_usage kernel/locking/lockdep.c:3566 [inline] __lock_acquire+0x1e8e/0x4a00 kernel/locking/lockdep.c:3909 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4485 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2f/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:338 [inline] __netif_tx_lock include/linux/netdevice.h:3934 [inline] sch_direct_xmit+0x2e0/0xd30 net/sched/sch_generic.c:311 __dev_xmit_skb net/core/dev.c:3621 [inline] __dev_queue_xmit+0x2707/0x35c0 net/core/dev.c:3982 dev_queue_xmit+0x18/0x20 net/core/dev.c:4046 neigh_hh_output include/net/neighbour.h:499 [inline] neigh_output include/net/neighbour.h:508 [inline] ip6_finish_output2+0xfbe/0x25c0 net/ipv6/ip6_output.c:116 __ip6_finish_output+0x444/0xaa0 net/ipv6/ip6_output.c:142 ip6_finish_output+0x38/0x1f0 net/ipv6/ip6_output.c:152 NF_HOOK_COND include/linux/netfilter.h:296 [inline] ip6_output+0x25e/0x880 net/ipv6/ip6_output.c:175 dst_output include/net/dst.h:436 [inline] NF_HOOK include/linux/netfilter.h:307 [inline] NF_HOOK include/linux/netfilter.h:301 [inline] mld_sendpack+0x9c2/0xed0 net/ipv6/mcast.c:1682 mld_send_cr net/ipv6/mcast.c:1978 [inline] mld_ifc_timer_expire+0x454/0x950 net/ipv6/mcast.c:2477 call_timer_fn+0x1ac/0x780 kernel/time/timer.c:1404 expire_timers kernel/time/timer.c:1449 [inline] __run_timers kernel/time/timer.c:1773 [inline] __run_timers kernel/time/timer.c:1740 [inline] run_timer_softirq+0x6c3/0x1790 kernel/time/timer.c:1786 __do_softirq+0x262/0x98c kernel/softirq.c:292 invoke_softirq kernel/softirq.c:373 [inline] irq_exit+0x19b/0x1e0 kernel/softirq.c:413 exiting_irq arch/x86/include/asm/apic.h:536 [inline] smp_apic_timer_interrupt+0x1a3/0x610 arch/x86/kernel/apic/apic.c:1137 apic_timer_interrupt+0xf/0x20 arch/x86/entry/entry_64.S:829 RIP: 0010:__read_once_size include/linux/compiler.h:199 [inline] RIP: 0010:arch_atomic_read arch/x86/include/asm/atomic.h:31 [inline] RIP: 0010:atomic_read include/asm-generic/atomic-instrumented.h:27 [inline] RIP: 0010:rcu_dynticks_curr_cpu_in_eqs+0x54/0xb0 kernel/rcu/tree.c:301 Code: 89 48 89 f9 48 c1 e9 03 80 3c 11 00 75 63 48 03 1c c5 60 e1 57 89 be 04 00 00 00 4c 8d a3 e0 00 00 00 4c 89 e7 e8 7c 0b 50 00 <4c> 89 e2 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 0f b6 14 02 4c RSP: 0018:ffffc900016b7a18 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000001 RBX: ffff8880ae838100 RCX: ffffffff8162ae34 RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffff8880ae8381e0 RBP: ffffc900016b7a30 R08: 1ffff11015d0703c R09: ffffed1015d0703d R10: ffffed1015d0703c R11: ffff8880ae8381e3 R12: ffff8880ae8381e0 R13: 0000000000000001 R14: ffff888094681000 R15: ffff8880a74ccfd0 rcu_is_watching+0x10/0x30 kernel/rcu/tree.c:922 rcu_read_unlock include/linux/rcupdate.h:667 [inline] percpu_ref_tryget+0x13e/0x230 include/linux/percpu-refcount.h:235 css_tryget include/linux/cgroup.h:351 [inline] get_mem_cgroup_from_mm+0x29c/0x310 mm/memcontrol.c:942 get_mem_cgroup_from_current mm/memcontrol.c:984 [inline] __memcg_kmem_charge+0x119/0x3a0 mm/memcontrol.c:2875 memcg_kmem_charge include/linux/memcontrol.h:1395 [inline] memcg_charge_kernel_stack kernel/fork.c:421 [inline] dup_task_struct kernel/fork.c:876 [inline] copy_process+0x79d/0x7230 kernel/fork.c:1911 _do_fork+0x146/0x1090 kernel/fork.c:2421 __do_sys_clone kernel/fork.c:2576 [inline] __se_sys_clone kernel/fork.c:2557 [inline] __x64_sys_clone+0x19a/0x260 kernel/fork.c:2557 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x45d919 Code: ff 48 85 f6 0f 84 d7 8c fb ff 48 83 ee 10 48 89 4e 08 48 89 3e 48 89 d7 4c 89 c2 4d 89 c8 4c 8b 54 24 08 b8 38 00 00 00 0f 05 <48> 85 c0 0f 8c ae 8c fb ff 74 01 c3 31 ed 48 f7 c7 00 00 01 00 75 RSP: 002b:0000000000a6fac8 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: ffffffffffffffda RBX: 00007f86b4822700 RCX: 000000000045d919 RDX: 00007f86b48229d0 RSI: 00007f86b4821db0 RDI: 00000000003d0f00 RBP: 0000000000a6fce0 R08: 00007f86b4822700 R09: 00007f86b4822700 R10: 00007f86b48229d0 R11: 0000000000000202 R12: 0000000000000000 R13: 0000000000a6fb7f R14: 0000000000020000 R15: 0000000001b9db70 Kernel Offset: disabled Rebooting in 86400 seconds..