------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 0 PID: 28034 at kernel/locking/lockdep.c:167 hlock_class kernel/locking/lockdep.c:167 [inline] WARNING: CPU: 0 PID: 28034 at kernel/locking/lockdep.c:167 hlock_class kernel/locking/lockdep.c:156 [inline] WARNING: CPU: 0 PID: 28034 at kernel/locking/lockdep.c:167 mark_lock+0x22b/0x1220 kernel/locking/lockdep.c:3642 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 28034 Comm: udevd Not tainted 5.5.0-rc5-next-20200110-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:176 [inline] fixup_bug arch/x86/kernel/traps.c:171 [inline] do_error_trap+0x11b/0x200 arch/x86/kernel/traps.c:269 do_invalid_op+0x37/0x50 arch/x86/kernel/traps.c:288 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:3642 Code: d0 7c 08 84 d2 0f 85 a8 0e 00 00 44 8b 1d 8d 56 4a 09 45 85 db 75 b6 48 c7 c6 60 7d 4b 88 48 c7 c7 a0 7d 4b 88 e8 54 31 eb ff <0f> 0b 31 db e9 aa fe ff ff 48 c7 c7 e0 34 88 8b e8 70 e2 58 00 e9 RSP: 0018:ffffc90000007398 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff815e6386 RDI: fffff52000000e65 RBP: ffffc900000073e8 R08: ffff88804c5d6200 R09: fffffbfff1374671 R10: fffffbfff1374670 R11: ffffffff89ba3383 R12: 0000000000000004 R13: ffff88804c5d6bb8 R14: 0000000000000001 R15: 0000000000042dbc mark_usage kernel/locking/lockdep.c:3565 [inline] __lock_acquire+0x1e8e/0x4a00 kernel/locking/lockdep.c:3908 lock_acquire+0x190/0x410 kernel/locking/lockdep.c:4484 __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:3937 [inline] sch_direct_xmit+0x2e0/0xd30 net/sched/sch_generic.c:311 __dev_xmit_skb net/core/dev.c:3621 [inline] __dev_queue_xmit+0x2713/0x35c0 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:arch_local_irq_restore arch/x86/include/asm/paravirt.h:752 [inline] RIP: 0010:kmem_cache_free+0xab/0x320 mm/slab.c:3695 Code: e8 4a 29 00 00 84 c0 74 77 41 f7 c6 00 02 00 00 74 4f e8 c8 ae c7 ff 48 83 3d d8 a3 00 08 00 0f 84 fa 01 00 00 4c 89 f7 57 9d <0f> 1f 44 00 00 4c 8b 6d 08 0f 1f 44 00 00 65 8b 05 b8 a7 4e 7e 83 RSP: 0018:ffffc90016e3f998 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 RAX: 0000000000000007 RBX: ffff88809817d630 RCX: 0000000000000006 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000286 RBP: ffffc90016e3f9b8 R08: 1ffffffff16a2ba0 R09: fffffbfff16a2ba1 R10: fffffbfff16a2ba0 R11: ffffffff8b515d07 R12: ffff88821bc46c40 R13: ffffffff8144e99d R14: 0000000000000286 R15: 0000000000000045 vm_area_free+0x1d/0x30 kernel/fork.c:370 remove_vma+0x13f/0x180 mm/mmap.c:181 exit_mmap+0x361/0x530 mm/mmap.c:3156 __mmput kernel/fork.c:1082 [inline] mmput+0x179/0x4d0 kernel/fork.c:1103 exec_mmap fs/exec.c:1052 [inline] flush_old_exec+0x8ef/0x1de0 fs/exec.c:1285 load_elf_binary+0x89e/0x4b30 fs/binfmt_elf.c:848 search_binary_handler fs/exec.c:1663 [inline] search_binary_handler+0x16d/0x570 fs/exec.c:1640 exec_binprm fs/exec.c:1706 [inline] __do_execve_file.isra.0+0x1329/0x22b0 fs/exec.c:1826 do_execveat_common fs/exec.c:1872 [inline] do_execve fs/exec.c:1889 [inline] __do_sys_execve fs/exec.c:1965 [inline] __se_sys_execve fs/exec.c:1960 [inline] __x64_sys_execve+0x8f/0xc0 fs/exec.c:1960 do_syscall_64+0xfa/0x790 arch/x86/entry/common.c:294 entry_SYSCALL_64_after_hwframe+0x49/0xbe RIP: 0033:0x7f51cf133207 Code: Bad RIP value. RSP: 002b:00007ffd06b8c648 EFLAGS: 00000206 ORIG_RAX: 000000000000003b RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 00007f51cf133207 RDX: 000000000249bfe0 RSI: 00007ffd06b8c740 RDI: 00007ffd06b8d750 RBP: 0000000000625500 R08: 00000000000026ae R09: 00000000000026ae R10: 0000000000000000 R11: 0000000000000206 R12: 000000000249bfe0 R13: 0000000000000007 R14: 000000000248b250 R15: 0000000000000005 Kernel Offset: disabled Rebooting in 86400 seconds..