------------[ cut here ]------------ DEBUG_LOCKS_WARN_ON(1) WARNING: CPU: 1 PID: 15501 at kernel/locking/lockdep.c:167 hlock_class kernel/locking/lockdep.c:167 [inline] WARNING: CPU: 1 PID: 15501 at kernel/locking/lockdep.c:167 hlock_class kernel/locking/lockdep.c:156 [inline] WARNING: CPU: 1 PID: 15501 at kernel/locking/lockdep.c:167 mark_lock+0x22b/0x1220 kernel/locking/lockdep.c:3643 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 15501 Comm: blkid Not tainted 5.5.0-rc2-next-20191218-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 9d da 26 09 45 85 db 75 b6 48 c7 c6 c0 93 2b 88 48 c7 c7 00 94 2b 88 e8 b4 33 eb ff <0f> 0b 31 db e9 aa fe ff ff 48 c7 c7 60 65 64 8b e8 30 8f 58 00 e9 RSP: 0000:ffffc90000da8398 EFLAGS: 00010086 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000100 RSI: ffffffff815e9766 RDI: fffff520001b5065 RBP: ffffc90000da83e8 R08: ffff88803208c080 R09: fffffbfff133492d R10: fffffbfff133492c R11: ffffffff899a4963 R12: 0000000000000004 R13: ffff88803208ca88 R14: 0000000000000001 R15: 0000000000042788 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:3935 [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:__sanitizer_cov_trace_pc+0x26/0x50 kernel/kcov.c:187 Code: 00 00 00 00 55 48 89 e5 65 48 8b 04 25 c0 1e 02 00 65 8b 15 14 d1 8c 7e 81 e2 00 01 1f 00 48 8b 75 08 75 2b 8b 90 88 13 00 00 <83> fa 02 75 20 48 8b 88 90 13 00 00 8b 80 8c 13 00 00 48 8b 11 48 RSP: 0000:ffffc90001af7b90 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff13 RAX: ffff88803208c080 RBX: ffffc90001af7c98 RCX: ffffffff819340c5 RDX: 0000000000000000 RSI: ffffffff819340e9 RDI: 0000000000000007 RBP: ffffc90001af7b90 R08: ffff88803208c080 R09: fffff5200035ef84 R10: fffff5200035ef83 R11: 0000000000000003 R12: ffffea00002a2d40 R13: ffff8880a1eb3798 R14: ffff8880a1eb05c0 R15: 0000000000000015 xas_reload include/linux/xarray.h:1492 [inline] filemap_map_pages+0x489/0x1510 mm/filemap.c:2629 do_fault_around mm/memory.c:3598 [inline] do_read_fault mm/memory.c:3632 [inline] do_fault mm/memory.c:3766 [inline] handle_pte_fault mm/memory.c:3997 [inline] __handle_mm_fault+0x394a/0x3c20 mm/memory.c:4127 handle_mm_fault+0x3b2/0xa50 mm/memory.c:4164 do_user_addr_fault arch/x86/mm/fault.c:1464 [inline] __do_page_fault+0x536/0xd80 arch/x86/mm/fault.c:1529 do_page_fault+0x38/0x590 arch/x86/mm/fault.c:1553 page_fault+0x39/0x40 arch/x86/entry/entry_64.S:1203 RIP: 0033:0x7f83338244c0 Code: 00 00 e9 f9 fe ff ff 48 8d 3d ec 2d 35 00 48 81 ec 80 00 00 00 e8 90 58 0b 00 48 81 c4 80 00 00 00 e9 23 ff ff ff 90 90 90 90 <41> 57 45 31 ff 41 56 49 89 d6 41 55 41 54 49 89 cc 55 48 89 fd 53 RSP: 002b:00007fffb367bb68 EFLAGS: 00010297 RAX: 0000000000000000 RBX: 0000000076036300 RCX: 0000000000000008 RDX: 0000000000000044 RSI: 00007f83339397a0 RDI: 00007fffb367bb70 RBP: 0000000000000003 R08: 00007f833387f840 R09: 0000000000000006 R10: 00007fffb367b9e0 R11: 00007fffb367b9e0 R12: 00007fffb367bbde R13: 00000000000000bc R14: 00007fffb367bbdf R15: 00007fffb367bbde Kernel Offset: disabled Rebooting in 86400 seconds..