====================================== | | [ 69.199600][ C0] ------------[ cut here ]------------ | [ 69.200039][ C0] kernel BUG at net/core/skbuff.c:2813! | [ 69.200338][ C0] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 69.201034][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 69.201584][ C0] Workqueue: events mptcp_worker [ 69.201843][ C0] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 69.202177][ C0] Code: e9 52 f7 ff ff 48 8b 7c 24 38 be 02 00 00 00 e8 8e 9c ff ff 48 83 c4 58 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 90 <0f> 0b 48 c7 44 24 38 00 00 00 00 e9 dc fa ff ff 84 c9 0f 84 4b f9 All code ======== 0: e9 52 f7 ff ff jmp 0xfffffffffffff757 5: 48 8b 7c 24 38 mov 0x38(%rsp),%rdi a: be 02 00 00 00 mov $0x2,%esi f: e8 8e 9c ff ff call 0xffffffffffff9ca2 14: 48 83 c4 58 add $0x58,%rsp 18: 31 c0 xor %eax,%eax 1a: 5b pop %rbx 1b: 41 5c pop %r12 1d: 41 5d pop %r13 1f: 41 5e pop %r14 21: 41 5f pop %r15 23: 5d pop %rbp 24: c3 ret 25: cc int3 26: cc int3 27: cc int3 28: cc int3 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 48 c7 44 24 38 00 00 movq $0x0,0x38(%rsp) 33: 00 00 35: e9 dc fa ff ff jmp 0xfffffffffffffb16 3a: 84 c9 test %cl,%cl 3c: 0f .byte 0xf 3d: 84 4b f9 test %cl,-0x7(%rbx) Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 48 c7 44 24 38 00 00 movq $0x0,0x38(%rsp) 9: 00 00 b: e9 dc fa ff ff jmp 0xfffffffffffffaec 10: 84 c9 test %cl,%cl 12: 0f .byte 0xf 13: 84 4b f9 test %cl,-0x7(%rbx) [ 69.203065][ C0] RSP: 0018:ffffc90000007ac0 EFLAGS: 00010282 [ 69.203373][ C0] RAX: 00000000fffffff2 RBX: ffff8880364d85f4 RCX: 0000000000000004 [ 69.203745][ C0] RDX: dffffc0000000000 RSI: 1ffff110008ef439 RDI: ffff88800477a1c8 [ 69.204122][ C0] RBP: ffffc90000007b40 R08: 0000000000000014 R09: ffff8880364d863c [ 69.204501][ C0] R10: ffff8880364d8640 R11: ffff8880364d8640 R12: ffff8880364d8580 [ 69.204878][ C0] R13: 0000000000000100 R14: 0000000000000000 R15: ffff8880364d8632 [ 69.205236][ C0] FS: 0000000000000000(0000) GS:ffff88802f800000(0000) knlGS:0000000000000000 [ 69.205659][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 69.205976][ C0] CR2: 00007f708370d920 CR3: 0000000005566002 CR4: 0000000000770ef0 [ 69.206361][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 69.206712][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 69.207054][ C0] PKRU: 55555554 [ 69.207239][ C0] Call Trace: [ 69.207429][ C0] [ 69.207550][ C0] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) [ 69.207746][ C0] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) [ 69.207934][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 69.208191][ C0] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) [ 69.208432][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 69.208688][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 69.208934][ C0] ? handle_invalid_op (arch/x86/kernel/traps.c:213) [ 69.209194][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 69.209451][ C0] ? exc_invalid_op (arch/x86/kernel/traps.c:265) [ 69.209706][ C0] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 69.209957][ C0] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 69.210203][ C0] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 69.210456][ C0] tcp_v4_early_demux (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/tcp_ipv4.c:1966) [ 69.210721][ C0] ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:2943 ./include/linux/ip.h:21 net/ipv4/ip_input.c:344) [ 69.211036][ C0] ip_rcv (net/ipv4/ip_input.c:448 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) [ 69.211219][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 69.211481][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 69.211717][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 69.211972][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 69.212212][ C0] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) [ 69.212526][ C0] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) [ 69.212851][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 69.213091][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 69.213347][ C0] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) [ 69.213583][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 69.213839][ C0] __napi_poll.constprop.0 (net/core/dev.c:6703) [ 69.214097][ C0] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) [ 69.214361][ C0] ? __pfx_net_rx_action (net/core/dev.c:6850) [ 69.214600][ C0] ? hlock_class (kernel/locking/lockdep.c:223) [ 69.214851][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 69.215105][ C0] ? hrtimer_interrupt (kernel/time/hrtimer.c:1828) [ 69.215358][ C0] __do_softirq (kernel/softirq.c:553) [ 69.215603][ C0] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) [ 69.215855][ C0] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) [ 69.216033][ C0] [ 69.216161][ C0] [ 69.216290][ C0] __local_bh_enable_ip (kernel/softirq.c:381) [ 69.216528][ C0] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) [ 69.216778][ C0] __dev_queue_xmit (net/core/dev.c:4400) [ 69.217030][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 69.217260][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 69.217547][ C0] ? __pfx___dev_queue_xmit (net/core/dev.c:4281) [ 69.217783][ C0] ip_finish_output2 (./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) [ 69.218045][ C0] ? __pfx_mptcp_established_options (net/mptcp/options.c:828) [ 69.218370][ C0] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) [ 69.218619][ C0] ? __ip_finish_output (./include/linux/skbuff.h:1624 ./include/linux/skbuff.h:4942 net/ipv4/ip_output.c:307 net/ipv4/ip_output.c:295) [ 69.218853][ C0] __ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4)) [ 69.219090][ C0] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) [ 69.219324][ C0] ? __alloc_skb (net/core/skbuff.c:688) [ 69.219556][ C0] ? __pfx___tcp_transmit_skb (net/ipv4/tcp_output.c:1283) [ 69.219788][ C0] ? __tcp_send_ack.part.0 (./include/linux/skbuff.h:1301 net/ipv4/tcp_output.c:4206) [ 69.220020][ C0] tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6482) [ 69.220303][ C0] ? hlock_class (./arch/x86/include/asm/bitops.h:227 ./arch/x86/include/asm/bitops.h:239 ./include/asm-generic/bitops/instrumented-non-atomic.h:142 kernel/locking/lockdep.c:228) [ 69.220541][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 69.220723][ C0] ? __pfx_tcp_rcv_synsent_state_process (net/ipv4/tcp_input.c:6336) [ 69.221033][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 69.221351][ C0] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) [ 69.221595][ C0] ? ktime_get (kernel/time/timekeeping.c:195 (discriminator 4) kernel/time/timekeeping.c:289 (discriminator 4) kernel/time/timekeeping.c:388 (discriminator 4) kernel/time/timekeeping.c:848 (discriminator 4)) [ 69.221777][ C0] tcp_rcv_state_process (net/ipv4/tcp_input.c:6669) [ 69.222009][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) [ 69.222236][ C0] ? __release_sock (./include/net/sock.h:1106 net/core/sock.c:2984) [ 69.222470][ C0] ? __pfx_tcp_rcv_state_process (net/ipv4/tcp_input.c:6624) [ 69.222754][ C0] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 69.222927][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 69.223168][ C0] tcp_v4_do_rcv (net/ipv4/tcp_ipv4.c:1929) [ 69.223400][ C0] __release_sock (./include/net/sock.h:1106 net/core/sock.c:2984) [ 69.223632][ C0] release_sock (net/core/sock.c:3552) [ 69.223866][ C0] inet_stream_connect (net/ipv4/af_inet.c:752) [ 69.224119][ C0] kernel_connect (net/socket.c:3625) [ 69.224371][ C0] ? __pfx_kernel_connect (net/socket.c:3620) [ 69.224615][ C0] ? mptcp_crypto_key_sha (net/mptcp/crypto.c:38) [ 69.224868][ C0] ? __pfx_mptcp_crypto_key_sha (net/mptcp/crypto.c:32) [ 69.225105][ C0] ? net_generic (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/net/netns/generic.h:48) [ 69.225356][ C0] ? mptcp_pm_nl_get_flags_and_ifindex_by_id (net/mptcp/pm_netlink.c:1367) [ 69.225661][ C0] __mptcp_subflow_connect (net/mptcp/subflow.c:1578) [ 69.225913][ C0] ? __pfx___mptcp_subflow_connect (net/mptcp/subflow.c:1518) [ 69.226236][ C0] ? fill_remote_addresses_vec (net/mptcp/pm_netlink.c:418) [ 69.226556][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 69.226803][ C0] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 69.227076][ C0] mptcp_pm_create_subflow_or_signal_addr (net/mptcp/pm_netlink.c:600 (discriminator 3)) [ 69.227379][ C0] ? __pfx_mptcp_pm_create_subflow_or_signal_addr (net/mptcp/pm_netlink.c:514) [ 69.227746][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 69.227986][ C0] ? mptcp_pm_nl_work (./arch/x86/include/asm/jump_label.h:27 net/mptcp/pm_netlink.c:857) [ 69.228241][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 69.228504][ C0] ? do_raw_spin_lock (./arch/x86/include/asm/atomic.h:115 ./include/linux/atomic/atomic-arch-fallback.h:2164 ./include/linux/atomic/atomic-instrumented.h:1296 ./include/asm-generic/qspinlock.h:111 kernel/locking/spinlock_debug.c:116) [ 69.228745][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 69.228997][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 69.229233][ C0] ? mptcp_pm_nl_work (./arch/x86/include/asm/jump_label.h:27 net/mptcp/pm_netlink.c:857) [ 69.229490][ C0] mptcp_pm_nl_work (net/mptcp/pm_netlink.c:874) [ 69.229727][ C0] ? mptcp_worker (net/mptcp/protocol.c:2737) [ 69.229983][ C0] mptcp_worker (net/mptcp/protocol.c:2745) [ 69.230241][ C0] ? __pfx_mptcp_worker (net/mptcp/protocol.c:2730) [ 69.230485][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 69.230742][ C0] ? process_one_work (kernel/workqueue.c:2609) [ 69.230979][ C0] process_one_work (kernel/workqueue.c:2633) [ 69.231233][ C0] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 69.231472][ C0] ? __pfx_process_one_work (kernel/workqueue.c:2542) [ 69.231725][ C0] ? assign_work (kernel/workqueue.c:1101) [ 69.231979][ C0] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 69.232224][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 69.232536][ C0] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 69.232775][ C0] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 69.233030][ C0] kthread (kernel/kthread.c:388) [ 69.233225][ C0] ? __pfx_kthread (kernel/kthread.c:341) [ 69.233474][ C0] ret_from_fork (arch/x86/kernel/process.c:147) [ 69.233717][ C0] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: __pskb_pull_tail:tcp_v4_early_demux:ip_rcv:__netif_receive_skb_one_core