====================================== | [ 16.270036] pm_nl_ctl (744) used greatest stack depth: 12152 bytes left | [ 31.723630] ------------[ cut here ]------------ | [ 31.723693] kernel BUG at net/core/skbuff.c:2813! | [ 31.723744] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 31.723843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 31.723945] Workqueue: events mptcp_worker [ 31.723980] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 31.724028] Code: 44 24 10 e8 ed 38 83 ff 49 8b be c0 00 00 00 44 8b 44 24 10 41 8b 8e bc 00 00 00 e9 f4 fc ff ff 4c 8d 48 ff e9 41 fd ff ff 90 <0f> 0b 48 c7 44 24 10 00 00 00 00 e9 99 fe ff ff 41 f6 44 24 7e 20 All code ======== 0: 44 24 10 rex.R and $0x10,%al 3: e8 ed 38 83 ff call 0xffffffffff8338f5 8: 49 8b be c0 00 00 00 mov 0xc0(%r14),%rdi f: 44 8b 44 24 10 mov 0x10(%rsp),%r8d 14: 41 8b 8e bc 00 00 00 mov 0xbc(%r14),%ecx 1b: e9 f4 fc ff ff jmp 0xfffffffffffffd14 20: 4c 8d 48 ff lea -0x1(%rax),%r9 24: e9 41 fd ff ff jmp 0xfffffffffffffd6a 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 48 c7 44 24 10 00 00 movq $0x0,0x10(%rsp) 33: 00 00 35: e9 99 fe ff ff jmp 0xfffffffffffffed3 3a: 41 f6 44 24 7e 20 testb $0x20,0x7e(%r12) Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 48 c7 44 24 10 00 00 movq $0x0,0x10(%rsp) 9: 00 00 b: e9 99 fe ff ff jmp 0xfffffffffffffea9 10: 41 f6 44 24 7e 20 testb $0x20,0x7e(%r12) [ 31.724192] RSP: 0018:ffffc1e800003dc8 EFLAGS: 00010282 [ 31.724245] RAX: 00000000fffffff2 RBX: 0000000000000014 RCX: 0000000000000014 [ 31.724299] RDX: ffffa0d601b42684 RSI: 0000000000000100 RDI: 0000000000000000 [ 31.724360] RBP: ffffc1e800003e08 R08: 00000000ffffffd8 R09: 0000000000000008 [ 31.724411] R10: ffffa0d602bee0c8 R11: 0000000000000020 R12: ffffa0d602bee000 [ 31.724477] R13: 0000000000000014 R14: ffffa0d601f17f00 R15: 0000000000000002 [ 31.724558] FS: 0000000000000000(0000) GS:ffffa0d63ec00000(0000) knlGS:0000000000000000 [ 31.724627] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 31.724687] CR2: 0000562c721dc530 CR3: 000000000ae44006 CR4: 0000000000770ef0 [ 31.724753] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 31.724827] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 31.724890] PKRU: 55555554 [ 31.724912] Call Trace: [ 31.724943] <IRQ> [ 31.724961] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) [ 31.725002] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) [ 31.725047] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 31.725075] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) [ 31.725108] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 31.725147] ? exc_invalid_op (arch/x86/kernel/traps.c:265) [ 31.725182] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 31.725223] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 31.725271] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 31.725295] ? __pskb_pull_tail (net/core/skbuff.c:2813) [ 31.725317] tcp_v4_early_demux (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/tcp_ipv4.c:1966) [ 31.725368] ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:1139 ./include/net/dst_metadata.h:94 net/ipv4/ip_input.c:364) [ 31.725419] ip_rcv (net/ipv4/ip_input.c:448 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) [ 31.725452] ? ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 1)) [ 31.725498] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) [ 31.725555] process_backlog (./include/linux/rcupdate.h:782 net/core/dev.c:6053) [ 31.725598] __napi_poll (net/core/dev.c:6703) [ 31.725628] net_rx_action (net/core/dev.c:6774 net/core/dev.c:6886) [ 31.725660] __do_softirq (kernel/softirq.c:553) [ 31.725709] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) [ 31.725750] </IRQ> [ 31.725776] <TASK> [ 31.725791] __local_bh_enable_ip (kernel/softirq.c:381) [ 31.725826] __dev_queue_xmit (net/core/dev.c:4400) [ 31.725852] ? ip6_dst_check (net/ipv6/route.c:2770) [ 31.725892] ? tcp_ack_update_rtt (./include/net/tcp.h:747 net/ipv4/tcp_input.c:990 net/ipv4/tcp_input.c:3169) [ 31.725942] ? __slab_free (mm/slub.c:4148) [ 31.725970] ip_finish_output2 (./include/linux/netdevice.h:3172 ./include/net/neighbour.h:526 ./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) [ 31.726012] __ip_queue_xmit (net/ipv4/ip_output.c:535) [ 31.726052] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) [ 31.726090] ? skb_release_data (net/core/skbuff.c:1153) [ 31.726131] tcp_write_xmit (net/ipv4/tcp_output.c:2792) [ 31.726174] __tcp_push_pending_frames (net/ipv4/tcp_output.c:2977) [ 31.726209] __tcp_close (net/ipv4/tcp.c:2842) [ 31.726247] __mptcp_close_ssk (./arch/x86/include/asm/atomic.h:103 ./include/linux/atomic/atomic-arch-fallback.h:949 ./include/linux/atomic/atomic-instrumented.h:401 ./include/linux/refcount.h:327 ./include/linux/refcount.h:348 ./include/net/sock.h:782 net/mptcp/protocol.c:2467) [ 31.726292] ? lock_timer_base (kernel/time/timer.c:999) [ 31.726338] mptcp_destroy_common (net/mptcp/protocol.c:3353) [ 31.726373] mptcp_destroy (./include/net/sock.h:1480 net/mptcp/protocol.c:3380) [ 31.726410] __mptcp_destroy_sock (net/mptcp/protocol.c:2999) [ 31.726445] mptcp_worker (net/mptcp/protocol.c:2759) [ 31.726479] process_one_work (kernel/workqueue.c:2633) [ 31.726527] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 31.726574] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 31.726612] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 31.726672] kthread (kernel/kthread.c:388) [ 31.726707] ? __pfx_kthread (kernel/kthread.c:341) [ 31.726746] ret_from_fork (arch/x86/kernel/process.c:147) [ 31.726783] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: __pskb_pull_tail:tcp_v4_early_demux:ip_rcv:__netif_receive_skb_one_core