====================================== | [ 52.291371] ip_gre: GRE over IPv4 tunneling driver | [ 52.326476] ------------[ cut here ]------------ | [ 52.326530] kernel BUG at net/core/skbuff.c:3505! | [ 52.326578] invalid opcode: 0000 [#1] PREEMPT SMP NOPTI [ 52.326669] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 52.326731] Workqueue: mld mld_ifc_work [ 52.326762] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 52.326795] Code: 89 5c 24 04 44 89 d9 44 89 ff 44 89 ea ff d0 0f 1f 00 44 8b 5c 24 04 41 89 c7 eb b6 ff d0 0f 1f 00 41 89 c1 e9 71 fd ff ff 90 <0f> 0b 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90 90 90 90 90 All code ======== 0: 89 5c 24 04 mov %ebx,0x4(%rsp) 4: 44 89 d9 mov %r11d,%ecx 7: 44 89 ff mov %r15d,%edi a: 44 89 ea mov %r13d,%edx d: ff d0 call *%rax f: 0f 1f 00 nopl (%rax) 12: 44 8b 5c 24 04 mov 0x4(%rsp),%r11d 17: 41 89 c7 mov %eax,%r15d 1a: eb b6 jmp 0xffffffffffffffd2 1c: ff d0 call *%rax 1e: 0f 1f 00 nopl (%rax) 21: 41 89 c1 mov %eax,%r9d 24: e9 71 fd ff ff jmp 0xfffffffffffffd9a 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) 33: 00 00 00 00 37: 90 nop 38: 90 nop 39: 90 nop 3a: 90 nop 3b: 90 nop 3c: 90 nop 3d: 90 nop 3e: 90 nop 3f: 90 nop Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1) 9: 00 00 00 00 d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 90 nop 15: 90 nop [ 52.326897] RSP: 0018:ffffc0ec00114db0 EFLAGS: 00010206 [ 52.326930] RAX: 0000000000000072 RBX: 0000000000000008 RCX: ffffa0e242653100 [ 52.326977] RDX: ffffa0e241ea2e00 RSI: 0000000000000100 RDI: ffffa0e241ea2d00 [ 52.327018] RBP: ffffc0ec00114e08 R08: ffffc0ec00114e08 R09: 000000002bba0303 [ 52.327060] R10: 0000000000000008 R11: ffffa0e24252c480 R12: ffffa0e243912e80 [ 52.327101] R13: 0000000000000008 R14: 0000000000000000 R15: 000000002bba0303 [ 52.327144] FS: 0000000000000000(0000) GS:ffffa0e27ed00000(0000) knlGS:0000000000000000 [ 52.327190] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 52.327230] CR2: 00007fc879aaf1b4 CR3: 0000000037044005 CR4: 0000000000770ef0 [ 52.327272] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 52.327318] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 52.327359] PKRU: 55555554 [ 52.327373] Call Trace: [ 52.327390] [ 52.327407] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) [ 52.327434] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) [ 52.327459] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 52.327486] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) [ 52.327512] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 52.327538] ? exc_invalid_op (arch/x86/kernel/traps.c:265) [ 52.327565] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 52.327591] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 52.327619] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 52.327645] __skb_checksum_complete (./arch/x86/include/asm/checksum_64.h:170 ./arch/x86/include/asm/checksum_64.h:180 net/core/skbuff.c:3643) [ 52.327678] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) [ 52.327712] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) [ 52.327745] icmp_rcv (./include/linux/skbuff.h:4567 net/ipv4/icmp.c:1213) [ 52.327773] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5)) [ 52.327807] ip_local_deliver_finish (./include/linux/rcupdate.h:782 net/ipv4/ip_input.c:234) [ 52.327838] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) [ 52.327873] process_backlog (./include/linux/rcupdate.h:782 net/core/dev.c:6053) [ 52.327898] __napi_poll (net/core/dev.c:6703) [ 52.327926] net_rx_action (net/core/dev.c:6774 net/core/dev.c:6886) [ 52.327951] __do_softirq (kernel/softirq.c:553) [ 52.327979] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) [ 52.328007] [ 52.328020] [ 52.328034] __local_bh_enable_ip (kernel/softirq.c:381) [ 52.328060] __dev_queue_xmit (net/core/dev.c:4400) [ 52.328087] ? eth_header (net/ethernet/eth.c:85) [ 52.328114] ip6_finish_output2 (./include/net/neighbour.h:542 net/ipv6/ip6_output.c:137) [ 52.328144] ip6_finish_output (net/ipv6/ip6_output.c:211 net/ipv6/ip6_output.c:222) [ 52.328168] mld_sendpack (net/ipv6/mcast.c:1822) [ 52.328197] mld_ifc_work (net/ipv6/mcast.c:2652) [ 52.328221] process_one_work (kernel/workqueue.c:2633) [ 52.328247] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 52.328280] worker_thread (kernel/workqueue.c:2700 kernel/workqueue.c:2787) [ 52.328301] ? __pfx_worker_thread (kernel/workqueue.c:2733) [ 52.328335] kthread (kernel/kthread.c:388) [ 52.328355] ? __pfx_kthread (kernel/kthread.c:341) [ 52.328376] ret_from_fork (arch/x86/kernel/process.c:147) [ 52.328403] ? __pfx_kthread (kernel/kthread.c:341) Finger prints: __skb_checksum:__skb_checksum_complete:icmp_rcv:ip_protocol_deliver_rcu