====================================== | [ 166.845625][ T62] br0: port 2(veth2) entered forwarding state | [ 173.445451][ C3] ------------[ cut here ]------------ | [ 173.445788][ C3] kernel BUG at net/core/skbuff.c:3505! | [ 173.445977][ C3] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 173.446402][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 173.446739][ C3] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 173.446900][ C3] Code: 44 89 14 24 ff d0 0f 1f 00 4c 8b 44 24 08 44 8b 14 24 41 89 c1 eb a5 89 e8 e9 2d fe ff ff 41 ff d5 0f 1f 00 e9 1f fa ff ff 90 <0f> 0b 48 8b 7c 24 10 89 54 24 48 48 89 44 24 40 e8 17 a6 91 fe 8b All code ======== 0: 44 89 14 24 mov %r10d,(%rsp) 4: ff d0 call *%rax 6: 0f 1f 00 nopl (%rax) 9: 4c 8b 44 24 08 mov 0x8(%rsp),%r8 e: 44 8b 14 24 mov (%rsp),%r10d 12: 41 89 c1 mov %eax,%r9d 15: eb a5 jmp 0xffffffffffffffbc 17: 89 e8 mov %ebp,%eax 19: e9 2d fe ff ff jmp 0xfffffffffffffe4b 1e: 41 ff d5 call *%r13 21: 0f 1f 00 nopl (%rax) 24: e9 1f fa ff ff jmp 0xfffffffffffffa48 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 48 8b 7c 24 10 mov 0x10(%rsp),%rdi 31: 89 54 24 48 mov %edx,0x48(%rsp) 35: 48 89 44 24 40 mov %rax,0x40(%rsp) 3a: e8 17 a6 91 fe call 0xfffffffffe91a656 3f: 8b .byte 0x8b Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 48 8b 7c 24 10 mov 0x10(%rsp),%rdi 7: 89 54 24 48 mov %edx,0x48(%rsp) b: 48 89 44 24 40 mov %rax,0x40(%rsp) 10: e8 17 a6 91 fe call 0xfffffffffe91a62c 15: 8b .byte 0x8b [ 173.447427][ C3] RSP: 0018:ffffc90000278920 EFLAGS: 00010202 [ 173.447615][ C3] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 1ffff11000c5a891 [ 173.447833][ C3] RDX: 0000000000000040 RSI: 0000000000000000 RDI: ffff8880062d4488 [ 173.448053][ C3] RBP: 0000000000000000 R08: ffffc900002789e0 R09: fffffbfff509c5ea [ 173.448275][ C3] R10: ffffffffa84e2f57 R11: dffffc0000000000 R12: 0000000000000000 [ 173.448499][ C3] R13: 0000000000000000 R14: ffffc900002789e0 R15: ffff88802dac0608 [ 173.448720][ C3] FS: 00007fa016338300(0000) GS:ffff888036180000(0000) knlGS:0000000000000000 [ 173.448982][ C3] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 173.449168][ C3] CR2: 0000000000407181 CR3: 0000000002e4e001 CR4: 0000000000770ef0 [ 173.449394][ C3] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 173.449618][ C3] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 173.449838][ C3] PKRU: 55555554 [ 173.449950][ C3] Call Trace: [ 173.450068][ C3] [ 173.450145][ C3] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) [ 173.450260][ C3] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) [ 173.450376][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 173.450527][ C3] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) [ 173.450677][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 173.450826][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 173.450973][ C3] ? handle_invalid_op (arch/x86/kernel/traps.c:213) [ 173.451121][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 173.451271][ C3] ? exc_invalid_op (arch/x86/kernel/traps.c:265) [ 173.451423][ C3] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 173.451591][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 173.451741][ C3] __skb_checksum_complete (net/core/skbuff.c:3643) [ 173.451890][ C3] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637) [ 173.452079][ C3] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) [ 173.452232][ C3] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) [ 173.452381][ C3] icmp_rcv (./include/linux/skbuff.h:4567 net/ipv4/icmp.c:1213) [ 173.452498][ C3] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5)) [ 173.452651][ C3] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) [ 173.452798][ C3] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) [ 173.452946][ C3] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) [ 173.453098][ C3] ? ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:1136 ./include/linux/skbuff.h:1188 net/ipv4/ip_input.c:390) [ 173.453284][ C3] ip_rcv (./include/net/dst.h:460 net/ipv4/ip_input.c:449 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:569) [ 173.453396][ C3] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 173.453548][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 173.453698][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 173.453851][ C3] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 173.454006][ C3] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) [ 173.454190][ C3] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) [ 173.454380][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 173.454528][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 173.454683][ C3] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) [ 173.454829][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 173.454982][ C3] __napi_poll.constprop.0 (net/core/dev.c:6703) [ 173.455129][ C3] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) [ 173.455285][ C3] ? __pfx_net_rx_action (net/core/dev.c:6850) [ 173.455430][ C3] ? hlock_class (kernel/locking/lockdep.c:223) [ 173.455577][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 173.455724][ C3] ? hrtimer_interrupt (kernel/time/hrtimer.c:1828) [ 173.455875][ C3] __do_softirq (kernel/softirq.c:553) [ 173.456022][ C3] ? __neigh_event_send (./include/linux/bottom_half.h:33 net/core/neighbour.c:1245) [ 173.456170][ C3] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) [ 173.456281][ C3] [ 173.456357][ C3] [ 173.456433][ C3] __local_bh_enable_ip (kernel/softirq.c:381) [ 173.456583][ C3] __neigh_event_send (./arch/x86/include/asm/jump_label.h:27 ./include/linux/jump_label.h:207 ./include/trace/events/neigh.h:237 net/core/neighbour.c:1246) [ 173.456737][ C3] neigh_resolve_output (net/core/neighbour.c:1547) [ 173.456884][ C3] ? __local_bh_enable_ip (./arch/x86/include/asm/irqflags.h:42 ./arch/x86/include/asm/irqflags.h:77 kernel/softirq.c:386) [ 173.457033][ C3] ? ___neigh_create (net/core/neighbour.c:722 (discriminator 9)) [ 173.457182][ C3] ip_finish_output2 (./include/net/neighbour.h:542 net/ipv4/ip_output.c:235) [ 173.457327][ C3] ? __pfx_get_random_u32 (drivers/char/random.c:532) [ 173.457477][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 173.457622][ C3] ? __pfx_raw_getfrag (net/ipv4/raw.c:446) [ 173.457771][ C3] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) [ 173.457919][ C3] ? __pfx_vrf_ip_out_direct_finish (drivers/net/vrf.c:972) vrf [ 173.458112][ C3] ? __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) [ 173.458261][ C3] ip_output (./include/linux/netfilter.h:303 net/ipv4/ip_output.c:433) [ 173.458373][ C3] ? __ip_local_out (./include/net/l3mdev.h:203 ./include/net/l3mdev.h:213 net/ipv4/ip_output.c:112) [ 173.458518][ C3] ? __pfx_ip_output (net/ipv4/ip_output.c:427) [ 173.458665][ C3] ? __ip_make_skb (net/ipv4/ip_output.c:1379 net/ipv4/ip_output.c:1487) [ 173.458813][ C3] ? __pfx_raw_getfrag (net/ipv4/raw.c:446) [ 173.458958][ C3] ? ip_append_data (net/ipv4/ip_output.c:1368 net/ipv4/ip_output.c:1347) [ 173.459107][ C3] ip_push_pending_frames (./include/net/dst.h:450 net/ipv4/ip_output.c:129 net/ipv4/ip_output.c:1496 net/ipv4/ip_output.c:1516) [ 173.459258][ C3] raw_sendmsg (net/ipv4/raw.c:648) [ 173.459403][ C3] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 173.459552][ C3] ? __pfx_raw_sendmsg (net/ipv4/raw.c:476) [ 173.459701][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 173.459851][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 173.459997][ C3] ? __lock_release (kernel/locking/lockdep.c:5430) [ 173.460144][ C3] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 173.460293][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 173.460447][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 173.460593][ C3] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 173.460739][ C3] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 173.460887][ C3] ? __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) [ 173.461035][ C3] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) [ 173.461181][ C3] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 173.461329][ C3] ? __pfx___sys_sendto (net/socket.c:2161) [ 173.461481][ C3] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 173.461634][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 173.461784][ C3] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 173.461932][ C3] ? rseq_ip_fixup (kernel/rseq.c:257 kernel/rseq.c:291) [ 173.462080][ C3] ? __pfx_find_vma (mm/mmap.c:1883) [ 173.462231][ C3] ? __pfx___up_read (kernel/locking/rwsem.c:1339) [ 173.462379][ C3] ? __pfx_rseq_ip_fixup (kernel/rseq.c:275) [ 173.462529][ C3] __x64_sys_sendto (net/socket.c:2199) [ 173.462675][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 173.462858][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 173.463004][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 173.463194][ C3] RIP: 0033:0x7fa01660e85a [ 173.463350][ C3] Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb b8 0f 1f 00 f3 0f 1e fa 41 89 ca 64 8b 04 25 18 00 00 00 85 c0 75 15 b8 2c 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 7e c3 0f 1f 44 00 00 41 54 48 83 ec 30 44 89 All code ======== 0: d8 64 89 02 fsubs 0x2(%rcx,%rcx,4) 4: 48 c7 c0 ff ff ff ff mov $0xffffffffffffffff,%rax b: eb b8 jmp 0xffffffffffffffc5 d: 0f 1f 00 nopl (%rax) 10: f3 0f 1e fa endbr64 14: 41 89 ca mov %ecx,%r10d 17: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax 1e: 00 1f: 85 c0 test %eax,%eax 21: 75 15 jne 0x38 23: b8 2c 00 00 00 mov $0x2c,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 7e ja 0xb0 32: c3 ret 33: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 38: 41 54 push %r12 3a: 48 83 ec 30 sub $0x30,%rsp 3e: 44 rex.R 3f: 89 .byte 0x89 Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 7e ja 0x86 8: c3 ret 9: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) e: 41 54 push %r12 10: 48 83 ec 30 sub $0x30,%rsp 14: 44 rex.R 15: 89 .byte 0x89 [ 173.463869][ C3] RSP: 002b:00007ffd87266f38 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 173.464095][ C3] RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007fa01660e85a [ 173.464316][ C3] RDX: 0000000000000040 RSI: 0000000001b77340 RDI: 0000000000000005 [ 173.464537][ C3] RBP: 00007ffd87266f90 R08: 00000000004185e0 R09: 0000000000000010 [ 173.464760][ C3] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000054 Finger prints: __skb_checksum:__skb_checksum_complete:icmp_rcv:ip_protocol_deliver_rcu