======================================
| [ 50.047838][ T429] br2: port 2(vx100) entered forwarding state
| [ 50.213077][ C2] ------------[ cut here ]------------
| [ 50.213523][ C2] kernel BUG at net/core/skbuff.c:3505!
| [ 50.214048][ C2] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[ 50.214651][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 50.215128][ C2] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 50.215358][ C2] 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
[ 50.216106][ C2] RSP: 0018:ffffc90000220888 EFLAGS: 00010202
[ 50.216376][ C2] RAX: 000000000000f261 RBX: 0000000000000008 RCX: 1ffff1100708c1c9
[ 50.216694][ C2] RDX: 0000000000000092 RSI: dffffc0000000000 RDI: ffff888038460e48
[ 50.217012][ C2] RBP: 000000000000f261 R08: 0000000000000008 R09: ffffed100091d2e9
[ 50.217328][ C2] R10: ffff8880081b8d08 R11: ffff888038460d40 R12: 0000000000000008
[ 50.217645][ C2] R13: 0000000000000000 R14: ffffc90000220948 R15: ffff8880081b8d08
[ 50.217960][ C2] FS: 0000000000000000(0000) GS:ffff88802fb00000(0000) knlGS:0000000000000000
[ 50.218323][ C2] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 50.218594][ C2] CR2: 000055603ca23dec CR3: 0000000005394001 CR4: 0000000000770ef0
[ 50.218912][ C2] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 50.219225][ C2] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 50.219544][ C2] PKRU: 55555554
[ 50.219702][ C2] Call Trace:
[ 50.219865][ C2]
[ 50.219973][ C2] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447)
[ 50.220138][ C2] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154)
[ 50.220302][ C2] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 50.220523][ C2] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175)
[ 50.220733][ C2] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 50.220945][ C2] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 50.221162][ C2] ? handle_invalid_op (arch/x86/kernel/traps.c:213)
[ 50.221373][ C2] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 50.221584][ C2] ? exc_invalid_op (arch/x86/kernel/traps.c:265)
[ 50.221795][ C2] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568)
[ 50.222016][ C2] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 50.222226][ C2] ? __skb_checksum (net/core/skbuff.c:3441 (discriminator 4))
[ 50.222436][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 50.222649][ C2] ? 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)
[ 50.222864][ C2] __skb_checksum_complete (net/core/skbuff.c:3643)
[ 50.223077][ C2] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637)
[ 50.223335][ C2] ? __pfx_csum_partial_ext (./include/net/checksum.h:120)
[ 50.223543][ C2] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103)
[ 50.223759][ C2] ? ipv6_raw_deliver (net/ipv6/raw.c:142)
[ 50.223974][ C2] icmpv6_rcv (./include/linux/skbuff.h:4567 net/ipv6/icmp.c:921)
[ 50.224185][ C2] ip6_protocol_deliver_rcu (net/ipv6/ip6_input.c:438 (discriminator 5))
[ 50.224395][ C2] ? ip6_route_input (./include/linux/skbuff.h:1168 net/ipv6/route.c:2594)
[ 50.224608][ C2] ip6_input_finish (./include/linux/rcupdate.h:779 net/ipv6/ip6_input.c:484)
[ 50.224823][ C2] ip6_input (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:492)
[ 50.224981][ C2] ? __pfx_ip6_input (net/ipv6/ip6_input.c:491)
[ 50.225192][ C2] ? ip6_rcv_core (./include/linux/skbuff.h:3181 net/ipv6/ip6_input.c:291)
[ 50.225403][ C2] ipv6_rcv (./include/net/dst.h:460 net/ipv6/ip6_input.c:79 ./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv6/ip6_input.c:310)
[ 50.225566][ C2] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304)
[ 50.225779][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 50.225989][ C2] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051)
[ 50.226202][ C2] ? __pfx_ipv6_rcv (net/ipv6/ip6_input.c:304)
[ 50.226409][ C2] __netif_receive_skb_one_core (net/core/dev.c:5603)
[ 50.226673][ C2] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603)
[ 50.226934][ C2] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 50.227145][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725)
[ 50.227359][ C2] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051)
[ 50.227573][ C2] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053)
[ 50.227785][ C2] __napi_poll.constprop.0 (net/core/dev.c:6703)
[ 50.227995][ C2] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886)
[ 50.228208][ C2] ? __pfx_net_rx_action (net/core/dev.c:6850)
[ 50.228419][ C2] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86)
[ 50.228627][ C2] ? ktime_get (./include/linux/seqlock.h:72 kernel/time/timekeeping.c:846)
[ 50.228788][ C2] ? hrtimer_interrupt (kernel/time/hrtimer.c:1828)
[ 50.229001][ C2] ? clockevents_program_event (kernel/time/clockevents.c:334 (discriminator 3))
[ 50.229267][ C2] __do_softirq (kernel/softirq.c:553)
[ 50.229480][ C2] irq_exit_rcu (kernel/softirq.c:427 kernel/softirq.c:632 kernel/softirq.c:644)
[ 50.229638][ C2] sysvec_apic_timer_interrupt (arch/x86/kernel/apic/apic.c:1076 (discriminator 14))
[ 50.229851][ C2]
[ 50.229957][ C2]
[ 50.230063][ C2] asm_sysvec_apic_timer_interrupt (./arch/x86/include/asm/idtentry.h:649)
[ 50.230323][ C2] RIP: 0010:default_idle (./arch/x86/include/asm/irqflags.h:37 ./arch/x86/include/asm/irqflags.h:72 arch/x86/kernel/process.c:743)
[ 50.230548][ C2] Code: 4c 01 c7 4c 29 c2 e9 72 ff ff ff 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 f3 0f 1e fa 66 90 0f 00 2d 73 a4 3e 00 fb f4 c3 cc cc cc cc 66 66 2e 0f 1f 84 00 00 00 00 00 90 90 90 90 90
All code
========
0: 4c 01 c7 add %r8,%rdi
3: 4c 29 c2 sub %r8,%rdx
6: e9 72 ff ff ff jmp 0xffffffffffffff7d
b: 90 nop
c: 90 nop
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
16: 90 nop
17: 90 nop
18: 90 nop
19: 90 nop
1a: 90 nop
1b: f3 0f 1e fa endbr64
1f: 66 90 xchg %ax,%ax
21: 0f 00 2d 73 a4 3e 00 verw 0x3ea473(%rip) # 0x3ea49b
28: fb sti
29: f4 hlt
2a:* fa cli <-- trapping instruction
2b: c3 ret
2c: cc int3
2d: cc int3
2e: cc int3
2f: cc int3
30: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
37: 00 00 00 00
3b: 90 nop
3c: 90 nop
3d: 90 nop
3e: 90 nop
3f: 90 nop
Code starting with the faulting instruction
===========================================
0: fa cli
1: c3 ret
2: cc int3
3: cc int3
4: cc int3
5: cc int3
6: 66 66 2e 0f 1f 84 00 data16 cs nopw 0x0(%rax,%rax,1)
d: 00 00 00 00
11: 90 nop
12: 90 nop
13: 90 nop
14: 90 nop
15: 90 nop
[ 50.231292][ C2] RSP: 0018:ffffc9000014fdf8 EFLAGS: 00000242
[ 50.231557][ C2] RAX: 000000000014cef1 RBX: 1ffff92000029fc1 RCX: ffffffffb9676802
[ 50.231872][ C2] RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffffb7097aa6
[ 50.232193][ C2] RBP: 0000000000000000 R08: 0000000000000001 R09: ffffed1005f66e64
[ 50.232508][ C2] R10: ffff88802fb37323 R11: ffff88802fb3bec0 R12: 0000000000000000
[ 50.232822][ C2] R13: ffff888001b622c0 R14: dffffc0000000000 R15: 0000000000000000
[ 50.233143][ C2] ? ct_kernel_exit.constprop.0 (kernel/context_tracking.c:147)
[ 50.233356][ C2] ? cpuidle_idle_call (kernel/sched/idle.c:171)
[ 50.233570][ C2] default_idle_call (./include/linux/cpuidle.h:143 kernel/sched/idle.c:98)
[ 50.233786][ C2] cpuidle_idle_call (kernel/sched/idle.c:171)
[ 50.233997][ C2] ? __pfx_cpuidle_idle_call (kernel/sched/idle.c:147)
[ 50.234208][ C2] ? tsc_verify_tsc_adjust (arch/x86/kernel/tsc_sync.c:59)
[ 50.234421][ C2] do_idle (kernel/sched/idle.c:312)
[ 50.234578][ C2] cpu_startup_entry (kernel/sched/idle.c:409 (discriminator 1))
[ 50.234786][ C2] start_secondary (arch/x86/kernel/smpboot.c:224 arch/x86/kernel/smpboot.c:304)
[ 50.234996][ C2] ? __pfx_start_secondary (arch/x86/kernel/smpboot.c:254)
Finger prints:
__skb_checksum:__skb_checksum_complete:icmpv6_rcv:ip6_protocol_deliver_rcu