======================================
| [ 36.483118][ T291] GACT probability NOT on
| [ 36.842944][ C1] ------------[ cut here ]------------
| [ 36.843477][ C1] kernel BUG at net/core/skbuff.c:3505!
| [ 36.843766][ C1] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
[ 36.844418][ C1] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014
[ 36.844932][ C1] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 36.845177][ C1] 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
[ 36.846000][ C1] RSP: 0018:ffffc900001c8920 EFLAGS: 00010202
[ 36.846290][ C1] RAX: 000000000000b7b7 RBX: 0000000000000008 RCX: 1ffff110006dbd71
[ 36.846632][ C1] RDX: 0000000000000054 RSI: dffffc0000000000 RDI: ffff8880036deb88
[ 36.846972][ C1] RBP: 000000000000b7b7 R08: 0000000000000008 R09: fffffbfff3b1c5ea
[ 36.847310][ C1] R10: ffffffff9d8e2f57 R11: dffffc0000000000 R12: 0000000000000008
[ 36.847660][ C1] R13: 0000000000000000 R14: ffffc900001c89e0 R15: ffff8880037a75c8
[ 36.847999][ C1] FS: 00007f8878ea3740(0000) GS:ffff888036080000(0000) knlGS:0000000000000000
[ 36.848394][ C1] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
[ 36.848681][ C1] CR2: 00007f88792f3ff8 CR3: 00000000034c0006 CR4: 0000000000770ef0
[ 36.849025][ C1] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
[ 36.849367][ C1] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
[ 36.849707][ C1] PKRU: 55555554
[ 36.849881][ C1] Call Trace:
[ 36.850055][ C1]
[ 36.850172][ C1] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447)
[ 36.850349][ C1] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154)
[ 36.850523][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 36.850752][ C1] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175)
[ 36.850984][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 36.851210][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 36.851441][ C1] ? handle_invalid_op (arch/x86/kernel/traps.c:213)
[ 36.851668][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 36.851896][ C1] ? exc_invalid_op (arch/x86/kernel/traps.c:265)
[ 36.852124][ C1] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568)
[ 36.852360][ C1] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1))
[ 36.852594][ C1] __skb_checksum_complete (net/core/skbuff.c:3643)
[ 36.852825][ C1] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637)
[ 36.853115][ C1] ? __pfx_csum_partial_ext (./include/net/checksum.h:120)
[ 36.853346][ C1] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103)
[ 36.853575][ C1] icmp_rcv (./include/linux/skbuff.h:4567 net/ipv4/icmp.c:1213)
[ 36.853753][ C1] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5))
[ 36.854007][ C1] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234)
[ 36.854238][ C1] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254)
[ 36.854467][ C1] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243)
[ 36.854703][ C1] ? ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:1136 ./include/linux/skbuff.h:1188 net/ipv4/ip_input.c:390)
[ 36.854989][ C1] 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)
[ 36.855161][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562)
[ 36.855392][ C1] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756)
[ 36.855620][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051)
[ 36.855851][ C1] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562)
[ 36.856076][ C1] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4))
[ 36.856361][ C1] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603)
[ 36.856648][ C1] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114)
[ 36.856877][ C1] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725)
[ 36.857104][ C1] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051)
[ 36.857336][ C1] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053)
[ 36.857573][ C1] __napi_poll.constprop.0 (net/core/dev.c:6703)
[ 36.857800][ C1] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886)
[ 36.858036][ C1] ? __pfx_net_rx_action (net/core/dev.c:6850)
[ 36.858271][ C1] __do_softirq (kernel/softirq.c:553)
[ 36.858505][ C1] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399)
[ 36.858733][ C1] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441)
[ 36.858908][ C1]
[ 36.859027][ C1]
[ 36.859144][ C1] __local_bh_enable_ip (kernel/softirq.c:381)
[ 36.859371][ C1] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399)
[ 36.859597][ C1] __dev_queue_xmit (net/core/dev.c:4400)
[ 36.859825][ C1] ? packet_parse_headers (./include/linux/skbuff.h:3007 net/packet/af_packet.c:1944)
[ 36.860052][ C1] ? packet_parse_headers (./include/linux/skbuff.h:3007 net/packet/af_packet.c:1944)
[ 36.860286][ C1] ? __pfx_sock_alloc_send_pskb (net/core/sock.c:2768)
[ 36.860515][ C1] ? __pfx___dev_queue_xmit (net/core/dev.c:4281)
[ 36.860751][ C1] ? dev_get_by_index (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/core/dev.c:888)
[ 36.860980][ C1] packet_snd (net/packet/af_packet.c:3083)
[ 36.861213][ C1] ? __pfx___lock_release (kernel/locking/lockdep.c:5406)
[ 36.861441][ C1] ? __pfx_packet_snd (net/packet/af_packet.c:2945)
[ 36.861667][ C1] ? get_user_pages_remote (./include/linux/mmap_lock.h:65 mm/gup.c:1490 mm/gup.c:2349)
[ 36.861903][ C1] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073)
[ 36.862141][ C1] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191)
[ 36.862370][ C1] ? __pfx___sys_sendto (net/socket.c:2161)
[ 36.862603][ C1] ? sock_ioctl (net/socket.c:1344)
[ 36.862832][ C1] ? rseq_ip_fixup (kernel/rseq.c:257 kernel/rseq.c:291)
[ 36.863063][ C1] ? __pfx_find_vma (mm/mmap.c:1883)
[ 36.863290][ C1] ? __pfx___up_read (kernel/locking/rwsem.c:1339)
[ 36.863517][ C1] ? __pfx_rseq_ip_fixup (kernel/rseq.c:275)
[ 36.863749][ C1] __x64_sys_sendto (net/socket.c:2199)
[ 36.864025][ C1] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359)
[ 36.864329][ C1] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83)
[ 36.864567][ C1] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129)
[ 36.864864][ C1] RIP: 0033:0x7f88790fd85a
[ 36.865116][ C1] 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
[ 36.865953][ C1] RSP: 002b:00007ffdfd2a5908 EFLAGS: 00000246 ORIG_RAX: 000000000000002c
[ 36.866303][ C1] RAX: ffffffffffffffda RBX: 00000000018cf9d0 RCX: 00007f88790fd85a
[ 36.866645][ C1] RDX: 0000000000000062 RSI: 00000000018cf5c2 RDI: 0000000000000005
[ 36.866984][ C1] RBP: 00000000018cf5c2 R08: 00007ffdfd2a5910 R09: 0000000000000014
[ 36.867327][ C1] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
Finger prints:
__skb_checksum:__skb_checksum_complete:icmp_rcv:ip_protocol_deliver_rcu