====================================== | [ 44.436450][ T397] GACT probability NOT on | [ 45.036353][ C3] ------------[ cut here ]------------ | [ 45.036789][ C3] kernel BUG at net/core/skbuff.c:3505! | [ 45.036968][ C3] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 45.037361][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 45.037675][ C3] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 45.037830][ 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 [ 45.038342][ C3] RSP: 0018:ffffc90000278920 EFLAGS: 00010202 [ 45.038525][ C3] RAX: 000000000000b7b7 RBX: 0000000000000008 RCX: 1ffff11000b266d9 [ 45.038742][ C3] RDX: 0000000000000054 RSI: dffffc0000000000 RDI: ffff8880059336c8 [ 45.038956][ C3] RBP: 000000000000b7b7 R08: 0000000000000008 R09: fffffbfff251c5ea [ 45.039168][ C3] R10: ffffffff928e2f57 R11: dffffc0000000000 R12: 0000000000000008 [ 45.039387][ C3] R13: 0000000000000000 R14: ffffc900002789e0 R15: ffff888007383948 [ 45.039598][ C3] FS: 00007fe3baa8d740(0000) GS:ffff888036180000(0000) knlGS:0000000000000000 [ 45.039844][ C3] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 45.040023][ C3] CR2: 00007fe3baeddff8 CR3: 0000000003f1e002 CR4: 0000000000770ef0 [ 45.040235][ C3] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 45.040450][ C3] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 45.040660][ C3] PKRU: 55555554 [ 45.040766][ C3] Call Trace: [ 45.040870][ C3] [ 45.040942][ C3] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) [ 45.041053][ C3] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) [ 45.041161][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 45.041303][ C3] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) [ 45.041443][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 45.041585][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 45.041727][ C3] ? handle_invalid_op (arch/x86/kernel/traps.c:213) [ 45.041868][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 45.042015][ C3] ? exc_invalid_op (arch/x86/kernel/traps.c:265) [ 45.042155][ C3] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 45.042300][ C3] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 45.042444][ C3] __skb_checksum_complete (net/core/skbuff.c:3643) [ 45.042585][ C3] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637) [ 45.042759][ C3] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) [ 45.042904][ C3] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) [ 45.043047][ C3] icmp_rcv (./include/linux/skbuff.h:4567 net/ipv4/icmp.c:1213) [ 45.043157][ C3] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5)) [ 45.043299][ C3] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) [ 45.043442][ C3] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) [ 45.043666][ C3] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) [ 45.043806][ C3] ? ip_rcv_finish_core.constprop.0 (./include/linux/skbuff.h:1136 ./include/linux/skbuff.h:1188 net/ipv4/ip_input.c:390) [ 45.043985][ 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) [ 45.044091][ C3] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 45.044313][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 45.044452][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 45.044592][ C3] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 45.044732][ C3] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) [ 45.044988][ C3] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) [ 45.045162][ C3] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 45.045305][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 45.045444][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 45.045666][ C3] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) [ 45.045812][ C3] __napi_poll.constprop.0 (net/core/dev.c:6703) [ 45.045952][ C3] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) [ 45.046093][ C3] ? __pfx_net_rx_action (net/core/dev.c:6850) [ 45.046315][ C3] __do_softirq (kernel/softirq.c:553) [ 45.046462][ C3] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) [ 45.046602][ C3] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) [ 45.046714][ C3] [ 45.046786][ C3] [ 45.046857][ C3] __local_bh_enable_ip (kernel/softirq.c:381) [ 45.047079][ C3] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) [ 45.047218][ C3] __dev_queue_xmit (net/core/dev.c:4400) [ 45.047361][ C3] ? packet_parse_headers (./include/linux/skbuff.h:3007 net/packet/af_packet.c:1944) [ 45.047499][ C3] ? packet_parse_headers (./include/linux/skbuff.h:3007 net/packet/af_packet.c:1944) [ 45.047722][ C3] ? __pfx_sock_alloc_send_pskb (net/core/sock.c:2768) [ 45.047874][ C3] ? __pfx___dev_queue_xmit (net/core/dev.c:4281) [ 45.048016][ C3] ? dev_get_by_index (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/core/dev.c:888) [ 45.048156][ C3] packet_snd (net/packet/af_packet.c:3083) [ 45.048379][ C3] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 45.048521][ C3] ? __pfx_packet_snd (net/packet/af_packet.c:2945) [ 45.048661][ C3] ? get_user_pages_remote (./include/linux/mmap_lock.h:65 mm/gup.c:1490 mm/gup.c:2349) [ 45.048802][ C3] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 45.049022][ C3] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) [ 45.049167][ C3] ? __pfx___sys_sendto (net/socket.c:2161) [ 45.049310][ C3] ? sock_ioctl (net/socket.c:1344) [ 45.049450][ C3] ? rseq_ip_fixup (kernel/rseq.c:257 kernel/rseq.c:291) [ 45.049590][ C3] ? __pfx_find_vma (mm/mmap.c:1883) [ 45.049811][ C3] ? __pfx___up_read (kernel/locking/rwsem.c:1339) [ 45.049951][ C3] ? __pfx_rseq_ip_fixup (kernel/rseq.c:275) [ 45.050092][ C3] __x64_sys_sendto (net/socket.c:2199) [ 45.050232][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 45.050487][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 45.050629][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 45.050804][ C3] RIP: 0033:0x7fe3bace785a [ 45.050949][ 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 [ 45.051615][ C3] RSP: 002b:00007ffc4ab91628 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 45.051912][ C3] RAX: ffffffffffffffda RBX: 00000000006c69d0 RCX: 00007fe3bace785a [ 45.052124][ C3] RDX: 0000000000000062 RSI: 00000000006c65c2 RDI: 0000000000000005 [ 45.052332][ C3] RBP: 00000000006c65c2 R08: 00007ffc4ab91630 R09: 0000000000000014 [ 45.052624][ C3] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 Finger prints: __skb_checksum:__skb_checksum_complete:icmp_rcv:ip_protocol_deliver_rcu