====================================== | | [ 195.979445][ C3] ------------[ cut here ]------------ | [ 195.979872][ C3] kernel BUG at net/core/skbuff.c:2813! | [ 195.980058][ C3] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 195.980475][ C3] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 195.980805][ C3] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 195.981002][ C3] Code: e9 52 f7 ff ff 48 8b 7c 24 38 be 02 00 00 00 e8 8e 9c ff ff 48 83 c4 58 31 c0 5b 41 5c 41 5d 41 5e 41 5f 5d c3 cc cc cc cc 90 <0f> 0b 48 c7 44 24 38 00 00 00 00 e9 dc fa ff ff 84 c9 0f 84 4b f9 All code ======== 0: e9 52 f7 ff ff jmp 0xfffffffffffff757 5: 48 8b 7c 24 38 mov 0x38(%rsp),%rdi a: be 02 00 00 00 mov $0x2,%esi f: e8 8e 9c ff ff call 0xffffffffffff9ca2 14: 48 83 c4 58 add $0x58,%rsp 18: 31 c0 xor %eax,%eax 1a: 5b pop %rbx 1b: 41 5c pop %r12 1d: 41 5d pop %r13 1f: 41 5e pop %r14 21: 41 5f pop %r15 23: 5d pop %rbp 24: c3 ret 25: cc int3 26: cc int3 27: cc int3 28: cc int3 29: 90 nop 2a:* 0f 0b ud2 <-- trapping instruction 2c: 48 c7 44 24 38 00 00 movq $0x0,0x38(%rsp) 33: 00 00 35: e9 dc fa ff ff jmp 0xfffffffffffffb16 3a: 84 c9 test %cl,%cl 3c: 0f .byte 0xf 3d: 84 4b f9 test %cl,-0x7(%rbx) Code starting with the faulting instruction =========================================== 0: 0f 0b ud2 2: 48 c7 44 24 38 00 00 movq $0x0,0x38(%rsp) 9: 00 00 b: e9 dc fa ff ff jmp 0xfffffffffffffaec 10: 84 c9 test %cl,%cl 12: 0f .byte 0xf 13: 84 4b f9 test %cl,-0x7(%rbx) [ 195.981534][ C3] RSP: 0018:ffffc90000278858 EFLAGS: 00010282 [ 195.981722][ C3] RAX: 00000000fffffff2 RBX: ffff88801457e974 RCX: 0000000000000004 [ 195.981948][ C3] RDX: dffffc0000000000 RSI: 1ffff11000b9f961 RDI: ffff888005cfcb08 [ 195.982170][ C3] RBP: ffffc900002788d8 R08: 0000000000000014 R09: ffff88801457e9bc [ 195.982392][ C3] R10: ffff88801457e9c0 R11: ffff88801457e9c0 R12: ffff88801457e900 [ 195.982615][ C3] R13: 0000000000000100 R14: 0000000000000000 R15: 1ffff9200004f137 [ 195.982836][ C3] FS: 00007f06c4f94740(0000) GS:ffff888036180000(0000) knlGS:0000000000000000 [ 195.983093][ C3] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 195.983281][ C3] CR2: 00007ff8deb67520 CR3: 000000000768e004 CR4: 0000000000770ef0 [ 195.983512][ C3] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 195.983735][ C3] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 195.983955][ C3] PKRU: 55555554 [ 195.984067][ C3] Call Trace: [ 195.984178][ C3] [ 195.984254][ C3] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) [ 195.984371][ C3] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) [ 195.984487][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 195.984638][ C3] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) [ 195.984785][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 195.984932][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 195.985081][ C3] ? handle_invalid_op (arch/x86/kernel/traps.c:213) [ 195.985228][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 195.985374][ C3] ? exc_invalid_op (arch/x86/kernel/traps.c:265) [ 195.985523][ C3] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 195.985675][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 195.985823][ C3] ? __pskb_pull_tail (net/core/skbuff.c:2813) [ 195.985973][ C3] tcp_v4_rcv (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 net/ipv4/tcp_ipv4.c:2181) [ 195.986124][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 195.986273][ C3] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 195.986424][ C3] ? raw_v4_input (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 net/ipv4/raw.c:189) [ 195.986573][ C3] ? __pfx_tcp_v4_rcv (net/ipv4/tcp_ipv4.c:2163) [ 195.986723][ C3] ? __pfx_raw_v4_input (net/ipv4/raw.c:165) [ 195.986873][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 195.987021][ C3] ? __pfx_stack_trace_consume_entry (kernel/stacktrace.c:83) [ 195.987207][ C3] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:207 (discriminator 8)) [ 195.987358][ C3] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) [ 195.987508][ C3] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) [ 195.987657][ C3] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) [ 195.987807][ C3] ? ip_rcv_finish_core.constprop.0 (./include/net/net_namespace.h:383 ./include/linux/netdevice.h:2654 net/ipv4/ip_input.c:372) [ 195.987993][ 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) [ 195.988104][ C3] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 195.988253][ C3] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 195.988402][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 195.988552][ C3] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 195.988698][ C3] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) [ 195.988884][ C3] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) [ 195.989069][ C3] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 195.989217][ C3] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 195.989365][ C3] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) [ 195.989525][ C3] __napi_poll.constprop.0 (net/core/dev.c:6703) [ 195.989673][ C3] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) [ 195.989825][ C3] ? __pfx_net_rx_action (net/core/dev.c:6850) [ 195.989974][ C3] ? usage_skip (kernel/locking/lockdep.c:2295 kernel/locking/lockdep.c:2263) [ 195.990124][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 195.990275][ C3] __do_softirq (kernel/softirq.c:553) [ 195.990425][ C3] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) [ 195.990575][ C3] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) [ 195.990691][ C3] [ 195.990770][ C3] [ 195.990844][ C3] __local_bh_enable_ip (kernel/softirq.c:381) [ 195.990992][ C3] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) [ 195.991140][ C3] __dev_queue_xmit (net/core/dev.c:4400) [ 195.991289][ C3] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 195.991438][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 195.991620][ C3] ? __pfx___dev_queue_xmit (net/core/dev.c:4281) [ 195.991767][ C3] ? neigh_hh_output (./include/linux/seqlock.h:74 ./include/linux/seqlock.h:772 ./include/net/neighbour.h:496) [ 195.991919][ C3] ip_finish_output2 (./include/net/neighbour.h:540 net/ipv4/ip_output.c:235) [ 195.992069][ C3] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) [ 195.992216][ 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) [ 195.992364][ C3] ip_output (./include/linux/netfilter.h:303 net/ipv4/ip_output.c:433) [ 195.992478][ C3] ? __pfx_ip_output (net/ipv4/ip_output.c:427) [ 195.992627][ C3] ? __pfx_lock_acquire.part.0 (kernel/locking/lockdep.c:5719) [ 195.992775][ C3] ? ip_local_out (./include/linux/skbuff.h:1136 ./include/net/dst.h:450 net/ipv4/ip_output.c:129) [ 195.992923][ C3] __ip_queue_xmit (net/ipv4/ip_output.c:535 (discriminator 4)) [ 195.993072][ C3] ? __skb_clone (./arch/x86/include/asm/atomic.h:53 (discriminator 4) ./include/linux/atomic/atomic-arch-fallback.h:992 (discriminator 4) ./include/linux/atomic/atomic-instrumented.h:436 (discriminator 4) net/core/skbuff.c:1605 (discriminator 4)) [ 195.993223][ C3] __tcp_transmit_skb (net/ipv4/tcp_output.c:1462 (discriminator 4)) [ 195.993375][ C3] ? __pfx___tcp_transmit_skb (net/ipv4/tcp_output.c:1283) [ 195.993539][ C3] ? tcp_call_bpf (./include/net/sock.h:1698 ./include/net/sock.h:1793 ./include/net/tcp.h:2632) [ 195.993692][ C3] tcp_connect (net/ipv4/tcp_output.c:1480 net/ipv4/tcp_output.c:4100) [ 195.993844][ C3] tcp_v4_connect (net/ipv4/tcp_ipv4.c:324) [ 195.993994][ C3] ? __pfx_tcp_v4_connect (net/ipv4/tcp_ipv4.c:202) [ 195.994142][ C3] ? mark_lock (kernel/locking/lockdep.c:4656 (discriminator 3)) [ 195.994257][ C3] __inet_stream_connect (net/ipv4/af_inet.c:678) [ 195.994405][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 195.994590][ C3] inet_stream_connect (net/ipv4/af_inet.c:750) [ 195.994738][ C3] __sys_connect (net/socket.c:2048 net/socket.c:2065) [ 195.994889][ C3] ? __pfx___sys_connect (net/socket.c:2055) [ 195.995039][ C3] ? __pfx___sys_setsockopt (net/socket.c:2324) [ 195.995189][ C3] ? __sys_socket (net/socket.c:497 net/socket.c:1715) [ 195.995338][ C3] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 195.995523][ C3] ? __pfx___sys_socket (net/socket.c:1702) [ 195.995673][ C3] __x64_sys_connect (net/socket.c:2072) [ 195.995822][ C3] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 195.995971][ C3] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 195.996156][ C3] RIP: 0033:0x7f06c50e63d7 [ 195.996311][ C3] Code: 0a 00 f7 d8 64 89 02 b8 ff ff ff ff eb bc 0f 1f 44 00 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2a 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 18 89 54 24 0c 48 89 34 24 89 All code ======== 0: 0a 00 or (%rax),%al 2: f7 d8 neg %eax 4: 64 89 02 mov %eax,%fs:(%rdx) 7: b8 ff ff ff ff mov $0xffffffff,%eax c: eb bc jmp 0xffffffffffffffca e: 0f 1f 44 00 00 nopl 0x0(%rax,%rax,1) 13: f3 0f 1e fa endbr64 17: 64 8b 04 25 18 00 00 mov %fs:0x18,%eax 1e: 00 1f: 85 c0 test %eax,%eax 21: 75 10 jne 0x33 23: b8 2a 00 00 00 mov $0x2a,%eax 28: 0f 05 syscall 2a:* 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax <-- trapping instruction 30: 77 51 ja 0x83 32: c3 ret 33: 48 83 ec 18 sub $0x18,%rsp 37: 89 54 24 0c mov %edx,0xc(%rsp) 3b: 48 89 34 24 mov %rsi,(%rsp) 3f: 89 .byte 0x89 Code starting with the faulting instruction =========================================== 0: 48 3d 00 f0 ff ff cmp $0xfffffffffffff000,%rax 6: 77 51 ja 0x59 8: c3 ret 9: 48 83 ec 18 sub $0x18,%rsp d: 89 54 24 0c mov %edx,0xc(%rsp) 11: 48 89 34 24 mov %rsi,(%rsp) 15: 89 .byte 0x89 [ 195.996836][ C3] RSP: 002b:00007ffdcbd1dec8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 195.997063][ C3] RAX: ffffffffffffffda RBX: 00000000000016ee RCX: 00007f06c50e63d7 [ 195.997286][ C3] RDX: 0000000000000010 RSI: 00007ffdcbd1df10 RDI: 0000000000000006 [ 195.997516][ C3] RBP: 0000000000000006 R08: 0000000000000001 R09: 0000000000000004 [ 195.997738][ C3] R10: 0000000000000000 R11: 0000000000000246 R12: 00007f06c4f946c0 Finger prints: __pskb_pull_tail:tcp_v4_rcv:ip_protocol_deliver_rcu:ip_local_deliver_finish