====================================== | [ 40.617512][ T308] veth2: entered promiscuous mode | [ 48.256001][ C2] ------------[ cut here ]------------ | [ 48.256348][ C2] kernel BUG at net/core/skbuff.c:2813! | [ 48.256529][ C2] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 48.256954][ C2] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 48.257290][ C2] RIP: 0010:__pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 48.257494][ C2] 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) [ 48.258012][ C2] RSP: 0018:ffffc900002209c8 EFLAGS: 00010282 [ 48.258203][ C2] RAX: 00000000fffffff2 RBX: ffff8880071c9af4 RCX: 0000000000000004 [ 48.258423][ C2] RDX: dffffc0000000000 RSI: 1ffff11000e57091 RDI: ffff8880072b8488 [ 48.258638][ C2] RBP: ffffc90000220a48 R08: 0000000000000008 R09: ffff8880071c9b3c [ 48.258855][ C2] R10: ffff8880071c9b40 R11: 6b6b6b6b6b6b6b6b R12: ffff8880071c9a80 [ 48.259072][ C2] R13: ffff8880072ba860 R14: 0000000000000001 R15: ffffffffbdfcddb0 [ 48.259290][ C2] FS: 00007fa290241300(0000) GS:ffff888036100000(0000) knlGS:0000000000000000 [ 48.259547][ C2] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 48.259772][ C2] CR2: 00007fffe4a5fd80 CR3: 000000000477c002 CR4: 0000000000770ef0 [ 48.260038][ C2] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 48.260299][ C2] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 48.260518][ C2] PKRU: 55555554 [ 48.260631][ C2] Call Trace: [ 48.260740][ C2] [ 48.260816][ C2] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) [ 48.260930][ C2] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) [ 48.261041][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 48.261189][ C2] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) [ 48.261332][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 48.261475][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 48.261622][ C2] ? handle_invalid_op (arch/x86/kernel/traps.c:213) [ 48.261764][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 48.261912][ C2] ? exc_invalid_op (arch/x86/kernel/traps.c:265) [ 48.262057][ C2] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 48.262250][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813 (discriminator 1)) [ 48.262423][ C2] ? __pskb_pull_tail (net/core/skbuff.c:2813) [ 48.262583][ C2] ? raw_v4_input (net/ipv4/raw.c:165) [ 48.262755][ C2] icmp_rcv (./include/linux/skbuff.h:2731 ./include/linux/skbuff.h:2739 ./include/linux/skbuff.h:2744 net/ipv4/icmp.c:1216) [ 48.262880][ C2] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5)) [ 48.263034][ C2] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) [ 48.263190][ C2] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) [ 48.263346][ C2] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) [ 48.263490][ C2] ? ip_rcv_finish_core.constprop.0 (./include/net/net_namespace.h:383 ./include/linux/netdevice.h:2654 net/ipv4/ip_input.c:372) [ 48.263672][ C2] 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) [ 48.263821][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 48.263998][ C2] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 48.264177][ C2] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 48.264352][ C2] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 48.264526][ C2] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) [ 48.264742][ C2] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) [ 48.264962][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 48.265136][ C2] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 48.265310][ C2] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) [ 48.265484][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 48.265667][ C2] __napi_poll.constprop.0 (net/core/dev.c:6703) [ 48.265840][ C2] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) [ 48.266015][ C2] ? __pfx_net_rx_action (net/core/dev.c:6850) [ 48.266188][ C2] ? hlock_class (kernel/locking/lockdep.c:223) [ 48.266363][ C2] ? mark_held_locks (kernel/locking/lockdep.c:4274) [ 48.266537][ C2] ? hrtimer_interrupt (kernel/time/hrtimer.c:1828) [ 48.266712][ C2] __do_softirq (kernel/softirq.c:553) [ 48.266894][ C2] ? netif_rx (./include/linux/bottom_half.h:33 net/core/dev.c:5195 net/core/dev.c:5184) [ 48.267026][ C2] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) [ 48.267162][ C2] [ 48.267250][ C2] [ 48.267338][ C2] __local_bh_enable_ip (kernel/softirq.c:381) [ 48.267515][ C2] netif_rx (net/core/dev.c:5197) [ 48.267646][ C2] dev_loopback_xmit (net/core/dev.c:3910) [ 48.267822][ C2] ip_mc_finish_output (net/ipv4/ip_output.c:363) [ 48.267989][ C2] ip_mc_output (./include/linux/netfilter.h:315 ./include/linux/netfilter.h:308 net/ipv4/ip_output.c:399) [ 48.268161][ C2] ip_push_pending_frames (./include/net/dst.h:450 ./include/net/dst.h:448 net/ipv4/ip_output.c:129 net/ipv4/ip_output.c:1496 net/ipv4/ip_output.c:1516) [ 48.268340][ C2] raw_sendmsg (net/ipv4/raw.c:648) [ 48.268518][ C2] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 48.268694][ C2] ? __pfx_raw_sendmsg (net/ipv4/raw.c:476) [ 48.268877][ C2] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 48.269051][ C2] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 48.269227][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) [ 48.269401][ C2] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 48.269590][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 48.269763][ 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) [ 48.269945][ C2] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 48.270120][ C2] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 48.270293][ C2] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 48.270467][ C2] ? __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) [ 48.270647][ C2] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) [ 48.270821][ C2] ? __pfx___sys_sendto (net/socket.c:2161) [ 48.270995][ C2] ? do_user_addr_fault (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 ./include/linux/mm.h:686 arch/x86/mm/fault.c:1357) [ 48.271168][ C2] ? reacquire_held_locks (kernel/locking/lockdep.c:5279) [ 48.271345][ C2] ? __lock_release (kernel/locking/lockdep.c:5430) [ 48.271520][ C2] ? do_user_addr_fault (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/linux/mm.h:688 arch/x86/mm/fault.c:1357) [ 48.271693][ C2] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 48.271863][ C2] ? __up_read (./arch/x86/include/asm/atomic64_64.h:79 ./include/linux/atomic/atomic-arch-fallback.h:2735 ./include/linux/atomic/atomic-long.h:184 ./include/linux/atomic/atomic-instrumented.h:3289 kernel/locking/rwsem.c:1347) [ 48.272036][ C2] ? __pfx___up_read (kernel/locking/rwsem.c:1339) [ 48.272212][ C2] ? do_user_addr_fault (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:783 ./include/linux/mm.h:688 arch/x86/mm/fault.c:1357) [ 48.272385][ C2] __x64_sys_sendto (net/socket.c:2199) [ 48.272559][ C2] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 48.272771][ C2] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 48.272951][ C2] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 48.273180][ C2] RIP: 0033:0x7fa29051785a [ 48.273362][ C2] 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 [ 48.273934][ C2] RSP: 002b:00007fffe4a60798 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 48.274173][ C2] RAX: ffffffffffffffda RBX: 0000000000000038 RCX: 00007fa29051785a [ 48.274392][ C2] RDX: 0000000000000040 RSI: 0000000000629340 RDI: 0000000000000005 [ 48.274622][ C2] RBP: 00007fffe4a607f0 R08: 00000000004185e0 R09: 0000000000000010 [ 48.274834][ C2] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000054 Finger prints: __pskb_pull_tail:icmp_rcv:ip_protocol_deliver_rcu:ip_local_deliver_finish