====================================== | [ 1482.486342][ T7623] GACT probability NOT on | [ 1486.175132][ C0] ------------[ cut here ]------------ | [ 1486.175484][ C0] kernel BUG at net/core/skbuff.c:3505! | [ 1486.175674][ C0] invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI [ 1486.176090][ C0] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.16.3-0-ga6ed6b701f0a-prebuilt.qemu.org 04/01/2014 [ 1486.176417][ C0] RIP: 0010:__skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 1486.176578][ C0] 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 e7 53 8d 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 e7 53 8d fe call 0xfffffffffe8d5426 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 e7 53 8d fe call 0xfffffffffe8d53fc 15: 8b .byte 0x8b [ 1486.177097][ C0] RSP: 0018:ffffc90000007920 EFLAGS: 00010206 [ 1486.177293][ C0] RAX: 0000000000003928 RBX: 0000000000000008 RCX: 1ffff110015796a9 [ 1486.177514][ C0] RDX: 00000000000000b2 RSI: dffffc0000000000 RDI: ffff88800abcb548 [ 1486.177735][ C0] RBP: 0000000000003928 R08: 0000000000000008 R09: fffffbfff172a5a2 [ 1486.177962][ C0] R10: ffffffff8b952d17 R11: ffffc90000007659 R12: 0000000000000008 [ 1486.178175][ C0] R13: 0000000000000000 R14: ffffc900000079e0 R15: ffff88800c03b088 [ 1486.178389][ C0] FS: 00007f0ad08aa740(0000) GS:ffff888036000000(0000) knlGS:0000000000000000 [ 1486.178642][ C0] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 1486.178824][ C0] CR2: 00007fffd082f000 CR3: 0000000006970004 CR4: 0000000000770ef0 [ 1486.179046][ C0] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 1486.179263][ C0] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 1486.179479][ C0] PKRU: 55555554 [ 1486.179589][ C0] Call Trace: [ 1486.179697][ C0] [ 1486.179772][ C0] ? die (arch/x86/kernel/dumpstack.c:421 arch/x86/kernel/dumpstack.c:434 arch/x86/kernel/dumpstack.c:447) [ 1486.179888][ C0] ? do_trap (arch/x86/kernel/traps.c:113 arch/x86/kernel/traps.c:154) [ 1486.180003][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 1486.180151][ C0] ? do_error_trap (./arch/x86/include/asm/traps.h:58 arch/x86/kernel/traps.c:175) [ 1486.180296][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 1486.180442][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 1486.180587][ C0] ? handle_invalid_op (arch/x86/kernel/traps.c:213) [ 1486.180731][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 1486.180874][ C0] ? exc_invalid_op (arch/x86/kernel/traps.c:265) [ 1486.181020][ C0] ? asm_exc_invalid_op (./arch/x86/include/asm/idtentry.h:568) [ 1486.181168][ C0] ? __skb_checksum (net/core/skbuff.c:3505 (discriminator 1)) [ 1486.181314][ C0] __skb_checksum_complete (net/core/skbuff.c:3643) [ 1486.181462][ C0] ? __pfx___skb_checksum_complete (net/core/skbuff.c:3637) [ 1486.181649][ C0] ? __pfx_csum_partial_ext (./include/net/checksum.h:120) [ 1486.181792][ C0] ? __pfx_csum_block_add_ext (./include/net/checksum.h:103) [ 1486.181937][ C0] icmp_rcv (./include/linux/skbuff.h:4567 net/ipv4/icmp.c:1213) [ 1486.182050][ C0] ip_protocol_deliver_rcu (net/ipv4/ip_input.c:205 (discriminator 5)) [ 1486.182196][ C0] ip_local_deliver_finish (./include/linux/rcupdate.h:779 net/ipv4/ip_input.c:234) [ 1486.182341][ C0] ip_local_deliver (./include/linux/netfilter.h:314 ./include/linux/netfilter.h:308 net/ipv4/ip_input.c:254) [ 1486.182487][ C0] ? __pfx_ip_local_deliver (net/ipv4/ip_input.c:243) [ 1486.182632][ C0] ? ip_rcv_finish_core.constprop.0 (net/ipv4/ip_input.c:367) [ 1486.182812][ C0] 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) [ 1486.182921][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 1486.183065][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 1486.183209][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 1486.183354][ C0] ? __pfx_ip_rcv (net/ipv4/ip_input.c:562) [ 1486.183498][ C0] __netif_receive_skb_one_core (net/core/dev.c:5610 (discriminator 4)) [ 1486.183679][ C0] ? __pfx___netif_receive_skb_one_core (net/core/dev.c:5603) [ 1486.183857][ C0] ? __pfx_do_raw_spin_lock (kernel/locking/spinlock_debug.c:114) [ 1486.184001][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1486.184144][ C0] ? process_backlog (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/core/dev.c:6051) [ 1486.184287][ C0] process_backlog (./include/linux/rcupdate.h:779 net/core/dev.c:6053) [ 1486.184431][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 1486.184576][ C0] __napi_poll.constprop.0 (net/core/dev.c:6703) [ 1486.184721][ C0] net_rx_action (net/core/dev.c:6772 net/core/dev.c:6886) [ 1486.184869][ C0] ? __pfx_net_rx_action (net/core/dev.c:6850) [ 1486.185012][ C0] ? kvm_clock_get_cycles (./arch/x86/include/asm/preempt.h:94 arch/x86/kernel/kvmclock.c:80 arch/x86/kernel/kvmclock.c:86) [ 1486.185157][ C0] ? ktime_get (kernel/time/timekeeping.c:195 (discriminator 4) kernel/time/timekeeping.c:289 (discriminator 4) kernel/time/timekeeping.c:388 (discriminator 4) kernel/time/timekeeping.c:848 (discriminator 4)) [ 1486.185266][ C0] ? hrtimer_interrupt (kernel/time/hrtimer.c:1828) [ 1486.185410][ C0] ? hrtimer_interrupt (kernel/time/hrtimer.c:1828) [ 1486.185553][ C0] __do_softirq (kernel/softirq.c:553) [ 1486.185698][ C0] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) [ 1486.185844][ C0] do_softirq (kernel/softirq.c:454 kernel/softirq.c:441) [ 1486.185960][ C0] [ 1486.186033][ C0] [ 1486.186106][ C0] __local_bh_enable_ip (kernel/softirq.c:381) [ 1486.186250][ C0] ? __dev_queue_xmit (./include/linux/rcupdate.h:308 ./include/linux/rcupdate.h:818 net/core/dev.c:4399) [ 1486.186392][ C0] __dev_queue_xmit (net/core/dev.c:4400) [ 1486.186536][ C0] ? lock_acquire.part.0 (kernel/locking/lockdep.c:467 kernel/locking/lockdep.c:5756) [ 1486.186679][ C0] ? ip_finish_output2 (./include/linux/rcupdate.h:298 ./include/linux/rcupdate.h:750 net/ipv4/ip_output.c:228) [ 1486.186823][ C0] ? eth_header (net/ethernet/eth.c:100) [ 1486.186967][ C0] ? __pfx___dev_queue_xmit (net/core/dev.c:4281) [ 1486.187116][ C0] ip_finish_output2 (./include/net/neighbour.h:542 net/ipv4/ip_output.c:235) [ 1486.187269][ C0] ? __pfx_ip_finish_output2 (net/ipv4/ip_output.c:199) [ 1486.187416][ C0] ? __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) [ 1486.187561][ C0] ip_output (./include/linux/netfilter.h:303 net/ipv4/ip_output.c:433) [ 1486.187670][ C0] ? __pfx_ip_output (net/ipv4/ip_output.c:427) [ 1486.187814][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1486.187956][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 1486.188102][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1486.188284][ C0] NF_HOOK.constprop.0 (./include/linux/skbuff.h:1624 ./include/linux/skbuff.h:4992 net/ipv4/ip_forward.c:99) [ 1486.188428][ C0] ? __pfx_NF_HOOK.constprop.0 (./include/linux/netfilter.h:308) [ 1486.188573][ C0] ? __get_random_u32_below (drivers/char/random.c:557) [ 1486.188717][ C0] ? __ip_select_ident (./arch/x86/include/asm/atomic.h:85 ./include/linux/atomic/atomic-arch-fallback.h:564 ./include/linux/atomic/atomic-instrumented.h:124 net/ipv4/route.c:480 net/ipv4/route.c:496) [ 1486.188862][ C0] raw_send_hdrinc (net/ipv4/raw.c:408) [ 1486.189007][ C0] ? __pfx_raw_send_hdrinc (net/ipv4/raw.c:323) [ 1486.189150][ C0] ? 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) [ 1486.189298][ C0] raw_sendmsg (net/ipv4/raw.c:634) [ 1486.189441][ C0] ? __pfx_validate_chain (kernel/locking/lockdep.c:3825) [ 1486.189585][ C0] ? __pfx_raw_sendmsg (net/ipv4/raw.c:476) [ 1486.189730][ C0] ? __lock_acquire (kernel/locking/lockdep.c:5137) [ 1486.189877][ C0] ? find_held_lock (kernel/locking/lockdep.c:5244) [ 1486.190020][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) [ 1486.190163][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 1486.190306][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 1486.190449][ C0] ? 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) [ 1486.190599][ C0] ? lock_acquire (./include/trace/events/lock.h:24 kernel/locking/lockdep.c:5725) [ 1486.190743][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 1486.190887][ C0] ? __might_fault (mm/memory.c:6080 mm/memory.c:6073) [ 1486.191031][ C0] ? __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) [ 1486.191174][ C0] __sys_sendto (net/socket.c:730 net/socket.c:745 net/socket.c:2191) [ 1486.191318][ C0] ? __pfx___sys_sendto (net/socket.c:2161) [ 1486.191462][ C0] ? 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) [ 1486.191607][ C0] ? reacquire_held_locks (kernel/locking/lockdep.c:5279) [ 1486.191756][ C0] ? __lock_release (kernel/locking/lockdep.c:5430) [ 1486.191899][ C0] ? 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) [ 1486.192042][ C0] ? __pfx___lock_release (kernel/locking/lockdep.c:5406) [ 1486.192185][ C0] ? __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) [ 1486.192329][ C0] ? __pfx___up_read (kernel/locking/rwsem.c:1339) [ 1486.192472][ C0] ? 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) [ 1486.192618][ C0] __x64_sys_sendto (net/socket.c:2199) [ 1486.192763][ C0] ? lockdep_hardirqs_on_prepare.part.0 (kernel/locking/lockdep.c:4300 kernel/locking/lockdep.c:4359) [ 1486.192945][ C0] do_syscall_64 (arch/x86/entry/common.c:52 arch/x86/entry/common.c:83) [ 1486.193089][ C0] entry_SYSCALL_64_after_hwframe (arch/x86/entry/entry_64.S:129) [ 1486.193269][ C0] RIP: 0033:0x7f0ad0b0485a [ 1486.193419][ C0] 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 [ 1486.193926][ C0] RSP: 002b:00007fffd0836b88 EFLAGS: 00000246 ORIG_RAX: 000000000000002c [ 1486.194149][ C0] RAX: ffffffffffffffda RBX: 0000000000f3a9d0 RCX: 00007f0ad0b0485a [ 1486.194364][ C0] RDX: 0000000000000080 RSI: 0000000000f3ac90 RDI: 0000000000000005 [ 1486.194579][ C0] RBP: 0000000000f3a9d0 R08: 00007fffd0836b90 R09: 0000000000000010 [ 1486.194792][ C0] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000080 Finger prints: __skb_checksum:__skb_checksum_complete:icmp_rcv:ip_protocol_deliver_rcu