witness: lock order reversal: 1st 0xfffffd8069dbc308 vmmaplk (&map->lock) 2nd 0xfffffd8078ca82c8 inode (&ip->i_lock) lock order "&ip->i_lock"(rrwlock) -> "&map->lock"(rwlock) first seen at: #0 witness_checkorder+0x65e witness_lock_order_add sys/kern/subr_witness.c:2463 [inline] #0 witness_checkorder+0x65e sys/kern/subr_witness.c:880 #1 rw_enter_read+0x66 sys/kern/kern_rwlock.c:111 #2 uvmfault_lookup+0xd9 sys/uvm/uvm_fault.c:1438 #3 uvm_fault+0x7e sys/uvm/uvm_fault.c:526 #4 pageflttrap+0x254 sys/arch/amd64/amd64/trap.c:219 #5 kerntrap+0xf1 sys/arch/amd64/amd64/trap.c:301 #6 alltraps_kern_meltdown+0x7b #7 copyout+0x53 #8 ffs_read+0x3e2 sys/ufs/ffs/ffs_vnops.c:258 #9 VOP_READ+0xbf sys/kern/vfs_vops.c:253 #10 vn_rdwr+0x10b #11 vmcmd_map_readvn+0xda sys/kern/exec_subr.c:246 #12 exec_process_vmcmds+0xb2 sys/kern/exec_subr.c:143 #13 sys_execve+0x9ff sys/kern/kern_exec.c:461 #14 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #14 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:567 #15 Xsyscall+0x128 lock order "&map->lock"(rwlock) -> "&ip->i_lock"(rrwlock) first seen at: #0 witness_checkorder+0x65e witness_lock_order_add sys/kern/subr_witness.c:2463 [inline] #0 witness_checkorder+0x65e sys/kern/subr_witness.c:880 #1 rw_enter+0xd4 #2 rrw_enter+0x88 sys/kern/kern_rwlock.c:462 #3 VOP_LOCK+0x4b sys/kern/vfs_vops.c:614 #4 vn_lock+0x6c sys/kern/vfs_vnops.c:575 #5 uvn_io+0x2b5 sys/uvm/uvm_vnode.c:1196 #6 uvn_get+0x226 sys/uvm/uvm_vnode.c:1056 #7 uvm_fault+0x1197 sys/uvm/uvm_fault.c:1016 #8 uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1285 #9 uvm_map_pageable_wire+0x30d sys/uvm/uvm_map.c:2367 #10 sys_mlockall+0x6a sys/uvm/uvm_mmap.c:833 #11 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #11 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:567 #12 Xsyscall+0x128 Stopped at db_enter+0x18: addq $0x8,%rsp ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 witness_checkorder(fffffd8078ca82c8,9,0) at witness_checkorder+0xf5a witness_debugger sys/kern/subr_witness.c:2490 [inline] witness_checkorder(fffffd8078ca82c8,9,0) at witness_checkorder+0xf5a sys/kern/subr_witness.c:1087 rw_enter(fffffd8078ca82b8,81) at rw_enter+0xd4 rrw_enter(fffffd8078ca82b8,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:462 VOP_LOCK(fffffd8078ca9ec0,81) at VOP_LOCK+0x4b sys/kern/vfs_vops.c:614 vn_lock(fffffd8078ca9ec0,81) at vn_lock+0x6c sys/kern/vfs_vnops.c:575 uvn_io(fffffd806dd29c20,ffff800022347728,1,2,0) at uvn_io+0x2b5 sys/uvm/uvm_vnode.c:1196 uvn_get(fffffd806dd29c20,10000,ffff800022347980,ffff80002234791c,0,3) at uvn_get+0x226 sys/uvm/uvm_vnode.c:1056 uvm_fault(fffffd8069dbc2f0,1b31b30000,2,3) at uvm_fault+0x1197 sys/uvm/uvm_fault.c:1016 uvm_fault_wire(fffffd8069dbc2f0,1b31b20000,1b32b20000,3) at uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1285 uvm_map_pageable_wire(fffffd8069dbc2f0,fffffd806b7a6438,0,35a,ffffffff818c8690,0) at uvm_map_pageable_wire+0x30d sys/uvm/uvm_map.c:2367 sys_mlockall(ffff8000212b8018,ffff800022347b58,ffff800022347ba0) at sys_mlockall+0x6a sys/uvm/uvm_mmap.c:833 syscall(ffff800022347c20) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022347c20) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:567 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x37b24120870, count: -14 ddb{0}> show registers rdi 0x3 rsi 0x40000 acpi_pdirpa+0x2be68 rbp 0xffff800022347380 rbx 0x3 rdx 0xffff800000b0ed00 rcx 0x3 rax 0x3ffff acpi_pdirpa+0x2be67 r8 0xffffffff81cbac53 witness_checkorder+0xf33 r9 0x5 r10 0x60145fb829708ca5 r11 0x5b5e3748295f16ff r12 0xffffffff828713c0 w_lodata+0x54380 r13 0 r14 0xffffffff82862c10 w_lodata+0x45bd0 r15 0xfffffd8002c90480 rip 0xffffffff82325158 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022347370 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=280807 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000212b9160,0xffffffff82884bd8 process=0xffff8000212bbb98 user=0xffff800022342000, vmspace=0xfffffd8069dbc2f0 estcpu=36, cpticks=7, pctcpu=0.0 user=0, sys=7, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 45434 38642 71391 0 2 0 syz-executor.0 *45434 280807 71391 0 7 0x4000000 syz-executor.0 38194 179989 33585 0 2 0 syz-executor.1 38194 428624 33585 0 3 0x4000080 lockf syz-executor.1 71391 344573 95134 0 2 0x482 syz-executor.0 9766 472144 0 0 3 0x14200 bored sosplice 33585 70885 95134 0 7 0x482 syz-executor.1 95134 265439 33049 0 3 0x82 thrsleep syz-fuzzer 95134 226872 33049 0 2 0x4000482 syz-fuzzer 95134 409176 33049 0 3 0x4000082 thrsleep syz-fuzzer 95134 13262 33049 0 3 0x4000082 thrsleep syz-fuzzer 95134 124974 33049 0 3 0x4000082 kqread syz-fuzzer 95134 290186 33049 0 3 0x4000082 thrsleep syz-fuzzer 95134 55695 33049 0 3 0x4000082 thrsleep syz-fuzzer 95134 92109 33049 0 3 0x4000082 thrsleep syz-fuzzer 33049 297554 15173 0 3 0x10008a pause ksh 15173 166450 9594 0 3 0x92 select sshd 18966 29160 1 0 3 0x100083 ttyin getty 9594 48714 1 0 3 0x80 select sshd 14661 188683 74139 74 3 0x100092 bpf pflogd 74139 251065 1 0 3 0x80 netio pflogd 34107 316088 89471 73 3 0x100090 kqread syslogd 89471 329072 1 0 3 0x100082 netio syslogd 23591 375300 1 77 3 0x100090 poll dhclient 15323 436270 1 0 3 0x80 poll dhclient 46382 318235 0 0 3 0x14200 bored smr 74933 377243 0 0 2 0x14200 zerothread 86912 326322 0 0 3 0x14200 aiodoned aiodoned 98549 18443 0 0 3 0x14200 syncer update 21936 184556 0 0 3 0x14200 cleaner cleaner 68540 180959 0 0 3 0x14200 reaper reaper 88304 357036 0 0 3 0x14200 pgdaemon pagedaemon 36543 473696 0 0 3 0x14200 bored crynlk 24826 169053 0 0 3 0x14200 bored crypto 75097 385333 0 0 3 0x40014200 acpi0 acpi0 64934 397116 0 0 3 0x40014200 idle1 65410 195742 0 0 3 0x14200 bored softnet 90833 176882 0 0 3 0x14200 bored systqmp 52900 222716 0 0 3 0x14200 bored systq 38608 272823 0 0 3 0x40014200 bored softclock 96409 332523 0 0 3 0x40014200 idle0 1 226884 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 45434 (syz-executor.0) thread 0xffff8000212b8018 (280807) shared rwlock vmmaplk r = 0 (0xfffffd8069dbc308) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 rw_enter+0x446 sys/kern/kern_rwlock.c:311 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5452 #3 uvm_map_pageable_all+0x56 sys/uvm/uvm_map.c:2576 #4 sys_mlockall+0x6a sys/uvm/uvm_mmap.c:833 #5 syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a1 sys/arch/amd64/amd64/trap.c:567 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82893b60) #0 witness_lock+0x4b0 stacktrace_save sys/sys/stacktrace.h:36 [inline] #0 witness_lock+0x4b0 sys/kern/subr_witness.c:1164 #1 syscall+0x3fd mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3fd sys/arch/amd64/amd64/trap.c:567 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9501 6409K 7120K 78643K 13592 0 pcb 13 8K 8K 78643K 160 0 rtable 112 4K 4K 78643K 575 0 ifaddr 62 13K 14K 78643K 204 0 counters 43 33K 34K 78643K 105 0 ioctlops 0 0K 4K 78643K 1653 0 iov 0 0K 12K 78643K 85 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 2204 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 226 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1824 197K 290K 78643K 13058 0 file desc 6 17K 25K 78643K 2752 0 sigio 0 0K 0K 78643K 15 0 proc 62 63K 95K 78643K 709 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 224 0 in_multi 33 2K 2K 78643K 244 0 ether_multi 1 0K 0K 78643K 58 0 mrt 0 0K 0K 78643K 44 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 2K 78643K 515 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 160 141K 156K 78643K 7107 0 UVM aobj 14 2K 2K 78643K 14 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 157 0 NDP 10 0K 0K 78643K 48 0 temp 123 3966K 4034K 78643K 20095 0 kqueue 3 4K 12K 78643K 164 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 8 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 96 88 0 86 1 0 1 1 0 8 0 rtentry 112 81 0 37 2 0 2 2 0 8 0 unpcb 120 831 0 794 2 0 2 2 0 8 0 syncache 272 42 0 42 5 4 1 1 0 8 1 tcpqe 32 22 0 22 2 1 1 1 0 8 1 tcpcb 592 597 0 586 14 10 4 5 0 8 1 inpcb 296 1490 0 1476 4 2 2 2 0 8 0 rttmr 72 14 0 14 1 1 0 1 0 8 0 nd6 48 9 0 3 1 0 1 1 0 8 0 pkpcb 40 16 0 16 1 1 0 1 0 8 0 kcovpl 48 3 0 1 1 0 1 1 0 8 0 ppxss 1128 11 0 11 1 1 0 1 0 8 0 pfstscr 40 10 0 10 1 1 0 1 0 8 0 pffrag 232 20 0 20 1 1 0 1 0 482 0 pffrnode 88 20 0 20 1 1 0 1 0 8 0 pffrent 40 900 0 900 1 1 0 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 87 0 66 1 0 1 1 0 8 0 pfstkey 112 97 0 76 2 0 2 2 0 8 0 pfstate 328 92 0 71 6 0 6 6 0 8 3 pfrule 1360 37 0 21 3 1 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 236 0 44 12 0 12 12 0 8 0 art_table 32 237 0 44 2 0 2 2 0 8 0 art_node 16 69 0 29 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 0 1 0 1 1 0 8 0 semupl 112 16 0 16 1 1 0 1 0 8 0 semapl 112 214 0 204 1 0 1 1 0 8 0 shmpl 112 11 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4896 0 3495 88 0 88 88 0 8 0 ffsino 272 4896 0 3495 94 0 94 94 0 8 0 nchpl 144 8431 0 6838 60 0 60 60 0 8 0 uvmvnodes 72 5613 0 0 103 0 103 103 0 8 0 vnodes 208 5613 0 0 296 0 296 296 0 8 0 namei 1024 21076 0 21076 1 0 1 1 0 8 1 percpumem 16 63 0 31 1 0 1 1 0 8 0 vcpupl 1984 8 0 0 1 0 1 1 0 8 0 vmpool 560 19 0 11 1 0 1 1 0 8 0 scxspl 192 24930 0 24930 10 9 1 7 0 8 1 plimitpl 152 127 0 118 1 0 1 1 0 8 0 sigapl 424 2965 0 2932 4 0 4 4 0 8 0 futexpl 56 21173 0 21173 1 0 1 1 0 8 1 knotepl 112 263 0 243 1 0 1 1 0 8 0 kqueuepl 152 1164 0 1161 1 0 1 1 0 8 0 pipepl 304 192 0 181 6 5 1 2 0 8 0 fdescpl 496 2949 0 2932 3 0 3 3 0 8 0 filepl 152 11012 0 10908 5 0 5 5 0 8 0 lockfpl 104 372 0 369 1 0 1 1 0 8 0 lockfspl 48 151 0 149 1 0 1 1 0 8 0 sessionpl 120 19 0 8 1 0 1 1 0 8 0 pgrppl 48 19 0 8 1 0 1 1 0 8 0 ucredpl 96 1610 0 1601 1 0 1 1 0 8 0 zombiepl 144 2932 0 2932 1 0 1 1 0 8 1 processpl 1008 2965 0 2932 5 0 5 5 0 8 0 procpl 632 6294 0 6252 4 0 4 4 0 8 0 sosppl 144 101 0 101 4 4 0 1 0 8 0 sockpl 400 2425 0 2372 8 1 7 7 0 8 1 mcl64k 65536 18 0 0 3 0 3 3 0 8 0 mcl16k 16384 6 0 0 1 0 1 1 0 8 0 mcl12k 12288 23 0 0 2 0 2 2 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 20 0 0 3 0 3 3 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 211 0 0 16 0 16 16 0 8 0 mtagpl 96 232 0 0 6 0 6 6 0 8 0 mbufpl 256 683 0 0 39 0 39 39 0 8 0 bufpl 280 7790 0 1540 447 0 447 447 0 8 0 anonpl 16 281456 0 272133 74 36 38 51 0 124 0 amapchunkpl 152 15705 0 15291 41 25 16 21 0 158 0 amappl16 192 11980 0 11804 35 26 9 31 0 8 0 amappl15 184 1642 0 1636 1 0 1 1 0 8 0 amappl14 176 22 0 18 1 0 1 1 0 8 0 amappl13 168 31 0 30 1 0 1 1 0 8 0 amappl12 160 1101 0 1092 1 0 1 1 0 8 0 amappl11 152 61 0 46 1 0 1 1 0 8 0 amappl10 144 10 0 7 1 0 1 1 0 8 0 amappl9 136 363 0 360 1 0 1 1 0 8 0 amappl8 128 234 0 172 3 0 3 3 0 8 0 amappl7 120 254 0 247 1 0 1 1 0 8 0 amappl6 112 68 0 59 1 0 1 1 0 8 0 amappl5 104 3117 0 3095 1 0 1 1 0 8 0 amappl4 96 1405 0 1373 1 0 1 1 0 8 0 amappl3 88 228 0 221 1 0 1 1 0 8 0 amappl2 80 19976 0 19899 3 1 2 3 0 8 0 amappl1 72 91532 0 91030 27 17 10 19 0 8 0 amappl 80 6622 0 6558 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 253 0 253 1 1 0 1 0 8 0 dma64 64 6 0 6 1 1 0 1 0 8 0 dma32 32 7 0 7 1 1 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 64 13 0 0 1 0 1 1 0 8 0 uaddrrnd 24 2968 0 2943 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2968 0 2943 1 0 1 1 0 8 0 vmmpekpl 168 18364 0 18327 3 1 2 2 0 8 0 vmmpepl 168 367656 0 366148 112 44 68 85 0 357 2 vmsppl 368 2967 0 2943 3 0 3 3 0 8 0 pdppl 4096 5943 0 5894 7 0 7 7 0 8 0 pvpl 32 1043079 0 1030497 224 122 102 132 0 265 0 pmappl 232 2967 0 2943 3 1 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 292 0 8 9 0 9 9 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 witness_checkorder(fffffd8078ca82c8,9,0) at witness_checkorder+0xf5a witness_debugger sys/kern/subr_witness.c:2490 [inline] witness_checkorder(fffffd8078ca82c8,9,0) at witness_checkorder+0xf5a sys/kern/subr_witness.c:1087 rw_enter(fffffd8078ca82b8,81) at rw_enter+0xd4 rrw_enter(fffffd8078ca82b8,81) at rrw_enter+0x88 sys/kern/kern_rwlock.c:462 VOP_LOCK(fffffd8078ca9ec0,81) at VOP_LOCK+0x4b sys/kern/vfs_vops.c:614 vn_lock(fffffd8078ca9ec0,81) at vn_lock+0x6c sys/kern/vfs_vnops.c:575 uvn_io(fffffd806dd29c20,ffff800022347728,1,2,0) at uvn_io+0x2b5 sys/uvm/uvm_vnode.c:1196 uvn_get(fffffd806dd29c20,10000,ffff800022347980,ffff80002234791c,0,3) at uvn_get+0x226 sys/uvm/uvm_vnode.c:1056 uvm_fault(fffffd8069dbc2f0,1b31b30000,2,3) at uvm_fault+0x1197 sys/uvm/uvm_fault.c:1016 uvm_fault_wire(fffffd8069dbc2f0,1b31b20000,1b32b20000,3) at uvm_fault_wire+0x63 sys/uvm/uvm_fault.c:1285 uvm_map_pageable_wire(fffffd8069dbc2f0,fffffd806b7a6438,0,35a,ffffffff818c8690,0) at uvm_map_pageable_wire+0x30d sys/uvm/uvm_map.c:2367 sys_mlockall(ffff8000212b8018,ffff800022347b58,ffff800022347ba0) at sys_mlockall+0x6a sys/uvm/uvm_mmap.c:833 syscall(ffff800022347c20) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022347c20) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:567 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x37b24120870, count: -14 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp ddb{1}> trace x86_ipi_db(ffff800020d80ff0) at x86_ipi_db+0x1a sys/arch/amd64/amd64/db_interface.c:352 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x23 __mp_lock(ffffffff82893958) at __mp_lock+0x120 __mp_lock_spin sys/kern/kern_lock.c:117 [inline] __mp_lock(ffffffff82893958) at __mp_lock+0x120 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82893958,1) at __mp_acquire_count+0x4c sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x390 sys/kern/sched_bsd.c:435 sleep_finish(ffff800021307f20,1) at sleep_finish+0x111 sys/kern/kern_synch.c:418 sleep_finish_all(ffff800021307f20,1) at sleep_finish_all+0x32 sleep_finish_timeout sys/kern/kern_synch.c:447 [inline] sleep_finish_all(ffff800021307f20,1) at sleep_finish_all+0x32 sys/kern/kern_synch.c:393 tsleep(ffffffff8287daf4,120,ffffffff823bb623,2) at tsleep+0x1c2 sys/kern/kern_synch.c:155 sys_nanosleep(ffff8000212b9650,ffff800021308050,ffff8000213080a0) at sys_nanosleep+0x1f5 sys/kern/kern_time.c:297 syscall(ffff800021308120) at syscall+0x4a1 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021308120) at syscall+0x4a1 sys/arch/amd64/amd64/trap.c:567 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7fffff7c50, count: -12