panic: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/route.c", line 1078 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 34003 41190 0 0x100002 0 1 sh * 39117 66553 0 0x2 0 0K ifconfig db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830e8af0) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8309c53b,ffffffff830187ec,436,ffffffff8300f546) at __assert+0x29 rtrequest(1,ffff80003599e8a8,4,ffff80003599e950,0) at rtrequest+0xdce sys/net/route.c:1078 rt_ifa_add(ffff8000016d3f00,840100,ffff8000016d3f58,0) at rt_ifa_add+0x22e sys/net/route.c:1273 in_ifinit(ffff8000015bd000,ffff8000016d3f00,ffff80003599ebc0,1) at in_ifinit+0x4bd in_insert_prefix sys/netinet/in.c:770 [inline] in_ifinit(ffff8000015bd000,ffff8000016d3f00,ffff80003599ebc0,1) at in_ifinit+0x4bd sys/netinet/in.c:703 in_ioctl_change_ifaddr(8040691a,ffff80003599ebb0,ffff8000015bd000) at in_ioctl_change_ifaddr+0x92c sys/netinet/in.c:504 ifioctl(ffff800001718580,8040691a,ffff80003599ebb0,ffff8000ffff3970) at ifioctl+0x1571 pru_control sys/sys/protosw.h:355 [inline] ifioctl(ffff800001718580,8040691a,ffff80003599ebb0,ffff8000ffff3970) at ifioctl+0x1571 sys/net/if.c:2449 sys_ioctl(ffff8000ffff3970,ffff80003599ed90,ffff80003599ece0) at sys_ioctl+0x67c syscall(ffff80003599ed90) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003599ed90) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76e277e35170, count: 4 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "cifp != NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/net/route.c", line 1078 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830e8af0) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8309c53b,ffffffff830187ec,436,ffffffff8300f546) at __assert+0x29 rtrequest(1,ffff80003599e8a8,4,ffff80003599e950,0) at rtrequest+0xdce sys/net/route.c:1078 rt_ifa_add(ffff8000016d3f00,840100,ffff8000016d3f58,0) at rt_ifa_add+0x22e sys/net/route.c:1273 in_ifinit(ffff8000015bd000,ffff8000016d3f00,ffff80003599ebc0,1) at in_ifinit+0x4bd in_insert_prefix sys/netinet/in.c:770 [inline] in_ifinit(ffff8000015bd000,ffff8000016d3f00,ffff80003599ebc0,1) at in_ifinit+0x4bd sys/netinet/in.c:703 in_ioctl_change_ifaddr(8040691a,ffff80003599ebb0,ffff8000015bd000) at in_ioctl_change_ifaddr+0x92c sys/netinet/in.c:504 ifioctl(ffff800001718580,8040691a,ffff80003599ebb0,ffff8000ffff3970) at ifioctl+0x1571 pru_control sys/sys/protosw.h:355 [inline] ifioctl(ffff800001718580,8040691a,ffff80003599ebb0,ffff8000ffff3970) at ifioctl+0x1571 sys/net/if.c:2449 sys_ioctl(ffff8000ffff3970,ffff80003599ed90,ffff80003599ece0) at sys_ioctl+0x67c syscall(ffff80003599ed90) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003599ed90) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76e277e35170, count: -11 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003599e6a0 rbx 0xffffffff83411dcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff8000ffff3970 rax 0xffffffff83410ff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x1e2d9cb7b3e80f9b r11 0xdbef17cf5642c796 r12 0xffffffff83411bd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff82a8df55 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003599e690 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (ifconfig) tid=39117 pid=66553 tcnt=1 stat=onproc flags process=2 proc=0 runpri=75, usrpri=75, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff2020,0xffff8000ffff36f8 process=0xffff800035c51b38 user=0xffff800035999000, vmspace=0xfffffd806b164c10 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 41190 34003 43140 0 7 0x100002 sh *66553 39117 9579 0 7 0x2 ifconfig 9579 202041 79133 0 3 0x10008a sigsusp sh 83894 216976 20431 0 3 0x2 clonelk ifconfig 20431 510917 83351 0 3 0x10008a sigsusp sh 83351 320251 62952 0 3 0x82 wait syz-executor 43140 235658 62952 0 3 0x82 wait syz-executor 79133 363226 62952 0 3 0x82 wait syz-executor 38528 331214 62952 0 3 0x82 piperd syz-executor 6403 353711 62952 0 3 0x82 piperd syz-executor 8774 497451 62952 0 3 0x82 piperd syz-executor 38393 521072 62952 0 3 0x82 piperd syz-executor 27590 314885 0 0 3 0x14200 acct acct 60811 414701 1 0 3 0x100083 ttyin getty 2525 471031 0 0 3 0x14280 nfsidl nfsio 72463 109829 0 0 3 0x14280 nfsidl nfsio 6092 185665 0 0 3 0x14280 nfsidl nfsio 55347 491001 0 0 3 0x14280 nfsidl nfsio 87562 427052 0 0 3 0x14280 nfsidl nfsio 97972 236541 0 0 3 0x14280 nfsidl nfsio 91192 85943 0 0 3 0x14280 nfsidl nfsio 26776 101154 0 0 3 0x14280 nfsidl nfsio 99762 144208 0 0 3 0x14280 nfsidl nfsio 1078 39985 0 0 3 0x14280 nfsidl nfsio 26013 327912 0 0 3 0x14280 nfsidl nfsio 52372 486264 0 0 3 0x14280 nfsidl nfsio 58367 43235 0 0 3 0x14280 nfsidl nfsio 73964 480482 0 0 3 0x14280 nfsidl nfsio 65264 90687 0 0 3 0x14280 nfsidl nfsio 68030 135802 0 0 3 0x14280 nfsidl nfsio 76949 425152 0 0 3 0x14280 nfsidl nfsio 20324 359524 0 0 3 0x14280 nfsidl nfsio 61546 386958 0 0 3 0x14280 nfsidl nfsio 43094 476121 0 0 3 0x14280 nfsidl nfsio 88390 163122 0 0 3 0x14200 bored sosplice 62952 316600 17171 0 3 0x82 wait syz-executor 17171 139087 16973 0 3 0x10008a sigsusp ksh 16973 183665 73876 0 3 0x98 kqread sshd-session 73876 378808 27649 0 3 0x92 kqread sshd-session 27649 151810 1 0 3 0x88 kqread sshd 82146 123485 46958 74 3 0x1100092 bpf pflogd 46958 379052 1 0 3 0x80 sbwait pflogd 92508 109063 86404 73 2 0x1100010 syslogd 86404 496259 1 0 3 0x100082 sbwait syslogd 40719 262559 1 0 3 0x100080 kqread resolvd 90479 33758 20657 77 3 0x100092 kqread dhcpleased 95028 5922 20657 77 3 0x100092 kqread dhcpleased 20657 212731 1 0 3 0x80 kqread dhcpleased 91702 487188 0 0 3 0x14200 bored smr 34883 317681 0 0 2 0x14200 zerothread 95811 397299 0 0 3 0x14200 aiodoned aiodoned 62722 180741 0 0 3 0x14200 syncer update 7820 427208 0 0 3 0x14200 cleaner cleaner 94664 180862 0 0 3 0x14200 reaper reaper 97152 284177 0 0 3 0x14200 pgdaemon pagedaemon 81244 57814 0 0 3 0x14200 bored viomb 73380 188448 0 0 3 0x40014200 acpi0 acpi0 65723 366941 0 0 3 0x40014200 idle1 12660 364856 0 0 3 0x14200 bored softnet3 27277 108028 0 0 3 0x14200 bored softnet2 54495 144070 0 0 3 0x14200 bored softnet1 10607 316882 0 0 3 0x14200 bored softnet0 77495 316244 0 0 3 0x14200 bored systqmp 11882 397300 0 0 3 0x14200 bored systq 32050 313174 0 0 3 0x14200 tmoslp softclockmp 16560 459165 0 0 2 0x40014200 softclock 10204 212183 0 0 3 0x40014200 idle0 1 63936 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 41190 (sh) thread 0xffff8000ffff36e8 (34003) Process 66553 (ifconfig) thread 0xffff8000ffff3970 (39117) Process 92508 (syslogd) thread 0xffff8000ffffd1c8 (109063) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10238 14222K 18372K 166960K 13612 0 pcb 17 16K 18K 166960K 541 0 rtable 180 6K 8K 166960K 1576 0 pf 40 18K 22K 166960K 173 0 ifaddr 39 7K 9K 166960K 244 0 ifgroup 64 2K 3K 166960K 261 0 sysctl 2 0K 0K 166960K 2 0 counters 68 36K 37K 166960K 174 0 ioctlops 0 0K 4K 166960K 1826 0 iov 0 0K 28K 166960K 123 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1441 91K 91K 166960K 3280 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 31 0 VM map 2 1K 1K 166960K 2 0 sem 21 10K 10K 166960K 170 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 15 53K 89K 166960K 2162 0 sigio 0 0K 0K 166960K 34 0 proc 86 116K 128K 166960K 1656 0 subproc 104 6K 7K 166960K 559 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 329 0 in_multi 64 4K 7K 166960K 510 0 ether_multi 1 0K 0K 166960K 9 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 1072 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 185 71K 90K 166960K 20149 0 UVM aobj 20 2K 2K 166960K 22 0 pinsyscall 40 80K 104K 166960K 4179 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 126 0 NDP 14 0K 2K 166960K 150 0 temp 76 6824K 7094K 166960K 98136 0 kqueue 13 20K 30K 166960K 307 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 288 0 285 3 2 1 2 0 8 0 rtentry 112 558 0 478 4 1 3 4 0 8 0 unpcb 144 1123 0 1106 9 8 1 4 0 8 0 syncache 336 10 0 10 5 5 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 703 0 698 27 23 4 8 0 8 3 arp 120 91 0 75 1 0 1 1 0 8 0 inpcb 336 2656 0 2640 40 34 6 13 0 8 3 nd6 136 139 0 124 1 0 1 1 0 8 0 pkpcb 40 9 0 9 4 4 0 1 0 8 0 kcovpl 48 43 0 35 1 0 1 1 0 8 0 ppxss 1168 12 0 12 6 6 0 1 0 8 0 pffrag 232 13 0 7 1 0 1 1 0 482 0 pffrnode 88 13 0 7 1 0 1 1 0 8 0 pffrent 40 108 0 102 2 1 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 173 0 119 1 0 1 1 0 8 0 pfstkey 128 175 0 121 4 0 4 4 0 8 0 pfstate 376 174 0 120 11 1 10 10 0 8 0 pfrule 1344 23 0 17 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 2089 0 1780 40 11 29 30 0 8 3 art_table 32 2092 0 1780 5 1 4 4 0 8 0 art_node 16 519 0 449 1 0 1 1 0 8 0 sysvmsgpl 40 26 0 15 2 1 1 1 0 8 0 semupl 112 4 0 4 2 2 0 1 0 8 0 semapl 112 93 0 74 1 0 1 1 0 8 0 shmpl 112 19 0 2 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 4701 0 3129 99 0 99 99 0 8 0 ffsino 272 4701 0 3129 106 0 106 106 0 8 0 nchpl 144 7265 0 5541 65 0 65 65 0 8 0 uvmvnodes 80 5990 0 0 123 0 123 123 0 8 0 vnodes 216 5990 0 0 333 0 333 333 0 8 0 namei 1024 28209 0 28209 8 7 1 2 0 8 1 percpumem 16 101 0 53 1 0 1 1 0 8 0 kstatmem 264 134 0 106 7 4 3 3 0 8 0 acpiwqpl 32 2 0 2 1 0 1 1 1 8 1 scsiplug 72 2 0 2 2 2 0 1 0 8 0 scxspl 216 39642 0 39642 20 19 1 8 1 8 1 plimitpl 152 362 0 345 1 0 1 1 0 8 0 sigapl 424 2434 0 2365 10 1 9 9 0 8 0 futexpl 64 24732 0 24732 3 2 1 1 0 8 1 knotepl 120 821 0 0 24 0 24 24 0 8 0 kqueuepl 216 601 0 592 4 3 1 3 0 8 0 pipepl 320 545 0 518 8 5 3 8 0 8 0 fdescpl 496 2394 0 2365 5 0 5 5 0 8 0 filepl 152 16273 0 16034 35 22 13 18 0 8 2 lockfpl 104 995 0 993 4 3 1 2 0 8 0 lockfspl 48 341 0 339 1 0 1 1 0 8 0 sessionpl 144 67 0 58 1 0 1 1 0 8 0 pgrppl 48 121 0 104 1 0 1 1 0 8 0 ucredpl 104 2992 0 2979 1 0 1 1 0 8 0 zombiepl 144 2366 0 2365 3 2 1 1 0 8 0 processpl 1160 2434 0 2365 7 1 6 6 0 8 0 procpl 648 5078 0 5009 8 0 8 8 0 8 0 srpgc 96 16 0 16 3 3 0 1 0 8 0 sosppl 168 12 0 12 4 4 0 1 0 8 0 sockpl 664 4105 0 4070 48 39 9 15 0 8 5 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 224 0 0 28 0 28 28 0 8 0 mtagpl 96 92 0 0 3 0 3 3 0 8 0 mbufpl 256 1302 0 0 80 0 80 80 0 8 0 bufpl 280 11499 0 4727 484 0 484 484 0 8 0 anonpl 24 344330 0 341037 133 58 75 78 0 185 30 amapchunkpl 152 64867 0 64539 77 44 33 34 0 158 11 amappl16 200 7077 0 7063 94 83 11 27 0 8 8 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 193 0 181 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 3592 0 3562 3 1 2 2 0 8 0 amappl11 160 48 0 34 1 0 1 1 0 8 0 amappl10 152 10 0 10 1 1 0 1 0 8 0 amappl9 144 220 0 220 1 1 0 1 0 8 0 amappl8 136 19 0 16 1 0 1 1 0 8 0 amappl7 128 184 0 170 1 0 1 1 0 8 0 amappl6 120 501 0 494 1 0 1 1 0 8 0 amappl5 112 279 0 265 1 0 1 1 0 8 0 amappl4 104 442 0 423 1 0 1 1 0 8 0 amappl3 96 12945 0 12870 6 2 4 4 0 8 0 amappl2 88 1218 0 1142 2 0 2 2 0 8 0 amappl1 80 17302 0 16737 16 2 14 14 0 8 0 amappl 88 19323 0 19200 5 0 5 5 0 92 0 dma16384 16384 1 0 1 1 1 0 1 0 8 0 dma8192 8192 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 1 0 8 0 dma256 256 8 0 8 3 3 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 9 0 9 3 3 0 1 0 8 0 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 21 0 2 1 0 1 1 0 8 0 uaddrrnd 24 2394 0 2365 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2394 0 2365 1 0 1 1 0 8 0 vmmpekpl 168 21048 0 20996 4 0 4 4 0 8 0 vmmpepl 168 150742 0 149164 142 49 93 103 0 357 9 vmsppl 440 2393 0 2365 6 2 4 5 0 8 0 rwobjpl 56 47823 0 40901 104 5 99 101 0 8 0 pdppl 4096 4795 0 4730 159 88 71 83 0 8 6 pvpl 32 33437 0 0 271 2 269 270 0 265 0 pmappl 248 2393 0 2365 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 617 0 181 13 0 13 13 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830e8af0) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff8309c53b,ffffffff830187ec,436,ffffffff8300f546) at __assert+0x29 rtrequest(1,ffff80003599e8a8,4,ffff80003599e950,0) at rtrequest+0xdce sys/net/route.c:1078 rt_ifa_add(ffff8000016d3f00,840100,ffff8000016d3f58,0) at rt_ifa_add+0x22e sys/net/route.c:1273 in_ifinit(ffff8000015bd000,ffff8000016d3f00,ffff80003599ebc0,1) at in_ifinit+0x4bd in_insert_prefix sys/netinet/in.c:770 [inline] in_ifinit(ffff8000015bd000,ffff8000016d3f00,ffff80003599ebc0,1) at in_ifinit+0x4bd sys/netinet/in.c:703 in_ioctl_change_ifaddr(8040691a,ffff80003599ebb0,ffff8000015bd000) at in_ioctl_change_ifaddr+0x92c sys/netinet/in.c:504 ifioctl(ffff800001718580,8040691a,ffff80003599ebb0,ffff8000ffff3970) at ifioctl+0x1571 pru_control sys/sys/protosw.h:355 [inline] ifioctl(ffff800001718580,8040691a,ffff80003599ebb0,ffff8000ffff3970) at ifioctl+0x1571 sys/net/if.c:2449 sys_ioctl(ffff8000ffff3970,ffff80003599ed90,ffff80003599ece0) at sys_ioctl+0x67c syscall(ffff80003599ed90) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003599ed90) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x76e277e35170, count: -11 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff834ffa30) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834ffa30) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff800035998a40) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800035998a40) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f197638dc50, count: 9 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff834ffa30) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834ffa30) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff800035998a40) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff800035998a40) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f197638dc50, count: -6