panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_synch.c", line 953 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83337325) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83379585,ffffffff833d39ae,3b9,ffffffff833ace54) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80002a86f0b0,ffffffff8332da66) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954 pppx_if_destroy(205b92,ffff80002a86f0a8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b92,41,2000,ffff80002a8b9cb8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80002a847b20) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8062c4c948,41,fffffd8007bfb5b0,ffff80002a8b9cb8) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bbab078,ffff80002a8b9cb8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bbab078,ffff80002a8b9cb8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806bbab078,ffff80002a8b9cb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806bbab078,ffff80002a8b9cb8) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a8b9cb8) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a8b9cb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a8b9cb8,ffff80002a847e80,ffff80002a847dd0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80002a847e70, count: 0 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_synch.c", line 953 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83337325) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83379585,ffffffff833d39ae,3b9,ffffffff833ace54) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80002a86f0b0,ffffffff8332da66) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954 pppx_if_destroy(205b92,ffff80002a86f0a8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b92,41,2000,ffff80002a8b9cb8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80002a847b20) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8062c4c948,41,fffffd8007bfb5b0,ffff80002a8b9cb8) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bbab078,ffff80002a8b9cb8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bbab078,ffff80002a8b9cb8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806bbab078,ffff80002a8b9cb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806bbab078,ffff80002a8b9cb8) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a8b9cb8) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a8b9cb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a8b9cb8,ffff80002a847e80,ffff80002a847dd0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a847e80) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a847e80) at syscall+0x962 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c39dff34ee0, count: -16 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a847900 rbx 0 rdx 0 rcx 0 rax 0xffff80002a8b9cb8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x595b4764f96cdeb8 r11 0x3283025e88ef1855 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff82562815 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a8478f0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=363358 pid=54698 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80002a8b9cb8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a8b8560,0xffff80003c957790 process=0xffff80002a89d6a0 user=0xffff80002a842000, vmspace=0xfffffd806bba95d0 estcpu=36, cpticks=2, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 89022 104908 17729 0 2 0 syz-executor 89022 353135 17729 0 3 0x4000000 biowait syz-executor 1716 356350 75638 0 2 0 syz-executor 9360 4537 64915 0 2 0 syz-executor 9360 127297 64915 0 3 0x4000080 fsleep syz-executor 9360 429866 64915 0 3 0x4000080 fsleep syz-executor 9360 54342 64915 0 3 0x4000080 fsleep syz-executor 34745 87003 98628 0 2 0 syz-executor 34745 420886 98628 0 3 0x4000000 smrbar syz-executor 26170 53387 70215 0 2 0x2 syz-executor 26582 176974 20176 0 2 0 syz-executor 26582 482728 20176 0 3 0x4000080 kqsel syz-executor 26582 426244 20176 0 3 0x4000080 fsleep syz-executor 98628 158832 70215 0 2 0xc82 syz-executor 42504 201009 0 0 3 0x14280 nfsidl nfsio 80416 281272 0 0 3 0x14280 nfsidl nfsio 98186 245148 0 0 3 0x14280 nfsidl nfsio 59213 452603 0 0 3 0x14280 nfsidl nfsio 96485 230464 0 0 3 0x14280 nfsidl nfsio 79977 367174 0 0 3 0x14280 nfsidl nfsio 107 331450 0 0 3 0x14280 nfsidl nfsio 95509 20051 0 0 3 0x14280 nfsidl nfsio 6358 85319 0 0 3 0x14280 nfsidl nfsio 82727 502236 0 0 3 0x14280 nfsidl nfsio 13411 325728 0 0 3 0x14280 nfsidl nfsio 98397 501546 0 0 3 0x14280 nfsidl nfsio 47053 49813 0 0 3 0x14280 nfsidl nfsio 86583 20658 0 0 3 0x14280 nfsidl nfsio 99196 110596 0 0 3 0x14280 nfsidl nfsio 51415 156451 0 0 3 0x14280 nfsidl nfsio 75567 81524 0 0 3 0x14280 nfsidl nfsio 292 195405 0 0 3 0x14280 nfsidl nfsio 1997 254939 0 0 3 0x14280 nfsidl nfsio 8625 424031 0 0 3 0x14280 nfsidl nfsio 80468 426550 0 0 3 0x14200 acct acct 53033 484081 1 0 3 0x100083 ttyin getty 20176 155710 70215 0 2 0xc82 syz-executor 67527 253897 0 0 3 0x14200 bored sosplice 17729 105831 70215 0 3 0x82 nanoslp syz-executor 48146 313460 70215 0 3 0x82 piperd syz-executor 75638 487110 70215 0 3 0x82 nanoslp syz-executor 64915 412528 70215 0 3 0x82 nanoslp syz-executor 43180 108268 70215 0 3 0x82 nanoslp syz-executor 70215 209005 64963 0 2 0x2 syz-executor 64963 190236 18894 0 3 0x10008a sigsusp ksh 18894 260845 65034 0 3 0x98 kqread sshd-session 65034 420271 19037 0 3 0x92 kqread sshd-session 19037 145213 1 0 3 0x88 kqread sshd 6989 57540 9989 73 3 0x1100090 kqread syslogd 9989 183383 1 0 3 0x100082 sbwait syslogd 91938 376701 1 0 3 0x100080 kqread resolvd 73879 156352 4699 77 3 0x100092 kqread dhcpleased 15414 455346 4699 77 3 0x100092 kqread dhcpleased 4699 113711 1 0 3 0x80 kqread dhcpleased 83718 223361 0 0 3 0x14200 bored smr 6329 281578 0 0 2 0x14200 zerothread 83254 425617 0 0 3 0x14200 aiodoned aiodoned 53506 449850 0 0 3 0x14200 syncer update 64273 48974 0 0 3 0x14200 cleaner cleaner 19563 237537 0 0 3 0x14200 reaper reaper 76592 426508 0 0 3 0x14200 pgdaemon pagedaemon 24217 48560 0 0 3 0x14200 bored viomb 26813 366524 0 0 3 0x40014200 acpi0 acpi0 70908 299820 0 0 3 0x14200 bored softnet0 43029 488198 0 0 3 0x14200 smrbar systqmp 76527 208658 0 0 3 0x14200 bored systq 48391 134022 0 0 3 0x40014200 tmoslp softclock 89921 206290 0 0 3 0x40014200 idle0 1 262704 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10184 11115K 11435K 166960K 11713 0 pcb 17 15K 17K 166960K 220 0 rtable 185 7K 8K 166960K 365 0 pf 32 13K 13K 166960K 54 0 ifaddr 40 7K 7K 166960K 66 0 ifgroup 51 2K 2K 166960K 78 0 sysctl 3 1K 9K 166960K 8 0 counters 33 17K 18K 166960K 82 0 ioctlops 0 0K 4K 166960K 115 0 iov 0 0K 12K 166960K 81 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1340 84K 85K 166960K 1630 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 144 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 232K 166960K 452 0 sigio 0 0K 0K 166960K 51 0 proc 63 67K 124K 166960K 564 0 subproc 68 4K 4K 166960K 95 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 48 0 in_multi 86 6K 7K 166960K 139 0 ether_multi 1 0K 0K 166960K 7 0 mrt 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 470 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 207 158K 168K 166960K 5231 0 UVM aobj 7 4K 6K 166960K 8 0 pinsyscall 37 74K 96K 166960K 1530 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 31 0 NDP 11 0K 2K 166960K 40 0 temp 44 8640K 8711K 166960K 12283 0 kqueue 14 22K 30K 166960K 82 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 60 0 57 1 0 1 1 0 8 0 rtentry 136 125 0 50 4 0 4 4 0 8 0 unpcb 144 363 0 346 4 0 4 4 0 8 3 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 736 167 0 162 1 0 1 1 0 8 0 arp 96 15 0 4 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 1 1 0 1 1 0 8 0 inpcb 328 828 0 820 9 0 9 9 0 8 8 nd6 112 21 0 7 1 0 1 1 0 8 0 pkpcb 40 5 0 5 1 0 1 1 0 8 1 kcovpl 48 10 0 3 1 0 1 1 0 8 0 ppxss 1072 46 0 45 1 0 1 1 0 8 0 pppxif 1384 2 0 1 1 0 1 1 0 8 0 pfstitem 24 1 0 0 1 0 1 1 0 8 0 pfstkey 128 1 0 0 1 0 1 1 0 8 0 pfstate 384 1 0 0 1 0 1 1 0 8 0 pfrule 1344 2 0 2 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 586 0 243 30 0 30 30 0 8 8 art_table 40 589 0 243 5 0 5 5 0 8 0 art_node 32 124 0 57 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 2 1 0 1 1 0 8 1 semapl 112 140 0 130 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 26 0 9 3 0 3 3 0 8 0 dino2pl 256 2124 0 614 95 0 95 95 0 8 0 ffsino 256 2124 0 614 95 0 95 95 0 8 0 nchpl 144 2705 0 1018 63 0 63 63 0 8 0 rtmask 32 5 0 5 1 0 1 1 0 8 1 uvmvnodes 80 2350 0 0 48 0 48 48 0 8 0 vnodes 216 2350 0 0 131 0 131 131 0 8 0 namei 1024 9240 0 9239 2 0 2 2 0 8 1 kstatmem 264 40 0 18 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 10146 0 10145 8 0 8 8 1 8 7 plimitpl 152 110 0 93 1 0 1 1 0 8 0 sigapl 424 736 0 673 8 0 8 8 0 8 0 knotepl 120 29757 0 29704 15 4 11 15 0 8 8 kqueuepl 184 193 0 178 1 0 1 1 0 8 0 pipepl 304 203 0 176 3 0 3 3 0 8 0 fdescpl 448 699 0 671 5 0 5 5 0 8 1 filepl 120 4231 0 4021 11 0 11 11 0 8 3 lockfpl 104 145 0 143 1 0 1 1 0 8 0 lockfspl 48 58 0 56 1 0 1 1 0 8 0 sessionpl 144 24 0 16 1 0 1 1 0 8 0 pgrppl 48 43 0 27 1 0 1 1 0 8 0 ucredpl 104 472 0 460 1 0 1 1 0 8 0 zombiepl 144 674 0 673 1 0 1 1 0 8 0 processpl 1152 736 0 673 5 0 5 5 0 8 0 procpl 664 1166 0 1096 7 0 7 7 0 8 0 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 552 1261 0 1233 12 2 10 12 0 8 7 mcl64k 65536 91 0 91 1 0 1 1 0 8 1 mcl16k 16384 5 0 5 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 10 0 10 1 0 1 1 0 8 1 mcl4k 4096 2825 0 2769 14 0 14 14 0 8 7 mcl2k 2048 669 0 668 1 0 1 1 0 8 0 mtagpl 96 9 0 6 1 0 1 1 0 8 0 mbufpl 256 6864 0 6714 11 0 11 11 0 8 0 bufpl 280 4677 0 121 326 0 326 326 0 8 0 anonpl 24 111797 0 108360 68 0 68 68 0 187 44 amapchunkpl 152 16086 0 15661 24 0 24 24 0 158 5 amappl16 200 1746 0 1719 27 16 11 27 0 8 8 amappl15 192 36 0 36 1 0 1 1 0 8 1 amappl14 184 110 0 100 1 0 1 1 0 8 0 amappl13 176 45 0 45 1 0 1 1 0 8 1 amappl12 168 1341 0 1314 3 0 3 3 0 8 1 amappl11 160 66 0 56 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 0 1 1 0 8 1 amappl9 144 257 0 257 1 0 1 1 0 8 1 amappl8 136 18 0 16 1 0 1 1 0 8 0 amappl7 128 98 0 88 1 0 1 1 0 8 0 amappl6 120 207 0 204 1 0 1 1 0 8 0 amappl5 112 136 0 130 1 0 1 1 0 8 0 amappl4 104 280 0 264 1 0 1 1 0 8 0 amappl3 96 2802 0 2728 3 0 3 3 0 8 0 amappl2 88 925 0 856 2 0 2 2 0 8 0 amappl1 80 9246 0 8711 13 0 13 13 0 8 1 amappl 88 4499 0 4356 5 0 5 5 0 92 1 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 0 1 1 0 8 1 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 255 0 255 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 699 0 671 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 699 0 671 1 0 1 1 0 8 0 vmmpekpl 168 7110 0 7069 2 0 2 2 0 8 0 vmmpepl 168 49255 0 47504 96 0 96 96 0 357 15 vmsppl 368 698 0 671 4 0 4 4 0 8 1 rwobjpl 40 17292 0 14128 33 0 33 33 0 8 1 pdppl 4096 1404 0 1342 106 40 66 82 0 8 4 pvpl 32 309441 0 300945 139 0 139 139 0 265 56 pmappl 216 698 0 671 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 378 0 40 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83337325) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83379585,ffffffff833d39ae,3b9,ffffffff833ace54) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80002a86f0b0,ffffffff8332da66) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954 pppx_if_destroy(205b92,ffff80002a86f0a8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b92,41,2000,ffff80002a8b9cb8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80002a847b20) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8062c4c948,41,fffffd8007bfb5b0,ffff80002a8b9cb8) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bbab078,ffff80002a8b9cb8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bbab078,ffff80002a8b9cb8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806bbab078,ffff80002a8b9cb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806bbab078,ffff80002a8b9cb8) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a8b9cb8) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a8b9cb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a8b9cb8,ffff80002a847e80,ffff80002a847dd0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a847e80) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a847e80) at syscall+0x962 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c39dff34ee0, count: -16 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83337325) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83379585,ffffffff833d39ae,3b9,ffffffff833ace54) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80002a86f0b0,ffffffff8332da66) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:954 pppx_if_destroy(205b92,ffff80002a86f0a8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b92,41,2000,ffff80002a8b9cb8) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80002a847b20) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd8062c4c948,41,fffffd8007bfb5b0,ffff80002a8b9cb8) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806bbab078,ffff80002a8b9cb8) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806bbab078,ffff80002a8b9cb8) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd806bbab078,ffff80002a8b9cb8) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd806bbab078,ffff80002a8b9cb8) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80002a8b9cb8) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80002a8b9cb8,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a8b9cb8,ffff80002a847e80,ffff80002a847dd0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a847e80) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a847e80) at syscall+0x962 sys/arch/amd64/amd64/trap.c:746 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7c39dff34ee0, count: -16