login: panic: kernel diagnostic assertion "refs != ~0" failed: file "/syzkaller/managers/main/kernel/sys/kern/kern_synch.c", line 951 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(ffffffff8333ff80) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff8337a1c5,ffffffff833dc330,3b7,ffffffff833b6419) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c9830b0,ffffffff833368ff) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:952 pppx_if_destroy(0,ffff80003c9830a8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b92,41,2000,ffff80003a56cd20) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80002cd2d4e0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806bb73e68,41,fffffd8007bfb680,ffff80003a56cd20) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80742ceb50,ffff80003a56cd20) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80742ceb50,ffff80003a56cd20) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd80742ceb50,ffff80003a56cd20) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80742ceb50,ffff80003a56cd20) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003a56cd20) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003a56cd20,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003a56cd20,ffff80002cd2d840,ffff80002cd2d790) at sys_exit+0x1a sys/kern/kern_exit.c:-1 end trace frame: 0xffff80002cd2d830, 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 951 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8333ff80) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff8337a1c5,ffffffff833dc330,3b7,ffffffff833b6419) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c9830b0,ffffffff833368ff) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:952 pppx_if_destroy(0,ffff80003c9830a8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b92,41,2000,ffff80003a56cd20) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80002cd2d4e0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806bb73e68,41,fffffd8007bfb680,ffff80003a56cd20) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80742ceb50,ffff80003a56cd20) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80742ceb50,ffff80003a56cd20) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd80742ceb50,ffff80003a56cd20) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80742ceb50,ffff80003a56cd20) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003a56cd20) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003a56cd20,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003a56cd20,ffff80002cd2d840,ffff80002cd2d790) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002cd2d840) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cd2d840) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75e8d65e9b90, count: -16 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002cd2d2c0 rbx 0 rdx 0 rcx 0 rax 0xffff80003a56cd20 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe73e5b0de9c8fb60 r11 0xf27de6503b321cf5 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff814433e5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002cd2d2b0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=360696 pid=17289 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003a56cd20 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff80003a56c028,0xffff80002a822a88 process=0xffff80002cd2fb78 user=0xffff80002cd28000, vmspace=0xfffffd806eadcb88 estcpu=33, cpticks=4, pctcpu=0.1, user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 87772 164930 1642 0 2 0 syz-executor 87772 42112 1642 0 2 0x4000000 syz-executor 58727 459379 49713 0 2 0 syz-executor 58727 493931 49713 0 3 0x4000080 sbwait syz-executor 62435 438641 22600 0 2 0xc80 syz-executor 62435 367682 22600 0 2 0x4000000 syz-executor 48900 76093 82395 0 3 0x80 nanoslp syz-executor 48900 4861 82395 0 3 0x4000080 sbwait syz-executor 48900 277375 82395 0 2 0x4000000 syz-executor 48900 245515 82395 0 3 0x4000080 fsleep syz-executor 90157 62118 11185 0 2 0 syz-executor 90157 353538 11185 0 3 0x4000080 ttyout syz-executor 90157 149068 11185 0 2 0x4000000 syz-executor 4568 19911 3444 0 3 0x80 nanoslp syz-executor 4568 272352 3444 0 3 0x4000080 kqread syz-executor 4568 390909 3444 0 3 0x4000080 fsleep syz-executor 36740 207105 16639 0 3 0x82 nanoslp syz-executor 8907 384289 1 0 3 0x100083 ttyin getty 3444 103915 16639 0 2 0xc82 syz-executor 8632 346042 0 0 3 0x14200 bored sosplice 82395 129856 16639 0 3 0x82 nanoslp syz-executor 1642 362898 16639 0 2 0xc82 syz-executor 49713 456922 16639 0 2 0xc82 syz-executor 39068 252347 16639 0 3 0x82 nanoslp syz-executor 11185 127170 16639 0 2 0xc82 syz-executor 22600 140765 16639 0 3 0x82 nanoslp syz-executor 16639 75507 91746 0 3 0x82 kqread syz-executor 91746 96960 91638 0 3 0x10008a sigsusp ksh 91638 359086 26347 0 3 0x98 kqread sshd-session 26347 237319 84772 0 3 0x92 kqread sshd-session 84772 107832 1 0 3 0x88 kqread sshd 96157 457656 9286 73 3 0x1100090 kqread syslogd 9286 239069 1 0 3 0x100082 sbwait syslogd 23156 305309 1 0 3 0x100080 kqread resolvd 91974 479569 67433 77 2 0x100012 dhcpleased 77536 286597 67433 77 3 0x100092 kqread dhcpleased 67433 401793 1 0 3 0x80 kqread dhcpleased 96476 291214 0 0 3 0x14200 bored smr 31837 455820 0 0 2 0x14200 zerothread 13940 392699 0 0 3 0x14200 aiodoned aiodoned 32557 500353 0 0 3 0x14200 syncer update 21939 499508 0 0 3 0x14200 cleaner cleaner 41932 105980 0 0 3 0x14200 reaper reaper 55645 459481 0 0 3 0x14200 pgdaemon pagedaemon 5632 179079 0 0 3 0x14200 bored viomb 5272 389916 0 0 3 0x40014200 acpi0 acpi0 93372 274073 0 0 3 0x14200 bored softnet7 14214 432801 0 0 3 0x14200 bored softnet6 22284 333594 0 0 3 0x14200 bored softnet5 56503 432291 0 0 3 0x14200 bored softnet4 86221 155157 0 0 3 0x14200 bored softnet3 9949 327946 0 0 3 0x14200 bored softnet2 30827 384465 0 0 3 0x14200 bored softnet1 76699 164447 0 0 2 0x14200 softnet0 22457 10509 0 0 3 0x14200 smrbar systqmp 46860 414424 0 0 3 0x14200 bored systq 10689 472413 0 0 2 0x40014200 softclock 65708 199473 0 0 3 0x40014200 idle0 1 517182 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 10202 11054K 12117K 166960K 12376 0 pcb 17 18K 19K 166960K 386 0 rtable 175 8K 9K 166960K 564 0 pf 37 14K 20K 166960K 146 0 ifaddr 37 6K 8K 166960K 96 0 ifgroup 46 2K 2K 166960K 143 0 sysctl 4 1K 9K 166960K 16 0 counters 32 17K 18K 166960K 73 0 ioctlops 0 0K 4K 166960K 220 0 iov 0 0K 18K 166960K 160 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1464 92K 92K 166960K 2520 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 18 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 34 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 93K 166960K 1239 0 sigio 0 0K 0K 166960K 19 0 proc 60 59K 91K 166960K 627 0 subproc 72 4K 4K 166960K 92 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 131 0 in_multi 73 5K 7K 166960K 186 0 ether_multi 1 0K 0K 166960K 16 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 187 837K 837K 166960K 187 0 exec 0 0K 1K 166960K 574 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 238 159K 174K 166960K 12743 0 UVM aobj 20 4K 4K 166960K 20 0 pinsyscall 39 78K 93K 166960K 2362 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 98 0 NDP 10 0K 2K 166960K 60 0 temp 78 8644K 8724K 166960K 34031 0 kqueue 17 26K 38K 166960K 227 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 120 231 0 228 3 0 3 3 0 8 2 rtentry 136 193 0 129 4 0 4 4 0 8 0 unpcb 144 847 0 818 2 0 2 2 0 8 0 syncache 336 13 0 13 1 0 1 1 0 8 1 tcpqe 32 5 0 5 1 0 1 1 0 8 1 tcpcb 736 529 0 520 10 1 9 10 0 8 7 arp 88 42 0 31 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 1795 0 1782 11 1 10 10 0 8 8 ip6q 72 5 0 1 1 0 1 1 0 8 0 ip6af 40 6 0 2 1 0 1 1 0 8 0 nd6 104 24 0 13 1 0 1 1 0 8 0 pkpcb 40 12 0 12 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 ppxss 1072 27 0 25 1 0 1 1 0 8 0 pppxif 1384 8 0 7 1 0 1 1 0 8 0 pfstscr 40 3 0 3 1 0 1 1 0 8 1 pfosfp 40 2 0 2 1 0 1 1 0 8 1 pfosfpen 112 2 0 2 1 0 1 1 0 8 1 pfrktable 1344 4 0 1 1 0 1 1 0 8 0 pfanchor 1288 7 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 8 0 6 1 0 1 1 0 8 0 pfstate 384 4 0 3 1 0 1 1 0 8 0 pfrule 1344 6 0 5 1 0 1 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 682 0 358 28 0 28 28 0 8 7 art_table 40 685 0 358 5 0 5 5 0 8 0 art_node 32 189 0 133 1 0 1 1 0 8 0 sysvmsgpl 40 7 0 4 1 0 1 1 0 8 0 semapl 112 29 0 19 1 0 1 1 0 8 0 shmpl 112 17 0 0 1 0 1 1 0 8 0 dirhash 1024 26 0 9 3 0 3 3 0 8 0 dino2pl 256 3766 0 2272 95 0 95 95 0 8 0 ffsino 256 3766 0 2272 95 0 95 95 0 8 0 nchpl 144 5608 0 3917 63 0 63 63 0 8 0 rtmask 32 3 0 3 1 0 1 1 0 8 1 uvmvnodes 80 4498 0 0 92 0 92 92 0 8 0 vnodes 216 4498 0 0 250 0 250 250 0 8 0 namei 1024 22766 0 22766 2 0 2 2 0 8 2 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 80 0 60 3 0 3 3 0 8 1 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 8 0 8 1 0 1 1 0 8 1 scxspl 216 21468 0 21468 8 0 8 8 1 8 8 plimitpl 152 359 0 342 1 0 1 1 0 8 0 sigapl 424 1532 0 1481 7 0 7 7 0 8 1 knotepl 120 76977 0 76900 37 26 11 23 0 8 8 kqueuepl 184 533 0 518 4 0 4 4 0 8 3 pipepl 304 283 0 253 5 0 5 5 0 8 2 fdescpl 448 1507 0 1477 5 0 5 5 0 8 1 filepl 120 11343 0 11101 15 0 15 15 0 8 5 lockfpl 104 492 0 489 1 0 1 1 0 8 0 lockfspl 48 199 0 196 1 0 1 1 0 8 0 sessionpl 144 31 0 23 1 0 1 1 0 8 0 pgrppl 48 55 0 39 1 0 1 1 0 8 0 ucredpl 104 1643 0 1632 1 0 1 1 0 8 0 zombiepl 144 1483 0 1481 1 0 1 1 0 8 0 processpl 1168 1532 0 1481 5 0 5 5 0 8 1 procpl 664 3186 0 3125 7 0 7 7 0 8 1 sosppl 168 12 0 11 1 0 1 1 0 8 0 sockpl 552 2944 0 2899 14 3 11 13 0 8 7 mcl64k 65536 78 0 78 1 0 1 1 0 8 1 mcl12k 12288 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 14 0 14 1 0 1 1 0 8 1 mcl4k 4096 3922 0 3869 15 0 15 15 0 8 7 mcl2k 2048 1828 0 1819 8 0 8 8 0 8 6 mtagpl 96 6 0 6 1 0 1 1 0 8 1 mbufpl 256 23249 0 23114 409 385 24 409 0 8 8 bufpl 280 7385 0 1157 446 0 446 446 0 8 0 anonpl 24 239794 0 235805 49 0 49 49 0 187 11 amapchunkpl 152 54843 0 54313 34 0 34 34 0 158 13 amappl16 200 4850 0 4796 17 3 14 15 0 8 8 amappl15 192 50 0 50 1 0 1 1 0 8 1 amappl14 184 128 0 118 1 0 1 1 0 8 0 amappl13 176 44 0 44 1 0 1 1 0 8 1 amappl12 168 2157 0 2127 3 0 3 3 0 8 1 amappl11 160 86 0 76 1 0 1 1 0 8 0 amappl10 152 4 0 4 1 0 1 1 0 8 1 amappl9 144 244 0 244 1 0 1 1 0 8 1 amappl8 136 27 0 25 1 0 1 1 0 8 0 amappl7 128 113 0 102 1 0 1 1 0 8 0 amappl6 120 199 0 195 1 0 1 1 0 8 0 amappl5 112 151 0 144 1 0 1 1 0 8 0 amappl4 104 301 0 286 1 0 1 1 0 8 0 amappl3 96 8398 0 8283 4 0 4 4 0 8 0 amappl2 88 739 0 682 2 0 2 2 0 8 0 amappl1 80 14231 0 13683 14 0 14 14 0 8 1 amappl 88 11819 0 11646 5 0 5 5 0 92 0 dma8192 8192 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma2048 2048 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 256 0 256 1 0 1 1 0 8 1 dma64 64 8 0 8 1 0 1 1 0 8 1 dma32 32 8 0 8 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 19 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1507 0 1477 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1507 0 1477 1 0 1 1 0 8 0 vmmpekpl 168 13683 0 13646 2 0 2 2 0 8 0 vmmpepl 168 100655 0 98719 102 0 102 102 0 357 13 vmsppl 368 1506 0 1477 4 0 4 4 0 8 1 rwobjpl 40 32110 0 26713 55 0 55 55 0 8 0 pdppl 4096 3020 0 2954 106 38 68 80 0 8 2 pvpl 32 683123 0 673253 127 0 127 127 0 265 33 pmappl 216 1506 0 1477 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 796 0 424 22 0 22 22 0 8 5 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff8333ff80) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff8337a1c5,ffffffff833dc330,3b7,ffffffff833b6419) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c9830b0,ffffffff833368ff) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:952 pppx_if_destroy(0,ffff80003c9830a8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b92,41,2000,ffff80003a56cd20) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80002cd2d4e0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806bb73e68,41,fffffd8007bfb680,ffff80003a56cd20) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80742ceb50,ffff80003a56cd20) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80742ceb50,ffff80003a56cd20) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd80742ceb50,ffff80003a56cd20) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80742ceb50,ffff80003a56cd20) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003a56cd20) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003a56cd20,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003a56cd20,ffff80002cd2d840,ffff80002cd2d790) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002cd2d840) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cd2d840) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75e8d65e9b90, 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(ffffffff8333ff80) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff8337a1c5,ffffffff833dc330,3b7,ffffffff833b6419) at __assert+0x29 sys/kern/subr_prf.c:-1 refcnt_finalize(ffff80003c9830b0,ffffffff833368ff) at refcnt_finalize+0x1c8 sys/kern/kern_synch.c:952 pppx_if_destroy(0,ffff80003c9830a8) at pppx_if_destroy+0x3d sys/net/if_pppx.c:794 pppxclose(205b92,41,2000,ffff80003a56cd20) at pppxclose+0xa0 sys/net/if_pppx.c:541 spec_close(ffff80002cd2d4e0) at spec_close+0x417 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806bb73e68,41,fffffd8007bfb680,ffff80003a56cd20) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd80742ceb50,ffff80003a56cd20) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd80742ceb50,ffff80003a56cd20) at vn_closefile+0x11d sys/kern/vfs_vnops.c:615 fdrop(fffffd80742ceb50,ffff80003a56cd20) at fdrop+0x121 sys/kern/kern_descrip.c:1280 closef(fffffd80742ceb50,ffff80003a56cd20) at closef+0x190 sys/kern/kern_descrip.c:1264 fdfree(ffff80003a56cd20) at fdfree+0x115 sys/kern/kern_descrip.c:1195 exit1(ffff80003a56cd20,0,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80003a56cd20,ffff80002cd2d840,ffff80002cd2d790) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002cd2d840) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002cd2d840) at syscall+0x962 sys/arch/amd64/amd64/trap.c:748 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x75e8d65e9b90, count: -16