panic: kernel diagnostic assertion "sc->sc_dev == 0" failed: file "/syzkaller/managers/main/kernel/sys/net/if_tun.c", line 315 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82780000) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff827fd334,ffffffff8283409e,13b,ffffffff82814215) at __assert+0x29 sys/kern/subr_prf.c:157 tun_clone_destroy(ffff800000d5d800) at tun_clone_destroy+0x234 sys/net/if_tun.c:315 if_clone_destroy(ffff80002b2745c0) at if_clone_destroy+0x132 sys/net/if.c:1384 tun_dev_close(44002802,81) at tun_dev_close+0x141 sys/net/if_tun.c:521 spec_close(ffff80002b2746a0) at spec_close+0x2c7 sys/kern/spec_vnops.c:541 VOP_CLOSE(fffffd806777d948,81,fffffd807f7d78f0,ffff8000216d4800) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b80f3d8,ffff8000216d4800) at vn_closefile+0xd6 vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b80f3d8,ffff8000216d4800) at vn_closefile+0xd6 sys/kern/vfs_vnops.c:609 fdrop(fffffd806b80f3d8,ffff8000216d4800) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd806b80f3d8,ffff8000216d4800) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff8000216d4800) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff8000216d4800,0,0,1) at exit1+0x367 sys/kern/kern_exit.c:199 sys_exit(ffff8000216d4800,ffff80002b274940,ffff80002b274990) at sys_exit+0x1a sys/kern/kern_exit.c:89 end trace frame: 0xffff80002b274a00, 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 "sc->sc_dev == 0" failed: file "/syzkaller/managers/main/kernel/sys/net/if_tun.c", line 315 ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82780000) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff827fd334,ffffffff8283409e,13b,ffffffff82814215) at __assert+0x29 sys/kern/subr_prf.c:157 tun_clone_destroy(ffff800000d5d800) at tun_clone_destroy+0x234 sys/net/if_tun.c:315 if_clone_destroy(ffff80002b2745c0) at if_clone_destroy+0x132 sys/net/if.c:1384 tun_dev_close(44002802,81) at tun_dev_close+0x141 sys/net/if_tun.c:521 spec_close(ffff80002b2746a0) at spec_close+0x2c7 sys/kern/spec_vnops.c:541 VOP_CLOSE(fffffd806777d948,81,fffffd807f7d78f0,ffff8000216d4800) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b80f3d8,ffff8000216d4800) at vn_closefile+0xd6 vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b80f3d8,ffff8000216d4800) at vn_closefile+0xd6 sys/kern/vfs_vnops.c:609 fdrop(fffffd806b80f3d8,ffff8000216d4800) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd806b80f3d8,ffff8000216d4800) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff8000216d4800) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff8000216d4800,0,0,1) at exit1+0x367 sys/kern/kern_exit.c:199 sys_exit(ffff8000216d4800,ffff80002b274940,ffff80002b274990) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002b274a10) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d9809d422b0, count: -16 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002b274450 rbx 0xffffffff8255d290 tunclose rdx 0 rcx 0 rax 0xffff8000216d4800 r8 0 r9 0x8080808080808080 r10 0xc16601c67d7fa68c r11 0xd3550ec1d91d6308 r12 0 r13 0 r14 0 r15 0x1 rip 0xffffffff81721bdc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002b274440 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb> show proc PROC (syz-executor.2) tid=520197 pid=40775 tcnt=1 stat=onproc flags process=1008 proc=2000 runpri=8, usrpri=85, slppri=8, nice=20 wchan=0x0, wmesg=, ps_single=0xffff8000216d4800 forw=0xffffffffffffffff, list=0xffff8000216d6010,0xffff8000216d3d70 process=0xffff80002b27d3c0 user=0xffff80002b26f000, vmspace=0xfffffd8069b30740 estcpu=35, cpticks=5, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 30060 501827 21779 0 2 0 syz-executor.0 30060 433437 21779 0 2 0x4000000 syz-executor.0 30060 114372 21779 0 3 0x4000000 inode syz-executor.0 30060 452359 21779 0 2 0x4000000 syz-executor.0 30060 148146 21779 0 2 0x4000000 syz-executor.0 30060 22038 21779 0 2 0x4000000 syz-executor.0 62725 112865 22042 0 3 0x80 nanoslp syz-executor.5 62725 177990 22042 0 3 0x4000080 rest syz-executor.5 62725 255146 22042 0 3 0x4000080 fsleep syz-executor.5 92295 430088 14260 0 3 0x80 nanoslp syz-executor.1 92295 131383 14260 0 2 0x4000000 syz-executor.1 92295 461706 14260 0 3 0x4000080 fsleep syz-executor.1 38767 311060 87490 0 2 0x2 syz-executor.3 42244 516290 87490 0 3 0x82 nanoslp syz-executor.2 52545 72001 87490 0 2 0x2 syz-executor.6 21779 307668 87490 0 3 0x82 nanoslp syz-executor.0 4101 101063 87490 0 2 0x2 syz-executor.4 14260 75481 87490 0 3 0x82 nanoslp syz-executor.1 23083 403824 87490 0 2 0x2 syz-executor.7 22042 362551 87490 0 3 0x82 nanoslp syz-executor.5 76434 489935 0 0 3 0x14280 nfsidl nfsio 74017 289976 0 0 3 0x14280 nfsidl nfsio 87107 26608 0 0 3 0x14280 nfsidl nfsio 2353 417290 0 0 3 0x14280 nfsidl nfsio 88822 266975 0 0 3 0x14280 nfsidl nfsio 34747 158354 0 0 3 0x14280 nfsidl nfsio 57598 38177 0 0 3 0x14280 nfsidl nfsio 4485 248816 0 0 3 0x14280 nfsidl nfsio 96941 180710 0 0 3 0x14280 nfsidl nfsio 54730 447106 0 0 3 0x14280 nfsidl nfsio 52835 331422 0 0 3 0x14280 nfsidl nfsio 10872 327053 0 0 3 0x14280 nfsidl nfsio 47308 448788 0 0 3 0x14280 nfsidl nfsio 31737 16886 0 0 3 0x14280 nfsidl nfsio 72612 239157 0 0 3 0x14280 nfsidl nfsio 37452 273433 0 0 3 0x14280 nfsidl nfsio 79586 41940 0 0 3 0x14280 nfsidl nfsio 32164 124153 0 0 3 0x14280 nfsidl nfsio 38554 108734 0 0 3 0x14280 nfsidl nfsio 4495 143376 0 0 3 0x14280 nfsidl nfsio 58056 405088 0 0 3 0x14200 bored sosplice 87490 332322 14168 0 3 0x2000082 wait syz-fuzzer 87490 150479 14168 0 3 0x6000082 thrsleep syz-fuzzer 87490 360982 14168 0 3 0x6000082 wait syz-fuzzer 87490 496444 14168 0 3 0x6000082 wait syz-fuzzer 87490 434033 14168 0 3 0x6000082 thrsleep syz-fuzzer 87490 143161 14168 0 3 0x6000082 thrsleep syz-fuzzer 87490 128945 14168 0 3 0x6000082 wait syz-fuzzer 87490 187029 14168 0 3 0x6000082 wait syz-fuzzer 87490 47421 14168 0 3 0x6000082 thrsleep syz-fuzzer 87490 162970 14168 0 3 0x6000082 kqread syz-fuzzer 87490 147682 14168 0 3 0x6000082 thrsleep syz-fuzzer 87490 474285 14168 0 3 0x6000082 wait syz-fuzzer 87490 481293 14168 0 3 0x6000082 wait syz-fuzzer 87490 186724 14168 0 3 0x6000082 wait syz-fuzzer 14168 467362 67597 0 3 0x10008a sigsusp ksh 67597 494245 83833 0 3 0x9a kqread sshd 81008 78392 1 0 3 0x100083 ttyin getty 83833 252075 1 0 3 0x88 kqread sshd 5865 456038 12659 73 3 0x1100090 kqread syslogd 12659 45280 1 0 3 0x100082 netio syslogd 17968 416768 1 0 3 0x100080 kqread resolvd 60232 289186 67902 77 3 0x100092 kqread dhcpleased 72484 180997 67902 77 3 0x100092 kqread dhcpleased 67902 86061 1 0 3 0x80 kqread dhcpleased 76200 407030 0 0 3 0x14200 bored smr 54596 449406 0 0 2 0x14200 zerothread 79203 227296 0 0 3 0x14200 aiodoned aiodoned 10553 522055 0 0 3 0x14200 syncer update 83105 97360 0 0 3 0x14200 cleaner cleaner 15136 489168 0 0 3 0x14200 reaper reaper 85536 396288 0 0 3 0x14200 pgdaemon pagedaemon 85220 510704 0 0 3 0x14200 bored viomb 44963 323512 0 0 3 0x40014200 acpi0 acpi0 60254 152964 0 0 3 0x14200 bored softnet3 26014 319814 0 0 3 0x14200 bored softnet2 4710 291175 0 0 3 0x14200 bored softnet1 94809 80373 0 0 3 0x14200 bored softnet0 1607 335938 0 0 3 0x14200 bored systqmp 70276 359693 0 0 3 0x14200 bored systq 99396 229264 0 0 3 0x40014200 bored softclock 30605 319930 0 0 3 0x40014200 idle0 1 442553 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10194 6545K 7706K 78643K 19017 0 pcb 13 10K 12K 78643K 260 0 rtable 237 7K 7K 78643K 775 0 pf 32 9K 9K 78643K 143 0 ifaddr 44 11K 12K 78643K 138 0 ifgroup 55 2K 2K 78643K 224 0 sysctl 3 0K 0K 78643K 3 0 counters 29 17K 17K 78643K 78 0 ioctlops 0 0K 2K 78643K 96 0 iov 0 0K 14K 78643K 279 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1417 89K 89K 78643K 3065 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 82 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 77K 78643K 1576 0 sigio 0 0K 0K 78643K 7 0 proc 56 58K 83K 78643K 893 0 subproc 104 6K 6K 78643K 282 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 50 0 in_multi 99 7K 7K 78643K 271 0 ether_multi 1 0K 0K 78643K 11 0 mrt 1 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 109 493K 493K 78643K 109 0 exec 0 0K 1K 78643K 616 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 322 82K 85K 78643K 15913 0 UVM aobj 15 2K 2K 78643K 15 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 41 0 NDP 12 0K 2K 78643K 103 0 temp 74 5912K 6040K 78643K 19217 0 kqueue 12 18K 30K 78643K 148 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 93 0 90 1 0 1 1 0 8 0 rtentry 112 258 0 148 4 0 4 4 0 8 0 unpcb 144 1048 0 1035 12 11 1 6 0 8 0 syncache 304 20 0 20 4 4 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 127 0 127 5 5 0 1 0 8 0 tcpcb 808 513 0 501 22 14 8 9 0 8 5 arp 88 44 0 26 1 0 1 1 0 8 0 inpcb 336 1075 0 1060 25 18 7 8 0 8 4 nd6 104 67 0 43 1 0 1 1 0 8 0 kcovpl 48 21 0 13 1 0 1 1 0 8 0 ppxss 1160 20 0 20 4 4 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1050 0 595 40 11 29 29 0 8 0 art_table 32 1051 0 595 5 1 4 4 0 8 0 art_node 16 257 0 157 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 1 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 76 0 66 1 0 1 1 0 8 0 shmpl 112 12 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3191 0 1742 91 0 91 91 0 8 0 ffsino 240 3192 0 1742 86 0 86 86 0 8 0 nchpl 144 5333 0 4851 63 41 22 63 0 8 0 uvmvnodes 80 4957 0 0 102 0 102 102 0 8 0 vnodes 216 4957 0 0 276 0 276 276 0 8 0 namei 1024 20942 0 20937 10 9 1 3 0 8 0 kstatmem 264 122 0 98 2 0 2 2 0 8 0 scxspl 216 28507 0 28507 14 13 1 8 1 8 1 plimitpl 152 286 0 271 1 0 1 1 0 8 0 sigapl 424 1857 0 1795 10 2 8 8 0 8 0 futexpl 64 13680 0 13678 5 4 1 1 0 8 0 knotepl 120 31277 0 31197 11 7 4 10 0 8 1 kqueuepl 184 177 0 169 1 0 1 1 0 8 0 pipepl 288 664 0 636 26 19 7 11 0 8 5 fdescpl 432 1820 0 1795 5 1 4 4 0 8 0 filepl 120 11189 0 10949 32 20 12 15 0 8 4 lockfpl 104 1202 0 1199 2 1 1 2 0 8 0 lockfspl 48 501 0 498 1 0 1 1 0 8 0 sessionpl 144 36 0 20 1 0 1 1 0 8 0 pgrppl 48 43 0 27 1 0 1 1 0 8 0 ucredpl 104 981 0 971 1 0 1 1 0 8 0 zombiepl 144 1796 0 1795 2 1 1 1 0 8 0 processpl 1008 1857 0 1795 12 3 9 9 0 8 0 procpl 680 3892 0 3808 14 6 8 9 0 8 0 sosppl 168 24 0 24 3 3 0 1 0 8 0 sockpl 456 2219 0 2188 75 62 13 20 0 8 7 mcl64k 65536 80 0 80 6 5 1 1 0 8 1 mcl16k 16384 50 0 50 7 7 0 1 0 8 0 mcl12k 12288 65 0 65 6 5 1 1 0 8 1 mcl9k 9216 20 0 20 6 6 0 1 0 8 0 mcl8k 8192 152 0 152 7 6 1 1 0 8 1 mcl4k 4096 180 0 180 5 4 1 1 0 8 1 mcl2k2 2112 12 0 12 6 6 0 1 0 8 0 mcl2k 2048 67397 0 67350 35 22 13 26 0 8 6 mtagpl 96 361 0 355 9 4 5 8 0 8 4 mbufpl 256 121491 0 121318 88 65 23 69 0 8 7 bufpl 288 7837 0 1438 458 0 458 458 0 8 0 anonpl 24 339755 0 327790 128 31 97 108 0 188 7 amapchunkpl 152 51972 0 51151 61 23 38 47 0 158 3 amappl16 200 7667 0 7290 36 15 21 33 0 8 0 amappl15 192 16 0 16 2 2 0 1 0 8 0 amappl14 184 198 0 185 2 0 2 2 0 8 0 amappl13 176 15 0 15 2 2 0 1 0 8 0 amappl12 168 2665 0 2638 2 0 2 2 0 8 0 amappl11 160 52 0 39 1 0 1 1 0 8 0 amappl10 152 46 0 35 1 0 1 1 0 8 0 amappl9 144 155 0 155 6 6 0 1 0 8 0 amappl8 136 222 0 162 3 0 3 3 0 8 0 amappl7 128 65 0 52 1 0 1 1 0 8 0 amappl6 120 308 0 291 2 1 1 2 0 8 0 amappl5 112 240 0 230 1 0 1 1 0 8 0 amappl4 104 628 0 593 2 0 2 2 0 8 0 amappl3 96 10780 0 10705 5 2 3 3 0 8 0 amappl2 88 2047 0 1988 3 1 2 3 0 8 0 amappl1 80 15792 0 15287 23 12 11 22 0 8 0 amappl 88 15296 0 15084 6 0 6 6 0 92 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 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 72 14 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1820 0 1795 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1820 0 1795 1 0 1 1 0 8 0 vmmpekpl 168 19609 0 19557 3 0 3 3 0 8 0 vmmpepl 168 134766 0 132696 182 71 111 128 0 357 8 vmsppl 368 1819 0 1795 3 0 3 3 0 8 0 rwobjpl 24 43108 0 36752 41 2 39 39 0 8 0 pdppl 4096 3647 0 3590 183 118 65 71 0 8 8 pvpl 32 1134706 0 1117109 448 241 207 331 0 265 37 pmappl 216 1819 0 1795 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1113 0 306 24 0 24 24 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82780000) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff827fd334,ffffffff8283409e,13b,ffffffff82814215) at __assert+0x29 sys/kern/subr_prf.c:157 tun_clone_destroy(ffff800000d5d800) at tun_clone_destroy+0x234 sys/net/if_tun.c:315 if_clone_destroy(ffff80002b2745c0) at if_clone_destroy+0x132 sys/net/if.c:1384 tun_dev_close(44002802,81) at tun_dev_close+0x141 sys/net/if_tun.c:521 spec_close(ffff80002b2746a0) at spec_close+0x2c7 sys/kern/spec_vnops.c:541 VOP_CLOSE(fffffd806777d948,81,fffffd807f7d78f0,ffff8000216d4800) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b80f3d8,ffff8000216d4800) at vn_closefile+0xd6 vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b80f3d8,ffff8000216d4800) at vn_closefile+0xd6 sys/kern/vfs_vnops.c:609 fdrop(fffffd806b80f3d8,ffff8000216d4800) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd806b80f3d8,ffff8000216d4800) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff8000216d4800) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff8000216d4800,0,0,1) at exit1+0x367 sys/kern/kern_exit.c:199 sys_exit(ffff8000216d4800,ffff80002b274940,ffff80002b274990) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002b274a10) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d9809d422b0, count: -16 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82780000) at panic+0x165 sys/kern/subr_prf.c:198 __assert(ffffffff827fd334,ffffffff8283409e,13b,ffffffff82814215) at __assert+0x29 sys/kern/subr_prf.c:157 tun_clone_destroy(ffff800000d5d800) at tun_clone_destroy+0x234 sys/net/if_tun.c:315 if_clone_destroy(ffff80002b2745c0) at if_clone_destroy+0x132 sys/net/if.c:1384 tun_dev_close(44002802,81) at tun_dev_close+0x141 sys/net/if_tun.c:521 spec_close(ffff80002b2746a0) at spec_close+0x2c7 sys/kern/spec_vnops.c:541 VOP_CLOSE(fffffd806777d948,81,fffffd807f7d78f0,ffff8000216d4800) at VOP_CLOSE+0xe2 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806b80f3d8,ffff8000216d4800) at vn_closefile+0xd6 vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd806b80f3d8,ffff8000216d4800) at vn_closefile+0xd6 sys/kern/vfs_vnops.c:609 fdrop(fffffd806b80f3d8,ffff8000216d4800) at fdrop+0xcb sys/kern/kern_descrip.c:1274 closef(fffffd806b80f3d8,ffff8000216d4800) at closef+0x11b sys/kern/kern_descrip.c:1258 fdfree(ffff8000216d4800) at fdfree+0xf3 sys/kern/kern_descrip.c:1190 exit1(ffff8000216d4800,0,0,1) at exit1+0x367 sys/kern/kern_exit.c:199 sys_exit(ffff8000216d4800,ffff80002b274940,ffff80002b274990) at sys_exit+0x1a sys/kern/kern_exit.c:89 syscall(ffff80002b274a10) at syscall+0x4a8 sys/arch/amd64/amd64/trap.c:623 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7d9809d422b0, count: -16