witness: lock_object uninitialized: 0xffff800000da9028 Starting stack trace... witness_checkorder(ffff800000da9028,9,0) at witness_checkorder+0x137 witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800000da9028,9,0) at witness_checkorder+0x137 sys/kern/subr_witness.c:777 rw_enter_write(ffff800000da9018) at rw_enter_write+0x5c sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000da9000) at unveil_delete_names+0x34 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:92 [inline] unveil_delete_names(ffff800000da9000) at unveil_delete_names+0x34 sys/kern/kern_unveil.c:102 unveil_destroy(ffff80002127ea00) at unveil_destroy+0xad sys/kern/kern_unveil.c:183 exit1(ffff80002128f088,0,0,3) at exit1+0x3d5 sys/kern/kern_exit.c:220 single_thread_check_locked(ffff80002128f088,0,0) at single_thread_check_locked+0x237 sys/kern/kern_sig.c:2015 userret(ffff80002128f088) at userret+0x7c single_thread_check sys/kern/kern_sig.c:2054 [inline] userret(ffff80002128f088) at userret+0x7c sys/kern/kern_sig.c:1970 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x7069be9c57c0, count: 249 End of stack trace. Stopped at db_enter+0x1c: addq $0x8,%rsp ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff800000da9028,9,0) at witness_checkorder+0x13c witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800000da9028,9,0) at witness_checkorder+0x13c sys/kern/subr_witness.c:777 rw_enter_write(ffff800000da9018) at rw_enter_write+0x5c sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000da9000) at unveil_delete_names+0x34 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:92 [inline] unveil_delete_names(ffff800000da9000) at unveil_delete_names+0x34 sys/kern/kern_unveil.c:102 unveil_destroy(ffff80002127ea00) at unveil_destroy+0xad sys/kern/kern_unveil.c:183 exit1(ffff80002128f088,0,0,3) at exit1+0x3d5 sys/kern/kern_exit.c:220 single_thread_check_locked(ffff80002128f088,0,0) at single_thread_check_locked+0x237 sys/kern/kern_sig.c:2015 userret(ffff80002128f088) at userret+0x7c single_thread_check sys/kern/kern_sig.c:2054 [inline] userret(ffff80002128f088) at userret+0x7c sys/kern/kern_sig.c:1970 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x7069be9c57c0, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800027bb39e0 rbx 0x3 rdx 0 rcx 0xffff80002128f088 rax 0xffff800020d58ff0 r8 0xffff800027bb3980 r9 0x8080808080808080 r10 0x477b7ba00e5f5bce r11 0x7dd684bef925edd r12 0xffff800000da9001 r13 0xffff800000da9028 r14 0 r15 0 rip 0xffffffff8275560c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800027bb39d0 ss 0x10 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.6) pid=12152 stat=onproc flags process=1008 proc=82000 pri=0, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002128d348,0xffff80002128c878 process=0xffff80002127ea00 user=0xffff800027bae000, vmspace=0xfffffd8069909cc8 estcpu=36, cpticks=27, pctcpu=0.0 user=0, sys=8, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 4208 92463 7806 0 7 0 syz-executor.4 4208 188277 7806 0 3 0x4000080 rest syz-executor.4 4208 409079 7806 0 3 0x4000080 fsleep syz-executor.4 79651 103542 41160 0 2 0 syz-executor.0 20081 39422 64213 0 3 0x82 nanoslp syz-executor.6 23634 8446 64213 0 3 0x82 piperd syz-executor.3 79939 381637 64213 0 3 0x82 piperd syz-executor.5 90844 78157 0 0 3 0x14280 nfsidl nfsio 80317 322850 0 0 3 0x14280 nfsidl nfsio 90454 442131 0 0 3 0x14280 nfsidl nfsio 44264 433719 0 0 3 0x14280 nfsidl nfsio 51460 89833 0 0 3 0x14280 nfsidl nfsio 39062 306088 0 0 3 0x14280 nfsidl nfsio 71000 273623 0 0 3 0x14280 nfsidl nfsio 95369 427989 0 0 3 0x14280 nfsidl nfsio 74794 126539 0 0 3 0x14280 nfsidl nfsio 14697 460492 0 0 3 0x14280 nfsidl nfsio 58517 489796 0 0 3 0x14280 nfsidl nfsio 11882 232367 0 0 3 0x14280 nfsidl nfsio 31638 290258 0 0 3 0x14280 nfsidl nfsio 93332 409645 0 0 3 0x14280 nfsidl nfsio 12963 115453 0 0 3 0x14280 nfsidl nfsio 38059 347360 0 0 3 0x14280 nfsidl nfsio 3046 506545 0 0 3 0x14280 nfsidl nfsio 74975 301875 0 0 3 0x14280 nfsidl nfsio 54962 518993 0 0 3 0x14280 nfsidl nfsio 47470 13929 0 0 3 0x14280 nfsidl nfsio 95868 125384 1 0 3 0x100083 ttyin getty 19261 137381 0 0 3 0x14200 acct acct 80262 30391 64213 0 3 0x82 piperd syz-executor.7 3089 178302 0 0 3 0x14200 bored sosplice 92395 332340 52308 0 3 0x100082 netio ndp 52308 499206 1 0 3 0x10008a sigsusp sh 7806 377474 64213 0 3 0x82 nanoslp syz-executor.4 26841 81294 64213 0 2 0x2 syz-executor.1 41160 417004 64213 0 3 0x82 nanoslp syz-executor.0 64213 193553 52707 0 3 0x2000082 wait syz-fuzzer 64213 482768 52707 0 3 0x6000082 nanoslp syz-fuzzer 64213 501359 52707 0 3 0x6000082 thrsleep syz-fuzzer 64213 350779 52707 0 3 0x6000082 kqread syz-fuzzer 64213 90170 52707 0 3 0x6000082 thrsleep syz-fuzzer 64213 197205 52707 0 3 0x6000082 wait syz-fuzzer 64213 96994 52707 0 3 0x6000082 thrsleep syz-fuzzer 64213 312606 52707 0 3 0x6000082 wait syz-fuzzer 64213 63847 52707 0 3 0x6000082 thrsleep syz-fuzzer 64213 440765 52707 0 3 0x6000082 wait syz-fuzzer 64213 375744 52707 0 3 0x6000082 thrsleep syz-fuzzer 64213 402571 52707 0 3 0x6000082 thrsleep syz-fuzzer 64213 121766 52707 0 3 0x6000082 wait syz-fuzzer 64213 111191 52707 0 3 0x6000082 wait syz-fuzzer 64213 392829 52707 0 3 0x6000082 thrsleep syz-fuzzer 64213 125414 52707 0 3 0x6000082 wait syz-fuzzer 52707 379969 72931 0 3 0x10008a sigsusp ksh 72931 312254 63859 0 3 0x9a kqread sshd 63859 317689 1 0 3 0x88 kqread sshd 38441 126459 59556 74 3 0x1100092 bpf pflogd 59556 453773 1 0 3 0x80 netio pflogd 8067 7466 90316 73 3 0x1100090 kqread syslogd 90316 20139 1 0 3 0x100082 netio syslogd 28848 506564 1 0 3 0x100080 kqread resolvd 39719 130912 22241 77 3 0x100092 kqread dhcpleased 19734 256974 22241 77 3 0x100092 kqread dhcpleased 22241 80537 1 0 3 0x80 kqread dhcpleased 54692 6093 0 0 3 0x14200 bored smr 29008 132959 0 0 2 0x14200 zerothread 34181 286748 0 0 3 0x14200 aiodoned aiodoned 77433 156202 0 0 3 0x14200 syncer update 43053 116990 0 0 3 0x14200 cleaner cleaner 92081 4287 0 0 3 0x14200 reaper reaper 73011 221154 0 0 3 0x14200 pgdaemon pagedaemon 515 101696 0 0 3 0x14200 bored viomb 70778 82972 0 0 3 0x40014200 acpi0 acpi0 82104 2484 0 0 3 0x40014200 idle1 72836 303643 0 0 3 0x14200 bored softnet3 57223 393604 0 0 3 0x14200 bored softnet2 36630 318697 0 0 3 0x14200 bored softnet1 71993 399657 0 0 3 0x14200 bored softnet0 16825 29713 0 0 3 0x14200 bored systqmp 98532 251454 0 0 3 0x14200 bored systq 33223 387493 0 0 3 0x40014200 bored softclock 68996 395375 0 0 3 0x40014200 idle0 1 310941 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 79651 (syz-executor.0) thread 0xffff80002128c868 (103542) exclusive rwlock vmmaplk r = 0 (0xfffffd806849f858) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0xfa sys/uvm/uvm_map.c:5345 #3 uvm_map_protect+0xdc uvm_map_addr_RBT_ROOT sys/uvm/uvm_map.h:176 [inline] #3 uvm_map_protect+0xdc uvm_map_entrybyaddr sys/uvm/uvm_map.c:526 [inline] #3 uvm_map_protect+0xdc sys/uvm/uvm_map.c:3135 #4 sys_mprotect+0x25e sys/uvm/uvm_mmap.c:585 #5 syscall+0x606 mi_syscall sys/sys/syscall_mi.h:110 [inline] #5 syscall+0x606 sys/arch/amd64/amd64/trap.c:623 #6 Xsyscall+0x128 Process 26841 (syz-executor.1) thread 0xffff8000211f3b40 (81294) exclusive rwlock vmmaplk r = 0 (0xfffffd807eff9a08) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0xfa sys/uvm/uvm_map.c:5345 #3 uvmspace_fork+0xb6 sys/uvm/uvm_map.c:3903 #4 process_new+0x304 sys/kern/kern_fork.c:262 #5 fork1+0x318 sys/kern/kern_fork.c:383 #6 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #6 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #7 Xsyscall+0x128 exclusive rwlock vmmaplk r = 0 (0xfffffd807eff9bd8) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0xfa sys/uvm/uvm_map.c:5345 #3 uvmspace_fork+0x3b sys/uvm/uvm_map.c:3894 #4 process_new+0x304 sys/kern/kern_fork.c:262 #5 fork1+0x318 sys/kern/kern_fork.c:383 #6 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #6 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #7 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10195 6476K 6946K 78643K 12817 0 pcb 13 14K 17K 78643K 1112 0 rtable 215 6K 7K 78643K 633 0 pf 30 9K 10K 78643K 134 0 ifaddr 41 15K 16K 78643K 116 0 ifgroup 51 2K 2K 78643K 200 0 sysctl 2 0K 0K 78643K 2 0 counters 58 35K 36K 78643K 142 0 ioctlops 0 0K 4K 78643K 1578 0 iov 0 0K 24K 78643K 353 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1306 82K 82K 78643K 2131 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 54 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 197 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 85K 78643K 3065 0 sigio 0 0K 0K 78643K 79 0 proc 76 115K 115K 78643K 910 0 subproc 104 6K 7K 78643K 208 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 270 0 in_multi 88 6K 7K 78643K 207 0 ether_multi 1 0K 0K 78643K 1 0 mrt 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 79 360K 360K 78643K 79 0 exec 0 0K 1K 78643K 580 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 356 80K 90K 78643K 32144 0 UVM aobj 120 4K 4K 78643K 121 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 433 0 NDP 11 0K 2K 78643K 85 0 temp 70 5919K 5996K 78643K 27072 0 kqueue 12 18K 30K 78643K 218 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 198 0 194 4 3 1 3 0 8 0 rtentry 112 206 0 107 4 0 4 4 0 8 0 unpcb 144 1412 0 1397 14 13 1 6 0 8 0 syncache 296 20 0 20 6 5 1 1 0 8 1 tcpqe 32 267 0 267 7 6 1 1 0 8 1 tcpcb 808 1161 0 1153 33 25 8 8 0 8 6 arp 120 35 0 19 1 0 1 1 0 8 0 inpcb 368 3139 0 3128 46 38 8 14 0 8 6 nd6 136 48 0 27 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 1 0 1 0 8 0 kcovpl 48 16 0 8 1 0 1 1 0 8 0 ppxss 1256 14 0 14 4 4 0 1 0 8 0 pffrag 232 44 0 42 4 3 1 1 0 482 0 pffrnode 88 43 0 42 4 3 1 1 0 8 0 pffrent 40 96 0 94 5 4 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 pfstitem 24 108 0 92 1 0 1 1 0 8 0 pfstkey 128 108 0 92 1 0 1 1 0 8 0 pfstate 376 108 0 92 6 2 4 4 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 823 0 406 29 0 29 29 0 8 2 art_table 32 824 0 406 4 0 4 4 0 8 0 art_node 16 199 0 109 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 3 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 195 0 185 1 0 1 1 0 8 0 shmpl 112 118 0 1 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 5227 0 3755 93 0 93 93 0 8 0 ffsino 272 5227 0 3755 99 0 99 99 0 8 0 nchpl 144 9441 0 7798 63 0 63 63 0 8 0 uvmvnodes 80 5729 0 0 117 0 117 117 0 8 0 vnodes 216 5729 0 0 319 0 319 319 0 8 0 namei 1024 29643 0 29643 8 7 1 4 0 8 1 percpumem 16 84 0 42 1 0 1 1 0 8 0 kstatmem 264 106 0 84 2 0 2 2 0 8 0 scxspl 216 31604 0 31604 12 11 1 8 1 8 1 plimitpl 152 140 0 124 1 0 1 1 0 8 0 sigapl 424 3396 0 3329 11 2 9 9 0 8 0 futexpl 64 20273 0 20272 4 3 1 1 0 8 0 knotepl 120 370 0 0 11 0 11 11 0 8 1 kqueuepl 216 1723 0 1715 27 26 1 8 0 8 0 pipepl 320 493 0 465 11 5 6 8 0 8 3 fdescpl 496 3357 0 3330 5 0 5 5 0 8 0 filepl 152 18540 0 18303 47 33 14 20 0 8 3 lockfpl 104 583 0 581 2 1 1 2 0 8 0 lockfspl 48 180 0 178 1 0 1 1 0 8 0 sessionpl 144 34 0 17 1 0 1 1 0 8 0 pgrppl 48 41 0 24 1 0 1 1 0 8 0 ucredpl 104 2079 0 2067 1 0 1 1 0 8 0 zombiepl 144 4634 0 4633 2 1 1 1 0 8 0 processpl 1072 3396 0 3329 6 1 5 5 0 8 0 procpl 696 8392 0 8308 11 1 10 10 0 8 0 srpgc 96 2 0 2 1 1 0 1 0 8 0 sosppl 168 32 0 32 4 3 1 1 0 8 1 sockpl 488 4846 0 4816 93 80 13 26 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 16 0 0 2 0 2 2 0 8 0 mcl12k 12288 19 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 15 0 0 2 0 2 2 0 8 0 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 306 0 0 35 5 30 35 0 8 0 mtagpl 96 33 0 0 1 0 1 1 0 8 0 mbufpl 256 1146 0 0 58 0 58 58 0 8 0 bufpl 288 9196 0 2869 453 0 453 453 0 8 0 anonpl 24 465748 0 454373 128 33 95 106 0 186 0 amapchunkpl 152 102149 0 101309 62 22 40 48 0 158 0 amappl16 200 9741 0 9297 39 14 25 34 0 8 1 amappl15 192 22 0 21 2 1 1 1 0 8 0 amappl14 184 201 0 184 2 1 1 2 0 8 0 amappl13 176 15 0 14 1 0 1 1 0 8 0 amappl12 168 4157 0 4127 3 1 2 2 0 8 0 amappl11 160 58 0 44 1 0 1 1 0 8 0 amappl10 152 33 0 25 2 1 1 1 0 8 0 amappl9 144 317 0 316 2 1 1 1 0 8 0 amappl8 136 354 0 277 3 0 3 3 0 8 0 amappl7 128 98 0 83 2 0 2 2 0 8 0 amappl6 120 356 0 331 2 1 1 2 0 8 0 amappl5 112 265 0 254 1 0 1 1 0 8 0 amappl4 104 692 0 650 3 1 2 3 0 8 0 amappl3 96 19844 0 19764 4 1 3 3 0 8 0 amappl2 88 3672 0 3600 3 1 2 3 0 8 0 amappl1 80 20848 0 20277 23 9 14 23 0 8 0 amappl 88 31466 0 31240 7 0 7 7 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 72 120 0 1 3 0 3 3 0 8 0 uaddrrnd 24 3357 0 3329 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3357 0 3329 1 0 1 1 0 8 0 vmmpekpl 168 29983 0 29908 4 0 4 4 0 8 0 vmmpepl 168 217572 0 215261 205 89 116 132 0 357 0 vmsppl 464 3356 0 3329 5 0 5 5 0 8 0 rwobjpl 56 63625 0 56194 110 4 106 106 0 8 0 pdppl 4096 6722 0 6658 250 176 74 80 0 8 10 pvpl 32 1274013 0 1256725 439 263 176 368 0 265 0 pmappl 248 3356 0 3329 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1125 0 257 25 0 25 25 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp ddb{0}> trace x86_ipi_db(ffffffff82bd4ff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __mp_lock(ffffffff82cf3cd0) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cf3cd0) at __mp_lock+0x122 sys/kern/kern_lock.c:147 intr_handler(ffff800027b5fca0,ffff800000069c00) at intr_handler+0x62 sys/arch/amd64/amd64/intr.c:532 Xintr_ioapic_edge16_untramp() at Xintr_ioapic_edge16_untramp+0x18f __mp_lock(ffffffff82cf3cd0) at __mp_lock+0x12e __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82cf3cd0) at __mp_lock+0x12e sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 end of kernel end trace frame: 0x70b23fc66a60, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 witness_checkorder(ffff800000da9028,9,0) at witness_checkorder+0x13c witness_debugger sys/kern/subr_witness.c:2510 [inline] witness_checkorder(ffff800000da9028,9,0) at witness_checkorder+0x13c sys/kern/subr_witness.c:777 rw_enter_write(ffff800000da9018) at rw_enter_write+0x5c sys/kern/kern_rwlock.c:128 unveil_delete_names(ffff800000da9000) at unveil_delete_names+0x34 unvname_rbt_RBT_MIN sys/kern/kern_unveil.c:92 [inline] unveil_delete_names(ffff800000da9000) at unveil_delete_names+0x34 sys/kern/kern_unveil.c:102 unveil_destroy(ffff80002127ea00) at unveil_destroy+0xad sys/kern/kern_unveil.c:183 exit1(ffff80002128f088,0,0,3) at exit1+0x3d5 sys/kern/kern_exit.c:220 single_thread_check_locked(ffff80002128f088,0,0) at single_thread_check_locked+0x237 sys/kern/kern_sig.c:2015 userret(ffff80002128f088) at userret+0x7c single_thread_check sys/kern/kern_sig.c:2054 [inline] userret(ffff80002128f088) at userret+0x7c sys/kern/kern_sig.c:1970 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x7069be9c57c0, count: -9