*cpu0: uvm_fault(0xfffffd806bed9d38, 0x0, 0, 1) -> e ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x72875ccd6530, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff80003980a780 rbx 0 rdx 0 rcx 0xffff80003c42e2b8 rax 0x2a r8 0xffff80003980a6b0 r9 0 r10 0xd7f6c6b3323b38d1 r11 0x5be682c828b2a180 r12 0 r13 0 r14 0 r15 0 rip 0xffffffff82c6e4c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff80003980a700 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x680 ddb{1}> show proc PROC (syz-executor) tid=227060 pid=57530 tcnt=1 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c42ea68,0xffffffff838f0860 process=0xffff80003c424e18 user=0xffff800039805000, vmspace=0xfffffd806bed91f8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND *57530 227060 621 0 7 0 syz-executor 13242 281770 39923 0 2 0 syz-executor 13242 23750 39923 0 3 0x4000080 fsleep syz-executor 45314 397474 16209 0 3 0x80 nanoslp syz-executor 45314 333368 16209 0 3 0x4000080 fsleep syz-executor 45314 507138 16209 0 3 0x4000080 fsleep syz-executor 68002 181697 98643 60928 3 0x90 nanoslp syz-executor 68002 314886 98643 60928 3 0x4000090 kqread syz-executor 68002 3356 98643 60928 3 0x4000090 fsleep syz-executor 68002 6461 98643 60928 3 0x4000090 fsleep syz-executor 98643 340128 84847 0 3 0x82 nanoslp syz-executor 32490 514832 84847 0 2 0x2 syz-executor 69263 123494 84847 0 3 0x82 nanoslp syz-executor 16209 119462 84847 0 3 0x82 nanoslp syz-executor 68625 471954 84847 0 3 0x82 nanoslp syz-executor 39923 461871 84847 0 2 0x2 syz-executor 94872 33847 84847 0 3 0x82 nanoslp syz-executor 621 18827 84847 0 3 0x82 nanoslp syz-executor 84847 492874 89763 0 3 0x82 kqread syz-executor 89763 85254 27365 0 3 0x10008a sigsusp ksh 27365 501906 28151 0 3 0x98 kqread sshd-session 28151 2020 69224 0 3 0x92 kqread sshd-session 77356 180230 1 0 3 0x100083 ttyin getty 69224 398557 1 0 3 0x88 kqread sshd 51927 376754 93034 74 3 0x1100092 bpf pflogd 93034 135869 1 0 3 0x80 sbwait pflogd 918 76311 8880 73 3 0x1100090 kqread syslogd 8880 15468 1 0 3 0x100082 sbwait syslogd 44640 464856 1 0 3 0x100080 kqread resolvd 6455 24712 38206 77 3 0x100092 kqread dhcpleased 17836 513409 38206 77 3 0x100092 kqread dhcpleased 38206 343607 1 0 3 0x80 kqread dhcpleased 25588 391672 0 0 3 0x14200 bored smr 50113 85835 0 0 3 0x14200 pgzero zerothread 68611 154934 0 0 3 0x14200 aiodoned aiodoned 77833 229610 0 0 3 0x14200 syncer update 39877 519813 0 0 3 0x14200 cleaner cleaner 6281 53902 0 0 3 0x14200 reaper reaper 43207 375459 0 0 3 0x14200 pgdaemon pagedaemon 64183 176693 0 0 3 0x14200 bored viomb 88874 92082 0 0 3 0x40014200 acpi0 acpi0 93591 481274 0 0 3 0x40014200 idle1 29506 228776 0 0 3 0x14200 bored softnet3 98669 478267 0 0 3 0x14200 bored softnet2 14253 66423 0 0 3 0x14200 bored softnet1 79213 315823 0 0 2 0x14200 softnet0 90545 329477 0 0 3 0x14200 bored systqmp 93238 171066 0 0 3 0x14200 bored systq 7256 294178 0 0 3 0x14200 tmoslp softclockmp 6682 301617 0 0 3 0x40014200 tmoslp softclock 26384 181289 0 0 3 0x40014200 idle0 1 200796 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd80088ba988) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x50e pmap_enter_pv sys/arch/amd64/amd64/pmap.c:1094 [inline] #3 pmap_enter+0x50e sys/arch/amd64/amd64/pmap.c:2881 #4 uvm_fault_upper_lookup+0x327 sys/uvm/uvm_fault.c:-1 #5 uvm_fault+0x159 sys/uvm/uvm_fault.c:671 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8069192d10) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_upper_lookup+0x327 sys/uvm/uvm_fault.c:-1 #5 uvm_fault+0x159 sys/uvm/uvm_fault.c:671 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 57530 (syz-executor) thread 0xffff80003c42e2b8 (227060) exclusive rwlock amaplk r = 0 (0xfffffd806d5cb928) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_write+0x3ea sys/kern/kern_rwlock.c:316 #2 uvm_fault_check+0x54c sys/uvm/uvm_fault.c:844 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:666 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd806bed92f8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3af sys/kern/kern_rwlock.c:405 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1860 #3 uvm_fault_check+0x4b sys/uvm/uvm_fault.c:730 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:666 #5 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #6 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #7 recall_trap+0x8 exclusive mutex &(curpg)->mdpage.pv_mtx r = 0 (0xfffffd80088ba988) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x50e pmap_enter_pv sys/arch/amd64/amd64/pmap.c:1094 [inline] #3 pmap_enter+0x50e sys/arch/amd64/amd64/pmap.c:2881 #4 uvm_fault_upper_lookup+0x327 sys/uvm/uvm_fault.c:-1 #5 uvm_fault+0x159 sys/uvm/uvm_fault.c:671 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8069192d10) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1160 #1 mtx_enter_try+0x178 sys/kern/kern_lock.c:-1 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2770 #4 uvm_fault_upper_lookup+0x327 sys/uvm/uvm_fault.c:-1 #5 uvm_fault+0x159 sys/uvm/uvm_fault.c:671 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10223 11268K 11354K 166960K 11396 0 pcb 17 12K 12K 166960K 30 0 rtable 231 7K 7K 166960K 360 0 pf 37 18K 21K 166960K 52 0 ifaddr 43 7K 7K 166960K 46 0 ifgroup 57 2K 2K 166960K 57 0 sysctl 1 1K 1K 166960K 1 0 counters 66 36K 36K 166960K 66 0 ioctlops 0 0K 4K 166960K 1500 0 iov 0 0K 12K 166960K 73 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1408 89K 89K 166960K 1512 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 3 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 93K 166960K 221 0 sigio 0 0K 0K 166960K 3 0 proc 72 91K 164K 166960K 536 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 15 0 in_multi 98 7K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 380 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 235 159K 167K 166960K 3893 0 UVM aobj 7 4K 4K 166960K 8 0 pinsyscall 42 84K 104K 166960K 1339 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 0K 166960K 11 0 NDP 13 0K 2K 166960K 29 0 temp 37 8682K 8746K 166960K 4656 0 kqueue 17 23K 28K 166960K 46 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 26 0 0 1 0 1 1 0 8 0 rtpcb 120 73 0 70 2 0 2 2 0 8 1 rtentry 176 111 0 4 5 0 5 5 0 8 0 unpcb 144 64 0 45 1 0 1 1 0 8 0 syncache 336 3 0 3 1 0 1 1 0 8 1 tcpcb 808 26 0 22 1 0 1 1 0 8 0 arp 128 18 0 0 1 0 1 1 0 8 0 inpcb 384 130 0 119 2 0 2 2 0 8 0 nd6 144 24 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 1 0 0 1 0 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 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 24 0 0 1 0 1 1 0 8 0 pfstkey 128 24 0 0 1 0 1 1 0 8 0 pfstate 384 24 0 0 3 0 3 3 0 8 0 pfrule 1344 23 0 16 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 453 0 6 29 0 29 29 0 8 0 art_table 32 454 0 6 4 0 4 4 0 8 0 art_node 16 110 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1724 0 213 95 0 95 95 0 8 0 ffsino 288 1724 0 213 109 0 109 109 0 8 0 nchpl 144 2041 0 348 63 0 63 63 0 8 0 uvmvnodes 80 1931 0 0 40 0 40 40 0 8 0 vnodes 216 1931 0 0 108 0 108 108 0 8 0 namei 1024 6434 0 6434 2 0 2 2 0 8 2 percpumem 16 48 0 0 1 0 1 1 0 8 0 kstatmem 264 26 0 0 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 6481 0 6481 3 2 1 2 1 8 1 plimitpl 152 69 0 52 1 0 1 1 0 8 0 sigapl 424 531 0 482 7 0 7 7 0 8 1 futexpl 64 1624 0 1619 1 0 1 1 0 8 0 knotepl 120 311 0 0 10 0 10 10 0 8 0 kqueuepl 224 98 0 53 3 0 3 3 0 8 0 pipepl 336 124 0 93 3 0 3 3 0 8 0 fdescpl 520 513 0 482 3 0 3 3 0 8 0 filepl 160 2176 0 1906 14 0 14 14 0 8 2 lockfpl 104 34 0 32 1 0 1 1 0 8 0 lockfspl 48 17 0 15 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 32 0 15 1 0 1 1 0 8 0 ucredpl 104 163 0 147 1 0 1 1 0 8 0 zombiepl 144 485 0 482 1 0 1 1 0 8 0 processpl 1192 531 0 482 5 0 5 5 0 8 0 procpl 656 698 0 643 6 0 6 6 0 8 0 sockpl 728 268 0 235 7 0 7 7 0 8 4 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 3 0 0 1 0 1 1 0 8 0 mcl4k 4096 130 0 0 17 0 17 17 0 8 0 mcl2k 2048 12 0 0 2 0 2 2 0 8 0 mtagpl 96 7 0 0 1 0 1 1 0 8 0 mbufpl 256 285 0 0 18 0 18 18 0 8 0 bufpl 280 2473 0 118 169 0 169 169 0 8 0 anonpl 32 7779 0 0 63 0 63 63 0 246 0 amapchunkpl 152 10480 0 10014 22 0 22 22 0 158 1 amappl16 200 1250 0 1226 16 1 15 15 0 8 12 amappl15 192 5 0 4 1 0 1 1 0 8 0 amappl14 184 112 0 100 1 0 1 1 0 8 0 amappl13 176 4 0 4 1 1 0 1 0 8 0 amappl12 168 1177 0 1146 3 1 2 2 0 8 0 amappl11 160 53 0 39 1 0 1 1 0 8 0 amappl10 152 4 0 3 1 0 1 1 0 8 0 amappl9 144 256 0 256 1 1 0 1 0 8 0 amappl8 136 18 0 16 1 0 1 1 0 8 0 amappl7 128 108 0 96 1 0 1 1 0 8 0 amappl6 120 183 0 180 1 0 1 1 0 8 0 amappl5 112 121 0 111 1 0 1 1 0 8 0 amappl4 104 332 0 313 1 0 1 1 0 8 0 amappl3 96 1842 0 1736 4 0 4 4 0 8 0 amappl2 88 640 0 578 2 0 2 2 0 8 0 amappl1 80 8671 0 8075 14 0 14 14 0 8 1 amappl 88 3170 0 3008 5 0 5 5 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 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 513 0 482 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 513 0 482 1 0 1 1 0 8 0 vmmpekpl 168 5907 0 5860 3 0 3 3 0 8 0 vmmpepl 168 38386 0 36452 100 0 100 100 0 357 12 vmsppl 480 512 0 482 5 0 5 5 0 8 1 rwobjpl 72 14703 0 11865 56 0 56 56 0 8 2 pdppl 4096 1033 0 964 101 30 71 85 0 8 2 pvpl 32 14926 0 0 121 0 121 121 0 265 0 pmappl 256 512 0 482 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 391 0 32 11 0 11 11 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83806ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_write_1(3f8,0,6e) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:774 comcnputc(800,6e) at comcnputc+0x1ab bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,6e) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(6e) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 db_printf(ffffffff83371796) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c415f50) at db_ktrap+0x101 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80003c415f50) at db_ktrap+0x101 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c415f50) at kerntrap+0x1dc sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001495000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff8000ffff0cf0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff0cf0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 end trace frame: 0xffff80003c4160f0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83806ff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 x86_bus_space_io_write_1(3f8,0,6e) at x86_bus_space_io_write_1+0x40 sys/arch/amd64/amd64/bus_space.c:774 comcnputc(800,6e) at comcnputc+0x1ab bus_space_barrier machine/bus.h:481 [inline] comcnputc(800,6e) at comcnputc+0x1ab sys/dev/ic/com.c:1263 cnputc(6e) at cnputc+0x61 sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x65c sys/ddb/db_output.c:155 kprintf() at kprintf+0x843 sys/kern/subr_prf.c:-1 db_printf(ffffffff83371796) at db_printf+0x9b sys/kern/subr_prf.c:-1 db_ktrap(6,0,ffff80003c415f50) at db_ktrap+0x101 db_printtrap sys/arch/amd64/amd64/db_interface.c:99 [inline] db_ktrap(6,0,ffff80003c415f50) at db_ktrap+0x101 sys/arch/amd64/amd64/db_interface.c:128 kerntrap(ffff80003c415f50) at kerntrap+0x1dc sys/arch/amd64/amd64/trap.c:323 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b dt_ioctl_record_stop(ffff800001495000) at dt_ioctl_record_stop+0xf0 sys/dev/dt/dt_dev.c:579 dtclose(11e5f,81,2000,ffff8000ffff0cf0) at dtclose+0x105 dt_pcb_purge sys/dev/dt/dt_dev.c:-1 [inline] dtclose(11e5f,81,2000,ffff8000ffff0cf0) at dtclose+0x105 sys/dev/dt/dt_dev.c:232 spec_close(ffff80003c416100) at spec_close+0x45f sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd805d00d010,81,fffffd807f7d3548,ffff8000ffff0cf0) at VOP_CLOSE+0x133 sys/kern/vfs_vops.c:156 vn_closefile(fffffd805da11558,ffff8000ffff0cf0) at vn_closefile+0x12b vn_close sys/kern/vfs_vnops.c:292 [inline] vn_closefile(fffffd805da11558,ffff8000ffff0cf0) at vn_closefile+0x12b sys/kern/vfs_vnops.c:615 fdrop(fffffd805da11558,ffff8000ffff0cf0) at fdrop+0x126 sys/kern/kern_descrip.c:1265 closef(fffffd805da11558,ffff8000ffff0cf0) at closef+0x192 sys/kern/kern_descrip.c:1249 fdfree(ffff8000ffff0cf0) at fdfree+0x116 sys/kern/kern_descrip.c:1181 exit1(ffff8000ffff0cf0,0,0,1) at exit1+0x58f sys/kern/kern_exit.c:214 sys_exit(ffff8000ffff0cf0,ffff80003c416470,ffff80003c4163c0) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80003c416470) at syscall+0xb08 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c416470) at syscall+0xb08 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x78f9d498d720, count: -24 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x680 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x72875ccd6530, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x72875ccd6530, count: -1