panic: pool_do_get: fdescpl free list modified: page 0xfffffd8066762000; item addr 0xfffffd8066762bb0; offset 0x48=0xdead4113 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *164462 25962 32767 0x10 0 0K syz-executor.0 288035 97521 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82602af8) at panic+0x177 sys/kern/subr_prf.c:202 pool_do_get(ffffffff82b766e0,9,ffff800022c40768) at pool_do_get+0x474 sys/kern/subr_pool.c:741 pool_get(ffffffff82b766e0,9) at pool_get+0xe9 sys/kern/subr_pool.c:584 fdcopy(ffff8000ffff8008) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline] fdcopy(ffff8000ffff8008) at fdcopy+0x44 sys/kern/kern_descrip.c:1111 process_new(ffff800023678008,ffff8000ffff8008,1) at process_new+0x13b sys/kern/kern_fork.c:259 fork1(ffff8000fffef7a0,1,ffffffff814b49c0,0,ffff800022c409a0,0) at fork1+0x30b sys/kern/kern_fork.c:383 syscall(ffff800022c40a10) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022c40a10) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd7e30, count: 6 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: pool_do_get: fdescpl free list modified: page 0xfffffd8066762000; item addr 0xfffffd8066762bb0; offset 0x48=0xdead4113 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82602af8) at panic+0x177 sys/kern/subr_prf.c:202 pool_do_get(ffffffff82b766e0,9,ffff800022c40768) at pool_do_get+0x474 sys/kern/subr_pool.c:741 pool_get(ffffffff82b766e0,9) at pool_get+0xe9 sys/kern/subr_pool.c:584 fdcopy(ffff8000ffff8008) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline] fdcopy(ffff8000ffff8008) at fdcopy+0x44 sys/kern/kern_descrip.c:1111 process_new(ffff800023678008,ffff8000ffff8008,1) at process_new+0x13b sys/kern/kern_fork.c:259 fork1(ffff8000fffef7a0,1,ffffffff814b49c0,0,ffff800022c409a0,0) at fork1+0x30b sys/kern/kern_fork.c:383 syscall(ffff800022c40a10) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022c40a10) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd7e30, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800022c405b0 rbx 0xffffffff8299ac5f cpu_info_full_primary+0x2c5f rdx 0 rcx 0 rax 0xffff8000fffef7a0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x7f1f51cf6550f64c r11 0x31502c41956f2ba4 r12 0xffffffff8299aa60 cpu_info_full_primary+0x2a60 r13 0 r14 0 r15 0x1 rip 0xffffffff81995478 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022c405a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=164462 stat=onproc flags process=10 proc=0 pri=77, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff8000fffef260,0xffff8000fffeea90 process=0xffff8000ffff8008 user=0xffff800022c3b000, vmspace=0xfffffd807effd8a0 estcpu=36, cpticks=1, pctcpu=0.2 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 59641 107814 8764 32767 2 0x10 syz-executor.4 59641 289194 8764 32767 2 0x4000010 syz-executor.4 85030 66053 20127 32767 2 0x10 syz-executor.6 85030 375304 20127 32767 2 0x4000010 syz-executor.6 18962 173757 17113 32767 2 0x10 syz-executor.3 18962 90112 17113 32767 3 0x4000090 fsleep syz-executor.3 18962 419066 17113 32767 3 0x4000090 fsleep syz-executor.3 31689 374442 68213 32767 2 0x10 syz-executor.5 31689 366956 68213 32767 2 0x4000010 syz-executor.5 8764 457655 52395 32767 2 0x490 syz-executor.4 52395 498369 21891 0 3 0x82 wait syz-executor.4 29510 19637 0 0 3 0x14200 bored sosplice 17113 358201 59876 32767 2 0x10 syz-executor.3 59876 479195 21891 0 3 0x82 wait syz-executor.3 20127 258581 41944 32767 2 0x490 syz-executor.6 41944 206755 21891 0 3 0x82 wait syz-executor.6 6755 404541 48082 32767 2 0x490 syz-executor.7 48082 276164 21891 0 3 0x82 wait syz-executor.7 68213 117768 41750 32767 3 0x90 nanoslp syz-executor.5 41750 325902 21891 0 3 0x82 wait syz-executor.5 47705 200547 3845 32767 2 0x490 syz-executor.2 19393 230129 17157 32767 2 0x490 syz-executor.1 3845 398961 21891 0 3 0x82 wait syz-executor.2 *25962 164462 51161 32767 7 0x10 syz-executor.0 17157 467981 21891 0 3 0x82 wait syz-executor.1 51161 307640 21891 0 3 0x82 wait syz-executor.0 21891 97232 50837 0 3 0x82 thrsleep syz-fuzzer 21891 381453 50837 0 2 0x4000482 syz-fuzzer 21891 425008 50837 0 3 0x4000082 thrsleep syz-fuzzer 21891 28505 50837 0 3 0x4000082 kqread syz-fuzzer 21891 206519 50837 0 3 0x4000082 thrsleep syz-fuzzer 21891 395391 50837 0 3 0x4000082 thrsleep syz-fuzzer 21891 425522 50837 0 3 0x4000082 thrsleep syz-fuzzer 21891 355858 50837 0 3 0x4000082 thrsleep syz-fuzzer 21891 205286 50837 0 3 0x4000082 thrsleep syz-fuzzer 50837 212120 74453 0 3 0x10008a sigsusp ksh 74453 523809 86727 0 3 0x9a kqread sshd 16570 8001 1 0 3 0x100083 ttyin getty 86727 494848 1 0 3 0x88 kqread sshd 8795 266449 6073 73 3 0x1100090 kqread syslogd 6073 118117 1 0 3 0x100082 netio syslogd 80850 358975 1 0 3 0x100080 kqread resolvd 28705 413948 6063 77 3 0x100092 kqread dhcpleased 31279 497377 6063 77 3 0x100092 kqread dhcpleased 6063 67266 1 0 3 0x80 kqread dhcpleased 26399 166628 0 0 3 0x14200 bored smr 88140 264364 0 0 2 0x14200 zerothread 64571 160839 0 0 3 0x14200 aiodoned aiodoned 69730 439768 0 0 3 0x14200 syncer update 49333 518109 0 0 3 0x14200 cleaner cleaner 97521 288035 0 0 7 0x14200 reaper 97051 287118 0 0 3 0x14200 pgdaemon pagedaemon 51039 515671 0 0 3 0x14200 bored viomb 34103 118798 0 0 3 0x40014200 acpi0 acpi0 19684 330290 0 0 3 0x40014200 idle1 13428 94627 0 0 3 0x14200 bored softnet 80245 134602 0 0 3 0x14200 bored softnet 27720 498667 0 0 3 0x14200 bored softnet 86836 437773 0 0 3 0x14200 bored softnet 68992 121708 0 0 3 0x14200 fdlock systqmp 32048 162722 0 0 3 0x14200 bored systq 11400 342117 0 0 2 0x40014200 softclock 29284 462115 0 0 3 0x40014200 idle0 1 487948 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex fdescpl r = 0 (0xffffffff82b766f0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbd sys/kern/subr_pool.c:581 #4 fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline] #4 fdcopy+0x44 sys/kern/kern_descrip.c:1111 #5 process_new+0x13b sys/kern/kern_fork.c:259 #6 fork1+0x30b sys/kern/kern_fork.c:383 #7 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #7 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #8 Xsyscall+0x128 CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c8189d0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_do_remove+0x8b rcr3 machine/cpufunc.h:141 [inline] #3 pmap_do_remove+0x8b pmap_map_ptes sys/arch/amd64/amd64/pmap.c:414 [inline] #3 pmap_do_remove+0x8b sys/arch/amd64/amd64/pmap.c:1769 #4 uvm_unmap_kill_entry_withlock+0x1af sys/uvm/uvm_map.c:2139 #5 uvm_map_teardown+0x197 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:176 [inline] #5 uvm_map_teardown+0x197 sys/uvm/uvm_map.c:2771 #6 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 #7 reaper+0x19a sys/kern/kern_exit.c:454 #8 proc_trampoline+0x1c Process 25962 (syz-executor.0) thread 0xffff8000fffef7a0 (164462) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82b9f538) #0 witness_lock+0x44d #1 syscall+0x3ef mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x3ef sys/arch/amd64/amd64/trap.c:585 #2 Xsyscall+0x128 exclusive mutex fdescpl r = 0 (0xffffffff82b766f0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbd sys/kern/subr_pool.c:581 #4 fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline] #4 fdcopy+0x44 sys/kern/kern_descrip.c:1111 #5 process_new+0x13b sys/kern/kern_fork.c:259 #6 fork1+0x30b sys/kern/kern_fork.c:383 #7 syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] #7 syscall+0x489 sys/arch/amd64/amd64/trap.c:585 #8 Xsyscall+0x128 Process 68992 (systqmp) thread 0xffff8000210e8d20 (121708) shared rwlock systqmp r = 0 (0xffffffff829b2810) #0 witness_lock+0x44d #1 taskq_thread+0xca sys/kern/kern_task.c:445 #2 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10190 6410K 6420K 78643K 11290 0 pcb 13 10K 12K 78643K 15 0 rtable 238 6K 7K 78643K 497 0 ifaddr 81 16K 16K 78643K 103 0 sysctl 2 0K 0K 78643K 2 0 counters 56 35K 35K 78643K 62 0 ioctlops 0 0K 2K 78643K 47 0 iov 0 0K 24K 78643K 471 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1270 79K 79K 78643K 1641 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 18 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 473 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 22 81K 121K 78643K 1960 0 sigio 0 0K 0K 78643K 79 0 proc 56 78K 115K 78643K 652 0 subproc 104 6K 6K 78643K 143 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 433 0 in_multi 99 6K 6K 78643K 139 0 ether_multi 1 0K 0K 78643K 1 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 139 625K 625K 78643K 139 0 exec 0 0K 2K 78643K 951 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 7 26K 26K 78643K 7 0 UVM amap 247 84K 90K 78643K 13259 0 UVM aobj 131 4K 4K 78643K 137 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 70 0 NDP 11 0K 2K 78643K 36 0 temp 124 4730K 4794K 78643K 8403 0 kqueue 13 20K 26K 78643K 166 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> 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 91 0 88 1 0 1 1 0 8 0 rtentry 112 147 0 35 4 0 4 4 0 8 0 unpcb 136 1674 0 1659 19 18 1 5 0 8 0 syncache 296 29 0 29 6 6 0 1 0 8 0 tcpqe 32 69 0 69 5 5 0 1 0 8 0 tcpcb 736 675 0 664 28 26 2 13 0 8 0 arp 120 24 0 6 1 0 1 1 0 8 0 inpcb 312 1600 0 1588 23 19 4 11 0 8 2 nd6 48 36 0 10 1 0 1 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 596 0 134 29 0 29 29 0 8 0 art_table 32 597 0 134 4 0 4 4 0 8 0 art_node 16 146 0 44 1 0 1 1 0 8 0 sysvmsgpl 40 48 0 43 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 471 0 461 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3868 0 2434 91 0 91 91 0 8 0 ffsino 272 3868 0 2434 97 0 97 97 0 8 0 nchpl 144 6498 0 4861 63 0 63 63 0 8 0 uvmvnodes 80 4020 0 0 83 0 83 83 0 8 0 vnodes 224 4020 0 0 237 0 237 237 0 8 0 namei 1024 22099 0 22099 2 1 1 2 0 8 1 percpumem 16 43 0 3 1 0 1 1 0 8 0 kstatmem 264 28 0 6 2 0 2 2 0 8 0 scxspl 216 23096 0 23096 15 14 1 8 0 8 1 plimitpl 152 636 0 614 2 1 1 2 0 8 0 sigapl 424 2232 0 2178 7 0 7 7 0 8 0 futexpl 64 16824 0 16822 1 0 1 1 0 8 0 knotepl 120 333 0 0 10 0 10 10 0 8 0 kqueuepl 216 2440 0 2431 31 23 8 8 0 8 7 pipepl 336 1130 0 1102 41 33 8 13 0 8 5 fdescpl 496 2214 0 2181 7 1 6 6 0 8 0 pool(0xffffffff82b766e0:fdescpl): page inconsistency: page 0xfffffd8066762000; 3 on list, 4 missing, 8 items per page filepl 152 16207 0 15972 57 41 16 25 0 8 5 lockfpl 104 132 0 130 1 0 1 1 0 8 0 lockfspl 48 61 0 59 1 0 1 1 0 8 0 sessionpl 144 26 0 10 1 0 1 1 0 8 0 pgrppl 48 31 0 15 1 0 1 1 0 8 0 ucredpl 96 2443 0 2425 1 0 1 1 0 8 0 zombiepl 144 2181 0 2178 1 0 1 1 0 8 0 processpl 1064 2233 0 2178 5 1 4 5 0 8 0 procpl 672 5915 0 5847 12 5 7 8 0 8 0 sosppl 168 29 0 29 6 5 1 1 0 8 1 sockpl 480 3410 0 3380 98 90 8 29 0 8 3 mcl64k 65536 16 0 0 2 0 2 2 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 6 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 14 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 147 0 0 18 0 18 18 0 8 0 mtagpl 96 3 0 0 1 0 1 1 0 8 0 mbufpl 256 464 0 0 24 0 24 24 0 8 0 bufpl 288 6905 0 578 453 0 453 453 0 8 0 anonpl 24 430298 0 418149 124 33 91 110 0 186 0 amapchunkpl 152 49507 0 48921 49 23 26 38 0 158 1 amappl16 200 5853 0 5525 37 19 18 36 0 8 0 amappl15 192 3 0 0 1 0 1 1 0 8 0 amappl14 184 15 0 13 1 0 1 1 0 8 0 amappl13 176 102 0 98 1 0 1 1 0 8 0 amappl12 168 559 0 553 1 0 1 1 0 8 0 amappl11 160 94 0 76 1 0 1 1 0 8 0 amappl10 152 475 0 467 1 0 1 1 0 8 0 amappl9 144 1107 0 1098 1 0 1 1 0 8 0 amappl8 136 858 0 790 3 0 3 3 0 8 0 amappl7 128 365 0 354 1 0 1 1 0 8 0 amappl6 120 831 0 801 2 1 1 2 0 8 0 amappl5 112 1856 0 1837 1 0 1 1 0 8 0 amappl4 104 891 0 867 2 0 2 2 0 8 0 amappl3 96 6612 0 6556 2 0 2 2 0 8 0 amappl2 88 3046 0 2978 3 1 2 3 0 8 0 amappl1 80 54012 0 53351 19 2 17 19 0 8 0 amappl 88 12703 0 12548 7 2 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 72 136 0 6 3 0 3 3 0 8 0 uaddrrnd 24 2214 0 2181 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2214 0 2181 1 0 1 1 0 8 0 vmmpekpl 168 24098 0 24033 5 1 4 4 0 8 0 vmmpepl 168 217799 0 215310 154 28 126 136 0 357 7 vmsppl 368 2213 0 2180 4 0 4 4 0 8 0 rwobjpl 56 58780 0 53349 78 0 78 78 0 8 0 pdppl 4096 4435 0 4360 167 86 81 93 0 8 6 pvpl 32 948730 0 931584 254 94 160 239 0 265 0 pmappl 248 2213 0 2180 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 993 0 167 25 0 25 25 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82602af8) at panic+0x177 sys/kern/subr_prf.c:202 pool_do_get(ffffffff82b766e0,9,ffff800022c40768) at pool_do_get+0x474 sys/kern/subr_pool.c:741 pool_get(ffffffff82b766e0,9) at pool_get+0xe9 sys/kern/subr_pool.c:584 fdcopy(ffff8000ffff8008) at fdcopy+0x44 fdinit sys/kern/kern_descrip.c:1072 [inline] fdcopy(ffff8000ffff8008) at fdcopy+0x44 sys/kern/kern_descrip.c:1111 process_new(ffff800023678008,ffff8000ffff8008,1) at process_new+0x13b sys/kern/kern_fork.c:259 fork1(ffff8000fffef7a0,1,ffffffff814b49c0,0,ffff800022c409a0,0) at fork1+0x30b sys/kern/kern_fork.c:383 syscall(ffff800022c40a10) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800022c40a10) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd7e30, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020cd8ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff82b9f330) at __mp_lock+0x120 __mp_lock_spin sys/kern/kern_lock.c:117 [inline] __mp_lock(ffffffff82b9f330) at __mp_lock+0x120 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800021139c30,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd806c733010) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd806c733010) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021133a48) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: 7 ddb{1}> trace x86_ipi_db(ffff800020cd8ff0) at x86_ipi_db+0x1a 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+0x23 __mp_lock(ffffffff82b9f330) at __mp_lock+0x120 __mp_lock_spin sys/kern/kern_lock.c:117 [inline] __mp_lock(ffffffff82b9f330) at __mp_lock+0x120 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800021139c30,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd806c733010) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd806c733010) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3684 reaper(ffff800021133a48) at reaper+0x19a sys/kern/kern_exit.c:454 end trace frame: 0x0, count: -8