uvm_fault(0xfffffd800f7b5b90, 0x7fbefc8ddef8, 0, 2) -> e kernel: page fault trap, code=2 Stopped at pmap_page_remove+0x45d: xchgq %rax,0(%r14,%rcx,1) TID PID UID PRFLAGS PFLAGS CPU COMMAND 29732 71984 0 0 0x4000000 0 syz-executor pmap_page_remove(fffffd80088502b0) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline] pmap_page_remove(fffffd80088502b0) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014 uvm_anfree(fffffd806482aec8) at uvm_anfree+0xd8 sys/uvm/uvm_anon.c:111 amap_wipeout(fffffd806ba087a8) at amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1 uvm_unmap_detach(ffff800034bdb770,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd800f7b5b90) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525 exit1(ffff80003bbfc2b8,b,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003bbfc2b8,ffff800034bdb940,ffff800034bdb890) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800034bdb940) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800034bdb940) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7df91bbdfcb0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: uvm_fault(0xfffffd800f7b5b90, 0x7fbefc8ddef8, 0, 2) -> e ddb{1}> trace pmap_page_remove(fffffd80088502b0) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline] pmap_page_remove(fffffd80088502b0) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014 uvm_anfree(fffffd806482aec8) at uvm_anfree+0xd8 sys/uvm/uvm_anon.c:111 amap_wipeout(fffffd806ba087a8) at amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1 uvm_unmap_detach(ffff800034bdb770,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd800f7b5b90) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525 exit1(ffff80003bbfc2b8,b,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003bbfc2b8,ffff800034bdb940,ffff800034bdb890) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800034bdb940) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800034bdb940) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7df91bbdfcb0, count: -9 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800034bdb670 rbx 0xfffffd806471d5f0 rdx 0 rcx 0x7f8000000000 rax 0 r8 0 r9 0x65400 acpi_pdirpa+0x51271 r10 0xea3d20394b40b3f r11 0xa53346c8c39fe816 r12 0 r13 0 r14 0x3efc8ddef8 r15 0xfffffd8008850318 rip 0xffffffff828af21d pmap_page_remove+0x45d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800034bdb5f0 ss 0 pmap_page_remove+0x45d: xchgq %rax,0(%r14,%rcx,1) ddb{1}> show proc PROC (syz-executor) tid=353886 pid=81741 tcnt=0 stat=onproc flags process=1008 proc=2000 runpri=32, usrpri=75, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003bbfc2b8 scnt=-1 ecnt=1 forw=0xffffffffffffffff, list=0xffff8000ffffc7d0,0xffff80003c42f4f8 process=0xffff80002a3c04e8 user=0xffff800034bd6000, vmspace=0xfffffd800f7b5b90 estcpu=25, cpticks=9, pctcpu=0.1, user=0, sys=6, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 71984 492528 22200 0 2 0 syz-executor 71984 453060 22200 0 2 0x4000080 syz-executor 71984 29732 22200 0 7 0x4000000 syz-executor 46600 198634 95210 0 2 0 syz-executor 46600 375096 95210 0 2 0x4000000 syz-executor 83626 87097 31370 0 2 0xc80 syz-executor 83626 125690 31370 0 3 0x4000080 msgwait syz-executor 83626 68613 31370 0 3 0x4000080 fsleep syz-executor 34256 149387 0 0 3 0x14200 acct acct 95945 397892 1 0 3 0x100083 ttyin getty 95210 498857 83849 0 3 0x82 nanoslp syz-executor 31370 521892 83849 0 2 0xc82 syz-executor 53759 410836 83849 0 2 0xc82 syz-executor 659 63441 83849 0 2 0xc82 syz-executor 22200 364216 83849 0 3 0x82 nanoslp syz-executor 73583 276000 83849 0 2 0xc82 syz-executor 84948 302538 83849 0 3 0x82 wait syz-executor 92112 282642 83849 0 3 0x82 wait syz-executor 83849 94214 96247 0 3 0x82 kqread syz-executor 96247 235268 41408 0 3 0x10008a sigsusp ksh 41408 107500 54402 0 3 0x98 kqread sshd-session 54402 28198 74161 0 3 0x92 kqread sshd-session 74161 439848 1 0 3 0x88 kqread sshd 99689 108008 51661 74 3 0x1100092 bpf pflogd 51661 301259 1 0 3 0x80 sbwait pflogd 64931 107708 19450 73 3 0x1100090 kqread syslogd 19450 110535 1 0 3 0x100082 sbwait syslogd 23179 356254 1 0 3 0x100080 kqread resolvd 20762 386335 26480 77 3 0x100092 kqread dhcpleased 95225 507602 26480 77 3 0x100092 kqread dhcpleased 26480 419879 1 0 3 0x80 kqread dhcpleased 97790 146274 0 0 3 0x14200 bored smr 61103 145013 0 0 2 0x14200 zerothread 43418 255492 0 0 3 0x14200 aiodoned aiodoned 30990 429872 0 0 3 0x14200 syncer update 88654 454082 0 0 3 0x14200 cleaner cleaner 334 132022 0 0 3 0x14200 reaper reaper 33243 379608 0 0 3 0x14200 pgdaemon pagedaemon 6171 150338 0 0 3 0x14200 bored viomb 38868 341596 0 0 3 0x40014200 acpi0 acpi0 58908 510572 0 0 3 0x40014200 idle1 38899 227609 0 0 3 0x14200 bored softnet1 39272 421408 0 0 3 0x14200 bored softnet0 8528 216386 0 0 3 0x14200 bored systqmp 36941 6888 0 0 3 0x14200 bored systq 40866 73989 0 0 3 0x14200 tmoslp softclockmp 49506 479554 0 0 3 0x40014200 tmoslp softclock 40580 376564 0 0 3 0x40014200 idle0 1 99142 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd800f8cfd10) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_page_remove+0xca rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_page_remove+0xca pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #2 pmap_page_remove+0xca sys/arch/amd64/amd64/pmap.c:1974 #3 uvm_anfree+0xd8 sys/uvm/uvm_anon.c:111 #4 amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1 #5 uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 #6 uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525 #7 exit1+0x6fc sys/kern/kern_exit.c:260 #8 sys_exit+0x1a sys/kern/kern_exit.c:-1 #9 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #10 Xsyscall+0x128 Process 46600 (syz-executor) thread 0xffff80003bbfdca8 (375096) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10200 11095K 11360K 166960K 11858 0 pcb 18 12K 12K 166960K 104 0 rtable 241 9K 10K 166960K 589 0 pf 34 17K 21K 166960K 90 0 ifaddr 41 7K 7K 166960K 67 0 ifgroup 55 2K 2K 166960K 105 0 sysctl 4 1K 9K 166960K 13 0 counters 70 37K 38K 166960K 132 0 ioctlops 0 0K 4K 166960K 1652 0 iov 0 0K 16K 166960K 35 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1422 89K 89K 166960K 1768 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 6 0 VM map 2 1K 1K 166960K 2 0 sem 8 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 89K 166960K 539 0 sigio 0 0K 0K 166960K 45 0 proc 72 115K 180K 166960K 600 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 32 0 in_multi 89 6K 7K 166960K 106 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 7 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 512 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 261 168K 186K 166960K 6935 0 UVM aobj 50 70K 70K 166960K 52 0 pinsyscall 42 84K 102K 166960K 1670 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 31 0 NDP 12 0K 2K 166960K 46 0 temp 50 8672K 8740K 166960K 29269 0 kqueue 13 20K 30K 166960K 95 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 67 0 64 1 0 1 1 0 8 0 rtentry 176 133 0 30 5 0 5 5 0 8 0 unpcb 144 272 0 254 2 0 2 2 0 8 1 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 107 0 103 1 0 1 1 0 8 0 arp 136 23 0 4 1 0 1 1 0 8 0 inpcb 328 500 0 491 7 5 2 7 0 8 1 nd6 152 26 0 0 1 0 1 1 0 8 0 pkpcb 40 6 0 6 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 26 0 26 1 0 1 1 0 8 1 pppxif 1504 2 0 2 1 0 1 1 0 8 1 pffrag 232 7 0 2 1 0 1 1 0 482 0 pffrnode 88 7 0 2 1 0 1 1 0 8 0 pffrent 40 10 0 5 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 57 0 57 1 1 0 1 0 8 0 pfanchor 1288 1 0 1 1 1 0 1 0 8 0 pftag 88 1 0 0 1 0 1 1 0 8 0 pfstitem 24 42 0 1 1 0 1 1 0 8 0 pfstkey 128 42 0 1 2 0 2 2 0 8 0 pfstate 448 42 0 1 5 0 5 5 0 8 0 pfrule 1344 24 0 19 2 1 1 2 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 503 0 90 29 1 28 29 0 8 1 art_table 40 506 0 90 5 0 5 5 0 8 0 art_node 32 132 0 41 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 1 1 0 1 1 0 8 0 semapl 112 7 0 1 1 0 1 1 0 8 0 shmpl 112 13 0 0 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2342 0 829 96 0 96 96 0 8 0 ffsino 296 2342 0 829 118 0 118 118 0 8 0 nchpl 144 3094 0 1392 64 0 64 64 0 8 0 rtmask 32 9 0 9 1 0 1 1 0 8 1 vnodes 216 2689 0 0 150 0 150 150 0 8 0 namei 1024 10774 0 10774 2 1 1 2 0 8 1 percpumem 16 81 0 31 1 0 1 1 0 8 0 vcpupl 3968 36 0 2 5 0 5 5 0 8 0 vmpool 848 36 0 2 4 0 4 4 0 8 0 pfiaddrpl 120 1 0 1 1 1 0 1 0 8 0 kstatmem 264 60 0 34 3 0 3 3 0 8 1 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 19296 0 19296 10 2 8 8 1 8 8 plimitpl 152 161 0 143 1 0 1 1 0 8 0 sigapl 424 850 0 801 7 1 6 7 0 8 0 knotepl 120 322 0 0 10 0 10 10 0 8 0 kqueuepl 224 148 0 139 2 0 2 2 0 8 1 pipepl 344 221 0 193 9 3 6 9 0 8 3 fdescpl 528 833 0 802 3 0 3 3 0 8 0 filepl 160 4458 0 4229 15 3 12 15 0 8 1 lockfpl 104 191 0 188 1 0 1 1 0 8 0 lockfspl 48 90 0 87 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 107 0 90 1 0 1 1 0 8 0 ucredpl 104 608 0 594 1 0 1 1 0 8 0 zombiepl 144 806 0 801 1 0 1 1 0 8 0 processpl 1232 850 0 801 5 1 4 5 0 8 0 procpl 664 1542 0 1488 6 0 6 6 0 8 0 sosppl 176 1 0 1 1 1 0 1 0 8 0 sockpl 752 861 0 831 11 5 6 11 0 8 2 mcl64k 65536 5 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 119 0 0 15 0 15 15 0 8 0 mcl2k 2048 51 0 0 7 0 7 7 0 8 0 mtagpl 96 32 0 0 1 0 1 1 0 8 0 mbufpl 256 202 0 0 13 0 13 13 0 8 0 bufpl 280 8919 0 2783 439 0 439 439 0 8 0 anonpl 32 9802 0 0 80 0 80 80 0 246 0 amapchunkpl 152 25508 0 24954 37 0 37 37 0 158 11 amappl16 200 4049 0 4009 25 9 16 18 0 8 11 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 13 0 13 2 1 1 1 0 8 1 amappl13 176 496 0 495 1 0 1 1 0 8 0 amappl12 168 1203 0 1161 3 1 2 3 0 8 0 amappl11 160 10 0 10 1 1 0 1 0 8 0 amappl10 152 114 0 100 1 0 1 1 0 8 0 amappl9 144 245 0 245 1 1 0 1 0 8 0 amappl8 136 45 0 43 1 0 1 1 0 8 0 amappl7 128 76 0 74 1 0 1 1 0 8 0 amappl6 120 279 0 265 1 0 1 1 0 8 0 amappl5 112 87 0 76 1 0 1 1 0 8 0 amappl4 104 426 0 395 1 0 1 1 0 8 0 amappl3 96 4100 0 3980 5 1 4 4 0 8 0 amappl2 88 531 0 470 2 0 2 2 0 8 0 amappl1 80 10764 0 10184 14 2 12 14 0 8 0 amappl 88 6132 0 5949 5 0 5 5 0 92 0 uvmvnodes 80 131 0 0 3 0 3 3 0 8 0 dma16384 16384 2 0 2 1 0 1 1 0 8 1 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 128 255 0 255 2 1 1 1 0 8 1 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 51 0 2 1 0 1 1 0 8 0 uaddrrnd 24 833 0 802 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 833 0 802 1 0 1 1 0 8 0 vmmpekpl 168 8639 0 8604 3 0 3 3 0 8 0 vmmpepl 168 61149 0 59204 99 0 99 99 0 357 0 vmsppl 488 832 0 801 5 1 4 5 0 8 0 rwobjpl 80 20061 0 18925 29 0 29 29 0 8 0 pdppl 4096 1745 0 1640 129 23 106 106 0 8 1 pvpl 32 18287 0 0 149 1 148 148 0 265 0 pmappl 256 868 0 803 5 0 5 5 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 316 0 28 9 0 9 9 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8389eff0) 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 __mp_lock(ffffffff838bcd00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838bcd00) at __mp_lock+0x192 sys/kern/kern_lock.c:173 doopenat(ffff80003bbfca80,ffffff9c,200000000440,10,0,ffff80003c471b10) at doopenat+0x345 sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c471bc0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c471bc0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd7480a9c4a0, count: 8 ddb{0}> trace x86_ipi_db(ffffffff8389eff0) 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 __mp_lock(ffffffff838bcd00) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838bcd00) at __mp_lock+0x192 sys/kern/kern_lock.c:173 doopenat(ffff80003bbfca80,ffffff9c,200000000440,10,0,ffff80003c471b10) at doopenat+0x345 sys/kern/vfs_syscalls.c:1138 syscall(ffff80003c471bc0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c471bc0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd7480a9c4a0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at pmap_page_remove+0x45d: xchgq %rax,0(%r14,%rcx,1) pmap_page_remove(fffffd80088502b0) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline] pmap_page_remove(fffffd80088502b0) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014 uvm_anfree(fffffd806482aec8) at uvm_anfree+0xd8 sys/uvm/uvm_anon.c:111 amap_wipeout(fffffd806ba087a8) at amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1 uvm_unmap_detach(ffff800034bdb770,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd800f7b5b90) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525 exit1(ffff80003bbfc2b8,b,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003bbfc2b8,ffff800034bdb940,ffff800034bdb890) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800034bdb940) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800034bdb940) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7df91bbdfcb0, count: 6 ddb{1}> trace pmap_page_remove(fffffd80088502b0) at pmap_page_remove+0x45d _atomic_swap_64 sys/arch/amd64/compile/SYZKALLER/obj/machine/atomic.h:117 [inline] pmap_page_remove(fffffd80088502b0) at pmap_page_remove+0x45d sys/arch/amd64/amd64/pmap.c:2014 uvm_anfree(fffffd806482aec8) at uvm_anfree+0xd8 sys/uvm/uvm_anon.c:111 amap_wipeout(fffffd806ba087a8) at amap_wipeout+0x246 sys/uvm/uvm_amap.c:-1 uvm_unmap_detach(ffff800034bdb770,0) at uvm_unmap_detach+0x8a sys/uvm/uvm_map.c:1353 uvm_map_teardown(fffffd800f7b5b90) at uvm_map_teardown+0x360 sys/uvm/uvm_map.c:2525 exit1(ffff80003bbfc2b8,b,0,1) at exit1+0x6fc sys/kern/kern_exit.c:260 sys_exit(ffff80003bbfc2b8,ffff800034bdb940,ffff800034bdb890) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff800034bdb940) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff800034bdb940) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7df91bbdfcb0, count: -9