uvm_fault(0xffffffff82c71320, 0x7fba76dc3ff8, 0, 2) -> e kernel: page fault trap, code=2 Stopped at pmap_page_remove+0x30d: xchgq %rax,0(%r15,%rcx,1) TID PID UID PRFLAGS PFLAGS CPU COMMAND *265606 39917 0 0x14000 0x200 0 reaper pmap_page_remove(fffffd80067c1780) at pmap_page_remove+0x30d _atomic_swap_64 machine/atomic.h:117 [inline] pmap_page_remove(fffffd80067c1780) at pmap_page_remove+0x30d sys/arch/amd64/amd64/pmap.c:1984 uvm_anfree_list(fffffd8069600a20,ffff8000216322b8) at uvm_anfree_list+0x98 amap_wipeout(fffffd806b737170) at amap_wipeout+0x1c1 sys/uvm/uvm_amap.c:504 uvm_unmap_detach(ffff800021632380,1) at uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1366 uvm_map_teardown(fffffd80702d12e8) at uvm_map_teardown+0x28f sys/uvm/uvm_map.c:2587 uvmspace_free(fffffd80702d12e8) at uvmspace_free+0x96 sys/uvm/uvm_map.c:3503 reaper(ffff800021634548) at reaper+0x15d sys/kern/kern_exit.c:458 end trace frame: 0x0, count: 8 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: uvm_fault(0xffffffff82c71320, 0x7fba76dc3ff8, 0, 2) -> e ddb> trace pmap_page_remove(fffffd80067c1780) at pmap_page_remove+0x30d _atomic_swap_64 machine/atomic.h:117 [inline] pmap_page_remove(fffffd80067c1780) at pmap_page_remove+0x30d sys/arch/amd64/amd64/pmap.c:1984 uvm_anfree_list(fffffd8069600a20,ffff8000216322b8) at uvm_anfree_list+0x98 amap_wipeout(fffffd806b737170) at amap_wipeout+0x1c1 sys/uvm/uvm_amap.c:504 uvm_unmap_detach(ffff800021632380,1) at uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1366 uvm_map_teardown(fffffd80702d12e8) at uvm_map_teardown+0x28f sys/uvm/uvm_map.c:2587 uvmspace_free(fffffd80702d12e8) at uvmspace_free+0x96 sys/uvm/uvm_map.c:3503 reaper(ffff800021634548) at reaper+0x15d sys/kern/kern_exit.c:458 end trace frame: 0x0, count: -7 ddb> show registers rdi 0 rsi 0 rbp 0xffff800021632260 rbx 0 rdx 0 rcx 0x7f8000000000 rax 0 r8 0 r9 0 r10 0xc095109198c891ec r11 0x5f697c917d76fd80 r12 0x7fbfc0000000 r13 0xfffffd80697b41c0 r14 0x800000007f7cb000 r15 0x3a76dc3ff8 rip 0xffffffff826d65dd pmap_page_remove+0x30d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff8000216321d0 ss 0x10 pmap_page_remove+0x30d: xchgq %rax,0(%r15,%rcx,1) ddb> show proc PROC (reaper) tid=265606 pid=39917 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=86, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff8000215ead38,0xffff800021633ab8 process=0xffff8000ffffcbd8 user=0xffff80002162d000, vmspace=0xffffffff82c71320 estcpu=36, cpticks=74, pctcpu=20.36, user=0, sys=23, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 86807 44286 0 0 3 0x14280 nfsidl nfsio 47647 291684 0 0 3 0x14280 nfsidl nfsio 6100 434567 0 0 3 0x14280 nfsidl nfsio 57353 98168 0 0 3 0x14280 nfsidl nfsio 2400 402321 0 0 3 0x14280 nfsidl nfsio 90133 376765 0 0 3 0x14280 nfsidl nfsio 46930 238 0 0 3 0x14280 nfsidl nfsio 80358 161371 0 0 3 0x14280 nfsidl nfsio 54527 47051 0 0 3 0x14280 nfsidl nfsio 92198 196463 0 0 3 0x14280 nfsidl nfsio 43438 311151 0 0 3 0x14280 nfsidl nfsio 7784 409303 0 0 3 0x14280 nfsidl nfsio 83817 388101 0 0 3 0x14280 nfsidl nfsio 55530 245402 0 0 3 0x14280 nfsidl nfsio 88875 89000 0 0 3 0x14280 nfsidl nfsio 6613 91939 0 0 3 0x14280 nfsidl nfsio 41638 451344 0 0 3 0x14280 nfsidl nfsio 58129 78920 0 0 3 0x14280 nfsidl nfsio 35010 168219 0 0 3 0x14280 nfsidl nfsio 65490 92943 0 0 3 0x14280 nfsidl nfsio 42672 338432 0 0 3 0x14200 bored sosplice 77033 20682 88742 0 3 0x82 wait syz-executor.6 78051 309690 88742 0 3 0x82 wait syz-executor.4 66796 156536 88742 0 3 0x82 wait syz-executor.2 88742 401025 96686 0 3 0x2000002 inode syz-fuzzer 88742 263930 96686 0 2 0x6000482 syz-fuzzer 88742 260397 96686 0 2 0x6000002 syz-fuzzer 88742 130927 96686 0 3 0x6000082 wait syz-fuzzer 88742 137786 96686 0 3 0x6000082 wait syz-fuzzer 88742 391960 96686 0 3 0x6000082 thrsleep syz-fuzzer 88742 389098 96686 0 3 0x6000082 thrsleep syz-fuzzer 88742 402356 96686 0 3 0x6000082 thrsleep syz-fuzzer 88742 515999 96686 0 3 0x6000082 wait syz-fuzzer 88742 500062 96686 0 3 0x6000002 inode syz-fuzzer 88742 367015 96686 0 3 0x6000082 thrsleep syz-fuzzer 88742 113396 96686 0 3 0x6000082 wait syz-fuzzer 88742 515982 96686 0 3 0x6000082 thrsleep syz-fuzzer 88742 241196 96686 0 3 0x6000082 wait syz-fuzzer 96686 513770 35145 0 3 0x10008a sigsusp ksh 35145 167099 46218 0 3 0x9a kqread sshd 18131 483350 1 0 3 0x100083 ttyin getty 46218 406026 1 0 3 0x88 kqread sshd 73750 105395 70444 73 2 0x1100010 syslogd 70444 403347 1 0 3 0x100082 netio syslogd 24326 240319 1 0 3 0x100080 kqread resolvd 34743 190699 22603 77 3 0x100092 kqread dhcpleased 96689 338135 22603 77 3 0x100092 kqread dhcpleased 22603 61276 1 0 3 0x80 kqread dhcpleased 67815 369476 0 0 3 0x14200 bored smr 79595 310922 0 0 2 0x14200 zerothread 44088 350548 0 0 3 0x14200 aiodoned aiodoned 23781 498425 0 0 3 0x14200 syncer update 35215 455734 0 0 3 0x14200 cleaner cleaner *39917 265606 0 0 7 0x14200 reaper 39025 433597 0 0 3 0x14200 pgdaemon pagedaemon 98853 90857 0 0 3 0x14200 bored viomb 7072 217931 0 0 3 0x40014200 acpi0 acpi0 75243 291516 0 0 3 0x14200 bored softnet3 38731 354361 0 0 3 0x14200 bored softnet2 50821 52442 0 0 3 0x14200 bored softnet1 77485 127349 0 0 3 0x14200 bored softnet0 7399 433454 0 0 3 0x14200 bored systqmp 22740 430755 0 0 3 0x14200 bored systq 26830 385697 0 0 3 0x40014200 tmoslp softclock 16285 94804 0 0 3 0x40014200 idle0 1 117439 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 10169 6469K 8148K 78643K 12513 0 pcb 13 8K 8K 78643K 104 0 rtable 146 4K 7K 78643K 417 0 pf 24 8K 9K 78643K 34 0 ifaddr 28 8K 11K 78643K 50 0 ifgroup 39 1K 2K 78643K 59 0 sysctl 2 0K 0K 78643K 2 0 counters 25 17K 17K 78643K 30 0 ioctlops 0 0K 2K 78643K 38 0 iov 0 0K 8K 78643K 64 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1288 81K 81K 78643K 1820 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 135 0 dirhash 12 2K 3K 78643K 51 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 6 17K 65K 78643K 1749 0 sigio 0 0K 0K 78643K 7 0 proc 57 59K 83K 78643K 510 0 subproc 52 3K 6K 78643K 121 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 67 0 in_multi 55 4K 7K 78643K 110 0 ether_multi 1 0K 0K 78643K 1 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 426 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 256 54K 90K 78643K 17202 0 UVM aobj 3 2K 2K 78643K 3 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 110 0 NDP 8 0K 2K 78643K 31 0 temp 32 5907K 6094K 78643K 9956 0 kqueue 12 18K 26K 78643K 121 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 68 0 65 1 0 1 1 0 8 0 rtentry 112 127 0 61 4 0 4 4 0 8 0 unpcb 144 613 0 600 3 2 1 2 0 8 0 syncache 312 99 0 99 3 3 0 1 0 8 0 tcpqe 32 230 0 230 6 6 0 1 0 8 0 tcpcb 808 490 0 470 9 5 4 7 0 8 0 arp 88 21 0 11 1 0 1 1 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 4 0 4 1 1 0 1 0 8 0 inpcb 336 1022 0 999 9 6 3 7 0 8 0 nd6 104 31 0 19 1 0 1 1 0 8 0 pkpcb 40 21 0 21 2 2 0 1 0 8 0 kcovpl 48 9 0 5 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 520 0 243 29 6 23 29 0 8 0 art_table 32 521 0 243 4 0 4 4 0 8 0 art_node 16 126 0 66 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 0 1 0 1 1 0 8 0 semapl 112 133 0 123 1 0 1 1 0 8 0 dirhash 1024 43 0 26 3 0 3 3 0 8 0 dino2pl 256 3789 0 2345 92 0 92 92 0 8 0 ffsino 240 3789 0 2345 86 0 86 86 0 8 0 nchpl 144 5931 0 4300 63 0 63 63 0 8 0 uvmvnodes 80 4171 0 0 86 0 86 86 0 8 0 vnodes 216 4171 0 0 232 0 232 232 0 8 0 namei 1024 16334 0 16331 7 6 1 2 0 8 0 kstatmem 264 26 0 10 2 0 2 2 0 8 0 scxspl 216 19733 0 19733 10 9 1 8 1 8 1 plimitpl 152 122 0 109 1 0 1 1 0 8 0 sigapl 424 2068 0 2008 8 0 8 8 0 8 0 futexpl 64 13913 0 13913 3 3 0 1 0 8 0 knotepl 120 16382 0 16322 4 0 4 4 0 8 0 kqueuepl 184 177 0 169 1 0 1 1 0 8 0 pipepl 288 174 0 156 5 3 2 3 0 8 0 fdescpl 432 2031 0 2014 4 0 4 4 0 8 0 filepl 120 6591 0 6437 8 0 8 8 0 8 0 lockfpl 104 492 0 490 1 0 1 1 0 8 0 lockfspl 48 183 0 181 1 0 1 1 0 8 0 sessionpl 144 24 0 11 1 0 1 1 0 8 0 pgrppl 48 28 0 15 1 0 1 1 0 8 0 ucredpl 104 833 0 823 1 0 1 1 0 8 0 zombiepl 144 2015 0 2008 1 0 1 1 0 8 0 processpl 1008 2068 0 2008 10 1 9 9 0 8 0 procpl 680 3971 0 3892 10 2 8 8 0 8 0 sosppl 168 45 0 45 2 2 0 1 0 8 0 sockpl 456 1724 0 1685 15 7 8 12 0 8 0 mcl64k 65536 217 0 217 3 3 0 2 0 8 0 mcl16k 16384 60 0 60 1 1 0 1 0 8 0 mcl12k 12288 64 0 64 1 1 0 1 0 8 0 mcl9k 9216 44 0 44 2 2 0 1 0 8 0 mcl8k 8192 57 0 57 2 2 0 1 0 8 0 mcl4k 4096 75 0 75 1 1 0 1 0 8 0 mcl2k2 2112 10 0 10 1 1 0 1 0 8 0 mcl2k 2048 23483 0 23424 39 28 11 29 0 8 0 mtagpl 96 175 0 113 5 1 4 4 0 8 0 mbufpl 256 95307 0 95100 235 199 36 173 0 8 2 bufpl 288 9032 0 2583 461 0 461 461 0 8 0 anonpl 24 432810 0 419482 362 76 286 346 0 188 188 amapchunkpl 152 60030 0 58931 155 25 130 146 0 158 78 amappl16 200 9504 0 9363 60 52 8 59 0 8 0 amappl15 192 7 0 7 1 1 0 1 0 8 0 amappl14 184 155 0 143 2 1 1 2 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 2670 0 2647 2 0 2 2 0 8 0 amappl11 160 62 0 51 1 0 1 1 0 8 0 amappl10 152 33 0 27 1 0 1 1 0 8 0 amappl9 144 185 0 184 1 0 1 1 0 8 0 amappl8 136 214 0 159 2 0 2 2 0 8 0 amappl7 128 227 0 208 2 0 2 2 0 8 0 amappl6 120 273 0 263 1 0 1 1 0 8 0 amappl5 112 138 0 129 1 0 1 1 0 8 0 amappl4 104 425 0 404 2 1 1 2 0 8 0 amappl3 96 11323 0 11253 3 0 3 3 0 8 0 amappl2 88 2536 0 2470 3 1 2 3 0 8 0 amappl1 80 15018 0 14529 22 10 12 22 0 8 0 amappl 88 16648 0 16486 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 2 0 0 1 0 1 1 0 8 0 uaddrrnd 24 2031 0 2009 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2031 0 2009 1 0 1 1 0 8 0 vmmpekpl 168 17472 0 17421 3 0 3 3 0 8 0 vmmpepl 168 134618 0 132919 145 43 102 128 0 357 18 vmsppl 368 2030 0 2008 3 0 3 3 0 8 0 rwobjpl 24 42854 0 37638 35 1 34 35 0 8 0 pdppl 4096 4069 0 4016 105 52 53 65 0 8 0 pvpl 32 1000208 0 989282 688 294 394 657 0 265 265 pmappl 216 2030 0 2008 2 0 2 2 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1107 0 319 28 0 28 28 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace pmap_page_remove(fffffd80067c1780) at pmap_page_remove+0x30d _atomic_swap_64 machine/atomic.h:117 [inline] pmap_page_remove(fffffd80067c1780) at pmap_page_remove+0x30d sys/arch/amd64/amd64/pmap.c:1984 uvm_anfree_list(fffffd8069600a20,ffff8000216322b8) at uvm_anfree_list+0x98 amap_wipeout(fffffd806b737170) at amap_wipeout+0x1c1 sys/uvm/uvm_amap.c:504 uvm_unmap_detach(ffff800021632380,1) at uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1366 uvm_map_teardown(fffffd80702d12e8) at uvm_map_teardown+0x28f sys/uvm/uvm_map.c:2587 uvmspace_free(fffffd80702d12e8) at uvmspace_free+0x96 sys/uvm/uvm_map.c:3503 reaper(ffff800021634548) at reaper+0x15d sys/kern/kern_exit.c:458 end trace frame: 0x0, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace pmap_page_remove(fffffd80067c1780) at pmap_page_remove+0x30d _atomic_swap_64 machine/atomic.h:117 [inline] pmap_page_remove(fffffd80067c1780) at pmap_page_remove+0x30d sys/arch/amd64/amd64/pmap.c:1984 uvm_anfree_list(fffffd8069600a20,ffff8000216322b8) at uvm_anfree_list+0x98 amap_wipeout(fffffd806b737170) at amap_wipeout+0x1c1 sys/uvm/uvm_amap.c:504 uvm_unmap_detach(ffff800021632380,1) at uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1366 uvm_map_teardown(fffffd80702d12e8) at uvm_map_teardown+0x28f sys/uvm/uvm_map.c:2587 uvmspace_free(fffffd80702d12e8) at uvmspace_free+0x96 sys/uvm/uvm_map.c:3503 reaper(ffff800021634548) at reaper+0x15d sys/kern/kern_exit.c:458 end trace frame: 0x0, count: -7