panic: kmmaplk rwlock 0xffffffff83accd38: enter read deadlock Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83421a3f) at panic+0x1cf sys/kern/subr_prf.c:198 rw_do_enter_read(ffffffff83accd38,0) at rw_do_enter_read+0x435 sys/kern/kern_rwlock.c:379 uvmfault_lookup(ffff80002a80e4f0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 uvm_fault_check(ffff80002a80e4f0,ffff80002a80e528,ffff80002a80e560,0) at uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 uvm_fault(ffffffff83accc50,ffff800029ee6000,0,2) at uvm_fault+0xe6 sys/uvm/uvm_fault.c:627 kpageflttrap(ffff80002a80e690,ffff800029ee6000) at kpageflttrap+0x2d1 sys/arch/amd64/amd64/trap.c:-1 kerntrap(ffff80002a80e690) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b kcov_remote_enter(0,ffff80002a79c910) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838c7f80,ffff80002a779800) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a779800,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 end trace frame: 0xffff80002a80e8e0, count: 0 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: kmmaplk rwlock 0xffffffff83accd38: enter read deadlock ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83421a3f) at panic+0x1cf sys/kern/subr_prf.c:198 rw_do_enter_read(ffffffff83accd38,0) at rw_do_enter_read+0x435 sys/kern/kern_rwlock.c:379 uvmfault_lookup(ffff80002a80e4f0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 uvm_fault_check(ffff80002a80e4f0,ffff80002a80e528,ffff80002a80e560,0) at uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 uvm_fault(ffffffff83accc50,ffff800029ee6000,0,2) at uvm_fault+0xe6 sys/uvm/uvm_fault.c:627 kpageflttrap(ffff80002a80e690,ffff800029ee6000) at kpageflttrap+0x2d1 sys/arch/amd64/amd64/trap.c:-1 kerntrap(ffff80002a80e690) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b kcov_remote_enter(0,ffff80002a79c910) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838c7f80,ffff80002a779800) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a779800,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 pmap_tlb_shootrange(0,ffff8000304b2000,ffff8000308b2000,1) at pmap_tlb_shootrange+0xe9 sys/arch/amd64/amd64/pmap.c:3361 pmap_do_remove(ffffffff83a82080,ffff8000304b2000,ffff8000308b2000,0) at pmap_do_remove+0x6d2 sys/arch/amd64/amd64/pmap.c:1931 uvm_unmap_kill_entry_withlock(ffffffff83accc50,fffffd806cca39e0,1) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_unmap_remove(ffffffff83accc50,ffff8000304b2000,ffff8000308b2000,ffff80002a80ebf8,0,1,14afca8d57349474) at uvm_unmap_remove+0x6c2 sys/uvm/uvm_map.c:2008 uvm_unmap(ffffffff83accc50,ffff8000304b2000,ffff8000308b2000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline] uvm_unmap(ffffffff83accc50,ffff8000304b2000,ffff8000308b2000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1799 km_free(ffff8000304b2000,400000,ffffffff837861a8,ffffffff83786290) at km_free+0x87 sys/uvm/uvm_km.c:714 kd_free(ffff8000015e04c0) at kd_free+0x84 sys/dev/kcov.c:564 kcovclose(181300,3,2000,ffff80002a779c98) at kcovclose+0xe4 sys/dev/kcov.c:-1 spec_close(ffff80002a80edd0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806cace1f8,3,fffffd8007ffd750,ffff80002a779c98) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806cad0000,ffff80002a779c98) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806cad0000,ffff80002a779c98) at vn_closefile+0x11d sys/kern/vfs_vnops.c:621 fdrop(fffffd806cad0000,ffff80002a779c98) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806cad0000,ffff80002a779c98) at closef+0x190 sys/kern/kern_descrip.c:1265 fdfree(ffff80002a779c98) at fdfree+0x115 sys/kern/kern_descrip.c:1196 exit1(ffff80002a779c98,43,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a779c98,ffff80002a80f130,ffff80002a80f080) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a80f130) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a80f130) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x714431a6e510, count: -34 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80002a80e1f0 rbx 0xffff800029ee6000 rdx 0 rcx 0 rax 0xffff80002a779c98 r8 0x101010101010101 r9 0x8080808080808080 r10 0x3cff9e68d4fc8f56 r11 0x248a26aeacd4e6f6 r12 0 r13 0xffff80002a779c9c r14 0 r15 0x1 rip 0xffffffff82780f75 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80002a80e1e0 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=238423 pid=62170 tcnt=0 stat=onproc flags process=a proc=2000 runpri=17, usrpri=86, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=1 forw=0xffffffffffffffff, list=0xffff80002a7782a8,0xffff80002a736548 process=0xffff80002a79d690 user=0xffff80002a80a000, vmspace=0xfffffd806f5088a8 estcpu=36, cpticks=7, pctcpu=0.1, user=0, sys=1, intr=1 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 35886 209759 57525 0 2 0 syz-executor 35886 419429 57525 0 2 0x4000000 syz-executor 48952 303137 41914 0 3 0x80 nanoslp syz-executor 48952 307637 41914 0 3 0x4000000 smrbar syz-executor 61336 147903 0 0 3 0x14280 nfsidl nfsio 95584 10078 0 0 3 0x14280 nfsidl nfsio 83020 111543 0 0 3 0x14280 nfsidl nfsio 83048 254686 0 0 3 0x14280 nfsidl nfsio 59767 79090 0 0 3 0x14280 nfsidl nfsio 13457 438013 0 0 3 0x14280 nfsidl nfsio 66720 104023 0 0 3 0x14280 nfsidl nfsio 23713 237587 0 0 3 0x14280 nfsidl nfsio 27476 86869 0 0 3 0x14280 nfsidl nfsio 93712 470258 0 0 3 0x14280 nfsidl nfsio 67867 502779 0 0 3 0x14280 nfsidl nfsio 47445 319712 0 0 3 0x14280 nfsidl nfsio 15475 295866 0 0 3 0x14280 nfsidl nfsio 4310 176168 0 0 3 0x14280 nfsidl nfsio 98667 194232 0 0 3 0x14280 nfsidl nfsio 1755 334377 0 0 3 0x14280 nfsidl nfsio 49364 65958 0 0 3 0x14280 nfsidl nfsio 1561 185652 0 0 3 0x14280 nfsidl nfsio 25526 6341 0 0 3 0x14280 nfsidl nfsio 73699 89063 0 0 3 0x14280 nfsidl nfsio 32968 212961 25119 0 3 0x82 piperd syz-executor 18628 450543 25119 0 3 0x82 piperd syz-executor 57525 167135 25119 0 3 0x82 nanoslp syz-executor 24970 330932 25119 0 3 0x82 piperd syz-executor 47874 361101 25119 0 3 0x82 piperd syz-executor 41914 456484 25119 0 3 0x82 nanoslp syz-executor 25119 433471 17489 0 3 0x82 nanoslp syz-executor 17489 72723 19701 0 3 0x10008a sigsusp ksh 19701 364380 55949 0 3 0x98 kqread sshd-session 55949 384987 49816 0 3 0x92 kqread sshd-session 87048 287380 1 0 3 0x100083 ttyin getty 49816 318875 1 0 3 0x88 kqread sshd 45697 61527 75938 73 3 0x1100090 kqread syslogd 75938 329365 1 0 3 0x100082 sbwait syslogd 41178 275905 1 0 3 0x100080 kqread resolvd 75029 496929 53170 77 3 0x100092 kqread dhcpleased 34755 104923 53170 77 3 0x100092 kqread dhcpleased 53170 14590 1 0 3 0x80 kqread dhcpleased 88482 381631 0 0 3 0x14200 bored smr 10314 320705 0 0 2 0x14200 zerothread 23843 507116 0 0 3 0x14200 aiodoned aiodoned 20255 137310 0 0 3 0x14200 syncer update 35215 219485 0 0 3 0x14200 cleaner cleaner 11306 163076 0 0 3 0x14200 reaper reaper 37536 339827 0 0 3 0x14200 pgdaemon pagedaemon 10701 340650 0 0 3 0x14200 bored viomb 34490 286087 0 0 3 0x40014200 acpi0 acpi0 36757 83960 0 0 3 0x14200 bored softnet0 44735 449022 0 0 3 0x14200 bored systqmp 79585 21978 0 0 3 0x14200 bored systq 16069 249036 0 0 3 0x40014200 tmoslp softclock 71184 285459 0 0 3 0x40014200 idle0 1 359968 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 11041 12106K 12433K 166960K 12600 0 pcb 17 16K 18K 166960K 105 0 rtable 195 7K 8K 166960K 407 0 pf 33 13K 17K 166960K 68 0 ifaddr 33 5K 7K 166960K 57 0 ifgroup 48 2K 2K 166960K 75 0 sysctl 3 1K 9K 166960K 10 0 counters 33 17K 18K 166960K 47 0 ioctlops 0 0K 4K 166960K 113 0 iov 0 0K 8K 166960K 74 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1300 82K 82K 166960K 1771 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 20K 24K 166960K 21 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 111 0 dirhash 12 2K 2K 166960K 15 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 11 37K 89K 166960K 523 0 sigio 0 0K 0K 166960K 2 0 proc 60 59K 83K 166960K 537 0 subproc 57 3K 5K 166960K 189 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 36 0 in_multi 66 4K 7K 166960K 108 0 ether_multi 1 0K 0K 166960K 2 0 mrt 0 0K 0K 166960K 12 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 483 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 166 133K 156K 166960K 5987 0 UVM aobj 24 2K 2K 166960K 27 0 pinsyscall 32 64K 92K 166960K 1633 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 10 0 NDP 11 0K 1K 166960K 39 0 temp 70 9115K 9181K 166960K 22135 0 kqueue 14 22K 30K 166960K 99 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 62 0 59 1 0 1 1 0 8 0 rtentry 136 118 0 38 4 0 4 4 0 8 0 unpcb 144 181 0 166 1 0 1 1 0 8 0 syncache 336 7 0 7 1 1 0 1 0 8 0 tcpcb 736 118 0 114 4 3 1 4 0 8 0 arp 96 18 0 6 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 1 1 0 1 1 0 8 0 inpcb 328 562 0 554 21 12 9 15 0 8 8 ip6q 72 1 0 0 1 0 1 1 0 8 0 nd6 112 28 0 12 1 0 1 1 0 8 0 kcovpl 48 21 0 15 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1072 12 0 11 2 1 1 1 0 8 0 pfstscr 40 2 0 0 1 0 1 1 0 8 0 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 2 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 0 1 0 1 1 0 8 0 pfstate 384 1 0 0 1 0 1 1 0 8 0 pfrule 1360 6 0 5 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 487 0 153 30 1 29 30 0 8 5 art_table 40 489 0 153 5 0 5 5 0 8 0 art_node 32 118 0 46 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 64 105 0 95 1 0 1 1 0 8 0 shmpl 112 24 0 3 1 0 1 1 0 8 0 dirhash 1024 19 0 2 3 0 3 3 0 8 0 dino2pl 256 2275 0 805 92 0 92 92 0 8 0 ffsino 256 2275 0 805 92 0 92 92 0 8 0 nchpl 144 2971 0 1269 64 0 64 64 0 8 0 rtmask 32 1 0 1 1 1 0 1 0 8 0 vnodes 216 2608 0 0 145 0 145 145 0 8 0 namei 1024 9732 0 9732 1 0 1 1 0 8 1 acpiwqpl 32 3 0 3 1 0 1 1 1 8 1 kstatmem 264 43 0 20 2 0 2 2 0 8 0 scxspl 216 15965 0 15965 8 7 1 8 1 8 1 plimitpl 152 81 0 65 1 0 1 1 0 8 0 sigapl 424 815 0 759 8 0 8 8 0 8 1 knotepl 120 33107 0 33060 39 30 9 20 0 8 7 kqueuepl 184 115 0 105 1 0 1 1 0 8 0 pipepl 304 180 0 153 3 0 3 3 0 8 0 fdescpl 448 782 0 759 5 1 4 5 0 8 1 filepl 120 4160 0 3973 15 3 12 12 0 8 5 lockfpl 104 159 0 156 1 0 1 1 0 8 0 lockfspl 48 67 0 64 1 0 1 1 0 8 0 sessionpl 144 49 0 41 1 0 1 1 0 8 0 pgrppl 48 73 0 58 1 0 1 1 0 8 0 ucredpl 104 681 0 670 1 0 1 1 0 8 0 zombiepl 144 763 0 762 1 0 1 1 0 8 0 processpl 1152 815 0 759 5 0 5 5 0 8 0 procpl 664 1339 0 1281 7 0 7 7 0 8 1 sockpl 552 831 0 805 18 8 10 14 0 8 8 mcl64k 65536 99 0 99 2 1 1 1 0 8 1 mcl16k 16384 2 0 2 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl9k128 9344 1 0 1 1 1 0 1 0 8 0 mcl8k 8192 14 0 14 2 1 1 1 0 8 1 mcl4k 4096 2966 0 2909 14 5 9 13 0 8 1 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 503 0 503 2 1 1 2 0 8 1 mtagpl 96 41 0 4 1 0 1 1 0 8 0 mbufpl 256 7940 0 7746 14 0 14 14 0 8 1 bufpl 280 6239 0 105 439 0 439 439 0 8 0 anonpl 24 134298 0 131581 65 3 62 65 0 186 26 amapchunkpl 152 19089 0 18792 30 6 24 28 0 158 10 amappl16 200 2678 0 2654 27 13 14 25 0 8 8 amappl15 192 3 0 2 1 0 1 1 0 8 0 amappl14 184 413 0 412 1 0 1 1 0 8 0 amappl13 176 119 0 109 1 0 1 1 0 8 0 amappl12 168 1038 0 1016 2 0 2 2 0 8 0 amappl11 160 12 0 12 1 1 0 1 0 8 0 amappl10 152 71 0 61 1 0 1 1 0 8 0 amappl9 144 270 0 270 1 1 0 1 0 8 0 amappl8 136 99 0 97 1 0 1 1 0 8 0 amappl7 128 143 0 132 1 0 1 1 0 8 0 amappl6 120 148 0 147 1 0 1 1 0 8 0 amappl5 112 103 0 96 1 0 1 1 0 8 0 amappl4 104 263 0 246 1 0 1 1 0 8 0 amappl3 96 3796 0 3726 4 1 3 4 0 8 0 amappl2 88 529 0 475 2 0 2 2 0 8 0 amappl1 80 11764 0 11249 13 1 12 13 0 8 0 amappl 88 5223 0 5119 4 0 4 4 0 92 0 uvmvnodes 80 111 0 0 3 0 3 3 0 8 0 dma8192 8192 2 0 2 2 1 1 1 0 8 1 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 0 1 1 0 8 1 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 26 0 3 1 0 1 1 0 8 0 uaddrrnd 24 782 0 759 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 782 0 759 1 0 1 1 0 8 0 vmmpekpl 168 8067 0 8031 2 0 2 2 0 8 0 vmmpepl 168 58086 0 56634 100 1 99 100 0 357 23 vmsppl 368 781 0 759 4 1 3 4 0 8 0 rwobjpl 40 18742 0 17852 15 0 15 15 0 8 0 pdppl 4096 1570 0 1518 96 34 62 78 0 8 10 pvpl 32 358245 0 350882 141 10 131 141 0 265 39 pmappl 216 781 0 759 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 373 0 52 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83421a3f) at panic+0x1cf sys/kern/subr_prf.c:198 rw_do_enter_read(ffffffff83accd38,0) at rw_do_enter_read+0x435 sys/kern/kern_rwlock.c:379 uvmfault_lookup(ffff80002a80e4f0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 uvm_fault_check(ffff80002a80e4f0,ffff80002a80e528,ffff80002a80e560,0) at uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 uvm_fault(ffffffff83accc50,ffff800029ee6000,0,2) at uvm_fault+0xe6 sys/uvm/uvm_fault.c:627 kpageflttrap(ffff80002a80e690,ffff800029ee6000) at kpageflttrap+0x2d1 sys/arch/amd64/amd64/trap.c:-1 kerntrap(ffff80002a80e690) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b kcov_remote_enter(0,ffff80002a79c910) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838c7f80,ffff80002a779800) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a779800,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 pmap_tlb_shootrange(0,ffff8000304b2000,ffff8000308b2000,1) at pmap_tlb_shootrange+0xe9 sys/arch/amd64/amd64/pmap.c:3361 pmap_do_remove(ffffffff83a82080,ffff8000304b2000,ffff8000308b2000,0) at pmap_do_remove+0x6d2 sys/arch/amd64/amd64/pmap.c:1931 uvm_unmap_kill_entry_withlock(ffffffff83accc50,fffffd806cca39e0,1) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_unmap_remove(ffffffff83accc50,ffff8000304b2000,ffff8000308b2000,ffff80002a80ebf8,0,1,14afca8d57349474) at uvm_unmap_remove+0x6c2 sys/uvm/uvm_map.c:2008 uvm_unmap(ffffffff83accc50,ffff8000304b2000,ffff8000308b2000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline] uvm_unmap(ffffffff83accc50,ffff8000304b2000,ffff8000308b2000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1799 km_free(ffff8000304b2000,400000,ffffffff837861a8,ffffffff83786290) at km_free+0x87 sys/uvm/uvm_km.c:714 kd_free(ffff8000015e04c0) at kd_free+0x84 sys/dev/kcov.c:564 kcovclose(181300,3,2000,ffff80002a779c98) at kcovclose+0xe4 sys/dev/kcov.c:-1 spec_close(ffff80002a80edd0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806cace1f8,3,fffffd8007ffd750,ffff80002a779c98) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806cad0000,ffff80002a779c98) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806cad0000,ffff80002a779c98) at vn_closefile+0x11d sys/kern/vfs_vnops.c:621 fdrop(fffffd806cad0000,ffff80002a779c98) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806cad0000,ffff80002a779c98) at closef+0x190 sys/kern/kern_descrip.c:1265 fdfree(ffff80002a779c98) at fdfree+0x115 sys/kern/kern_descrip.c:1196 exit1(ffff80002a779c98,43,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a779c98,ffff80002a80f130,ffff80002a80f080) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a80f130) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a80f130) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x714431a6e510, count: -34 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:438 panic(ffffffff83421a3f) at panic+0x1cf sys/kern/subr_prf.c:198 rw_do_enter_read(ffffffff83accd38,0) at rw_do_enter_read+0x435 sys/kern/kern_rwlock.c:379 uvmfault_lookup(ffff80002a80e4f0,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 uvm_fault_check(ffff80002a80e4f0,ffff80002a80e528,ffff80002a80e560,0) at uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 uvm_fault(ffffffff83accc50,ffff800029ee6000,0,2) at uvm_fault+0xe6 sys/uvm/uvm_fault.c:627 kpageflttrap(ffff80002a80e690,ffff800029ee6000) at kpageflttrap+0x2d1 sys/arch/amd64/amd64/trap.c:-1 kerntrap(ffff80002a80e690) at kerntrap+0x18a sys/arch/amd64/amd64/trap.c:528 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b kcov_remote_enter(0,ffff80002a79c910) at kcov_remote_enter+0x122 sys/dev/kcov.c:670 timeout_run(ffffffff838c7f80,ffff80002a779800) at timeout_run+0xdf sys/kern/kern_timeout.c:696 softclock_process_tick_timeout(ffff80002a779800,0) at softclock_process_tick_timeout+0x230 sys/kern/kern_timeout.c:756 softclock(0) at softclock+0x152 sys/kern/kern_timeout.c:788 softintr_dispatch(0) at softintr_dispatch+0xf9 sys/kern/kern_softintr.c:87 dosoftint(0) at dosoftint+0x48 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 pmap_tlb_shootrange(0,ffff8000304b2000,ffff8000308b2000,1) at pmap_tlb_shootrange+0xe9 sys/arch/amd64/amd64/pmap.c:3361 pmap_do_remove(ffffffff83a82080,ffff8000304b2000,ffff8000308b2000,0) at pmap_do_remove+0x6d2 sys/arch/amd64/amd64/pmap.c:1931 uvm_unmap_kill_entry_withlock(ffffffff83accc50,fffffd806cca39e0,1) at uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1869 uvm_unmap_remove(ffffffff83accc50,ffff8000304b2000,ffff8000308b2000,ffff80002a80ebf8,0,1,14afca8d57349474) at uvm_unmap_remove+0x6c2 sys/uvm/uvm_map.c:2008 uvm_unmap(ffffffff83accc50,ffff8000304b2000,ffff8000308b2000) at uvm_unmap+0xa7 vm_map_unlock_ln sys/uvm/uvm_map.c:-1 [inline] uvm_unmap(ffffffff83accc50,ffff8000304b2000,ffff8000308b2000) at uvm_unmap+0xa7 sys/uvm/uvm_map.c:1799 km_free(ffff8000304b2000,400000,ffffffff837861a8,ffffffff83786290) at km_free+0x87 sys/uvm/uvm_km.c:714 kd_free(ffff8000015e04c0) at kd_free+0x84 sys/dev/kcov.c:564 kcovclose(181300,3,2000,ffff80002a779c98) at kcovclose+0xe4 sys/dev/kcov.c:-1 spec_close(ffff80002a80edd0) at spec_close+0x466 sys/kern/spec_vnops.c:-1 VOP_CLOSE(fffffd806cace1f8,3,fffffd8007ffd750,ffff80002a779c98) at VOP_CLOSE+0x129 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806cad0000,ffff80002a779c98) at vn_closefile+0x11d vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806cad0000,ffff80002a779c98) at vn_closefile+0x11d sys/kern/vfs_vnops.c:621 fdrop(fffffd806cad0000,ffff80002a779c98) at fdrop+0x121 sys/kern/kern_descrip.c:1281 closef(fffffd806cad0000,ffff80002a779c98) at closef+0x190 sys/kern/kern_descrip.c:1265 fdfree(ffff80002a779c98) at fdfree+0x115 sys/kern/kern_descrip.c:1196 exit1(ffff80002a779c98,43,0,1) at exit1+0x576 sys/kern/kern_exit.c:215 sys_exit(ffff80002a779c98,ffff80002a80f130,ffff80002a80f080) at sys_exit+0x1a sys/kern/kern_exit.c:-1 syscall(ffff80002a80f130) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a80f130) at syscall+0x962 sys/arch/amd64/amd64/trap.c:783 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x714431a6e510, count: -34