panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *124694 93226 0 0x2 0 0 syz-executor.3 35621 69616 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8259bed5) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff82613272,ffffffff8258d29d,90,ffffffff82575e68) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pagealloc_pg(fffffd8007b65120,fffffd8065b1a8e8,40a6ac000,0) at uvm_pagealloc_pg+0x427 uvm_pageinsert sys/uvm/uvm_page.c:138 [inline] uvm_pagealloc_pg(fffffd8007b65120,fffffd8065b1a8e8,40a6ac000,0) at uvm_pagealloc_pg+0x427 sys/uvm/uvm_page.c:709 uvm_pagealloc(fffffd8065b1a8e8,40a6ac000,0,3) at uvm_pagealloc+0x1e8 sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd8065b1a8b8,814d5946000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1183 pmap_enter(fffffd8065b1a8b8,814d5946000,75661000,3,21) at pmap_enter+0x2ac uvm_fault_upper(ffff80002dd4a2e0,ffff80002dd4a318,ffff80002dd4a1e0,0) at uvm_fault_upper+0x2b1 sys/uvm/uvm_fault.c:1047 uvm_fault(fffffd80615df478,814d5946000,0,1) at uvm_fault+0x164 sys/uvm/uvm_fault.c:610 upageflttrap(ffff80002dd4a450,814d5946008) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002dd4a450) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7fffffb230, count: 3 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: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8259bed5) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff82613272,ffffffff8258d29d,90,ffffffff82575e68) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pagealloc_pg(fffffd8007b65120,fffffd8065b1a8e8,40a6ac000,0) at uvm_pagealloc_pg+0x427 uvm_pageinsert sys/uvm/uvm_page.c:138 [inline] uvm_pagealloc_pg(fffffd8007b65120,fffffd8065b1a8e8,40a6ac000,0) at uvm_pagealloc_pg+0x427 sys/uvm/uvm_page.c:709 uvm_pagealloc(fffffd8065b1a8e8,40a6ac000,0,3) at uvm_pagealloc+0x1e8 sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd8065b1a8b8,814d5946000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1183 pmap_enter(fffffd8065b1a8b8,814d5946000,75661000,3,21) at pmap_enter+0x2ac uvm_fault_upper(ffff80002dd4a2e0,ffff80002dd4a318,ffff80002dd4a1e0,0) at uvm_fault_upper+0x2b1 sys/uvm/uvm_fault.c:1047 uvm_fault(fffffd80615df478,814d5946000,0,1) at uvm_fault+0x164 sys/uvm/uvm_fault.c:610 upageflttrap(ffff80002dd4a450,814d5946008) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002dd4a450) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7fffffb230, count: -12 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002dd49e10 rbx 0xffffffff8298ac5f cpu_info_full_primary+0x2c5f rdx 0 rcx 0 rax 0xffff800021202fc8 r8 0x101010101010101 r9 0x8080808080808080 r10 0x9bb36221fb4d6ef0 r11 0x5278b9fc23f5d3fe r12 0xffffffff8298aa60 cpu_info_full_primary+0x2a60 r13 0 r14 0 r15 0x1 rip 0xffffffff81ddc118 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002dd49e00 ss 0 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.3) pid=124694 stat=onproc flags process=2 proc=0 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800022c60000,0xffff800021158fe0 process=0xffff800022c5fa48 user=0xffff80002dd45000, vmspace=0xfffffd80615df478 estcpu=36, cpticks=3, pctcpu=0.26 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 52351 522910 99441 0 2 0 syz-executor.6 8179 496350 41143 0 2 0 syz-executor.0 8179 303753 41143 0 2 0x4000000 syz-executor.0 299 150894 77452 0 2 0 syz-executor.1 299 268752 77452 0 3 0x4000080 fsleep syz-executor.1 48081 235737 6566 0 2 0 syz-executor.4 48081 507218 6566 0 3 0x4000080 fsleep syz-executor.4 *93226 124694 80067 0 7 0x2 syz-executor.3 77452 2823 80067 0 2 0x482 syz-executor.1 99441 226700 80067 0 3 0x82 nanoslp syz-executor.6 6566 369818 80067 0 2 0x482 syz-executor.4 43884 167540 80067 0 3 0x82 nanoslp syz-executor.2 48536 248349 80067 0 2 0x482 syz-executor.5 93262 164918 0 0 3 0x14200 acct acct 41143 25538 80067 0 3 0x82 nanoslp syz-executor.0 74180 59528 0 0 3 0x14280 nfsidl nfsio 47570 432672 0 0 3 0x14280 nfsidl nfsio 35016 115170 0 0 3 0x14280 nfsidl nfsio 88487 97287 0 0 3 0x14280 nfsidl nfsio 78595 371711 0 0 3 0x14280 nfsidl nfsio 70107 245965 0 0 3 0x14280 nfsidl nfsio 22941 430178 0 0 3 0x14280 nfsidl nfsio 72918 124914 0 0 3 0x14280 nfsidl nfsio 56198 213744 0 0 3 0x14280 nfsidl nfsio 45613 266587 0 0 3 0x14280 nfsidl nfsio 70061 156530 0 0 3 0x14280 nfsidl nfsio 31697 462488 0 0 3 0x14280 nfsidl nfsio 67314 465283 0 0 3 0x14280 nfsidl nfsio 8933 446306 0 0 3 0x14280 nfsidl nfsio 60506 43365 0 0 3 0x14280 nfsidl nfsio 37564 26951 0 0 3 0x14280 nfsidl nfsio 98136 95726 0 0 3 0x14280 nfsidl nfsio 53280 138059 0 0 3 0x14280 nfsidl nfsio 51477 298239 0 0 3 0x14280 nfsidl nfsio 83558 131624 0 0 3 0x14280 nfsidl nfsio 4567 296816 80067 0 2 0x2 syz-executor.7 75104 434337 0 0 3 0x14200 bored sosplice 80067 473784 81344 0 3 0x82 thrsleep syz-fuzzer 80067 92238 81344 0 3 0x4000082 nanoslp syz-fuzzer 80067 360072 81344 0 3 0x4000082 thrsleep syz-fuzzer 80067 24840 81344 0 3 0x4000082 thrsleep syz-fuzzer 80067 504053 81344 0 3 0x4000082 thrsleep syz-fuzzer 80067 345173 81344 0 3 0x4000082 thrsleep syz-fuzzer 80067 7452 81344 0 3 0x4000082 thrsleep syz-fuzzer 80067 372506 81344 0 3 0x4000082 thrsleep syz-fuzzer 80067 341435 81344 0 3 0x4000082 nanoslp syz-fuzzer 80067 421052 81344 0 2 0x4000082 syz-fuzzer 81344 69606 13758 0 3 0x10008a sigsusp ksh 13758 499553 15539 0 3 0x9a kqread sshd 83838 408610 1 0 3 0x100083 ttyopn getty 15539 211164 1 0 3 0x88 kqread sshd 46849 328546 43651 74 3 0x1100092 bpf pflogd 43651 420643 1 0 3 0x80 netio pflogd 81006 445494 12273 73 3 0x1100090 kqread syslogd 12273 497711 1 0 3 0x100082 netio syslogd 23429 206372 1 0 3 0x100080 kqread resolvd 83175 496702 35887 77 3 0x100092 kqread dhcpleased 17979 224337 35887 77 3 0x100092 kqread dhcpleased 35887 108584 1 0 3 0x80 kqread dhcpleased 29063 490925 0 0 3 0x14200 bored smr 85144 306511 0 0 2 0x14200 zerothread 45701 75533 0 0 3 0x14200 aiodoned aiodoned 94394 429022 0 0 3 0x14200 syncer update 47410 335338 0 0 3 0x14200 cleaner cleaner 69616 35621 0 0 7 0x14200 reaper 12024 225304 0 0 3 0x14200 pgdaemon pagedaemon 5668 13566 0 0 3 0x14200 bored viomb 90400 126265 0 0 3 0x40014200 acpi0 acpi0 44933 98227 0 0 3 0x40014200 idle1 79506 464972 0 0 3 0x14200 bored softnet 72581 168916 0 0 3 0x14200 bored softnet 1605 134548 0 0 3 0x14200 bored softnet 51955 447334 0 0 3 0x14200 bored softnet 87764 481683 0 0 3 0x14200 bored systqmp 92721 64093 0 0 3 0x14200 bored systq 7182 289742 0 0 3 0x40014200 bored softclock 69281 46768 0 0 3 0x40014200 idle0 1 184052 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10250 6601K 7354K 78643K 36759 0 pcb 13 15K 17K 78643K 7979 0 rtable 153 8K 12K 78643K 1448 0 ifaddr 102 20K 22K 78643K 1335 0 sysctl 3 1K 1K 78643K 3 0 counters 58 35K 36K 78643K 208 0 ioctlops 0 0K 8K 78643K 13702 0 iov 0 0K 48K 78643K 859 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1363 85K 85K 78643K 9992 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 493 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 1014 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 14 49K 89K 78643K 39481 0 sigio 0 0K 0K 78643K 846 0 proc 78 92K 128K 78643K 1625 0 subproc 104 6K 6K 78643K 407 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 600 0 in_multi 56 3K 7K 78643K 663 0 ether_multi 1 0K 0K 78643K 116 0 mrt 1 0K 0K 78643K 68 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 253 1129K 1129K 78643K 253 0 exec 0 0K 2K 78643K 1778 0 pfkey data 0 0K 0K 78643K 711 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 351 181K 346K 78643K 209548 0 UVM aobj 56 2K 2K 78643K 57 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 393 0 NDP 17 0K 2K 78643K 154 0 temp 198 4825K 5849K 78643K 188449 0 kqueue 13 20K 28K 78643K 2660 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 1353 0 1350 9 8 1 3 0 8 0 rtentry 112 411 0 353 4 1 3 4 0 8 0 unpcb 136 8108 0 8092 61 56 5 6 0 8 4 syncache 296 94 0 94 12 12 0 1 0 8 0 tcpqe 32 6 57 6 1 1 0 1 0 8 0 tcpcb 736 6274 0 6270 118 117 1 30 0 8 0 arp 120 69 0 59 1 0 1 1 0 8 0 inpcb 312 26163 0 26155 155 149 6 12 0 8 5 nd6 48 94 0 82 1 0 1 1 0 8 0 pkpcb 40 1846 0 1846 7 7 0 1 0 8 0 kcovpl 48 31 0 23 1 0 1 1 0 8 0 ppxss 1248 25 0 25 7 7 0 1 0 8 0 pfstscr 40 24 0 24 5 5 0 1 0 8 0 pffrag 232 13 0 13 3 3 0 1 0 482 0 pffrnode 88 13 0 13 3 3 0 1 0 8 0 pffrent 40 29 0 29 3 3 0 1 0 8 0 pfosfp 40 1445 0 1444 6 5 1 5 0 8 0 pfosfpen 112 1445 0 1444 22 21 1 21 0 8 0 pfrktable 1344 86 0 82 5 4 1 1 0 8 0 pftag 88 29 0 17 3 2 1 1 0 8 0 pfqueue 264 23 0 23 2 2 0 1 0 8 0 pfstitem 24 66 0 64 1 0 1 1 0 8 0 pfstkey 112 116 0 114 2 1 1 2 0 8 0 pfstate 336 92 0 90 5 4 1 5 0 8 0 pfrule 1360 912 0 485 40 4 36 36 0 8 0 rttmr 64 12 0 12 3 3 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2024 0 1785 35 15 20 30 0 8 0 art_table 32 2025 0 1785 4 0 4 4 0 8 0 art_node 16 410 0 361 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 12 1 1 0 1 0 8 0 semupl 112 10 0 10 1 1 0 1 0 8 0 semapl 112 1002 0 992 1 0 1 1 0 8 0 shmpl 112 54 0 1 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 45468 0 43969 94 0 94 94 0 8 0 ffsino 272 45468 0 43969 101 0 101 101 0 8 0 nchpl 144 90252 0 88612 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 273724 0 273724 4 3 1 2 0 8 1 percpumem 16 116 0 75 1 0 1 1 0 8 0 vcpupl 2048 19 0 13 2 1 1 2 0 8 0 vmpool 560 27 0 21 4 3 1 2 0 8 0 pfiaddrpl 120 38 0 34 5 4 1 1 0 8 0 kstatmem 264 184 0 150 3 0 3 3 0 8 0 scsiplug 72 3 0 3 1 1 0 1 0 8 0 scxspl 216 259769 0 259769 16 15 1 8 0 8 1 plimitpl 152 2745 0 2730 1 0 1 1 0 8 0 sigapl 424 39761 0 39693 9 1 8 8 0 8 0 futexpl 64 251714 0 251712 4 3 1 1 0 8 0 knotepl 120 1602 0 0 18 5 13 17 0 8 0 kqueuepl 216 4044 0 4035 36 35 1 5 0 8 0 pipepl 336 4789 0 4761 104 98 6 8 0 8 3 fdescpl 496 39722 0 39695 5 0 5 5 0 8 0 filepl 152 181408 0 181166 220 205 15 20 0 8 5 lockfpl 104 4105 0 4102 6 5 1 2 0 8 0 lockfspl 48 1242 0 1239 1 0 1 1 0 8 0 sessionpl 144 47 0 30 1 0 1 1 0 8 0 pgrppl 48 101 0 84 1 0 1 1 0 8 0 ucredpl 96 15931 0 15915 1 0 1 1 0 8 0 zombiepl 144 39695 0 39693 2 1 1 1 0 8 0 processpl 1064 39761 0 39693 5 0 5 5 0 8 0 procpl 672 97051 0 96971 37 29 8 9 0 8 0 srpgc 96 36 0 36 9 9 0 1 0 8 0 sosppl 168 179 0 179 19 19 0 1 0 8 0 sockpl 480 37487 0 37460 354 334 20 29 0 8 16 mcl64k 65536 24 0 0 3 0 3 3 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 25 0 0 3 1 2 2 0 8 0 mcl9k 9216 25 0 0 3 1 2 2 0 8 0 mcl8k 8192 41 0 0 4 1 3 3 0 8 0 mcl4k 4096 49 0 0 4 1 3 3 0 8 0 mcl2k2 2112 12 0 0 1 0 1 1 0 8 0 mcl2k 2048 979 0 0 19 3 16 17 0 8 0 mtagpl 96 686 0 0 14 0 14 14 0 8 0 mbufpl 256 1460 0 0 60 1 59 60 0 8 0 bufpl 288 46639 0 40310 453 0 453 453 0 8 0 anonpl 24 6888113 0 6875187 267 183 84 190 0 186 2 amapchunkpl 152 606073 0 605562 76 52 24 31 0 158 1 amappl16 200 92836 0 92435 205 183 22 83 0 8 0 amappl15 192 12707 0 12702 1 0 1 1 0 8 0 amappl14 184 6014 0 6008 1 0 1 1 0 8 0 amappl13 176 2322 0 2320 1 0 1 1 0 8 0 amappl12 168 8809 0 8803 1 0 1 1 0 8 0 amappl11 160 5282 0 5261 3 2 1 2 0 8 0 amappl10 152 4840 0 4826 1 0 1 1 0 8 0 amappl9 144 2623 0 2620 1 0 1 1 0 8 0 amappl8 136 2385 0 2210 7 0 7 7 0 8 0 amappl7 128 1221 0 1208 1 0 1 1 0 8 0 amappl6 120 2544 0 2518 2 1 1 2 0 8 0 amappl5 112 32763 0 32745 1 0 1 1 0 8 0 amappl4 104 10276 0 10236 4 2 2 2 0 8 0 amappl3 96 121921 0 121879 2 0 2 2 0 8 0 amappl2 88 49139 0 49071 4 2 2 3 0 8 0 amappl1 80 908758 0 908155 23 8 15 20 0 8 0 amappl 88 208111 0 207953 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 56 0 1 2 1 1 2 0 8 0 uaddrrnd 24 39749 0 39716 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 39749 0 39716 1 0 1 1 0 8 0 vmmpekpl 168 250387 0 250320 5 1 4 4 0 8 0 vmmpepl 168 3698861 0 3696489 350 232 118 164 0 357 2 vmsppl 368 39748 0 39716 6 1 5 5 0 8 0 rwobjpl 56 855352 0 847890 117 10 107 109 0 8 0 pdppl 4096 79505 0 79438 1400 1329 71 84 0 8 4 pvpl 32 14426013 0 14408477 557 405 152 331 0 265 2 pmappl 248 39748 0 39716 4 1 3 3 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 2617 0 1729 27 0 27 27 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(ffffffff8259bed5) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff82613272,ffffffff8258d29d,90,ffffffff82575e68) at __assert+0x25 sys/kern/subr_prf.c:161 uvm_pagealloc_pg(fffffd8007b65120,fffffd8065b1a8e8,40a6ac000,0) at uvm_pagealloc_pg+0x427 uvm_pageinsert sys/uvm/uvm_page.c:138 [inline] uvm_pagealloc_pg(fffffd8007b65120,fffffd8065b1a8e8,40a6ac000,0) at uvm_pagealloc_pg+0x427 sys/uvm/uvm_page.c:709 uvm_pagealloc(fffffd8065b1a8e8,40a6ac000,0,3) at uvm_pagealloc+0x1e8 sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd8065b1a8b8,814d5946000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1183 pmap_enter(fffffd8065b1a8b8,814d5946000,75661000,3,21) at pmap_enter+0x2ac uvm_fault_upper(ffff80002dd4a2e0,ffff80002dd4a318,ffff80002dd4a1e0,0) at uvm_fault_upper+0x2b1 sys/uvm/uvm_fault.c:1047 uvm_fault(fffffd80615df478,814d5946000,0,1) at uvm_fault+0x164 sys/uvm/uvm_fault.c:610 upageflttrap(ffff80002dd4a450,814d5946008) at upageflttrap+0x82 sys/arch/amd64/amd64/trap.c:181 usertrap(ffff80002dd4a450) at usertrap+0x1aa sys/arch/amd64/amd64/trap.c:403 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7f7fffffb230, count: -12 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 msleep(ffffffff82b8a2c8,ffffffff829b21a0,4,ffffffff8264e8aa,0) at msleep+0x39 sys/kern/kern_synch.c:218 reaper(ffff800021132fc8) at reaper+0xdb sys/kern/kern_exit.c:425 end trace frame: 0x0, count: 9 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 kd_curproc sys/dev/kcov.c:577 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x28 sys/dev/kcov.c:148 msleep(ffffffff82b8a2c8,ffffffff829b21a0,4,ffffffff8264e8aa,0) at msleep+0x39 sys/kern/kern_synch.c:218 reaper(ffff800021132fc8) at reaper+0xdb sys/kern/kern_exit.c:425 end trace frame: 0x0, count: -6