panic: kernel diagnostic assertion "suser(curproc) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/dev/dt/dt_dev.c", line 431 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 489620 10919 0 0x14000 0x200 1 reaper db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82457a9f) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff824c5cc1,ffffffff824f1f1b,1af,ffffffff82493db5) at __assert+0x25 sys/kern/subr_prf.c:161 dt_ioctl_record_stop(ffff800000b8d780) at dt_ioctl_record_stop+0x165 sys/dev/dt/dt_dev.c:431 dtclose(11e6e,1,2000,ffff8000ffff42a0) at dtclose+0xe2 dt_pcb_purge sys/dev/dt/dt_dev.c:582 [inline] dtclose(11e6e,1,2000,ffff8000ffff42a0) at dtclose+0xe2 sys/dev/dt/dt_dev.c:204 spec_close(ffff80002128eb50) at spec_close+0x363 sys/kern/spec_vnops.c:572 VOP_CLOSE(fffffd8064eff2b0,1,fffffd807f7d86c0,ffff8000ffff42a0) at VOP_CLOSE+0xe3 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806811a1e8,ffff8000ffff42a0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806811a1e8,ffff8000ffff42a0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:624 fdrop(fffffd806811a1e8,ffff8000ffff42a0) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd806811a1e8,ffff8000ffff42a0) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff8000ffff42a0) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff8000ffff42a0,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:202 sys_exit(ffff8000ffff42a0,ffff80002128ede0,ffff80002128ee40) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002128eeb0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002128eeb0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 end trace frame: 0xffff80002128ef30, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "suser(curproc) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/dev/dt/dt_dev.c", line 431 ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:440 panic(ffffffff82457a9f) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff824c5cc1,ffffffff824f1f1b,1af,ffffffff82493db5) at __assert+0x25 sys/kern/subr_prf.c:161 dt_ioctl_record_stop(ffff800000b8d780) at dt_ioctl_record_stop+0x165 sys/dev/dt/dt_dev.c:431 dtclose(11e6e,1,2000,ffff8000ffff42a0) at dtclose+0xe2 dt_pcb_purge sys/dev/dt/dt_dev.c:582 [inline] dtclose(11e6e,1,2000,ffff8000ffff42a0) at dtclose+0xe2 sys/dev/dt/dt_dev.c:204 spec_close(ffff80002128eb50) at spec_close+0x363 sys/kern/spec_vnops.c:572 VOP_CLOSE(fffffd8064eff2b0,1,fffffd807f7d86c0,ffff8000ffff42a0) at VOP_CLOSE+0xe3 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806811a1e8,ffff8000ffff42a0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806811a1e8,ffff8000ffff42a0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:624 fdrop(fffffd806811a1e8,ffff8000ffff42a0) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd806811a1e8,ffff8000ffff42a0) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff8000ffff42a0) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff8000ffff42a0,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:202 sys_exit(ffff8000ffff42a0,ffff80002128ede0,ffff80002128ee40) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002128eeb0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002128eeb0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbbc40, count: -15 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80002128e960 rbx 0xffffffff82830bff cpu_info_full_primary+0x2bff rdx 0 rcx 0 rax 0xffff8000ffff42a0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xdd56f9c81fcfe8cd r11 0x372967a4171c8e9b r12 0xffffffff82830a00 cpu_info_full_primary+0x2a00 r13 0 r14 0 r15 0x1 rip 0xffffffff8146ad58 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002128e950 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=99961 stat=onproc flags process=1018 proc=2000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff47e0,0xffffffff829f1908 process=0xffff8000ffff0c90 user=0xffff800021289000, vmspace=0xfffffd806ee6d008 estcpu=36, cpticks=3, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 29959 124696 0 0 3 0x14200 bored sosplice 37600 220387 0 0 3 0x14280 nfsidl nfsio 75822 37910 0 0 3 0x14280 nfsidl nfsio 86931 110941 0 0 3 0x14280 nfsidl nfsio 19053 177336 0 0 3 0x14280 nfsidl nfsio 95901 172434 0 0 3 0x14280 nfsidl nfsio 53130 163615 0 0 3 0x14280 nfsidl nfsio 24979 324012 0 0 3 0x14280 nfsidl nfsio 54246 444292 0 0 3 0x14280 nfsidl nfsio 9517 28783 0 0 3 0x14280 nfsidl nfsio 95944 520501 0 0 3 0x14280 nfsidl nfsio 80842 27813 0 0 3 0x14280 nfsidl nfsio 28109 180838 0 0 3 0x14280 nfsidl nfsio 5034 48858 0 0 3 0x14280 nfsidl nfsio 32043 233129 0 0 3 0x14280 nfsidl nfsio 24696 133781 0 0 3 0x14280 nfsidl nfsio 68223 318236 0 0 3 0x14280 nfsidl nfsio 93641 32004 0 0 3 0x14280 nfsidl nfsio 50891 181806 0 0 3 0x14280 nfsidl nfsio 42543 364904 0 0 3 0x14280 nfsidl nfsio 21269 324102 0 0 3 0x14280 nfsidl nfsio 73830 340486 24620 0 3 0x82 nanoslp syz-executor.1 75652 54564 24620 0 3 0x82 nanoslp syz-executor.0 24620 279049 5575 0 3 0x82 thrsleep syz-fuzzer 24620 457231 5575 0 3 0x4000082 thrsleep syz-fuzzer 24620 252210 5575 0 3 0x4000082 thrsleep syz-fuzzer 24620 319280 5575 0 3 0x4000082 thrsleep syz-fuzzer 24620 388203 5575 0 3 0x4000082 kqread syz-fuzzer 24620 440345 5575 0 3 0x4000082 thrsleep syz-fuzzer 24620 55713 5575 0 3 0x4000082 thrsleep syz-fuzzer 24620 451603 5575 0 3 0x4000082 thrsleep syz-fuzzer 5575 76270 50252 0 3 0x10008a sigsusp ksh 50252 225872 77378 0 3 0x9a poll sshd 53741 389127 1 0 3 0x100083 ttyin getty 77378 12847 1 0 3 0x88 poll sshd 26023 368959 45608 74 3 0x100092 bpf pflogd 45608 136152 1 0 3 0x80 netio pflogd 13976 381432 74861 73 3 0x100090 kqread syslogd 74861 444577 1 0 3 0x100082 netio syslogd 71017 282653 1 0 3 0x100080 kqread resolvd 26098 189353 29742 77 3 0x100092 kqread dhcpleased 61140 468445 29742 77 3 0x100092 kqread dhcpleased 29742 265220 1 0 3 0x80 kqread dhcpleased 99818 136776 0 0 3 0x14200 bored smr 4995 270260 0 0 2 0x14200 zerothread 44388 171191 0 0 3 0x14200 aiodoned aiodoned 82870 517992 0 0 3 0x14200 syncer update 11656 226034 0 0 3 0x14200 cleaner cleaner 10919 489620 0 0 7 0x14200 reaper 43594 92564 0 0 3 0x14200 pgdaemon pagedaemon 36205 7434 0 0 3 0x14200 bored viomb 60578 218220 0 0 3 0x40014200 acpi0 acpi0 55780 184844 0 0 3 0x40014200 idle1 48197 462730 0 0 2 0x14200 softnet 99792 154364 0 0 3 0x14200 bored systqmp 38026 478408 0 0 3 0x14200 bored systq 33917 107234 0 0 3 0x40014200 bored softclock 64107 204710 0 0 3 0x40014200 idle0 1 2383 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 1: exclusive mutex &uvm.fpageqlock r = 0 (0xffffffff829e55a0) #0 witness_lock+0x44d #1 mtx_enter_try+0x100 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 uvm_pmr_freepageq+0xcc sys/uvm/uvm_pmemrange.c:1333 #4 amap_wipeout+0x1ff sys/uvm/uvm_amap.c:523 #5 uvm_unmap_detach+0x7d sys/uvm/uvm_map.c:1599 #6 uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 #7 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 #8 reaper+0x18b sys/kern/kern_exit.c:462 #9 proc_trampoline+0x1c Process 10919 (reaper) thread 0xffff800021149a40 (489620) exclusive kernel: protection fault trap, code=0 Faulted in DDB; continuing... ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10129 6471K 8047K 78643K 18410 0 pcb 13 11K 13K 78643K 137 0 rtable 87 3K 4K 78643K 216 0 ifaddr 44 10K 10K 78643K 49 0 counters 44 34K 34K 78643K 44 0 ioctlops 0 0K 4K 78643K 1588 0 iov 0 0K 12K 78643K 32 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1436 90K 90K 78643K 6429 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 8 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 46 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 25K 78643K 1624 0 proc 70 87K 111K 78643K 368 0 subproc 26 1K 1K 78643K 26 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 130 0 in_multi 29 1K 2K 78643K 59 0 ether_multi 1 0K 0K 78643K 7 0 mrt 1 0K 0K 78643K 7 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 2K 78643K 1581 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 222 31K 32K 78643K 23405 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 0K 78643K 30 0 NDP 6 0K 0K 78643K 11 0 temp 81 4193K 4257K 78643K 10107 0 kqueue 10 14K 18K 78643K 38 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 30 0 27 1 0 1 1 0 8 0 rtentry 112 55 0 22 2 0 2 2 0 8 0 unpcb 128 4431 0 4412 13 12 1 7 0 8 0 syncache 296 4 0 4 1 1 0 1 0 8 0 tcpcb 736 2200 0 2191 31 29 2 11 0 8 0 arp 120 6 0 0 1 0 1 1 0 8 0 inpcb 304 3288 0 3281 26 25 1 9 0 8 0 rttmr 72 3 0 3 1 1 0 1 0 8 0 nd6 48 9 0 5 1 0 1 1 0 8 0 kcovpl 48 2 0 0 1 0 1 1 0 8 0 pffrag 232 3 0 3 1 1 0 1 0 482 0 pffrnode 88 3 0 3 1 1 0 1 0 8 0 pffrent 40 136 0 136 1 1 0 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 pfstitem 24 21 0 16 1 0 1 1 0 8 0 pfstkey 112 21 0 16 1 0 1 1 0 8 0 pfstate 320 21 0 16 2 0 2 2 0 8 0 pfrule 1360 24 0 19 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 243 0 81 13 2 11 12 0 8 0 art_table 32 244 0 81 2 0 2 2 0 8 0 art_node 16 54 0 26 1 0 1 1 0 8 0 semapl 112 44 0 34 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4842 0 3435 89 0 89 89 0 8 0 ffsino 272 4842 0 3435 95 0 95 95 0 8 0 nchpl 144 7875 0 6253 61 0 61 61 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 24894 0 24894 1 0 1 1 0 8 1 percpumem 16 34 0 0 1 0 1 1 0 8 0 scxspl 216 18154 0 18154 10 9 1 8 0 8 1 plimitpl 152 99 0 90 1 0 1 1 0 8 0 sigapl 424 1895 0 1842 7 0 7 7 0 8 1 futexpl 64 13787 0 13787 1 0 1 1 0 8 1 knotepl 112 50 0 0 2 0 2 2 0 8 0 kqueuepl 216 223 0 217 4 3 1 4 0 8 0 pipepl 336 305 0 295 10 9 1 6 0 8 0 fdescpl 496 1860 0 1842 3 0 3 3 0 8 0 filepl 152 17795 0 17683 29 22 7 14 0 8 2 lockfpl 104 171 0 169 1 0 1 1 0 8 0 lockfspl 48 86 0 84 1 0 1 1 0 8 0 sessionpl 144 18 0 7 1 0 1 1 0 8 0 pgrppl 48 21 0 10 1 0 1 1 0 8 0 ucredpl 96 2463 0 2448 1 0 1 1 0 8 0 zombiepl 144 1843 0 1841 1 0 1 1 0 8 0 processpl 1064 1895 0 1841 4 0 4 4 0 8 0 procpl 672 5514 0 5452 11 5 6 7 0 8 0 sosppl 168 2 0 2 1 1 0 1 0 8 0 sockpl 480 7749 0 7720 140 136 4 29 0 8 0 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 10 0 0 1 0 1 1 0 8 0 mcl9k 9216 4 0 0 1 0 1 1 0 8 0 mcl8k 8192 8 0 0 1 0 1 1 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 151 0 0 17 0 17 17 0 8 0 mtagpl 96 56 0 0 2 0 2 2 0 8 0 mbufpl 256 473 0 0 29 0 29 29 0 8 0 bufpl 288 5879 0 140 410 0 410 410 0 8 0 anonpl 24 503788 0 487915 107 8 99 100 0 186 0 amapchunkpl 152 55457 0 54830 31 4 27 27 0 158 2 amappl16 200 3653 0 3163 30 4 26 27 0 8 0 amappl15 192 77 0 71 1 0 1 1 0 8 0 amappl14 184 1 0 1 1 1 0 1 0 8 0 amappl13 176 29 0 28 1 0 1 1 0 8 0 amappl12 168 807 0 799 1 0 1 1 0 8 0 amappl11 160 887 0 872 1 0 1 1 0 8 0 amappl10 152 23 0 19 1 0 1 1 0 8 0 amappl9 144 488 0 482 1 0 1 1 0 8 0 amappl8 136 370 0 328 2 0 2 2 0 8 0 amappl7 128 69 0 60 1 0 1 1 0 8 0 amappl6 120 147 0 129 1 0 1 1 0 8 0 amappl5 112 1268 0 1254 1 0 1 1 0 8 0 amappl4 104 2253 0 2226 1 0 1 1 0 8 0 amappl3 96 973 0 954 1 0 1 1 0 8 0 amappl2 88 372 0 334 2 1 1 2 0 8 0 amappl1 80 38247 0 37799 14 4 10 13 0 8 0 amappl 88 22985 0 22823 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 1860 0 1842 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1860 0 1842 1 0 1 1 0 8 0 vmmpekpl 168 19725 0 19701 2 0 2 2 0 8 0 vmmpepl 168 170963 0 169196 100 19 81 96 0 357 1 vmsppl 368 1859 0 1841 2 0 2 2 0 8 0 rwobjpl 56 49751 0 42553 103 1 102 103 0 8 0 pdppl 4096 3728 0 3682 62 16 46 50 0 8 0 pvpl 32 898351 0 879011 181 17 164 166 0 265 5 pmappl 248 1859 0 1841 2 0 2 2 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 774 0 59 21 0 21 21 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:440 panic(ffffffff82457a9f) at panic+0x177 sys/kern/subr_prf.c:202 __assert(ffffffff824c5cc1,ffffffff824f1f1b,1af,ffffffff82493db5) at __assert+0x25 sys/kern/subr_prf.c:161 dt_ioctl_record_stop(ffff800000b8d780) at dt_ioctl_record_stop+0x165 sys/dev/dt/dt_dev.c:431 dtclose(11e6e,1,2000,ffff8000ffff42a0) at dtclose+0xe2 dt_pcb_purge sys/dev/dt/dt_dev.c:582 [inline] dtclose(11e6e,1,2000,ffff8000ffff42a0) at dtclose+0xe2 sys/dev/dt/dt_dev.c:204 spec_close(ffff80002128eb50) at spec_close+0x363 sys/kern/spec_vnops.c:572 VOP_CLOSE(fffffd8064eff2b0,1,fffffd807f7d86c0,ffff8000ffff42a0) at VOP_CLOSE+0xe3 sys/kern/vfs_vops.c:156 vn_closefile(fffffd806811a1e8,ffff8000ffff42a0) at vn_closefile+0xd7 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806811a1e8,ffff8000ffff42a0) at vn_closefile+0xd7 sys/kern/vfs_vnops.c:624 fdrop(fffffd806811a1e8,ffff8000ffff42a0) at fdrop+0xc7 sys/kern/kern_descrip.c:1279 closef(fffffd806811a1e8,ffff8000ffff42a0) at closef+0x11c sys/kern/kern_descrip.c:1263 fdfree(ffff8000ffff42a0) at fdfree+0xf4 sys/kern/kern_descrip.c:1195 exit1(ffff8000ffff42a0,0,0,1) at exit1+0x37d sys/kern/kern_exit.c:202 sys_exit(ffff8000ffff42a0,ffff80002128ede0,ffff80002128ee40) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80002128eeb0) at syscall+0x489 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff80002128eeb0) at syscall+0x489 sys/arch/amd64/amd64/trap.c:585 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbbc40, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) 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(ffffffff8290f450) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8290f450) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800021185a20,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd806ee6dcf8) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd806ee6dcf8) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff800021149a40) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: 7 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) 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(ffffffff8290f450) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff8290f450) at __mp_lock+0x122 sys/kern/kern_lock.c:147 uvm_unmap_detach(ffff800021185a20,1) at uvm_unmap_detach+0x113 sys/uvm/uvm_map.c:1615 uvm_map_teardown(fffffd806ee6dcf8) at uvm_map_teardown+0x262 sys/uvm/uvm_map.c:2789 uvmspace_free(fffffd806ee6dcf8) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3685 reaper(ffff800021149a40) at reaper+0x18b sys/kern/kern_exit.c:462 end trace frame: 0x0, count: -8