panic: acquiring blockable sleep lock with spinlock or critical section held (rwlock) vmmaplk Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *432474 66693 32767 0x1010 0x4080000 0K syz-executor 264916 66693 32767 0x1010 0x4080000 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830781b8) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806b5d1460,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd806b5d1450) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80003f1eea30,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80003f1eea30,ffff80003f1eea68,ffff80003f1eea90) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806b5d1370,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80003f1eebd0,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80003f1eebd0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80003f1eef54,5,20000100,ffff80003f1eef88,0,37,c0c6a9957f070bc8) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80003dde9240,ffff80003f1ef0c0,ffff80003f1ef010) at sys_sysctl+0x422 syscall(ffff80003f1ef0c0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003f1ef0c0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff80003f1ef140, 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: acquiring blockable sleep lock with spinlock or critical section held (rwlock) vmmaplk ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830781b8) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806b5d1460,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd806b5d1450) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80003f1eea30,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80003f1eea30,ffff80003f1eea68,ffff80003f1eea90) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806b5d1370,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80003f1eebd0,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80003f1eebd0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80003f1eef54,5,20000100,ffff80003f1eef88,0,37,c0c6a9957f070bc8) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80003dde9240,ffff80003f1ef0c0,ffff80003f1ef010) at sys_sysctl+0x422 syscall(ffff80003f1ef0c0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003f1ef0c0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6f0900f9cd0, count: -15 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff80003f1ee690 rbx 0xffffffff8341bdcf cpu_info_full_primary+0x2dcf rdx 0 rcx 0xffff80003dde9240 rax 0xffffffff8341aff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xb5cf38c38ee385d1 r11 0x4edd7be7e267f14a r12 0xffffffff8341bbd0 cpu_info_full_primary+0x2bd0 r13 0 r14 0 r15 0x1 rip 0xffffffff816bc715 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff80003f1ee680 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=432474 pid=66693 tcnt=5 stat=onproc flags process=1010 proc=4080000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0xffff80003dde9c60 scnt=4 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003dde9c60,0xffff80003dde99e8 process=0xffff80003f249fd0 user=0xffff80003f1ea000, vmspace=0xfffffd806b5d1370 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 66693 187688 36601 32767 3 0x3010 suspend syz-executor *66693 432474 36601 32767 7 0x4081010 syz-executor 66693 264916 36601 32767 7 0x4081010 syz-executor 66693 443209 36601 32767 2 0x4081090 syz-executor 66693 509430 36601 32767 2 0x4081010 syz-executor 26682 131979 53624 32767 2 0x10 syz-executor 26682 318032 53624 32767 3 0x4000090 lockf syz-executor 27997 83437 63212 32767 3 0x90 nanoslp syz-executor 27997 417032 63212 32767 3 0x4000090 lockf syz-executor 27997 354643 63212 32767 3 0x4000090 lockf syz-executor 27997 380906 63212 32767 3 0x4000090 fsleep syz-executor 97173 473040 45079 32767 3 0x90 nanoslp syz-executor 97173 510462 45079 32767 3 0x4000090 ttyin syz-executor 97173 388422 45079 32767 3 0x4000090 fsleep syz-executor 72045 166541 5667 32767 2 0x10 syz-executor 72045 297000 5667 32767 3 0x4000090 fifow syz-executor 72045 399532 5667 32767 3 0x4000090 fsleep syz-executor 11378 2230 85335 32767 3 0x90 nanoslp syz-executor 11378 182333 85335 32767 3 0x4000090 kqread syz-executor 11378 452768 85335 32767 3 0x4000090 fsleep syz-executor 63741 523475 15420 32767 3 0x90 nanoslp syz-executor 63741 255055 15420 32767 3 0x4000090 kqread syz-executor 63741 441694 15420 32767 3 0x4000090 fsleep syz-executor 85335 399850 55211 32767 3 0x90 nanoslp syz-executor 55211 140625 50717 0 3 0x82 wait syz-executor 15420 425044 72643 32767 3 0x90 nanoslp syz-executor 72643 482524 50717 0 3 0x82 wait syz-executor 63212 52536 27418 32767 3 0x90 nanoslp syz-executor 27418 69851 50717 0 3 0x82 wait syz-executor 36601 272680 73728 32767 3 0x90 nanoslp syz-executor 73728 493097 50717 0 3 0x82 wait syz-executor 45079 234719 28207 32767 3 0x90 nanoslp syz-executor 28207 107054 50717 0 3 0x82 wait syz-executor 5667 311585 27622 32767 3 0x90 nanoslp syz-executor 27622 72006 50717 0 3 0x82 wait syz-executor 53624 500283 65317 32767 3 0x90 nanoslp syz-executor 65317 30717 50717 0 3 0x82 wait syz-executor 4178 160342 15266 32767 3 0x90 wait syz-executor 15266 211119 50717 0 3 0x82 wait syz-executor 10300 447066 0 0 3 0x14200 bored sosplice 50717 385241 84963 0 2 0x2 syz-executor 84963 434868 36307 0 3 0x10008a sigsusp ksh 36307 430811 11361 0 3 0x98 kqread sshd-session 11361 47176 64006 0 3 0x92 kqread sshd-session 36242 37072 1 0 3 0x100083 ttyin getty 64006 294440 1 0 3 0x88 kqread sshd 51929 222329 93177 73 3 0x1100090 kqread syslogd 93177 462769 1 0 3 0x100082 sbwait syslogd 14610 311583 1 0 3 0x100080 kqread resolvd 24297 261036 42216 77 3 0x100092 kqread dhcpleased 41420 455579 42216 77 3 0x100092 kqread dhcpleased 42216 213925 1 0 3 0x80 kqread dhcpleased 53963 432421 0 0 3 0x14200 bored smr 12050 381051 0 0 2 0x14200 zerothread 3202 137584 0 0 3 0x14200 aiodoned aiodoned 29148 417331 0 0 3 0x14200 syncer update 53141 160293 0 0 3 0x14200 cleaner cleaner 4031 7576 0 0 3 0x14200 reaper reaper 26603 464078 0 0 3 0x14200 pgdaemon pagedaemon 1170 429158 0 0 3 0x14200 bored viomb 41346 5595 0 0 3 0x40014200 acpi0 acpi0 65209 428598 0 0 3 0x40014200 idle1 27013 281854 0 0 3 0x14200 bored softnet3 25036 71580 0 0 3 0x14200 bored softnet2 67225 346782 0 0 3 0x14200 bored softnet1 51556 186741 0 0 3 0x14200 bored softnet0 29740 447143 0 0 3 0x14200 bored systqmp 75284 277862 0 0 3 0x14200 bored systq 33616 69320 0 0 3 0x14200 tmoslp softclockmp 66309 275624 0 0 3 0x40014200 tmoslp softclock 52378 10191 0 0 3 0x40014200 idle0 1 342138 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex &table->inpt_mtx r = 0 (0xffffffff83524d08) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 sysctl_file+0xa2d #4 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #5 sys_sysctl+0x422 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 Process 66693 (syz-executor) thread 0xffff80003dde9240 (432474) exclusive rwlock netlock r = 0 (0xffffffff8349cbb0) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 sysctl_file+0xa18 sys/kern/kern_sysctl.c:1675 #3 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #4 sys_sysctl+0x422 #5 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #5 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff83523de8) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 __mp_acquire_count+0x58 #2 mi_switch+0x658 sys/kern/sched_bsd.c:460 #3 sleep_finish+0x219 sys/kern/kern_synch.c:416 #4 rw_enter+0x348 sys/kern/kern_rwlock.c:285 #5 sysctl_file+0xa18 sys/kern/kern_sysctl.c:1675 #6 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #7 sys_sysctl+0x422 #8 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #8 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #9 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff8345ed50) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 rw_enter+0x41b sys/kern/kern_rwlock.c:309 #2 sysctl_vslock+0x45 sys/kern/kern_sysctl.c:176 #3 kern_sysctl+0x1b3 sys/kern/kern_sysctl.c:498 #4 sys_sysctl+0x422 #5 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #5 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #6 Xsyscall+0x128 exclusive mutex &table->inpt_mtx r = 0 (0xffffffff83524d08) #0 witness_lock+0x5bb stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5bb sys/kern/subr_witness.c:1155 #1 mtx_enter_try+0x178 #2 mtx_enter+0x60 sys/kern/kern_lock.c:239 #3 sysctl_file+0xa2d #4 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #5 sys_sysctl+0x422 #6 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #6 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #7 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10225 11053K 11059K 166960K 13177 0 pcb 17 28K 32K 166960K 29 0 rtable 240 6K 7K 166960K 22377 0 pf 31 16K 16K 166960K 1287 0 ifaddr 42 15K 19K 166960K 2543 0 ifgroup 50 2K 2K 166960K 2554 0 sysctl 4 1K 5K 166960K 105 0 counters 64 36K 36K 166960K 1312 0 ioctlops 0 0K 2K 166960K 1593 0 iov 0 0K 36K 166960K 3642 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1463 92K 92K 166960K 17481 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 3 5K 13K 166960K 726 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 2357 0 dirhash 24 4K 5K 166960K 1002 0 ACPI 1690 195K 286K 166960K 12418 0 file desc 26 97K 157K 166960K 43412 0 sigio 0 0K 0K 166960K 1271 0 proc 58 79K 176K 166960K 21744 0 subproc 104 6K 12K 166960K 9269 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 10345 0 in_multi 99 7K 7K 166960K 8779 0 ether_multi 1 0K 0K 166960K 312 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 289 1288K 1288K 166960K 289 0 exec 0 0K 1K 166960K 15568 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 292 76K 131K 166960K 376096 0 UVM aobj 131 5K 7K 166960K 144 0 pinsyscall 47 94K 130K 166960K 62005 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 3035 0 NDP 13 0K 2K 166960K 1891 0 temp 75 6825K 6952K 166960K 318620 0 kqueue 14 22K 37K 166960K 7380 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 6527 0 6524 49 46 3 3 0 8 2 rtentry 112 7424 0 7311 13 9 4 4 0 8 0 unpcb 144 43533 0 43512 188 182 6 10 0 8 5 syncache 336 925 0 925 33 32 1 1 0 8 1 tcpqe 32 414 0 414 33 32 1 1 0 8 1 tcpcb 808 29607 0 29480 266 246 20 27 0 8 0 arp 120 1289 0 1271 1 0 1 1 0 8 0 ipq 40 232 0 227 4 3 1 1 0 8 0 ipqe 40 3366 0 3360 4 3 1 1 0 8 0 inpcb 336 64263 0 64130 290 272 18 25 0 8 0 ip6q 72 9 0 9 8 8 0 1 0 8 0 ip6af 40 18 0 18 8 8 0 1 0 8 0 nd6 136 2340 0 2313 10 8 2 2 0 8 0 kcovpl 48 713 0 705 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 29930 0 29463 183 151 32 34 0 8 0 art_table 32 29931 0 29463 16 11 5 5 0 8 0 art_node 16 7423 0 7320 1 0 1 1 0 8 0 sysvmsgpl 40 46 0 7 1 0 1 1 0 8 0 semapl 112 2352 0 2342 1 0 1 1 0 8 0 shmpl 112 141 0 13 4 0 4 4 0 8 0 dirhash 1024 692 0 659 14 9 5 5 0 8 0 dino2pl 256 57086 0 53237 241 0 241 241 0 8 0 ffsino 272 57086 0 53237 257 0 257 257 0 8 0 nchpl 144 105296 0 102114 119 0 119 119 0 8 0 uvmvnodes 80 10413 0 0 213 0 213 213 0 8 0 vnodes 216 10413 0 0 579 0 579 579 0 8 0 namei 1024 449312 0 449312 33 32 1 3 0 8 1 percpumem 16 670 0 624 1 0 1 1 0 8 0 kstatmem 264 1270 0 1248 3 1 2 2 0 8 0 scxspl 216 434958 0 434958 91 89 2 8 1 8 2 plimitpl 152 14323 0 14295 2 0 2 2 0 8 0 sigapl 424 42567 0 42510 20 13 7 9 0 8 0 futexpl 64 520165 0 520159 23 22 1 1 0 8 0 knotepl 120 1964 0 0 25 0 25 25 0 8 0 kqueuepl 216 16719 0 16707 150 147 3 9 0 8 2 pipepl 320 9683 0 9655 126 118 8 13 0 8 4 fdescpl 496 42548 0 42510 20 14 6 7 0 8 0 filepl 152 316981 0 316710 205 183 22 24 0 8 8 lockfpl 104 11826 0 11818 7 6 1 2 0 8 0 lockfspl 48 3563 0 3559 1 0 1 1 0 8 0 sessionpl 144 934 0 918 1 0 1 1 0 8 0 pgrppl 48 2672 0 2648 1 0 1 1 0 8 0 ucredpl 104 61170 0 61151 1 0 1 1 0 8 0 zombiepl 144 42511 0 42510 1 0 1 1 0 8 0 processpl 1160 42567 0 42510 9 4 5 6 0 8 0 procpl 648 100955 0 100882 19 12 7 7 0 8 0 srpgc 96 31 0 31 13 13 0 1 0 8 0 sosppl 168 614 0 602 7 6 1 1 0 8 0 sockpl 664 115752 0 115593 418 390 28 32 0 8 8 mcl64k 65536 41 0 0 5 1 4 4 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 16 0 0 2 0 2 2 0 8 0 mcl4k 4096 243 0 0 18 1 17 18 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 558 0 0 19 12 7 12 0 8 0 mtagpl 96 13 0 0 1 0 1 1 0 8 0 mbufpl 256 6884 0 0 361 0 361 361 0 8 0 bufpl 280 77580 0 67165 745 0 745 745 0 8 0 anonpl 24 5232664 0 5219008 543 428 115 134 0 185 0 amapchunkpl 152 1239913 0 1239018 395 354 41 51 0 158 0 amappl16 200 122261 0 121846 422 387 35 48 0 8 0 amappl15 192 14 0 14 8 8 0 1 0 8 0 amappl14 184 1948 0 1938 1 0 1 1 0 8 0 amappl13 176 42 0 41 13 12 1 1 0 8 0 amappl12 168 53409 0 53371 7 4 3 3 0 8 0 amappl11 160 50 0 39 1 0 1 1 0 8 0 amappl10 152 10 0 9 2 1 1 1 0 8 0 amappl9 144 129 0 127 2 1 1 1 0 8 0 amappl8 136 25 0 23 1 0 1 1 0 8 0 amappl7 128 1733 0 1722 1 0 1 1 0 8 0 amappl6 120 6373 0 6370 1 0 1 1 0 8 0 amappl5 112 2908 0 2898 1 0 1 1 0 8 0 amappl4 104 3333 0 3315 1 0 1 1 0 8 0 amappl3 96 253591 0 253445 8 3 5 5 0 8 0 amappl2 88 12978 0 12914 7 4 3 3 0 8 0 amappl1 80 249011 0 248483 45 28 17 23 0 8 0 amappl 88 366741 0 366503 10 3 7 7 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 72 143 0 13 3 0 3 3 0 8 0 uaddrrnd 24 42548 0 42510 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 42548 0 42510 1 0 1 1 0 8 0 vmmpekpl 168 368959 0 368904 8 3 5 5 0 8 0 vmmpepl 168 2724451 0 2721966 454 330 124 157 0 357 3 vmsppl 440 42547 0 42510 9 4 5 6 0 8 0 rwobjpl 56 692188 0 680356 219 48 171 173 0 8 0 pdppl 4096 85103 0 85020 1388 1303 85 115 0 8 2 pvpl 32 49128 0 0 390 1 389 389 0 265 0 pmappl 248 42547 0 42510 13 10 3 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3115 0 2061 31 0 31 31 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830781b8) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806b5d1460,1,0) at witness_checkorder+0x1113 sys/kern/subr_witness.c:843 rw_enter_read(fffffd806b5d1450) at rw_enter_read+0xab sys/kern/kern_rwlock.c:112 uvmfault_lookup(ffff80003f1eea30,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff80003f1eea30,ffff80003f1eea68,ffff80003f1eea90) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806b5d1370,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff80003f1eebd0,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff80003f1eebd0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff80003f1eef54,5,20000100,ffff80003f1eef88,0,37,c0c6a9957f070bc8) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80003dde9240,ffff80003f1ef0c0,ffff80003f1ef010) at sys_sysctl+0x422 syscall(ffff80003f1ef0c0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003f1ef0c0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6f0900f9cd0, count: -15 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff83523be0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83523be0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 single_thread_check_locked(ffff80003dde99d8,0) at single_thread_check_locked+0x2b5 sys/kern/kern_sig.c:2038 userret(ffff80003dde99d8) at userret+0x9c sys/kern/kern_sig.c:1977 syscall(ffff80003f201580) at syscall+0x9a7 mi_syscall_return sys/sys/syscall_mi.h:206 [inline] syscall(ffff80003f201580) at syscall+0x9a7 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6f0fa280190, count: 7 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 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(ffffffff83523be0) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff83523be0) at __mp_lock+0x192 sys/kern/kern_lock.c:144 single_thread_check_locked(ffff80003dde99d8,0) at single_thread_check_locked+0x2b5 sys/kern/kern_sig.c:2038 userret(ffff80003dde99d8) at userret+0x9c sys/kern/kern_sig.c:1977 syscall(ffff80003f201580) at syscall+0x9a7 mi_syscall_return sys/sys/syscall_mi.h:206 [inline] syscall(ffff80003f201580) at syscall+0x9a7 sys/arch/amd64/amd64/trap.c:598 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x6f0fa280190, count: -8