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 *102315 13521 0 0 0x4000000 1 syz-executor 315429 13521 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8307290f) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806b204990,1,0) at witness_checkorder+0x1197 witness_debugger sys/kern/subr_witness.c:2518 [inline] witness_checkorder(fffffd806b204990,1,0) at witness_checkorder+0x1197 sys/kern/subr_witness.c:780 rw_enter(fffffd806b204980,2) at rw_enter+0x122 uvmfault_lookup(ffff800037276d40,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800037276d40,ffff800037276d78,ffff800037276da0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806b2048a0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800037276ee0,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800037276ee0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037277264,5,20000100,ffff800037277298,0,37,21043bb28ac0f1f0) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80002f57f978,ffff8000372773d0,ffff800037277320) at sys_sysctl+0x422 syscall(ffff8000372773d0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000372773d0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff800037277450, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic *cpu1: acquiring blockable sleep lock with spinlock or critical section held (rwlock) vmmaplk ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8307290f) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806b204990,1,0) at witness_checkorder+0x1197 witness_debugger sys/kern/subr_witness.c:2518 [inline] witness_checkorder(fffffd806b204990,1,0) at witness_checkorder+0x1197 sys/kern/subr_witness.c:780 rw_enter(fffffd806b204980,2) at rw_enter+0x122 uvmfault_lookup(ffff800037276d40,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800037276d40,ffff800037276d78,ffff800037276da0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806b2048a0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800037276ee0,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800037276ee0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037277264,5,20000100,ffff800037277298,0,37,21043bb28ac0f1f0) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80002f57f978,ffff8000372773d0,ffff800037277320) at sys_sysctl+0x422 syscall(ffff8000372773d0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000372773d0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8a571654740, count: -15 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800037276940 rbx 0xffff800029b7cd87 rdx 0 rcx 0xffff80002f57f978 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x374e2b4203df569e r11 0x30191a8bfa109d0c r12 0xffff800029b7cb88 r13 0 r14 0 r15 0x1 rip 0xffffffff81a93fa5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037276930 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=102315 pid=13521 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002f57e2b0,0xffff80002f57e548 process=0xffff800037268918 user=0xffff800037272000, vmspace=0xfffffd806b2048a0 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 23184 100953 89813 0 2 0 syz-executor 61139 445362 26274 0 2 0 syz-executor 61139 76274 26274 0 3 0x4000080 fsleep syz-executor 3550 65177 32898 0 2 0 syz-executor 13521 422294 78892 0 2 0 syz-executor *13521 102315 78892 0 7 0x4000000 syz-executor 13521 315429 78892 0 7 0x4000000 syz-executor 22734 105512 85838 0 2 0 syz-executor 22734 124743 85838 0 2 0x4000000 syz-executor 9388 431357 85519 0 2 0 syz-executor 9388 154166 85519 0 3 0x4000080 fsleep syz-executor 28972 407717 99794 0 2 0 syz-executor 28972 186055 99794 0 2 0x4000000 syz-executor 4031 123515 90812 0 2 0 syz-executor 4031 382937 90812 0 3 0x4000080 fsleep syz-executor 31608 367541 0 0 3 0x14200 acct acct 88868 112628 0 0 3 0x14280 nfsidl nfsio 14039 135602 0 0 3 0x14280 nfsidl nfsio 58090 222450 0 0 3 0x14280 nfsidl nfsio 88369 161866 0 0 3 0x14280 nfsidl nfsio 44524 1327 0 0 3 0x14280 nfsidl nfsio 70210 321113 0 0 3 0x14280 nfsidl nfsio 98748 467536 0 0 3 0x14280 nfsidl nfsio 38103 157221 0 0 3 0x14280 nfsidl nfsio 19939 479639 0 0 3 0x14280 nfsidl nfsio 35256 398401 0 0 3 0x14280 nfsidl nfsio 97704 180912 0 0 3 0x14280 nfsidl nfsio 80113 328642 0 0 3 0x14280 nfsidl nfsio 93457 334890 0 0 3 0x14280 nfsidl nfsio 49395 97980 0 0 3 0x14280 nfsidl nfsio 20819 97669 0 0 3 0x14280 nfsidl nfsio 3834 366253 0 0 3 0x14280 nfsidl nfsio 12226 197434 0 0 3 0x14280 nfsidl nfsio 45308 209733 0 0 3 0x14280 nfsidl nfsio 50776 83437 0 0 3 0x14280 nfsidl nfsio 81633 247849 0 0 3 0x14280 nfsidl nfsio 47004 67935 0 0 3 0x14200 bored sosplice 90812 44517 33966 0 3 0x82 nanoslp syz-executor 85838 231904 33966 0 2 0x2 syz-executor 99794 376617 33966 0 3 0x82 nanoslp syz-executor 26274 361920 33966 0 3 0x82 nanoslp syz-executor 85519 437158 33966 0 3 0x82 nanoslp syz-executor 89813 523417 33966 0 3 0x82 nanoslp syz-executor 78892 353994 33966 0 3 0x82 nanoslp syz-executor 32898 446651 33966 0 3 0x82 nanoslp syz-executor 33966 508821 39116 0 3 0x82 kqread syz-executor 39116 281752 69349 0 3 0x10008a sigsusp ksh 69349 519754 25259 0 3 0x98 kqread sshd-session 25259 520287 37493 0 3 0x92 kqread sshd-session 7328 149502 1 0 3 0x100083 ttyin getty 37493 342903 1 0 3 0x88 kqread sshd 91229 25494 42318 74 3 0x1100092 bpf pflogd 42318 316078 1 0 3 0x80 sbwait pflogd 16632 253688 28321 73 2 0x1100010 syslogd 28321 5791 1 0 3 0x100082 sbwait syslogd 7870 270932 1 0 3 0x100080 kqread resolvd 81952 177302 59414 77 3 0x100092 kqread dhcpleased 68280 494530 59414 77 3 0x100092 kqread dhcpleased 59414 427937 1 0 3 0x80 kqread dhcpleased 18189 455210 0 0 3 0x14200 bored smr 83074 74450 0 0 2 0x14200 zerothread 76788 226280 0 0 3 0x14200 aiodoned aiodoned 29653 414800 0 0 3 0x14200 syncer update 60121 327281 0 0 3 0x14200 cleaner cleaner 57428 264576 0 0 3 0x14200 reaper reaper 86742 7282 0 0 3 0x14200 pgdaemon pagedaemon 89086 156134 0 0 3 0x14200 bored viomb 1016 140315 0 0 3 0x40014200 acpi0 acpi0 85013 157913 0 0 3 0x40014200 idle1 93814 458330 0 0 3 0x14200 bored softnet3 60850 410337 0 0 3 0x14200 bored softnet2 3327 219010 0 0 3 0x14200 bored softnet1 43344 285923 0 0 3 0x14200 bored softnet0 34111 276942 0 0 3 0x14200 bored systqmp 90779 374476 0 0 3 0x14200 bored systq 98807 483084 0 0 3 0x14200 tmoslp softclockmp 13358 258098 0 0 3 0x40014200 tmoslp softclock 51507 67847 0 0 3 0x40014200 idle0 1 263591 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &table->inpt_mtx r = 0 (0xffffffff83518d10) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #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 13521 (syz-executor) thread 0xffff80002f57f978 (102315) exclusive rwlock netlock r = 0 (0xffffffff83424b40) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 sysctl_file+0xa18 sys/kern/kern_sysctl.c:1675 #2 kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 #3 sys_sysctl+0x422 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff834fce00) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 sysctl_vslock+0x80 sys/kern/kern_sysctl.c:181 #2 kern_sysctl+0x1b3 sys/kern/kern_sysctl.c:498 #3 sys_sysctl+0x422 #4 syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] #4 syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 #5 Xsyscall+0x128 exclusive rwlock sysctllk r = 0 (0xffffffff8348ed10) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #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 (0xffffffff83518d10) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #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 13521 (syz-executor) thread 0xffff80002f57f6f0 (315429) exclusive kernel: protection fault trap, code=0 Faulted in DDB; continuing... ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10201 10125K 10449K 166960K 12464 0 pcb 17 15K 16K 166960K 317 0 rtable 182 13K 14K 166960K 494 0 pf 34 17K 21K 166960K 160 0 ifaddr 36 6K 7K 166960K 68 0 ifgroup 51 2K 2K 166960K 107 0 sysctl 4 1K 1K 166960K 4 0 counters 62 36K 36K 166960K 94 0 ioctlops 0 0K 4K 166960K 1673 0 iov 0 0K 24K 166960K 83 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1446 91K 91K 166960K 2223 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 13 0 VM map 2 1K 1K 166960K 2 0 sem 22 5K 6K 166960K 25 0 dirhash 12 2K 2K 166960K 63 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 18 65K 89K 166960K 1156 0 sigio 0 0K 0K 166960K 37 0 proc 70 91K 140K 166960K 628 0 subproc 104 6K 6K 166960K 105 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 170 0 in_multi 70 5K 7K 166960K 137 0 ether_multi 1 0K 0K 166960K 14 0 mrt 1 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 97 440K 440K 166960K 97 0 exec 0 0K 1K 166960K 510 0 pfkey data 0 0K 0K 166960K 2 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 232 73K 95K 166960K 12667 0 UVM aobj 25 5K 5K 166960K 27 0 pinsyscall 43 86K 104K 166960K 2235 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 47 0 NDP 11 0K 2K 166960K 44 0 temp 71 6823K 6898K 166960K 51223 0 kqueue 13 20K 30K 166960K 189 0 SYN cache 2 16K 16K 166960K 2 0 ddb{1}> 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 120 176 0 173 3 2 1 3 0 8 0 rtentry 112 151 0 70 4 0 4 4 0 8 0 unpcb 144 1147 0 1130 6 3 3 4 0 8 2 syncache 336 4 0 4 2 2 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 808 362 0 357 5 1 4 4 0 8 2 arp 120 25 0 10 1 0 1 1 0 8 0 inpcb 336 1724 0 1715 10 3 7 7 0 8 5 nd6 136 32 0 11 1 0 1 1 0 8 0 pkpcb 40 7 0 7 3 2 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1168 7 0 7 2 2 0 1 0 8 0 pffrag 232 8 0 1 1 0 1 1 0 482 0 pffrnode 88 6 0 1 1 0 1 1 0 8 0 pffrent 40 11 0 4 1 0 1 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 79 0 29 1 0 1 1 0 8 0 pfstkey 128 79 0 29 2 0 2 2 0 8 0 pfstate 376 79 0 29 6 0 6 6 0 8 0 pfrule 1344 88 0 81 2 0 2 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 584 0 262 29 2 27 29 0 8 2 art_table 32 587 0 262 4 0 4 4 0 8 0 art_node 16 148 0 79 1 0 1 1 0 8 0 sysvmsgpl 40 15 0 8 1 0 1 1 0 8 0 semapl 112 20 0 0 1 0 1 1 0 8 0 shmpl 112 24 0 2 1 0 1 1 0 8 0 dirhash 1024 53 0 36 3 0 3 3 0 8 0 dino2pl 256 3480 0 1986 95 0 95 95 0 8 0 ffsino 272 3480 0 1986 102 0 102 102 0 8 0 nchpl 144 5210 0 3530 63 0 63 63 0 8 0 uvmvnodes 80 4119 0 0 85 0 85 85 0 8 0 vnodes 216 4119 0 0 229 0 229 229 0 8 0 namei 1024 17039 0 17039 2 1 1 2 0 8 1 percpumem 16 61 0 16 1 0 1 1 0 8 0 kstatmem 264 54 0 32 2 0 2 2 0 8 0 scsiplug 72 3 0 3 2 2 0 1 0 8 0 scxspl 216 27053 0 27053 10 9 1 8 1 8 1 plimitpl 152 279 0 262 1 0 1 1 0 8 0 sigapl 424 1480 0 1408 10 1 9 9 0 8 0 futexpl 64 16614 0 16611 1 0 1 1 0 8 0 knotepl 120 578 0 0 17 0 17 17 0 8 0 kqueuepl 216 445 0 436 8 7 1 5 0 8 0 pipepl 320 327 0 299 8 5 3 8 0 8 0 fdescpl 496 1439 0 1407 5 0 5 5 0 8 0 filepl 152 9781 0 9533 24 10 14 19 0 8 3 lockfpl 104 505 0 503 2 1 1 2 0 8 0 lockfspl 48 172 0 170 1 0 1 1 0 8 0 sessionpl 144 22 0 13 1 0 1 1 0 8 0 pgrppl 48 108 0 91 1 0 1 1 0 8 0 ucredpl 104 1325 0 1311 1 0 1 1 0 8 0 zombiepl 144 1408 0 1408 1 0 1 1 0 8 1 processpl 1160 1480 0 1408 7 1 6 6 0 8 0 procpl 648 3244 0 3165 9 1 8 8 0 8 0 srpgc 96 8 0 8 1 1 0 1 0 8 0 sosppl 168 4 0 4 2 2 0 1 0 8 0 sockpl 664 3066 0 3037 15 6 9 13 0 8 5 mcl64k 65536 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 260 0 0 33 0 33 33 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 5763 0 0 361 0 361 361 0 8 0 bufpl 280 9321 0 2164 512 0 512 512 0 8 0 anonpl 24 312789 0 309004 77 21 56 76 0 185 17 amapchunkpl 152 44509 0 44018 39 5 34 34 0 158 14 amappl16 200 7088 0 7055 43 29 14 15 0 8 8 amappl15 192 16 0 16 2 1 1 1 0 8 1 amappl14 184 120 0 108 1 0 1 1 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 2081 0 2050 3 1 2 2 0 8 0 amappl11 160 50 0 36 1 0 1 1 0 8 0 amappl10 152 7 0 7 1 1 0 1 0 8 0 amappl9 144 149 0 149 1 1 0 1 0 8 0 amappl8 136 27 0 24 1 0 1 1 0 8 0 amappl7 128 108 0 96 1 0 1 1 0 8 0 amappl6 120 164 0 162 1 0 1 1 0 8 0 amappl5 112 144 0 131 1 0 1 1 0 8 0 amappl4 104 318 0 299 1 0 1 1 0 8 0 amappl3 96 7822 0 7730 3 0 3 3 0 8 0 amappl2 88 1666 0 1586 2 0 2 2 0 8 0 amappl1 80 10740 0 10147 15 2 13 15 0 8 0 amappl 88 12222 0 12053 5 0 5 5 0 92 0 dma65536 65536 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 1 0 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 26 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1439 0 1407 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1439 0 1407 1 0 1 1 0 8 0 vmmpekpl 168 11548 0 11500 3 0 3 3 0 8 0 vmmpepl 168 94837 0 92897 100 4 96 97 0 357 8 vmsppl 440 1438 0 1407 6 2 4 5 0 8 0 rwobjpl 56 32694 0 27609 74 0 74 74 0 8 1 pdppl 4096 2885 0 2814 99 28 71 85 0 8 0 pvpl 32 31662 0 0 257 1 256 256 0 265 0 pmappl 248 1438 0 1407 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 755 0 44 21 0 21 21 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83436ff0) 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(ffffffff834fcbf8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834fcbf8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff834fcbf8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834fcbf8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003519b920) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003519b920) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8a4a0191340, count: 6 ddb{0}> trace x86_ipi_db(ffffffff83436ff0) 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(ffffffff834fcbf8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834fcbf8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 softintr_dispatch(0) at softintr_dispatch+0x5b sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 __mp_lock(ffffffff834fcbf8) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff834fcbf8) at __mp_lock+0x192 sys/kern/kern_lock.c:144 syscall(ffff80003519b920) at syscall+0xad6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff80003519b920) at syscall+0xad6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8a4a0191340, count: -9 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x25: addq $0x8,%rsp db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8307290f) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806b204990,1,0) at witness_checkorder+0x1197 witness_debugger sys/kern/subr_witness.c:2518 [inline] witness_checkorder(fffffd806b204990,1,0) at witness_checkorder+0x1197 sys/kern/subr_witness.c:780 rw_enter(fffffd806b204980,2) at rw_enter+0x122 uvmfault_lookup(ffff800037276d40,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800037276d40,ffff800037276d78,ffff800037276da0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806b2048a0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800037276ee0,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800037276ee0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037277264,5,20000100,ffff800037277298,0,37,21043bb28ac0f1f0) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80002f57f978,ffff8000372773d0,ffff800037277320) at sys_sysctl+0x422 syscall(ffff8000372773d0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000372773d0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 end trace frame: 0xffff800037277450, count: 0 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff8307290f) at panic+0x1e5 sys/kern/subr_prf.c:198 witness_checkorder(fffffd806b204990,1,0) at witness_checkorder+0x1197 witness_debugger sys/kern/subr_witness.c:2518 [inline] witness_checkorder(fffffd806b204990,1,0) at witness_checkorder+0x1197 sys/kern/subr_witness.c:780 rw_enter(fffffd806b204980,2) at rw_enter+0x122 uvmfault_lookup(ffff800037276d40,0) at uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 uvm_fault_check(ffff800037276d40,ffff800037276d78,ffff800037276da0) at uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 uvm_fault(fffffd806b2048a0,20000000,0,2) at uvm_fault+0x112 sys/uvm/uvm_fault.c:600 kpageflttrap(ffff800037276ee0,20000100) at kpageflttrap+0x2d0 sys/arch/amd64/amd64/trap.c:279 kerntrap(ffff800037276ee0) at kerntrap+0x14a sys/arch/amd64/amd64/trap.c:332 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyout() at copyout+0x62 kern_sysctl(ffff800037277264,5,20000100,ffff800037277298,0,37,21043bb28ac0f1f0) at kern_sysctl+0x320 sys/kern/kern_sysctl.c:500 sys_sysctl(ffff80002f57f978,ffff8000372773d0,ffff800037277320) at sys_sysctl+0x422 syscall(ffff8000372773d0) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:179 [inline] syscall(ffff8000372773d0) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8a571654740, count: -15