panic: kerWnAeRlN ING:d iSaPgL nNOoTstic LaOsserWtEiRED ON TRAP EXIT a 0 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND *113674 27242 0 0 0 1 syz-executor 224422 9612 0 0 0x4000000 0 syz-executor proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77b188554a80, count: 14 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 *cpu0: kernel diagnostic assertion "(pg->pg_flags & (PQ_INACTIVE|PQ_ACTIVE)) == 0" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 1309 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77b188554a80, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800037fe1240 rbx 0 rdx 0 rcx 0xffff80003c40afc0 rax 0x2a r8 0xffff800037fe1170 r9 0x1 r10 0x7957a3701c0ee6e4 r11 0x181106c2d0dbcbd7 r12 0 r13 0xffffffff82e7bf98 Xdoreti+0x18 r14 0 r15 0 rip 0xffffffff831f04c7 proc_trampoline+0xc7 cs 0x8 rflags 0x246 rsp 0xffff800037fe11c0 ss 0 proc_trampoline+0xc7: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=113674 pid=27242 tcnt=2 stat=onproc flags process=0 proc=0 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003bbfda10,0xffff80003c40a040 process=0xffff80003c4c0028 user=0xffff800037fdc000, vmspace=0xfffffd806c817b90 estcpu=36, cpticks=0, pctcpu=0.0, user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 4441 192652 60508 0 2 0 syz-executor *27242 113674 19359 0 7 0 syz-executor 27242 208666 19359 0 3 0x4000080 fsleep syz-executor 9612 97405 95573 0 2 0 syz-executor 9612 224422 95573 0 7 0x4000000 syz-executor 99211 438969 0 0 3 0x14280 nfsidl nfsio 75528 367747 0 0 3 0x14280 nfsidl nfsio 92359 388652 0 0 3 0x14280 nfsidl nfsio 6356 274956 0 0 3 0x14280 nfsidl nfsio 10212 48905 0 0 3 0x14280 nfsidl nfsio 10205 187390 0 0 3 0x14280 nfsidl nfsio 49521 73667 0 0 3 0x14280 nfsidl nfsio 79138 305057 0 0 3 0x14280 nfsidl nfsio 7803 147332 0 0 3 0x14280 nfsidl nfsio 64496 320127 0 0 3 0x14280 nfsidl nfsio 89305 176849 0 0 3 0x14280 nfsidl nfsio 97085 26841 0 0 3 0x14280 nfsidl nfsio 52941 523865 0 0 3 0x14280 nfsidl nfsio 43323 72457 0 0 3 0x14280 nfsidl nfsio 98667 97353 0 0 3 0x14280 nfsidl nfsio 59664 261480 0 0 3 0x14280 nfsidl nfsio 35836 439433 0 0 3 0x14280 nfsidl nfsio 28151 837 0 0 3 0x14280 nfsidl nfsio 83332 333653 0 0 3 0x14280 nfsidl nfsio 31654 176935 0 0 3 0x14280 nfsidl nfsio 66300 420461 63111 0 3 0x80 nanoslp syz-executor 66300 85051 63111 0 3 0x4000080 ttyin syz-executor 66300 307094 63111 0 3 0x4000080 fsleep syz-executor 39158 203223 40650 0 3 0x80 nanoslp syz-executor 39158 107417 40650 0 3 0x4000080 kqsel syz-executor 39158 414 40650 0 3 0x4000080 fsleep syz-executor 80817 228253 731 0 3 0x80 nanoslp syz-executor 80817 286368 731 0 3 0x4000080 kqread syz-executor 80817 266032 731 0 3 0x4000080 ttyin syz-executor 80817 403182 731 0 3 0x4000080 fsleep syz-executor 40650 28608 68004 0 3 0x82 nanoslp syz-executor 19359 520446 68004 0 3 0x82 nanoslp syz-executor 731 29583 68004 0 3 0x82 nanoslp syz-executor 95573 51281 68004 0 3 0x82 nanoslp syz-executor 37968 405334 68004 0 3 0x82 nanoslp syz-executor 63111 403873 68004 0 3 0x82 nanoslp syz-executor 81911 85909 68004 0 3 0x82 nanoslp syz-executor 60508 446049 68004 0 3 0x82 nanoslp syz-executor 68004 237026 10798 0 3 0x82 kqread syz-executor 10798 105117 42288 0 3 0x10008a sigsusp ksh 42288 236646 94086 0 3 0x98 kqread sshd-session 94086 151913 14155 0 3 0x92 kqread sshd-session 81798 285593 1 0 3 0x100083 ttyin getty 14155 467362 1 0 3 0x88 kqread sshd 56959 356058 63764 74 3 0x1100092 bpf pflogd 63764 7358 1 0 3 0x80 sbwait pflogd 4839 300259 26151 73 3 0x1100090 kqread syslogd 26151 398273 1 0 3 0x100082 sbwait syslogd 46949 358657 1 0 3 0x100080 kqread resolvd 93889 106312 91702 77 3 0x100092 kqread dhcpleased 21031 399213 91702 77 3 0x100092 kqread dhcpleased 91702 505857 1 0 3 0x80 kqread dhcpleased 77886 432449 0 0 3 0x14200 bored smr 21289 188919 0 0 3 0x14200 pgzero zerothread 41761 336655 0 0 3 0x14200 aiodoned aiodoned 36802 320190 0 0 3 0x14200 syncer update 84083 389302 0 0 3 0x14200 cleaner cleaner 60825 39539 0 0 2 0x14200 reaper 92680 274308 0 0 3 0x14200 pgdaemon pagedaemon 61553 213249 0 0 3 0x14200 bored viomb 77138 387437 0 0 3 0x40014200 acpi0 acpi0 48634 378682 0 0 3 0x40014200 idle1 96116 234310 0 0 3 0x14200 bored softnet1 65131 412183 0 0 3 0x14200 bored softnet0 92118 295596 0 0 3 0x14200 bored systqmp 50732 96263 0 0 3 0x14200 bored systq 20981 497251 0 0 3 0x14200 tmoslp softclockmp 77427 117050 0 0 3 0x40014200 tmoslp softclock 747 188936 0 0 3 0x40014200 idle0 1 299960 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806c816810) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 mtx_enter+0x4b4 sys/kern/kern_lock.c:487 #2 pmap_do_remove+0xa9 rcr3 sys/arch/amd64/compile/SYZKALLER/obj/machine/cpufunc.h:139 [inline] #2 pmap_do_remove+0xa9 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:437 [inline] #2 pmap_do_remove+0xa9 sys/arch/amd64/amd64/pmap.c:1824 #3 uvm_unmap_kill_entry_withlock+0x269 sys/uvm/uvm_map.c:1863 #4 uvm_map_teardown+0x117 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:-1 [inline] #4 uvm_map_teardown+0x117 sys/uvm/uvm_map.c:2486 #5 exit1+0x6fc sys/kern/kern_exit.c:260 #6 sys_exit+0x1a sys/kern/kern_exit.c:-1 #7 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #7 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #8 Xsyscall+0x128 Process 9612 (syz-executor) thread 0xffff80003bbfda10 (224422) shared rwlock uobjlk r = 0 (0xfffffd806f5f06d8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvm_fault_lower_lookup+0x53 sys/uvm/uvm_fault.c:1204 #3 uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 #4 uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 #5 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #6 kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 #7 alltraps_kern_meltdown+0x7b #8 _copyin+0x5b #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #10 Xsyscall+0x128 shared rwlock amaplk r = 0 (0xfffffd805f08cce8) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvm_fault_check+0x8a9 sys/uvm/uvm_fault.c:834 #3 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #4 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #5 kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 #6 alltraps_kern_meltdown+0x7b #7 _copyin+0x5b #8 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 shared rwlock vmmaplk r = 0 (0xfffffd806c817308) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 rw_do_enter_read+0x3e8 sys/kern/kern_rwlock.c:413 #2 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1880 #3 uvm_fault_check+0x4f sys/uvm/uvm_fault.c:693 #4 uvm_fault+0x106 sys/uvm/uvm_fault.c:627 #5 kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 #6 kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 #7 alltraps_kern_meltdown+0x7b #8 _copyin+0x5b #9 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #9 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #10 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10214 11165K 11411K 166960K 11581 0 pcb 17 12K 12K 166960K 76 0 rtable 253 9K 9K 166960K 392 0 pf 36 17K 18K 166960K 63 0 ifaddr 44 7K 8K 166960K 56 0 ifgroup 57 2K 2K 166960K 82 0 sysctl 2 1K 9K 166960K 7 0 counters 76 37K 37K 166960K 100 0 ioctlops 0 0K 4K 166960K 1507 0 iov 0 0K 16K 166960K 9 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1372 86K 86K 166960K 1508 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 2K 3K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 4 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 97K 166960K 277 0 sigio 0 0K 0K 166960K 1 0 proc 72 115K 180K 166960K 540 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 16 0 in_multi 99 7K 7K 166960K 117 0 ether_multi 1 0K 0K 166960K 6 0 mrt 0 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 91 413K 413K 166960K 91 0 exec 0 0K 1K 166960K 399 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 239 161K 178K 166960K 4626 0 UVM aobj 7 8K 8K 166960K 8 0 pinsyscall 42 84K 108K 166960K 1446 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 13 0 NDP 13 0K 2K 166960K 34 0 temp 45 8668K 8739K 166960K 14296 0 kqueue 14 22K 26K 166960K 47 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 26 0 0 1 0 1 1 0 8 0 rtpcb 120 41 0 38 1 0 1 1 0 8 0 rtentry 176 116 0 4 6 0 6 6 0 8 0 unpcb 144 160 0 142 4 0 4 4 0 8 3 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 82 0 77 4 0 4 4 0 8 3 arp 136 18 0 0 1 0 1 1 0 8 0 inpcb 328 317 0 307 7 0 7 7 0 8 6 nd6 152 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1192 11 0 8 1 0 1 1 0 8 0 pppxif 1504 3 0 3 1 0 1 1 0 8 1 pffrag 232 2 0 0 1 0 1 1 0 482 0 pffrnode 88 2 0 0 1 0 1 1 0 8 0 pffrent 40 3 0 1 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 25 0 0 1 0 1 1 0 8 0 pfstkey 128 25 0 0 1 0 1 1 0 8 0 pfstate 448 25 0 0 3 0 3 3 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 481 0 18 30 0 30 30 0 8 1 art_table 40 483 0 18 5 0 5 5 0 8 0 art_node 32 116 0 14 1 0 1 1 0 8 0 semapl 112 2 0 0 1 0 1 1 0 8 0 shmpl 112 2 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1824 0 310 96 0 96 96 0 8 0 ffsino 296 1824 0 310 118 0 118 118 0 8 0 nchpl 144 2229 0 521 64 0 64 64 0 8 0 rtmask 32 3 0 2 1 0 1 1 0 8 0 vnodes 216 2009 0 0 112 0 112 112 0 8 0 namei 1024 6757 0 6757 2 0 2 2 0 8 2 percpumem 16 65 0 12 1 0 1 1 0 8 0 vcpupl 3968 3 0 0 1 0 1 1 0 8 0 vmpool 848 3 0 0 1 0 1 1 0 8 0 kstatmem 264 38 0 10 3 0 3 3 0 8 0 scxspl 216 9862 0 9862 9 1 8 8 1 8 8 plimitpl 152 51 0 31 1 0 1 1 0 8 0 sigapl 424 618 0 550 8 0 8 8 0 8 0 knotepl 120 313 0 0 10 0 10 10 0 8 0 kqueuepl 224 71 0 60 2 0 2 2 0 8 1 pipepl 344 132 0 103 3 0 3 3 0 8 0 fdescpl 528 582 0 551 3 0 3 3 0 8 0 filepl 160 2467 0 2222 13 0 13 13 0 8 2 lockfpl 104 64 0 59 1 0 1 1 0 8 0 lockfspl 48 32 0 27 1 0 1 1 0 8 0 sessionpl 144 23 0 14 1 0 1 1 0 8 0 pgrppl 48 31 0 14 1 0 1 1 0 8 0 ucredpl 104 213 0 200 1 0 1 1 0 8 0 zombiepl 144 552 0 550 1 0 1 1 0 8 0 processpl 1232 618 0 550 6 0 6 6 0 8 0 procpl 664 863 0 786 7 0 7 7 0 8 0 sockpl 752 522 0 491 10 0 10 10 0 8 6 mcl64k 65536 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 1 0 0 1 0 1 1 0 8 0 mcl4k 4096 124 0 0 16 0 16 16 0 8 0 mcl2k 2048 22 0 0 3 0 3 3 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 160 0 0 10 0 10 10 0 8 0 bufpl 280 3618 0 124 250 0 250 250 0 8 0 anonpl 32 10811 0 0 89 1 88 88 0 246 0 amapchunkpl 152 13213 0 12549 32 0 32 32 0 158 3 amappl16 200 1419 0 1396 26 2 24 24 0 8 19 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 6 0 6 1 1 0 1 0 8 0 amappl13 176 437 0 436 1 0 1 1 0 8 0 amappl12 168 953 0 912 3 0 3 3 0 8 0 amappl11 160 51 0 51 1 1 0 1 0 8 0 amappl10 152 50 0 35 1 0 1 1 0 8 0 amappl9 144 258 0 258 1 1 0 1 0 8 0 amappl8 136 22 0 20 1 0 1 1 0 8 0 amappl7 128 84 0 83 1 0 1 1 0 8 0 amappl6 120 290 0 277 1 0 1 1 0 8 0 amappl5 112 74 0 64 1 0 1 1 0 8 0 amappl4 104 433 0 401 1 0 1 1 0 8 0 amappl3 96 2305 0 2203 5 1 4 4 0 8 1 amappl2 88 545 0 485 2 0 2 2 0 8 0 amappl1 80 9940 0 9356 15 0 15 15 0 8 2 amappl 88 3832 0 3671 5 0 5 5 0 92 0 uvmvnodes 80 101 0 0 3 0 3 3 0 8 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 7 0 7 2 1 1 1 0 8 1 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 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 582 0 551 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 582 0 551 1 0 1 1 0 8 0 vmmpekpl 168 6620 0 6578 3 0 3 3 0 8 0 vmmpepl 168 44231 0 42345 105 0 105 105 0 357 5 vmsppl 488 581 0 550 5 0 5 5 0 8 1 rwobjpl 80 14771 0 13758 31 0 31 31 0 8 5 pdppl 4096 1177 0 1103 109 34 75 87 0 8 1 pvpl 32 16868 0 0 137 0 137 137 0 265 0 pmappl 256 584 0 550 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 288 0 36 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff8389eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff838bcd00) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838bcd00) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 cnputc(69) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(69) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8338c269) at db_printf+0x9b sys/kern/subr_prf.c:-1 panic(ffffffff833b4474) at panic+0x103 sys/kern/subr_prf.c:217 __assert(ffffffff833f108e,ffffffff833e6fa0,51d,ffffffff83424d02) at __assert+0x29 sys/kern/subr_prf.c:-1 end trace frame: 0xffff80003c4e76b0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff8389eff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:394 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 kd_curproc sys/dev/kcov.c:585 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x33 sys/dev/kcov.c:153 __mp_lock(ffffffff838bcd00) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff838bcd00) at __mp_lock+0x1a3 sys/kern/kern_lock.c:173 softintr_dispatch(0) at softintr_dispatch+0x125 sys/kern/kern_softintr.c:83 dosoftint(0) at dosoftint+0x54 sys/arch/amd64/amd64/intr.c:862 Xsoftclock() at Xsoftclock+0x27 cnputc(69) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(69) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff8338c269) at db_printf+0x9b sys/kern/subr_prf.c:-1 panic(ffffffff833b4474) at panic+0x103 sys/kern/subr_prf.c:217 __assert(ffffffff833f108e,ffffffff833e6fa0,51d,ffffffff83424d02) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageactivate(fffffd800851eba0) at uvm_pageactivate+0x1e3 sys/uvm/uvm_page.c:1306 uvm_fault_lower_lookup(ffff80003c4e7900,ffff80003c4e7938,ffff80003c4e7880) at uvm_fault_lower_lookup+0x2a4 sys/uvm/uvm_fault.c:1248 uvm_fault_lower(ffff80003c4e7900,ffff80003c4e7938,ffff80003c4e7880) at uvm_fault_lower+0x89 sys/uvm/uvm_fault.c:1334 uvm_fault(fffffd806c817208,200000000000,0,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 kpageflttrap(ffff80003c4e7ab0,200000000080) at kpageflttrap+0x2f4 sys/arch/amd64/amd64/trap.c:283 kerntrap(ffff80003c4e7ab0) at kerntrap+0x19c sys/arch/amd64/amd64/trap.c:520 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b _copyin() at _copyin+0x5b syscall(ffff80003c4e7dd0) at syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4e7dd0) at syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xc87998f6300, count: -24 ddb{0}> machine ddbcpu 1 Stopped at proc_trampoline+0xc7: movl $0,%gs:0x688 proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77b188554a80, count: 14 ddb{1}> trace proc_trampoline() at proc_trampoline+0xc7 end of kernel end trace frame: 0x77b188554a80, count: -1