panic: kernel diagnostic assertion "(pg->pg_flags & (PQ_INACTIVE|PQ_ACTIVE))W A==RN I0"N G: SfPaLil NeOdT: filLeO W"/sEREyD zkONa lSlYeSrC/AmLaLn 9a1g er1s19/3m0u1l3t0i00 cEoXrIeT/ 0ke crn Stopped at savectx+0xae: movl $0,%gs:0x688 TID PID UID PRFLAGS PFLAGS CPU COMMAND 484130 16541 0 0 0x4000000 0 syz-executor *490390 17714 0 0 0 1 syz-executor savectx() at savectx+0xae end of kernel end trace frame: 0x7061471beef0, 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 savectx() at savectx+0xae end of kernel end trace frame: 0x7061471beef0, count: -1 ddb{1}> show registers rdi 0 rsi 0 rbp 0xffff800030fcc9d0 rbx 0 rdx 0 rcx 0xffff80002a285ca0 rax 0x3b r8 0xffff800030fcc900 r9 0x1 r10 0x755a74d1eb6d5fcd r11 0x289f907fdec4f785 r12 0 r13 0 r14 0xffff80002a285ca0 r15 0 rip 0xffffffff825463ee savectx+0xae cs 0x8 rflags 0x46 rsp 0xffff800030fcc950 ss 0x10 savectx+0xae: movl $0,%gs:0x688 ddb{1}> show proc PROC (syz-executor) tid=490390 pid=17714 tcnt=3 stat=onproc flags process=0 proc=0 runpri=32, usrpri=82, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a285770,0xffff80002a2842c0 process=0xffff8000fffee698 user=0xffff800030fc7000, vmspace=0xfffffd806adda9a0 estcpu=32, cpticks=1, pctcpu=0.1, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 16541 495889 10313 0 3 0x80 fsleep syz-executor 16541 92078 10313 0 3 0x4000080 fsleep syz-executor 16541 484130 10313 0 7 0x4000000 syz-executor *17714 490390 83630 0 7 0 syz-executor 17714 464932 83630 0 3 0x4000080 kqsel syz-executor 17714 205064 83630 0 3 0x4000080 fsleep syz-executor 28533 292713 1885 0 3 0x80 fsleep syz-executor 28533 153318 1885 0 3 0x4000080 fsleep syz-executor 28533 349473 1885 0 3 0x4000080 sbwait syz-executor 28533 100285 1885 0 3 0x4000080 msgwait syz-executor 24576 521036 22385 0 3 0x80 fsleep syz-executor 24576 270640 22385 0 3 0x4000080 sbwait syz-executor 17194 61123 1779 0 3 0x80 fsleep syz-executor 17194 228833 1779 0 3 0x4000080 semwait syz-executor 17194 124805 1779 0 3 0x4000080 fsleep syz-executor 17194 278834 1779 0 3 0x4000080 fsleep syz-executor 24507 400268 36770 0 3 0x80 fsleep syz-executor 24507 16073 36770 0 3 0x4000080 sbwait syz-executor 41216 226380 1 0 3 0x100083 ttyin getty 1885 521649 29035 0 3 0x82 nanoslp syz-executor 39577 130508 0 0 3 0x14200 acct acct 29744 404830 16465 0 3 0x82 sbwait sshd-session 97225 185696 29035 0 3 0x82 nanoslp syz-executor 1779 176684 29035 0 2 0xc82 syz-executor 10313 385641 29035 0 3 0x82 nanoslp syz-executor 72283 138437 29035 0 2 0xc82 syz-executor 22385 499169 29035 0 2 0xc82 syz-executor 36770 192967 29035 0 2 0xc82 syz-executor 83630 349937 29035 0 3 0x82 nanoslp syz-executor 29035 473824 88197 0 3 0x82 kqread syz-executor 88197 497509 4639 0 3 0x10008a sigsusp ksh 4639 266156 41128 0 3 0x98 kqread sshd-session 41128 267968 16465 0 3 0x92 kqread sshd-session 16465 148324 1 0 3 0x88 kqread sshd 97349 44501 91421 74 3 0x1100092 bpf pflogd 91421 471401 1 0 3 0x80 sbwait pflogd 23819 70919 18879 73 3 0x1100090 kqread syslogd 18879 331483 1 0 3 0x100082 sbwait syslogd 1015 230930 1 0 3 0x100080 kqread resolvd 80930 302942 68350 77 3 0x100092 kqread dhcpleased 63802 227029 68350 77 3 0x100092 kqread dhcpleased 68350 234403 1 0 3 0x80 kqread dhcpleased 81186 261173 0 0 3 0x14200 bored smr 57460 142413 0 0 3 0x14200 pgzero zerothread 99182 512073 0 0 3 0x14200 aiodoned aiodoned 33915 168095 0 0 3 0x14200 syncer update 37534 496649 0 0 3 0x14200 cleaner cleaner 82507 310007 0 0 3 0x14200 reaper reaper 37143 289465 0 0 3 0x14200 pgdaemon pagedaemon 63768 121173 0 0 3 0x14200 bored viomb 49390 216126 0 0 3 0x40014200 acpi0 acpi0 27967 71951 0 0 3 0x40014200 idle1 89320 471881 0 0 3 0x14200 bored softnet1 85171 458701 0 0 3 0x14200 bored softnet0 68366 263545 0 0 3 0x14200 bored systqmp 36280 307553 0 0 3 0x14200 bored systq 90652 22820 0 0 3 0x14200 tmoslp softclockmp 92125 66783 0 0 3 0x40014200 tmoslp softclock 94720 362563 0 0 3 0x40014200 idle0 1 519903 0 0 3 0x82 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &sched_lock r = 0 (0xffffffff839f69b0) #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 sleep_finish+0x1d6 sys/kern/kern_synch.c:357 #3 sys_futex+0xb90 futex_wait sys/kern/sys_futex.c:306 [inline] #3 sys_futex+0xb90 sys/kern/sys_futex.c:155 #4 syscall+0xbd4 mi_syscall sys/sys/syscall_mi.h:176 [inline] #4 syscall+0xbd4 sys/arch/amd64/amd64/trap.c:775 #5 Xsyscall+0x128 Process 16541 (syz-executor) thread 0xffff8000fffebca8 (484130) exclusive rwlock uobjlk r = 0 (0xfffffd806dc2be58) #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_write+0x419 sys/kern/kern_rwlock.c:320 #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 uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1703 #6 uvm_map_pageable_wire+0x3dc sys/uvm/uvm_map.c:2125 #7 sys_mlock+0x23d sys/uvm/uvm_mmap.c:849 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 shared rwlock vmmaplk r = 0 (0xfffffd806aba2aa8) #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 uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1703 #6 uvm_map_pageable_wire+0x3dc sys/uvm/uvm_map.c:2125 #7 sys_mlock+0x23d sys/uvm/uvm_mmap.c:849 #8 syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] #8 syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 #9 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff839a3048) #0 witness_lock+0x5f1 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5f1 sys/kern/subr_witness.c:1160 #1 __mp_acquire_count+0x58 sys/kern/kern_lock.c:-1 #2 sleep_finish+0x2d8 sys/kern/kern_synch.c:369 #3 rw_do_enter_write+0x1dc sys/kern/kern_rwlock.c:298 #4 vm_map_lock_ln+0x12e sys/uvm/uvm_map.c:5163 #5 uvm_map_pageable+0x183 sys/uvm/uvm_map.c:2214 #6 sys_mlock+0x23d sys/uvm/uvm_mmap.c:849 #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10210 11027K 12834K 166960K 13269 0 pcb 18 14K 16K 166960K 265 0 rtable 218 9K 10K 166960K 505 0 pf 40 18K 25K 166960K 226 0 ifaddr 38 6K 7K 166960K 98 0 ifgroup 62 2K 2K 166960K 171 0 sysctl 1 1K 9K 166960K 7 0 counters 72 37K 37K 166960K 168 0 ioctlops 0 0K 8K 166960K 1860 0 iov 1 8K 20K 166960K 111 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1454 91K 92K 166960K 2311 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 12 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 29 0 dirhash 12 2K 2K 166960K 21 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 18 65K 236K 166960K 979 0 sigio 1 0K 0K 166960K 24 0 proc 73 131K 164K 166960K 642 0 subproc 72 4K 4K 166960K 82 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 196 0 in_multi 77 5K 7K 166960K 154 0 ether_multi 1 0K 0K 166960K 12 0 mrt 1 0K 0K 166960K 7 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 493 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 3 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 269 161K 177K 166960K 10480 0 UVM aobj 32 16K 18K 166960K 36 0 pinsyscall 45 90K 104K 166960K 2153 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 56 0 NDP 13 0K 2K 166960K 70 0 temp 78 8680K 8749K 166960K 43647 0 kqueue 13 20K 28K 166960K 185 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 120 156 0 153 3 2 1 3 0 8 0 rtentry 176 151 0 63 6 0 6 6 0 8 0 unpcb 144 653 0 625 8 4 4 4 0 8 2 syncache 336 9 0 9 3 3 0 1 0 8 0 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 736 314 0 307 11 7 4 7 0 8 3 arp 136 26 0 8 1 0 1 1 0 8 0 inpcb 328 1116 0 1102 18 14 4 10 0 8 2 nd6 152 31 0 10 1 0 1 1 0 8 0 pkpcb 40 9 0 9 3 2 1 1 0 8 1 kcovpl 48 9 0 1 1 0 1 1 0 8 0 ppxss 1192 33 0 33 4 3 1 1 0 8 1 pppxif 1504 5 0 5 2 1 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pffrag 232 7 0 2 1 0 1 1 0 482 0 pffrnode 88 7 0 2 1 0 1 1 0 8 0 pffrent 40 12 0 7 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 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfstitem 24 72 0 27 1 0 1 1 0 8 0 pfstkey 128 138 0 93 2 0 2 2 0 8 0 pfstate 448 103 0 60 5 0 5 5 0 8 0 pfrule 1344 28 0 23 2 1 1 2 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 626 0 237 34 6 28 30 0 8 1 art_table 40 629 0 237 5 0 5 5 0 8 0 art_node 32 149 0 69 1 0 1 1 0 8 0 sysvmsgpl 40 11 0 9 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 26 0 16 1 0 1 1 0 8 0 shmpl 112 25 0 3 1 0 1 1 0 8 0 dirhash 1024 23 0 6 3 0 3 3 0 8 0 dino2pl 256 3217 0 1707 96 0 96 96 0 8 0 ffsino 296 3217 0 1707 118 0 118 118 0 8 0 nchpl 144 4644 0 2937 64 0 64 64 0 8 0 rtmask 32 3 0 3 3 3 0 1 0 8 0 vnodes 216 3901 0 0 217 0 217 217 0 8 0 namei 1024 15722 0 15722 4 3 1 2 0 8 1 percpumem 16 99 0 48 1 0 1 1 0 8 0 vcpupl 3968 7 0 0 1 0 1 1 0 8 0 vmpool 840 8 0 1 1 0 1 1 0 8 0 kstatmem 264 106 0 76 5 2 3 3 0 8 1 scsiplug 72 7 0 7 4 4 0 1 0 8 0 scxspl 216 26979 0 26979 12 11 1 8 1 8 1 plimitpl 152 293 0 275 1 0 1 1 0 8 0 sigapl 424 1282 0 1232 7 1 6 7 0 8 0 knotepl 120 496 0 0 16 0 16 16 0 8 0 kqueuepl 224 502 0 492 8 3 5 5 0 8 3 pipepl 344 294 0 267 7 1 6 7 0 8 3 fdescpl 528 1264 0 1231 3 0 3 3 0 8 0 filepl 160 8300 0 7995 24 9 15 17 0 8 2 lockfpl 104 428 0 425 2 1 1 2 0 8 0 lockfspl 48 166 0 163 1 0 1 1 0 8 0 sessionpl 144 30 0 20 1 0 1 1 0 8 0 pgrppl 48 101 0 83 1 0 1 1 0 8 0 ucredpl 104 1077 0 1063 1 0 1 1 0 8 0 zombiepl 144 1353 0 1351 1 0 1 1 0 8 0 processpl 1232 1282 0 1232 6 2 4 5 0 8 0 procpl 664 2693 0 2631 6 0 6 6 0 8 0 sosppl 176 7 0 7 2 2 0 1 0 8 0 sockpl 752 1969 0 1924 33 22 11 18 0 8 5 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 2 0 0 1 0 1 1 0 8 0 mcl4k 4096 127 0 0 16 0 16 16 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 23 0 0 3 0 3 3 0 8 0 mtagpl 96 20 0 0 1 0 1 1 0 8 0 mbufpl 256 285 0 0 18 0 18 18 0 8 0 bufpl 280 10497 0 4361 439 0 439 439 0 8 0 anonpl 32 11997 0 0 97 0 97 97 0 246 0 amapchunkpl 152 35211 0 34522 50 23 27 35 0 158 0 amappl16 200 3968 0 3934 46 32 14 27 0 8 8 amappl15 192 3 0 3 1 1 0 1 0 8 0 amappl14 184 61 0 61 1 1 0 1 0 8 0 amappl13 176 435 0 434 1 0 1 1 0 8 0 amappl12 168 1646 0 1601 3 0 3 3 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 75 0 61 1 0 1 1 0 8 0 amappl9 144 264 0 264 1 1 0 1 0 8 0 amappl8 136 55 0 52 1 0 1 1 0 8 0 amappl7 128 82 0 80 1 0 1 1 0 8 0 amappl6 120 290 0 274 1 0 1 1 0 8 0 amappl5 112 78 0 66 1 0 1 1 0 8 0 amappl4 104 451 0 419 1 0 1 1 0 8 0 amappl3 96 7027 0 6906 4 0 4 4 0 8 0 amappl2 88 595 0 526 2 0 2 2 0 8 0 amappl1 80 14378 0 13695 17 0 17 17 0 8 0 amappl 88 9576 0 9390 5 0 5 5 0 92 0 uvmvnodes 80 139 0 0 3 0 3 3 0 8 0 dma65536 65536 1 0 1 1 0 1 1 0 8 1 dma32768 32768 2 0 2 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 2 0 2 2 1 1 1 0 8 1 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 7 0 7 2 2 0 1 0 8 0 dma128 128 256 0 256 3 3 0 1 0 8 0 dma64 64 7 0 7 2 1 1 1 0 8 1 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 35 0 4 1 0 1 1 0 8 0 uaddrrnd 24 1264 0 1231 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1264 0 1231 1 0 1 1 0 8 0 vmmpekpl 168 12252 0 12212 3 0 3 3 0 8 0 vmmpepl 168 87804 0 85669 124 21 103 112 0 357 6 vmsppl 488 1263 0 1231 5 0 5 5 0 8 0 rwobjpl 80 25996 0 24758 34 2 32 34 0 8 0 pdppl 4096 2551 0 2471 119 39 80 83 0 8 0 pvpl 32 20597 0 0 167 1 166 166 0 265 0 pmappl 256 1271 0 1232 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 329 0 63 8 0 8 8 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff83890ff0) 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(ffffffff839a2e40) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839a2e40) 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(6e) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83387a6b) at db_printf+0x9b sys/kern/subr_prf.c:-1 panic(ffffffff833affa3) at panic+0x103 sys/kern/subr_prf.c:217 __assert(ffffffff833f02e7,ffffffff833e4b7f,51d,ffffffff834222dd) at __assert+0x29 sys/kern/subr_prf.c:-1 end trace frame: 0xffff80003c4312f0, count: 0 ddb{0}> trace x86_ipi_db(ffffffff83890ff0) 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(ffffffff839a2e40) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:142 [inline] __mp_lock(ffffffff839a2e40) 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(6e) at cnputc+0x67 sys/dev/cons.c:218 db_putchar(6e) at db_putchar+0x36d sys/ddb/db_output.c:155 kprintf() at kprintf+0x29c5 sys/kern/subr_prf.c:-1 db_printf(ffffffff83387a6b) at db_printf+0x9b sys/kern/subr_prf.c:-1 panic(ffffffff833affa3) at panic+0x103 sys/kern/subr_prf.c:217 __assert(ffffffff833f02e7,ffffffff833e4b7f,51d,ffffffff834222dd) at __assert+0x29 sys/kern/subr_prf.c:-1 uvm_pageactivate(fffffd8008f908a8) at uvm_pageactivate+0x1e3 sys/uvm/uvm_page.c:1306 uvm_fault_lower(ffff80003c4314b0,ffff80003c4314e8,ffff80003c431430) at uvm_fault_lower+0x25c sys/uvm/uvm_fault.c:1379 uvm_fault(fffffd806aba29a8,200000000000,2,1) at uvm_fault+0x274 sys/uvm/uvm_fault.c:-1 uvm_fault_wire(fffffd806aba29a8,200000000000,200000013000,1) at uvm_fault_wire+0x73 sys/uvm/uvm_fault.c:1703 uvm_map_pageable_wire(fffffd806aba29a8,fffffd806aa18628,fffffd806aa18238,ffff8000fffebca8,0,0) at uvm_map_pageable_wire+0x3dc sys/uvm/uvm_map.c:2125 sys_mlock(ffff8000fffebca8,ffff80003c4317d0,ffff80003c431720) at sys_mlock+0x23d sys/uvm/uvm_mmap.c:849 syscall(ffff80003c4317d0) at syscall+0xb17 mi_syscall sys/sys/syscall_mi.h:176 [inline] syscall(ffff80003c4317d0) at syscall+0xb17 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x1c3aaa65b80, count: -22 ddb{0}> machine ddbcpu 1 Stopped at savectx+0xae: movl $0,%gs:0x688 savectx() at savectx+0xae end of kernel end trace frame: 0x7061471beef0, count: 14 ddb{1}> trace savectx() at savectx+0xae end of kernel end trace frame: 0x7061471beef0, count: -1