panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *505443 96778 0 0x8000000 0 1 syz-executor.1 371116 44430 0 0x1a000002 0x4000000 0 syz-fuzzer db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82954aaa) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8290d6f0,ffffffff828b371f,90,ffffffff82912fc1) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd8007447240,fffffd8066a0a908,3d73000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd8066a0a908,3d73000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd8066a0a8b8,f5cc4163000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd8066a0a8b8,f5cc4163000,6b109000,4,20) at pmap_enter+0x2c6 sys/arch/amd64/amd64/pmap.c:2722 uvm_fault_lower_lookup(ffff800033d51170,ffff800033d511a8,ffff800033d510f0) at uvm_fault_lower_lookup+0x29b sys/uvm/uvm_fault.c:1192 uvm_fault_lower(ffff800033d51170,ffff800033d511a8,ffff800033d510f0,0) at uvm_fault_lower+0x62 sys/uvm/uvm_fault.c:1227 uvm_fault(fffffd806560e540,f5cc4166000,0,4) at uvm_fault+0x255 sys/uvm/uvm_fault.c:637 upageflttrap(ffff800033d512f0,f5cc416695a) at upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800033d512f0) at usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7a69aa8eb640, count: 2 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: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82954aaa) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8290d6f0,ffffffff828b371f,90,ffffffff82912fc1) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd8007447240,fffffd8066a0a908,3d73000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd8066a0a908,3d73000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd8066a0a8b8,f5cc4163000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd8066a0a8b8,f5cc4163000,6b109000,4,20) at pmap_enter+0x2c6 sys/arch/amd64/amd64/pmap.c:2722 uvm_fault_lower_lookup(ffff800033d51170,ffff800033d511a8,ffff800033d510f0) at uvm_fault_lower_lookup+0x29b sys/uvm/uvm_fault.c:1192 uvm_fault_lower(ffff800033d51170,ffff800033d511a8,ffff800033d510f0,0) at uvm_fault_lower+0x62 sys/uvm/uvm_fault.c:1227 uvm_fault(fffffd806560e540,f5cc4166000,0,4) at uvm_fault+0x255 sys/uvm/uvm_fault.c:637 upageflttrap(ffff800033d512f0,f5cc416695a) at upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800033d512f0) at usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7a69aa8eb640, count: -13 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800033d50bf0 rbx 0xffff800029ceccdf rdx 0 rcx 0xffff8000ffff74a0 rax 0xffff800029cebff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0xc9e3f19a8630bb73 r11 0x28f97183a96b222c r12 0xffff800029cecae0 r13 0 r14 0 r15 0x1 rip 0xffffffff8195b50c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff800033d50be0 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) tid=505443 pid=96778 tcnt=2 stat=onproc flags process=8000000 proc=0 runpri=76, usrpri=76, slppri=16, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff8000ffff79c0,0xffff80002f0b6a90 process=0xffff80003737c020 user=0xffff800033d4c000, vmspace=0xfffffd806560e540 estcpu=26, cpticks=5, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 90543 291680 86669 0 2 0x8000000 syz-executor.0 90543 164838 86669 0 3 0xc000080 fsleep syz-executor.0 89548 507994 58346 0 2 0x8000000 syz-executor.5 65896 396346 54932 0 2 0x8000000 syz-executor.2 65896 252486 54932 0 2 0xc000000 syz-executor.2 63651 432561 64051 0 2 0x8000000 syz-executor.4 63651 360331 64051 0 3 0xc000080 fsleep syz-executor.4 *96778 505443 85408 0 7 0x8000000 syz-executor.1 96778 48122 85408 0 3 0xc000080 sbwait syz-executor.1 55786 15931 51039 0 2 0x8000000 syz-executor.7 55786 428669 51039 0 2 0xc000000 syz-executor.7 11904 261479 28827 0 2 0x8000000 syz-executor.3 56170 478965 0 0 3 0x14200 acct acct 51039 414847 44430 0 3 0x8000082 nanoslp syz-executor.7 86669 69813 44430 0 3 0x8000082 nanoslp syz-executor.0 54932 445668 44430 0 3 0x8000082 nanoslp syz-executor.2 58346 16074 44430 0 2 0x8000482 syz-executor.5 31985 58296 1 0 3 0x18100083 ttyin getty 23733 491033 44430 0 2 0x8000002 syz-executor.6 28827 79009 44430 0 3 0x8000082 nanoslp syz-executor.3 64051 267272 44430 0 3 0x8000082 nanoslp syz-executor.4 85408 256409 44430 0 3 0x8000082 nanoslp syz-executor.1 21973 375477 0 0 3 0x14200 bored sosplice 44430 470455 73426 0 3 0x1a000082 wait syz-fuzzer 44430 306529 73426 0 2 0x1e000082 syz-fuzzer 44430 121346 73426 0 3 0x1e000082 thrsleep syz-fuzzer 44430 497948 73426 0 3 0x1e000082 wait syz-fuzzer 44430 375286 73426 0 3 0x1e000082 wait syz-fuzzer 44430 230410 73426 0 3 0x1e000082 thrsleep syz-fuzzer 44430 211428 73426 0 3 0x1e000082 wait syz-fuzzer 44430 432699 73426 0 3 0x1e000082 wait syz-fuzzer 44430 294495 73426 0 3 0x1e000082 thrsleep syz-fuzzer 44430 321746 73426 0 3 0x1e000082 wait syz-fuzzer 44430 129332 73426 0 3 0x1e000082 thrsleep syz-fuzzer 44430 371116 73426 0 7 0x1e000002 syz-fuzzer 44430 398224 73426 0 3 0x1e000082 thrsleep syz-fuzzer 44430 114939 73426 0 3 0x1e000082 wait syz-fuzzer 44430 329182 73426 0 2 0x1e000082 syz-fuzzer 44430 2072 73426 0 3 0x1e000082 wait syz-fuzzer 73426 522641 42830 0 3 0x810008a sigsusp ksh 42830 409879 14080 0 2 0x1800009a sshd 14080 3954 1 0 3 0x18000088 kqread sshd 4447 380746 77405 74 3 0x19100092 bpf pflogd 77405 366453 1 0 3 0x18000080 sbwait pflogd 87539 200626 804 73 3 0x19100090 kqread syslogd 804 212165 1 0 3 0x18100082 sbwait syslogd 28423 379233 1 0 3 0x18100080 kqread resolvd 86031 180589 27741 77 3 0x18100092 kqread dhcpleased 98031 484766 27741 77 3 0x18100092 kqread dhcpleased 27741 359515 1 0 3 0x18000080 kqread dhcpleased 26850 452504 0 0 3 0x14200 bored smr 45870 329539 0 0 2 0x14200 zerothread 25046 133177 0 0 3 0x14200 aiodoned aiodoned 15 423549 0 0 3 0x14200 syncer update 80775 429200 0 0 3 0x14200 cleaner cleaner 7046 131473 0 0 3 0x14200 reaper reaper 70627 507744 0 0 3 0x14200 pgdaemon pagedaemon 99002 67214 0 0 3 0x14200 bored viomb 86523 308572 0 0 3 0x40014200 acpi0 acpi0 92281 129223 0 0 3 0x40014200 idle1 55874 49067 0 0 3 0x14200 bored softnet3 82298 169959 0 0 3 0x14200 bored softnet2 63871 289562 0 0 3 0x14200 bored softnet1 48480 48900 0 0 2 0x14200 softnet0 88712 470148 0 0 3 0x14200 bored systqmp 33987 405946 0 0 3 0x14200 bored systq 87988 190402 0 0 3 0x14200 tmoslp softclockmp 61288 94653 0 0 3 0x40014200 tmoslp softclock 28361 429167 0 0 3 0x40014200 idle0 1 388093 0 0 3 0x8080082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8066a0a8c8) #0 witness_lock+0x446 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x446 sys/kern/subr_witness.c:1187 #1 mtx_enter_try+0x103 #2 mtx_enter+0x4e sys/kern/kern_lock.c:266 #3 pmap_enter+0x1c6 rcr3 machine/cpufunc.h:141 [inline] #3 pmap_enter+0x1c6 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:425 [inline] #3 pmap_enter+0x1c6 sys/arch/amd64/amd64/pmap.c:2716 #4 uvm_fault_lower_lookup+0x29b sys/uvm/uvm_fault.c:1192 #5 uvm_fault_lower+0x62 sys/uvm/uvm_fault.c:1227 #6 uvm_fault+0x255 sys/uvm/uvm_fault.c:637 #7 upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 #8 usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 #9 recall_trap+0x8 Process 96778 (syz-executor.1) thread 0xffff8000ffff74a0 (505443) Process 44430 (syz-fuzzer) thread 0xffff80002a21af88 (371116) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10193 6504K 6750K 166960K 12314 0 pcb 17 14K 16K 166960K 494 0 rtable 216 15K 17K 166960K 1691 0 pf 34 9K 10K 166960K 205 0 ifaddr 42 15K 16K 166960K 232 0 ifgroup 59 2K 2K 166960K 335 0 sysctl 4 1K 1K 166960K 11 0 counters 66 36K 37K 166960K 206 0 ioctlops 0 0K 4K 166960K 1682 0 iov 0 0K 16K 166960K 214 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1437 90K 91K 166960K 2979 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 74 0 VM map 2 1K 1K 166960K 2 0 sem 14 1K 1K 166960K 206 0 dirhash 12 2K 2K 166960K 81 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 17 61K 89K 166960K 3385 0 sigio 0 0K 0K 166960K 83 0 proc 71 91K 140K 166960K 1742 0 subproc 104 6K 7K 166960K 549 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 515 0 in_multi 84 6K 7K 166960K 616 0 ether_multi 1 0K 0K 166960K 26 0 mrt 3 0K 0K 166960K 20 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 85 387K 387K 166960K 85 0 exec 0 0K 1K 166960K 1228 0 pfkey data 0 0K 0K 166960K 9 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 357 168K 168K 166960K 31357 0 UVM aobj 99 6K 6K 166960K 120 0 pinsyscall 41 82K 108K 166960K 5488 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 251 0 NDP 13 0K 2K 166960K 167 0 temp 77 6816K 7312K 166960K 97378 0 kqueue 12 18K 27K 166960K 465 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 120 335 0 332 1 0 1 1 0 8 0 rtentry 112 573 0 480 5 1 4 4 0 8 0 unpcb 144 2659 0 2642 16 15 1 4 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpqe 32 39 0 39 1 1 0 1 0 8 0 tcpcb 808 1117 0 1111 32 28 4 8 0 8 3 arp 120 125 0 109 1 0 1 1 0 8 0 inpcb 392 3638 0 3628 41 36 5 14 0 8 4 nd6 136 145 0 124 1 0 1 1 0 8 0 pkpcb 40 23 0 23 12 12 0 1 0 8 0 kcovpl 48 42 0 34 1 0 1 1 0 8 0 ppxss 1168 14 0 14 8 8 0 1 0 8 0 pffrag 232 30 0 26 1 0 1 1 0 482 0 pffrnode 88 29 0 25 1 0 1 1 0 8 0 pffrent 40 43 0 39 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 24 263 0 227 1 0 1 1 0 8 0 pfstkey 128 263 0 227 2 0 2 2 0 8 0 pfstate 376 263 0 227 6 0 6 6 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 1 2 1 1 2 0 8 0 art_heap4 256 2153 0 1747 49 18 31 32 0 8 0 art_table 32 2155 0 1748 5 0 5 5 0 8 0 art_node 16 564 0 479 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 11 1 0 1 1 0 8 0 semupl 112 8 0 8 2 2 0 1 0 8 0 semapl 112 200 0 188 1 0 1 1 0 8 0 shmpl 112 117 0 21 3 0 3 3 0 8 0 dirhash 1024 63 0 46 3 0 3 3 0 8 0 dino2pl 256 6615 0 5078 97 0 97 97 0 8 0 ffsino 272 6615 0 5078 104 0 104 104 0 8 0 nchpl 144 11560 0 9822 67 0 67 67 0 8 0 uvmvnodes 80 7195 0 0 147 0 147 147 0 8 0 vnodes 216 7195 0 0 400 0 400 400 0 8 0 namei 1024 39224 0 39224 8 7 1 3 0 8 1 percpumem 16 117 0 70 1 0 1 1 0 8 0 vcpupl 3904 23 0 3 3 0 3 3 0 8 0 vmpool 696 30 0 10 3 1 2 2 0 8 0 kstatmem 264 166 0 140 5 3 2 3 0 8 0 scsiplug 72 7 0 7 5 5 0 1 0 8 0 scxspl 216 59982 0 59982 22 19 3 8 1 8 3 plimitpl 152 391 0 375 1 0 1 1 0 8 0 sigapl 424 3658 0 3608 10 3 7 9 0 8 0 futexpl 64 44365 0 44363 1 0 1 1 0 8 0 knotepl 120 750 0 0 19 0 19 19 0 8 0 kqueuepl 216 873 0 864 1 0 1 1 0 8 0 pipepl 320 648 0 620 4 1 3 4 0 8 0 fdescpl 496 3617 0 3587 5 0 5 5 0 8 0 filepl 152 21276 0 21029 27 15 12 16 0 8 1 lockfpl 104 692 0 690 1 0 1 1 0 8 0 lockfspl 48 280 0 278 1 0 1 1 0 8 0 sessionpl 144 62 0 45 1 0 1 1 0 8 0 pgrppl 48 122 0 105 1 0 1 1 0 8 0 ucredpl 104 3119 0 3107 1 0 1 1 0 8 0 zombiepl 144 3608 0 3608 3 2 1 1 0 8 1 processpl 1136 3658 0 3608 6 0 6 6 0 8 1 procpl 656 7312 0 7242 11 2 9 10 0 8 0 srpgc 96 33 0 33 11 11 0 1 0 8 0 sosppl 168 40 0 40 14 13 1 1 0 8 1 sockpl 664 6697 0 6667 45 38 7 15 0 8 4 mcl64k 65536 12 0 0 2 0 2 2 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 10 0 0 1 0 1 1 0 8 0 mcl2k 2048 404 0 0 43 1 42 43 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 1138 0 0 62 0 62 62 0 8 0 bufpl 280 13124 0 5857 520 0 520 520 0 8 0 anonpl 24 532947 0 526262 185 124 61 92 0 186 3 amapchunkpl 152 100578 0 99907 91 60 31 42 0 158 0 amappl16 200 12602 0 12474 93 79 14 21 0 8 4 amappl15 192 10 0 10 2 2 0 1 0 8 0 amappl14 184 302 0 287 2 1 1 2 0 8 0 amappl13 176 17 0 17 2 2 0 1 0 8 0 amappl12 168 4820 0 4788 4 1 3 3 0 8 0 amappl11 160 87 0 72 1 0 1 1 0 8 0 amappl10 152 84 0 74 1 0 1 1 0 8 0 amappl9 144 199 0 198 1 0 1 1 0 8 0 amappl8 136 710 0 588 5 0 5 5 0 8 0 amappl7 128 67 0 52 1 0 1 1 0 8 0 amappl6 120 854 0 827 3 1 2 2 0 8 0 amappl5 112 396 0 381 1 0 1 1 0 8 0 amappl4 104 984 0 935 2 0 2 2 0 8 0 amappl3 96 19416 0 19337 3 0 3 3 0 8 0 amappl2 88 4311 0 4219 5 2 3 4 0 8 0 amappl1 80 23745 0 23202 23 10 13 23 0 8 0 amappl 88 30180 0 29979 6 0 6 6 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 72 119 0 21 2 0 2 2 0 8 0 uaddrrnd 24 3648 0 3598 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 3648 0 3598 1 0 1 1 0 8 0 vmmpekpl 168 29916 0 29845 5 1 4 4 0 8 0 vmmpepl 168 244494 0 242355 186 74 112 119 0 357 0 vmsppl 440 3647 0 3598 8 2 6 6 0 8 0 rwobjpl 56 70223 0 61667 132 10 122 124 0 8 0 pdppl 4096 7303 0 7216 278 188 90 91 0 8 3 pvpl 32 47051 0 0 382 2 380 380 0 265 0 pmappl 248 3647 0 3598 4 0 4 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 699 0 254 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82cddff0) at x86_ipi_db+0x1e 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+0x27 __mp_lock(ffffffff82d98530) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d98530) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 spllower(0) at spllower+0x8b sys/arch/amd64/amd64/intr.c:736 msleep(fffffd806eeae288,fffffd806eeae288,318,ffffffff8290246f,1a) at msleep+0x204 sys/kern/kern_synch.c:255 kqueue_sleep(fffffd806eeae288,ffff80002f0c9d88) at kqueue_sleep+0xfa sys/kern/kern_event.c:1339 kqueue_scan(ffff80002f0c9b80,8,ffff80002f0c9c80,ffff80002f0c9d88,ffff80002a21af88,ffff80002f0c9dc8) at kqueue_scan+0x1bc sys/kern/kern_event.c:1394 sys_kevent(ffff80002a21af88,ffff80002f0c9f10,ffff80002f0c9e60) at sys_kevent+0x567 sys/kern/kern_event.c:1062 syscall(ffff80002f0c9f10) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002f0c9f10) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x286284de0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff82cddff0) at x86_ipi_db+0x1e 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+0x27 __mp_lock(ffffffff82d98530) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82d98530) at __mp_lock+0x122 sys/kern/kern_lock.c:147 softintr_dispatch(0) at softintr_dispatch+0x52 sys/arch/amd64/amd64/softintr.c:88 Xsoftclock() at Xsoftclock+0x27 spllower(0) at spllower+0x8b sys/arch/amd64/amd64/intr.c:736 msleep(fffffd806eeae288,fffffd806eeae288,318,ffffffff8290246f,1a) at msleep+0x204 sys/kern/kern_synch.c:255 kqueue_sleep(fffffd806eeae288,ffff80002f0c9d88) at kqueue_sleep+0xfa sys/kern/kern_event.c:1339 kqueue_scan(ffff80002f0c9b80,8,ffff80002f0c9c80,ffff80002f0c9d88,ffff80002a21af88,ffff80002f0c9dc8) at kqueue_scan+0x1bc sys/kern/kern_event.c:1394 sys_kevent(ffff80002a21af88,ffff80002f0c9f10,ffff80002f0c9e60) at sys_kevent+0x567 sys/kern/kern_event.c:1062 syscall(ffff80002f0c9f10) at syscall+0x8cf mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002f0c9f10) at syscall+0x8cf sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x286284de0, count: -13 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82954aaa) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8290d6f0,ffffffff828b371f,90,ffffffff82912fc1) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd8007447240,fffffd8066a0a908,3d73000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd8066a0a908,3d73000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd8066a0a8b8,f5cc4163000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd8066a0a8b8,f5cc4163000,6b109000,4,20) at pmap_enter+0x2c6 sys/arch/amd64/amd64/pmap.c:2722 uvm_fault_lower_lookup(ffff800033d51170,ffff800033d511a8,ffff800033d510f0) at uvm_fault_lower_lookup+0x29b sys/uvm/uvm_fault.c:1192 uvm_fault_lower(ffff800033d51170,ffff800033d511a8,ffff800033d510f0,0) at uvm_fault_lower+0x62 sys/uvm/uvm_fault.c:1227 uvm_fault(fffffd806560e540,f5cc4166000,0,4) at uvm_fault+0x255 sys/uvm/uvm_fault.c:637 upageflttrap(ffff800033d512f0,f5cc416695a) at upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800033d512f0) at usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7a69aa8eb640, count: 2 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82954aaa) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8290d6f0,ffffffff828b371f,90,ffffffff82912fc1) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd8007447240,fffffd8066a0a908,3d73000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd8066a0a908,3d73000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd8066a0a8b8,f5cc4163000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd8066a0a8b8,f5cc4163000,6b109000,4,20) at pmap_enter+0x2c6 sys/arch/amd64/amd64/pmap.c:2722 uvm_fault_lower_lookup(ffff800033d51170,ffff800033d511a8,ffff800033d510f0) at uvm_fault_lower_lookup+0x29b sys/uvm/uvm_fault.c:1192 uvm_fault_lower(ffff800033d51170,ffff800033d511a8,ffff800033d510f0,0) at uvm_fault_lower+0x62 sys/uvm/uvm_fault.c:1227 uvm_fault(fffffd806560e540,f5cc4166000,0,4) at uvm_fault+0x255 sys/uvm/uvm_fault.c:637 upageflttrap(ffff800033d512f0,f5cc416695a) at upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800033d512f0) at usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x7a69aa8eb640, count: -13