panic: kernel diagnostic assertion "dupe == NULL" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_page.c", line 144 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *439113 81865 0 0x8000002 0 1 syz-executor 412273 59926 0 0x14000 0x40000200 0 softclock db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830de359) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83094712,ffffffff8303a1f8,90,ffffffff8309a677) at __assert+0x29 uvm_pagealloc_pg(fffffd8007efe9e0,fffffd806adf4138,3886d3f000,0) at uvm_pagealloc_pg+0x521 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd806adf4138,3886d3f000,0,3) at uvm_pagealloc+0x23e sys/uvm/uvm_page.c:912 pmap_get_ptp(fffffd806adf4108,710da7e72000) at pmap_get_ptp+0x1c6 pmap_enter(fffffd806adf4108,710da7e72000,67a03000,3,20) at pmap_enter+0x389 uvm_fault_upper_lookup(ffff8000371cfb10,ffff8000371cfb48,ffff8000371cfa10,ffff8000371cfa90) at uvm_fault_upper_lookup+0x389 uvm_fault(fffffd8068aa76f0,710da7e73000,0,1) at uvm_fault+0x169 sys/uvm/uvm_fault.c:605 upageflttrap(ffff8000371cfc90,710da7e735a0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff8000371cfc90) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x710da7e73640, count: 3 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+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830de359) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83094712,ffffffff8303a1f8,90,ffffffff8309a677) at __assert+0x29 uvm_pagealloc_pg(fffffd8007efe9e0,fffffd806adf4138,3886d3f000,0) at uvm_pagealloc_pg+0x521 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd806adf4138,3886d3f000,0,3) at uvm_pagealloc+0x23e sys/uvm/uvm_page.c:912 pmap_get_ptp(fffffd806adf4108,710da7e72000) at pmap_get_ptp+0x1c6 pmap_enter(fffffd806adf4108,710da7e72000,67a03000,3,20) at pmap_enter+0x389 uvm_fault_upper_lookup(ffff8000371cfb10,ffff8000371cfb48,ffff8000371cfa10,ffff8000371cfa90) at uvm_fault_upper_lookup+0x389 uvm_fault(fffffd8068aa76f0,710da7e73000,0,1) at uvm_fault+0x169 sys/uvm/uvm_fault.c:605 upageflttrap(ffff8000371cfc90,710da7e735a0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff8000371cfc90) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x710da7e73640, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000371cf630 rbx 0xffff800029b7cd87 rdx 0 rcx 0xffff80002d168550 rax 0xffff800029b7bff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x8ea75f1a6a01456f r11 0x6ef9d878496b13ed r12 0xffff800029b7cb88 r13 0 r14 0 r15 0x1 rip 0xffffffff822d8415 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371cf620 ss 0 db_enter+0x25: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor) tid=439113 pid=81865 tcnt=1 stat=onproc flags process=8000002 proc=0 runpri=17, usrpri=84, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002d168040,0xffff8000371e3990 process=0xffff8000371b5fd8 user=0xffff8000371ca000, vmspace=0xfffffd8068aa76f0 estcpu=34, cpticks=1, pctcpu=0.0, user=0, sys=9, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 12359 162592 28056 0 2 0x8000002 sh 43050 296981 33068 0 2 0x8000000 syz-executor 43050 252629 33068 0 3 0xc000080 fsleep syz-executor 14564 87395 65649 0 2 0x8000000 syz-executor 14564 398455 65649 0 3 0xc000080 fsleep syz-executor 76297 46200 57907 0 2 0x8000010 syz-executor 76297 19375 57907 0 3 0xc000090 kqread syz-executor 75679 117252 66080 0 2 0x8000000 syz-executor 75679 92573 66080 0 2 0xc000000 syz-executor 75679 413799 66080 0 3 0xc000080 fsleep syz-executor 75679 136748 66080 0 3 0xc000080 fsleep syz-executor 76667 408542 1151 0 2 0x8000000 syz-executor 76667 61391 1151 0 3 0xc000080 fsleep syz-executor 28056 428082 87442 0 3 0x8000082 wait syz-executor 33068 395611 87442 0 3 0x8000082 nanoslp syz-executor 65649 102165 87442 0 3 0x8000082 nanoslp syz-executor 57907 516872 87442 0 3 0x8000082 nanoslp syz-executor 97613 518001 87442 0 2 0x8000002 syz-executor *81865 439113 87442 0 7 0x8000002 syz-executor 66080 158059 87442 0 3 0x8000082 nanoslp syz-executor 1151 267792 87442 0 3 0x8000082 nanoslp syz-executor 1446 314310 1 0 3 0x18100083 ttyin getty 14361 410938 0 0 3 0x14200 bored sosplice 62431 113167 0 0 3 0x14280 nfsidl nfsio 7976 284229 0 0 3 0x14280 nfsidl nfsio 9839 174649 0 0 3 0x14280 nfsidl nfsio 51787 419034 0 0 3 0x14280 nfsidl nfsio 8579 39698 0 0 3 0x14280 nfsidl nfsio 70682 365905 0 0 3 0x14280 nfsidl nfsio 97175 255392 0 0 3 0x14280 nfsidl nfsio 54633 353932 0 0 3 0x14280 nfsidl nfsio 47479 175611 0 0 3 0x14280 nfsidl nfsio 81155 437829 0 0 3 0x14280 nfsidl nfsio 50892 197082 0 0 3 0x14280 nfsidl nfsio 62439 387756 0 0 3 0x14280 nfsidl nfsio 92238 167620 0 0 3 0x14280 nfsidl nfsio 62024 233358 0 0 3 0x14280 nfsidl nfsio 86303 375723 0 0 3 0x14280 nfsidl nfsio 66392 191139 0 0 3 0x14280 nfsidl nfsio 28524 110030 0 0 3 0x14280 nfsidl nfsio 65792 443313 0 0 3 0x14280 nfsidl nfsio 37229 360311 0 0 3 0x14280 nfsidl nfsio 29931 327960 0 0 3 0x14280 nfsidl nfsio 87442 324991 98379 0 3 0x8000082 kqread syz-executor 98379 7391 44303 0 3 0x810008a sigsusp ksh 44303 465850 49480 0 3 0x18000098 kqread sshd-session 49480 174095 89384 0 3 0x18000092 kqread sshd-session 89384 506709 1 0 3 0x18000088 kqread sshd 9482 379142 96926 74 3 0x19100092 bpf pflogd 96926 352214 1 0 3 0x18000080 sbwait pflogd 23370 493108 16056 73 2 0x19100090 syslogd 16056 331714 1 0 3 0x18100082 sbwait syslogd 80353 263576 1 0 3 0x18100080 kqread resolvd 20480 432466 77522 77 3 0x18100092 kqread dhcpleased 68266 93353 77522 77 3 0x18100092 kqread dhcpleased 77522 135294 1 0 3 0x18000080 kqread dhcpleased 75767 518071 0 0 3 0x14200 bored smr 66648 134172 0 0 2 0x14200 zerothread 18536 247725 0 0 3 0x14200 aiodoned aiodoned 58214 288692 0 0 3 0x14200 syncer update 78095 130172 0 0 3 0x14200 cleaner cleaner 99158 32068 0 0 3 0x14200 reaper reaper 99322 366030 0 0 3 0x14200 pgdaemon pagedaemon 35447 455782 0 0 3 0x14200 bored viomb 79075 344413 0 0 3 0x40014200 acpi0 acpi0 4743 238548 0 0 3 0x40014200 idle1 43681 82392 0 0 3 0x14200 bored softnet3 31315 453290 0 0 3 0x14200 bored softnet2 80798 456756 0 0 3 0x14200 bored softnet1 87524 22298 0 0 3 0x14200 bored softnet0 93571 383323 0 0 3 0x14200 bored systqmp 70550 389649 0 0 3 0x14200 bored systq 35510 34051 0 0 3 0x14200 tmoslp softclockmp 59926 412273 0 0 7 0x40014200 softclock 2463 375215 0 0 3 0x40014200 idle0 1 435940 0 0 3 0x8000082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806adf4118) #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 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:430 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2756 #4 uvm_fault_upper_lookup+0x389 #5 uvm_fault+0x169 sys/uvm/uvm_fault.c:605 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 81865 (syz-executor) thread 0xffff80002d168550 (439113) exclusive rwlock amaplk r = 0 (0xfffffd8058fb9588) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 uvm_fault_check+0x521 sys/uvm/uvm_fault.c:782 #2 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #3 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #4 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #5 recall_trap+0x8 shared rwlock vmmaplk r = 0 (0xfffffd8068aa77e0) #0 witness_lock+0x5b8 stacktrace_save sys/sys/stacktrace.h:37 [inline] #0 witness_lock+0x5b8 sys/kern/subr_witness.c:1151 #1 uvmfault_lookup+0x122 sys/uvm/uvm_fault.c:1785 #2 uvm_fault_check+0x47 sys/uvm/uvm_fault.c:672 #3 uvm_fault+0x112 sys/uvm/uvm_fault.c:600 #4 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #5 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #6 recall_trap+0x8 exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd806adf4118) #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 pmap_enter+0x246 rcr3 machine/cpufunc.h:139 [inline] #3 pmap_enter+0x246 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:430 [inline] #3 pmap_enter+0x246 sys/arch/amd64/amd64/pmap.c:2756 #4 uvm_fault_upper_lookup+0x389 #5 uvm_fault+0x169 sys/uvm/uvm_fault.c:605 #6 upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10222 10359K 10558K 166960K 12746 0 pcb 17 12K 12K 166960K 201 0 rtable 229 8K 9K 166960K 2371 0 pf 42 19K 21K 166960K 225 0 ifaddr 42 7K 8K 166960K 323 0 ifgroup 61 2K 2K 166960K 353 0 sysctl 4 1K 1K 166960K 4 0 counters 68 36K 36K 166960K 224 0 ioctlops 0 0K 4K 166960K 1732 0 iov 0 0K 16K 166960K 161 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1522 96K 96K 166960K 3135 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 20 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 85 0 dirhash 18 3K 3K 166960K 36 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 16 57K 97K 166960K 1858 0 sigio 0 0K 0K 166960K 17 0 proc 70 91K 140K 166960K 2417 0 subproc 104 6K 8K 166960K 949 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 94 0 in_multi 88 6K 7K 166960K 818 0 ether_multi 1 0K 0K 166960K 5 0 mrt 0 0K 0K 166960K 5 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 109 493K 493K 166960K 109 0 exec 0 0K 1K 166960K 1368 0 pfkey data 0 0K 0K 166960K 4 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 225 93K 112K 166960K 15172 0 UVM aobj 59 2K 2K 166960K 61 0 pinsyscall 41 82K 106K 166960K 4609 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 37 0 NDP 14 0K 2K 166960K 236 0 temp 72 6818K 6883K 166960K 46915 0 kqueue 14 22K 28K 166960K 136 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 120 491 0 487 7 6 1 3 0 8 0 rtentry 112 833 0 730 5 1 4 4 0 8 0 unpcb 144 990 0 971 11 9 2 6 0 8 1 syncache 336 3 0 3 2 2 0 1 0 8 0 tcpqe 32 7 0 7 1 1 0 1 0 8 0 tcpcb 808 400 0 396 15 8 7 7 0 8 6 arp 120 149 0 133 1 0 1 1 0 8 0 inpcb 336 1580 0 1571 24 17 7 7 0 8 6 nd6 136 226 0 203 1 0 1 1 0 8 0 pkpcb 40 13 0 13 4 3 1 1 0 8 1 kcovpl 48 73 0 65 1 0 1 1 0 8 0 ppxss 1168 13 0 12 6 5 1 1 0 8 0 pfstscr 40 126 0 125 2 1 1 1 0 8 0 pffrag 232 8 0 6 1 0 1 1 0 482 0 pffrnode 88 8 0 6 1 0 1 1 0 8 0 pffrent 40 181 0 179 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 pfrktable 1344 1 0 0 1 0 1 1 0 8 0 pfstitem 24 130 0 96 1 0 1 1 0 8 0 pfstkey 128 263 0 229 2 0 2 2 0 8 0 pfstate 376 195 0 162 5 0 5 5 0 8 0 pfrule 1344 31 0 23 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 3319 0 2894 36 6 30 30 0 8 0 art_table 32 3321 0 2894 4 0 4 4 0 8 0 art_node 16 830 0 737 1 0 1 1 0 8 0 sysvmsgpl 40 14 0 7 1 0 1 1 0 8 0 semapl 112 83 0 73 1 0 1 1 0 8 0 shmpl 112 58 0 2 2 0 2 2 0 8 0 dirhash 1024 33 0 12 3 0 3 3 0 8 0 dino2pl 256 3223 0 1583 103 0 103 103 0 8 0 ffsino 272 3223 0 1583 110 0 110 110 0 8 0 nchpl 144 4551 0 2751 67 0 67 67 0 8 0 uvmvnodes 80 4748 0 0 97 0 97 97 0 8 0 vnodes 216 4748 0 0 264 0 264 264 0 8 0 namei 1024 23033 0 23033 4 3 1 2 0 8 1 percpumem 16 126 0 78 1 0 1 1 0 8 0 vcpupl 3904 6 0 1 1 0 1 1 0 8 0 vmpool 696 9 0 4 1 0 1 1 0 8 0 kstatmem 264 184 0 156 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 1 0 1 0 8 0 scxspl 216 38741 0 38741 15 14 1 8 1 8 1 plimitpl 152 369 0 351 1 0 1 1 0 8 0 sigapl 424 2051 0 1982 11 2 9 9 0 8 0 futexpl 64 17413 0 17408 3 2 1 1 0 8 0 knotepl 120 417 0 0 12 1 11 11 0 8 0 kqueuepl 216 281 0 270 3 0 3 3 0 8 2 pipepl 320 548 0 521 13 8 5 8 0 8 2 fdescpl 496 2011 0 1981 6 1 5 6 0 8 0 filepl 152 11818 0 11558 40 25 15 18 0 8 3 lockfpl 104 320 0 317 1 0 1 1 0 8 0 lockfspl 48 116 0 113 1 0 1 1 0 8 0 sessionpl 144 90 0 81 1 0 1 1 0 8 0 pgrppl 48 171 0 154 1 0 1 1 0 8 0 ucredpl 104 1541 0 1527 1 0 1 1 0 8 0 zombiepl 144 1982 0 1982 3 2 1 1 0 8 1 processpl 1160 2051 0 1982 7 1 6 6 0 8 0 procpl 648 3371 0 3295 9 1 8 8 0 8 0 srpgc 96 18 0 18 4 4 0 1 0 8 0 sosppl 168 4 0 4 2 2 0 1 0 8 0 sockpl 664 3082 0 3050 45 35 10 19 0 8 6 mcl64k 65536 6 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 235 0 0 29 0 29 29 0 8 0 mtagpl 96 6 0 0 1 0 1 1 0 8 0 mbufpl 256 529 0 0 32 0 32 32 0 8 0 bufpl 280 10028 0 3043 500 0 500 500 0 8 0 anonpl 24 329794 0 326412 82 33 49 61 0 185 11 amapchunkpl 152 47714 0 47273 49 20 29 32 0 158 9 amappl16 200 6467 0 6442 51 49 2 14 0 8 0 amappl15 192 6 0 6 1 1 0 1 0 8 0 amappl14 184 254 0 242 1 0 1 1 0 8 0 amappl13 176 29 0 29 1 1 0 1 0 8 0 amappl12 168 3680 0 3651 4 2 2 3 0 8 0 amappl11 160 65 0 51 1 0 1 1 0 8 0 amappl10 152 11 0 11 1 1 0 1 0 8 0 amappl9 144 176 0 176 1 1 0 1 0 8 0 amappl8 136 46 0 43 1 0 1 1 0 8 0 amappl7 128 239 0 226 1 0 1 1 0 8 0 amappl6 120 808 0 806 1 0 1 1 0 8 0 amappl5 112 399 0 387 1 0 1 1 0 8 0 amappl4 104 518 0 496 1 0 1 1 0 8 0 amappl3 96 8931 0 8826 5 1 4 4 0 8 0 amappl2 88 1522 0 1458 2 0 2 2 0 8 0 amappl1 80 16927 0 16348 18 5 13 15 0 8 0 amappl 88 14284 0 14126 6 1 5 5 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 7 0 7 2 2 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 60 0 2 2 0 2 2 0 8 0 uaddrrnd 24 2020 0 1985 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2020 0 1985 1 0 1 1 0 8 0 vmmpekpl 168 18742 0 18692 3 0 3 3 0 8 0 vmmpepl 168 129385 0 127584 120 34 86 95 0 357 1 vmsppl 440 2019 0 1985 9 4 5 5 0 8 1 rwobjpl 56 43656 0 37919 84 2 82 82 0 8 0 pdppl 4096 4047 0 3975 180 103 77 87 0 8 5 pvpl 32 29343 0 0 236 0 236 236 0 265 0 pmappl 248 2019 0 1985 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 554 0 147 12 0 12 12 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffffffff834b9ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:158 __mp_lock(ffffffff835a4c98) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835a4c98) at __mp_lock+0x1a3 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(ffffffff835a4c98) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835a4c98) at __mp_lock+0x192 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff835a4c98,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x658 sys/kern/sched_bsd.c:460 sleep_finish(0,1) at sleep_finish+0x219 sys/kern/kern_synch.c:416 msleep(ffffffff835dda70,ffffffff8346e2c0,0,ffffffff830df987,0) at msleep+0x13b sys/kern/kern_synch.c:249 softclock_thread(ffff8000ffffeca8) at softclock_thread+0x11f sys/kern/kern_timeout.c:807 end trace frame: 0x0, count: 2 ddb{0}> trace x86_ipi_db(ffffffff834b9ff0) 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 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c kd_curproc sys/dev/kcov.c:589 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x2c sys/dev/kcov.c:158 __mp_lock(ffffffff835a4c98) at __mp_lock+0x1a3 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835a4c98) at __mp_lock+0x1a3 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(ffffffff835a4c98) at __mp_lock+0x192 __mp_lock_spin sys/kern/kern_lock.c:113 [inline] __mp_lock(ffffffff835a4c98) at __mp_lock+0x192 sys/kern/kern_lock.c:144 __mp_acquire_count(ffffffff835a4c98,1) at __mp_acquire_count+0x58 mi_switch() at mi_switch+0x658 sys/kern/sched_bsd.c:460 sleep_finish(0,1) at sleep_finish+0x219 sys/kern/kern_synch.c:416 msleep(ffffffff835dda70,ffffffff8346e2c0,0,ffffffff830df987,0) at msleep+0x13b sys/kern/kern_synch.c:249 softclock_thread(ffff8000ffffeca8) at softclock_thread+0x11f sys/kern/kern_timeout.c:807 end trace frame: 0x0, count: -13 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(ffffffff830de359) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83094712,ffffffff8303a1f8,90,ffffffff8309a677) at __assert+0x29 uvm_pagealloc_pg(fffffd8007efe9e0,fffffd806adf4138,3886d3f000,0) at uvm_pagealloc_pg+0x521 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd806adf4138,3886d3f000,0,3) at uvm_pagealloc+0x23e sys/uvm/uvm_page.c:912 pmap_get_ptp(fffffd806adf4108,710da7e72000) at pmap_get_ptp+0x1c6 pmap_enter(fffffd806adf4108,710da7e72000,67a03000,3,20) at pmap_enter+0x389 uvm_fault_upper_lookup(ffff8000371cfb10,ffff8000371cfb48,ffff8000371cfa10,ffff8000371cfa90) at uvm_fault_upper_lookup+0x389 uvm_fault(fffffd8068aa76f0,710da7e73000,0,1) at uvm_fault+0x169 sys/uvm/uvm_fault.c:605 upageflttrap(ffff8000371cfc90,710da7e735a0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff8000371cfc90) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x710da7e73640, count: 3 ddb{1}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830de359) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff83094712,ffffffff8303a1f8,90,ffffffff8309a677) at __assert+0x29 uvm_pagealloc_pg(fffffd8007efe9e0,fffffd806adf4138,3886d3f000,0) at uvm_pagealloc_pg+0x521 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd806adf4138,3886d3f000,0,3) at uvm_pagealloc+0x23e sys/uvm/uvm_page.c:912 pmap_get_ptp(fffffd806adf4108,710da7e72000) at pmap_get_ptp+0x1c6 pmap_enter(fffffd806adf4108,710da7e72000,67a03000,3,20) at pmap_enter+0x389 uvm_fault_upper_lookup(ffff8000371cfb10,ffff8000371cfb48,ffff8000371cfa10,ffff8000371cfa90) at uvm_fault_upper_lookup+0x389 uvm_fault(fffffd8068aa76f0,710da7e73000,0,1) at uvm_fault+0x169 sys/uvm/uvm_fault.c:605 upageflttrap(ffff8000371cfc90,710da7e735a0) at upageflttrap+0xa9 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff8000371cfc90) at usertrap+0x2d8 sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x710da7e73640, count: -12