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 *388965 27389 0 0x8000000 0 1 syz-executor.1 94877 52677 73 0x19100010 0 0 syslogd db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82958f3a) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8290c161,ffffffff828afac6,90,ffffffff8290f50f) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd8008166060,fffffd8079242128,3ab31b6000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd8079242128,3ab31b6000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd80792420f8,756636dd1000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd80792420f8,756636dd1000,7d297000,1,20) at pmap_enter+0x2c6 sys/arch/amd64/amd64/pmap.c:2722 uvm_fault_upper_lookup(ffff8000329a3ee0,ffff8000329a3f18,ffff8000329a3de0,ffff8000329a3e60) at uvm_fault_upper_lookup+0x2b2 uvm_fault(fffffd806fb29008,756636dd2000,0,1) at uvm_fault+0x129 sys/uvm/uvm_fault.c:605 upageflttrap(ffff8000329a4060,756636dd2680) at upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 usertrap(ffff8000329a4060) at usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x756636dd26a0, 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+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82958f3a) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8290c161,ffffffff828afac6,90,ffffffff8290f50f) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd8008166060,fffffd8079242128,3ab31b6000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd8079242128,3ab31b6000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd80792420f8,756636dd1000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd80792420f8,756636dd1000,7d297000,1,20) at pmap_enter+0x2c6 sys/arch/amd64/amd64/pmap.c:2722 uvm_fault_upper_lookup(ffff8000329a3ee0,ffff8000329a3f18,ffff8000329a3de0,ffff8000329a3e60) at uvm_fault_upper_lookup+0x2b2 uvm_fault(fffffd806fb29008,756636dd2000,0,1) at uvm_fault+0x129 sys/uvm/uvm_fault.c:605 upageflttrap(ffff8000329a4060,756636dd2680) at upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 usertrap(ffff8000329a4060) at usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x756636dd26a0, count: -12 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff8000329a3a00 rbx 0xffff800029ceccdf rdx 0 rcx 0xffff8000ffff5218 rax 0xffff800029cebff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x10a50df9012a05e8 r11 0x9b1abff6d5a4b0ca r12 0xffff800029cecae0 r13 0 r14 0 r15 0x1 rip 0xffffffff816d346c db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff8000329a39f0 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) tid=388965 pid=27389 tcnt=3 stat=onproc flags process=8000000 proc=0 runpri=86, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff8000ffff47d8,0xffff80002a226fa0 process=0xffff800032a2f0f8 user=0xffff80003299f000, vmspace=0xfffffd806fb29008 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 36389 230489 85537 0 2 0x8000000 syz-executor.6 75283 197333 40381 0 2 0x8000000 syz-executor.2 75283 380974 40381 0 3 0xc000000 biowait syz-executor.2 75283 179483 40381 0 3 0xc000080 fsleep syz-executor.2 88239 371359 14428 0 3 0x8000090 nanoslp syz-executor.3 88239 188120 14428 0 3 0xc000090 fsleep syz-executor.3 88239 440873 14428 0 3 0xc000090 netio syz-executor.3 82260 269605 5123 0 3 0x8000080 nanoslp syz-executor.7 82260 357670 5123 0 3 0xc000080 netcon syz-executor.7 82260 68947 5123 0 3 0xc000080 fsleep syz-executor.7 *27389 388965 25889 0 7 0x8000000 syz-executor.1 27389 74001 25889 0 3 0xc000080 netio syz-executor.1 27389 245469 25889 0 3 0xc000080 fsleep syz-executor.1 17008 132551 82095 0 3 0x8000080 nanoslp syz-executor.0 17008 254589 82095 0 3 0xc000080 ttyout syz-executor.0 17008 290889 82095 0 3 0xc000080 fsleep syz-executor.0 38042 352835 12392 0 3 0x8000080 nanoslp syz-executor.5 38042 160531 12392 0 3 0xc000080 sbwait syz-executor.5 38042 62149 12392 0 3 0xc000080 fsleep syz-executor.5 38042 185706 12392 0 3 0xc000080 fsleep syz-executor.5 82095 287547 60077 0 3 0x8000082 nanoslp syz-executor.0 27150 421892 60077 0 3 0x8000082 piperd syz-executor.4 16695 477821 1 0 3 0x18100083 ttyin getty 25889 278084 60077 0 3 0x8000082 nanoslp syz-executor.1 5123 162075 60077 0 3 0x8000082 nanoslp syz-executor.7 85537 452464 60077 0 3 0x8000082 nanoslp syz-executor.6 14428 269223 60077 0 3 0x8000082 nanoslp syz-executor.3 87355 15055 0 0 3 0x14200 acct acct 40381 19176 60077 0 3 0x8000082 nanoslp syz-executor.2 12392 23474 60077 0 3 0x8000082 nanoslp syz-executor.5 7960 324268 0 0 3 0x14200 bored sosplice 73331 292520 51094 0 3 0x18100082 netio arp 51094 234744 1 0 3 0x810008a sigsusp sh 60077 444799 43403 0 3 0x1a000082 wait syz-fuzzer 60077 321208 43403 0 3 0x1e000082 nanoslp syz-fuzzer 60077 289323 43403 0 3 0x1e000082 wait syz-fuzzer 60077 44818 43403 0 3 0x1e000082 thrsleep syz-fuzzer 60077 434557 43403 0 3 0x1e000082 wait syz-fuzzer 60077 52565 43403 0 3 0x1e000082 thrsleep syz-fuzzer 60077 280012 43403 0 3 0x1e000082 wait syz-fuzzer 60077 349071 43403 0 3 0x1e000082 thrsleep syz-fuzzer 60077 224167 43403 0 3 0x1e000082 wait syz-fuzzer 60077 440787 43403 0 3 0x1e000082 thrsleep syz-fuzzer 60077 103099 43403 0 3 0x1e000082 thrsleep syz-fuzzer 60077 125858 43403 0 3 0x1e000082 kqread syz-fuzzer 60077 374870 43403 0 3 0x1e000082 wait syz-fuzzer 60077 507776 43403 0 3 0x1e000082 wait syz-fuzzer 60077 14936 43403 0 3 0x1e000082 thrsleep syz-fuzzer 60077 140967 43403 0 3 0x1e000082 wait syz-fuzzer 43403 517077 12366 0 3 0x810008a sigsusp ksh 12366 437779 3440 0 3 0x1800009a kqread sshd 3440 144855 1 0 3 0x18000088 kqread sshd 52677 94877 20463 73 7 0x19100010 syslogd 20463 254968 1 0 3 0x18100082 sbwait syslogd 93452 179608 1 0 3 0x18100080 kqread resolvd 3448 144377 74750 77 3 0x18100092 kqread dhcpleased 68429 166122 74750 77 3 0x18100092 kqread dhcpleased 74750 325823 1 0 3 0x18000080 kqread dhcpleased 92052 113061 0 0 3 0x14200 bored smr 10715 472488 0 0 2 0x14200 zerothread 18334 515017 0 0 3 0x14200 aiodoned aiodoned 34150 437442 0 0 3 0x14200 syncer update 50678 53682 0 0 3 0x14200 cleaner cleaner 83724 209285 0 0 3 0x14200 reaper reaper 83383 521736 0 0 3 0x14200 pgdaemon pagedaemon 71141 240783 0 0 3 0x14200 bored viomb 94486 274441 0 0 3 0x40014200 acpi0 acpi0 31557 519890 0 0 3 0x40014200 idle1 73866 228108 0 0 3 0x14200 bored softnet3 37297 399 0 0 3 0x14200 bored softnet2 50824 23890 0 0 3 0x14200 bored softnet1 49463 314499 0 0 3 0x14200 bored softnet0 76128 393564 0 0 3 0x14200 bored systqmp 88678 367411 0 0 3 0x14200 bored systq 7396 193213 0 0 3 0x14200 tmoslp softclockmp 21530 495632 0 0 3 0x40014200 tmoslp softclock 89977 108714 0 0 3 0x40014200 idle0 1 68174 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 (0xfffffd8079242108) #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_upper_lookup+0x2b2 #5 uvm_fault+0x129 sys/uvm/uvm_fault.c:605 #6 upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 #7 usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 #8 recall_trap+0x8 Process 36389 (syz-executor.6) thread 0xffff80002a227220 (230489) Process 75283 (syz-executor.2) thread 0xffff80002a2022b0 (380974) Process 27389 (syz-executor.1) thread 0xffff8000ffff5218 (388965) Process 52677 (syslogd) thread 0xffff8000ffffcf70 (94877) ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10227 6453K 6904K 166960K 17285 0 pcb 18 18K 19K 166960K 1020 0 rtable 188 7K 9K 166960K 2181 0 pf 32 9K 10K 166960K 305 0 ifaddr 38 14K 17K 166960K 298 0 ifgroup 55 2K 2K 166960K 511 0 sysctl 4 1K 3K 166960K 15 0 counters 66 36K 37K 166960K 292 0 ioctlops 0 0K 4K 166960K 1773 0 iov 2 4K 18K 166960K 367 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1521 96K 96K 166960K 5584 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 111 0 VM map 2 1K 1K 166960K 2 0 sem 15 1K 1K 166960K 497 0 dirhash 12 2K 2K 166960K 78 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 19 69K 89K 166960K 5423 0 sigio 0 0K 0K 166960K 129 0 proc 58 79K 127K 166960K 2029 0 subproc 117 7K 8K 166960K 757 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 801 0 in_multi 77 5K 7K 166960K 729 0 ether_multi 1 0K 0K 166960K 53 0 mrt 2 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 1674 0 pfkey data 0 0K 0K 166960K 5 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 326 95K 114K 166960K 50052 0 UVM aobj 131 5K 6K 166960K 145 0 pinsyscall 40 80K 100K 166960K 7722 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 2 0K 1K 166960K 581 0 NDP 12 0K 1K 166960K 224 0 temp 75 6820K 7316K 166960K 158176 0 kqueue 13 20K 28K 166960K 687 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 120 692 0 687 3 2 1 3 0 8 0 rtentry 112 705 0 622 4 0 4 4 0 8 0 unpcb 144 5469 0 5450 33 32 1 8 0 8 0 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpqe 32 30 0 30 2 2 0 1 0 8 0 tcpcb 808 2030 0 2022 36 34 2 11 0 8 1 arp 120 129 0 119 1 0 1 1 0 8 0 inpcb 384 6637 0 6624 75 73 2 15 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 136 179 0 157 3 1 2 2 0 8 0 pkpcb 40 17 0 17 9 9 0 1 0 8 0 kcovpl 48 58 0 49 1 0 1 1 0 8 0 ppxss 1168 18 0 18 11 11 0 1 0 8 0 pffrag 232 51 0 50 1 0 1 1 0 482 0 pffrnode 88 50 0 49 1 0 1 1 0 8 0 pffrent 40 514 0 513 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 24 378 0 336 1 0 1 1 0 8 0 pfstkey 128 378 0 336 5 3 2 4 0 8 0 pfstate 376 378 0 336 12 7 5 10 0 8 0 pfrule 1344 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 2548 0 2164 42 13 29 32 0 8 0 art_table 32 2549 0 2164 5 0 5 5 0 8 0 art_node 16 678 0 604 1 0 1 1 0 8 0 sysvmsgpl 40 22 0 9 2 1 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 489 0 476 1 0 1 1 0 8 0 shmpl 112 142 0 14 4 0 4 4 0 8 0 dirhash 1024 61 0 44 3 0 3 3 0 8 0 dino2pl 256 10250 0 8706 97 0 97 97 0 8 0 ffsino 272 10250 0 8706 104 0 104 104 0 8 0 nchpl 144 18125 0 17540 67 34 33 67 0 8 6 uvmvnodes 80 9418 0 0 193 0 193 193 0 8 0 vnodes 216 9418 0 0 524 0 524 524 0 8 0 namei 1024 64356 0 64355 6 5 1 2 0 8 0 percpumem 16 160 0 113 1 0 1 1 0 8 0 vcpupl 3904 16 0 1 2 0 2 2 0 8 0 vmpool 696 23 0 8 2 0 2 2 0 8 0 kstatmem 264 250 0 226 3 1 2 3 0 8 0 scsiplug 72 16 0 16 8 7 1 1 0 8 1 scxspl 216 103107 0 103106 26 25 1 8 1 8 0 plimitpl 152 1039 0 1023 1 0 1 1 0 8 0 sigapl 424 5658 0 5608 9 2 7 9 0 8 0 futexpl 64 76602 0 76595 7 6 1 1 0 8 0 knotepl 120 914 0 0 20 1 19 19 0 8 0 kqueuepl 216 1718 0 1708 18 17 1 5 0 8 0 pipepl 320 1127 0 1096 21 18 3 8 0 8 0 fdescpl 496 5617 0 5587 6 1 5 5 0 8 0 filepl 152 40643 0 40364 54 41 13 20 0 8 0 lockfpl 104 1312 0 1309 1 0 1 1 0 8 0 lockfspl 48 522 0 519 1 0 1 1 0 8 0 sessionpl 144 73 0 56 1 0 1 1 0 8 0 pgrppl 48 133 0 116 1 0 1 1 0 8 0 ucredpl 104 6846 0 6833 1 0 1 1 0 8 0 zombiepl 144 5608 0 5608 1 0 1 1 0 8 1 processpl 1136 5658 0 5608 6 1 5 6 0 8 0 procpl 656 12474 0 12396 12 5 7 9 0 8 0 srpgc 96 42 0 42 11 11 0 1 0 8 0 sosppl 168 71 0 71 12 12 0 1 0 8 0 sockpl 664 12877 0 12840 109 105 4 20 0 8 0 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 478 0 0 39 7 32 39 0 8 0 mtagpl 96 63 0 0 1 0 1 1 0 8 0 mbufpl 256 1441 0 0 76 0 76 76 0 8 0 bufpl 280 19026 0 9258 698 0 698 698 0 8 0 anonpl 24 923550 0 915690 147 74 73 104 0 186 0 amapchunkpl 152 162856 0 162090 89 48 41 43 0 158 4 amappl16 200 25557 0 25345 101 85 16 41 0 8 0 amappl15 192 11 0 11 3 3 0 1 0 8 0 amappl14 184 342 0 329 2 1 1 2 0 8 0 amappl13 176 17 0 17 2 2 0 1 0 8 0 amappl12 168 6934 0 6900 2 0 2 2 0 8 0 amappl11 160 79 0 68 1 0 1 1 0 8 0 amappl10 152 127 0 117 1 0 1 1 0 8 0 amappl9 144 175 0 175 6 6 0 1 0 8 0 amappl8 136 330 0 292 2 0 2 2 0 8 0 amappl7 128 58 0 42 1 0 1 1 0 8 0 amappl6 120 898 0 881 2 1 1 2 0 8 0 amappl5 112 344 0 332 1 0 1 1 0 8 0 amappl4 104 874 0 835 2 0 2 2 0 8 0 amappl3 96 30631 0 30532 3 0 3 3 0 8 0 amappl2 88 6189 0 6110 4 2 2 4 0 8 0 amappl1 80 28348 0 27822 22 10 12 22 0 8 0 amappl 88 48788 0 48560 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 72 144 0 14 3 0 3 3 0 8 0 uaddrrnd 24 5640 0 5595 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5640 0 5595 1 0 1 1 0 8 0 vmmpekpl 168 44429 0 44359 5 1 4 4 0 8 0 vmmpepl 168 364264 0 362156 200 100 100 117 0 357 0 vmsppl 440 5639 0 5595 7 1 6 6 0 8 0 rwobjpl 56 103922 0 93115 166 13 153 153 0 8 0 pdppl 4096 11287 0 11205 261 175 86 89 0 8 4 pvpl 32 48532 0 0 392 0 392 392 0 265 0 pmappl 248 5639 0 5595 5 2 3 4 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 685 0 248 13 0 13 13 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82d00ff0) 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(ffffffff82e66670) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82e66670) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82e66670,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x491 sys/kern/sched_bsd.c:470 sleep_finish(0,1) at sleep_finish+0x19a sys/kern/kern_synch.c:417 biowait(fffffd806f786698) at biowait+0x91 sys/kern/vfs_bio.c:1254 bwrite(fffffd806f786698) at bwrite+0x1fe sys/kern/vfs_bio.c:766 ffs_update(fffffd806e7a9008,1) at ffs_update+0x27f sys/ufs/ffs/ffs_inode.c:111 VOP_FSYNC(fffffd806e5aa998,fffffd807f7d7750,1,ffff8000ffffcf70) at VOP_FSYNC+0xd2 sys/kern/vfs_vops.c:311 sys_fsync(ffff8000ffffcf70,ffff80002a1da4e0,ffff80002a1da430) at sys_fsync+0x105 sys/kern/vfs_syscalls.c:2904 syscall(ffff80002a1da4e0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002a1da4e0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79daff729f20, count: 1 ddb{0}> trace x86_ipi_db(ffffffff82d00ff0) 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(ffffffff82e66670) at __mp_lock+0x122 __mp_lock_spin sys/kern/kern_lock.c:116 [inline] __mp_lock(ffffffff82e66670) at __mp_lock+0x122 sys/kern/kern_lock.c:147 __mp_acquire_count(ffffffff82e66670,1) at __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 mi_switch() at mi_switch+0x491 sys/kern/sched_bsd.c:470 sleep_finish(0,1) at sleep_finish+0x19a sys/kern/kern_synch.c:417 biowait(fffffd806f786698) at biowait+0x91 sys/kern/vfs_bio.c:1254 bwrite(fffffd806f786698) at bwrite+0x1fe sys/kern/vfs_bio.c:766 ffs_update(fffffd806e7a9008,1) at ffs_update+0x27f sys/ufs/ffs/ffs_inode.c:111 VOP_FSYNC(fffffd806e5aa998,fffffd807f7d7750,1,ffff8000ffffcf70) at VOP_FSYNC+0xd2 sys/kern/vfs_vops.c:311 sys_fsync(ffff8000ffffcf70,ffff80002a1da4e0,ffff80002a1da430) at sys_fsync+0x105 sys/kern/vfs_syscalls.c:2904 syscall(ffff80002a1da4e0) at syscall+0x854 mi_syscall sys/sys/syscall_mi.h:180 [inline] syscall(ffff80002a1da4e0) at syscall+0x854 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x79daff729f20, count: -14 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(ffffffff82958f3a) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8290c161,ffffffff828afac6,90,ffffffff8290f50f) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd8008166060,fffffd8079242128,3ab31b6000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd8079242128,3ab31b6000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd80792420f8,756636dd1000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd80792420f8,756636dd1000,7d297000,1,20) at pmap_enter+0x2c6 sys/arch/amd64/amd64/pmap.c:2722 uvm_fault_upper_lookup(ffff8000329a3ee0,ffff8000329a3f18,ffff8000329a3de0,ffff8000329a3e60) at uvm_fault_upper_lookup+0x2b2 uvm_fault(fffffd806fb29008,756636dd2000,0,1) at uvm_fault+0x129 sys/uvm/uvm_fault.c:605 upageflttrap(ffff8000329a4060,756636dd2680) at upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 usertrap(ffff8000329a4060) at usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x756636dd26a0, count: 3 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff82958f3a) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff8290c161,ffffffff828afac6,90,ffffffff8290f50f) at __assert+0x29 sys/kern/subr_prf.c:157 uvm_pagealloc_pg(fffffd8008166060,fffffd8079242128,3ab31b6000,0) at uvm_pagealloc_pg+0x3e9 sys/uvm/uvm_page.c:695 uvm_pagealloc(fffffd8079242128,3ab31b6000,0,3) at uvm_pagealloc+0x1ed sys/uvm/uvm_page.c:917 pmap_get_ptp(fffffd80792420f8,756636dd1000) at pmap_get_ptp+0x18d sys/arch/amd64/amd64/pmap.c:1215 pmap_enter(fffffd80792420f8,756636dd1000,7d297000,1,20) at pmap_enter+0x2c6 sys/arch/amd64/amd64/pmap.c:2722 uvm_fault_upper_lookup(ffff8000329a3ee0,ffff8000329a3f18,ffff8000329a3de0,ffff8000329a3e60) at uvm_fault_upper_lookup+0x2b2 uvm_fault(fffffd806fb29008,756636dd2000,0,1) at uvm_fault+0x129 sys/uvm/uvm_fault.c:605 upageflttrap(ffff8000329a4060,756636dd2680) at upageflttrap+0x8e sys/arch/amd64/amd64/trap.c:188 usertrap(ffff8000329a4060) at usertrap+0x22a sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0x756636dd26a0, count: -12