login: uvm_fault(0xffffffff82969580, 0x0, 0, 2) -> e kernel: page fault trap, code=0 Stopped at km_free+0x118: movq $0,0(%rax) TID PID UID PRFLAGS PFLAGS CPU COMMAND *267239 47467 0 0x14000 0x200 0K systqmp km_free(0,1000,ffffffff826ee900,ffffffff826ee918) at km_free+0x118 sys/uvm/uvm_km.c:973 pool_p_free(ffffffff828ebcd0,fffffd8067763f90) at pool_p_free+0x14b sys/kern/subr_pool.c:1014 pool_gc_pages(0) at pool_gc_pages+0x255 sys/kern/subr_pool.c:1585 taskq_thread(ffffffff82789130) at taskq_thread+0xe5 sys/kern/kern_task.c:449 end trace frame: 0x0, count: 11 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: uvm_fault(0xffffffff82969580, 0x0, 0, 2) -> e ddb{0}> trace km_free(0,1000,ffffffff826ee900,ffffffff826ee918) at km_free+0x118 sys/uvm/uvm_km.c:973 pool_p_free(ffffffff828ebcd0,fffffd8067763f90) at pool_p_free+0x14b sys/kern/subr_pool.c:1014 pool_gc_pages(0) at pool_gc_pages+0x255 sys/kern/subr_pool.c:1585 taskq_thread(ffffffff82789130) at taskq_thread+0xe5 sys/kern/kern_task.c:449 end trace frame: 0x0, count: -4 ddb{0}> show registers rdi 0x1000 __ALIGN_SIZE rsi 0x28000000 rbp 0xffff800021161380 rbx 0x28000000000 rdx 0 rcx 0xffffffff826ee918 kp_dirty rax 0 r8 0 r9 0 r10 0 r11 0x73f3cd23db28a321 r12 0 r13 0xffffffff826ee900 kv_page r14 0x1000 __ALIGN_SIZE r15 0x1000 __ALIGN_SIZE rip 0xffffffff8212e818 km_free+0x118 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021161300 ss 0x10 km_free+0x118: movq $0,0(%rax) ddb{0}> show proc PROC (systqmp) pid=267239 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800021149260,0xffff800021148550 process=0xffff8000ffffd8f0 user=0xffff80002115c000, vmspace=0xffffffff82969580 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 4430 230146 44687 0 3 0x82 piperd syz-executor.2 93724 402241 1 0 3 0x100083 ttyin getty 46915 179530 44687 0 3 0x82 piperd syz-executor.1 86543 231222 0 0 3 0x14280 nfsidl nfsio 42867 210215 0 0 3 0x14280 nfsidl nfsio 18835 480336 0 0 3 0x14280 nfsidl nfsio 19586 30003 0 0 3 0x14280 nfsidl nfsio 70209 235215 0 0 3 0x14280 nfsidl nfsio 63933 398591 0 0 3 0x14280 nfsidl nfsio 95205 477906 0 0 3 0x14280 nfsidl nfsio 76710 90543 0 0 3 0x14280 nfsidl nfsio 32239 416887 0 0 3 0x14280 nfsidl nfsio 2655 8313 0 0 3 0x14280 nfsidl nfsio 45672 278606 0 0 3 0x14280 nfsidl nfsio 68193 389434 0 0 3 0x14280 nfsidl nfsio 82958 31385 0 0 3 0x14280 nfsidl nfsio 41540 518603 0 0 3 0x14280 nfsidl nfsio 53323 432856 0 0 3 0x14280 nfsidl nfsio 32463 456038 0 0 3 0x14280 nfsidl nfsio 58701 56233 0 0 3 0x14280 nfsidl nfsio 27509 273901 0 0 3 0x14280 nfsidl nfsio 17751 366484 0 0 3 0x14280 nfsidl nfsio 26574 457733 0 0 3 0x14280 nfsidl nfsio 92704 365999 44687 0 3 0x82 piperd syz-executor.0 53056 236239 0 0 3 0x14200 acct acct 57210 264474 0 0 3 0x14200 bored sosplice 44687 91852 45850 0 3 0x82 thrsleep syz-fuzzer 44687 362957 45850 0 3 0x4000082 thrsleep syz-fuzzer 44687 432790 45850 0 3 0x4000082 thrsleep syz-fuzzer 44687 132836 45850 0 3 0x4000082 kqread syz-fuzzer 44687 24955 45850 0 3 0x4000082 thrsleep syz-fuzzer 44687 348153 45850 0 3 0x4000082 thrsleep syz-fuzzer 44687 73967 45850 0 3 0x4000082 thrsleep syz-fuzzer 44687 349660 45850 0 3 0x4000082 thrsleep syz-fuzzer 44687 294587 45850 0 3 0x4000082 thrsleep syz-fuzzer 45850 322724 31039 0 3 0x10008a sigsusp ksh 31039 63911 82924 0 3 0x9a poll sshd 82924 496869 1 0 3 0x88 poll sshd 79983 78129 32476 74 3 0x100092 bpf pflogd 32476 331441 1 0 3 0x80 netio pflogd 90080 158792 83469 73 3 0x100090 kqread syslogd 83469 448749 1 0 3 0x100082 netio syslogd 27040 375659 1 0 3 0x100080 kqread resolvd 67460 421015 84678 77 3 0x100092 kqread dhcpleased 21765 313937 84678 77 3 0x100092 kqread dhcpleased 84678 321704 1 0 3 0x80 kqread dhcpleased 43496 395746 0 0 3 0x14200 bored smr 99478 99744 0 0 3 0x14200 pgzero zerothread 84296 368355 0 0 3 0x14200 aiodoned aiodoned 81508 74078 0 0 3 0x14200 syncer update 77006 202114 0 0 3 0x14200 cleaner cleaner 12574 351380 0 0 3 0x14200 reaper reaper 90335 428813 0 0 3 0x14200 pgdaemon pagedaemon 6501 42457 0 0 3 0x14200 bored viomb 65624 444343 0 0 3 0x40014200 acpi0 acpi0 71447 523564 0 0 7 0x40014200 idle1 32134 425359 0 0 3 0x14200 bored softnet *47467 267239 0 0 7 0x14200 systqmp 53080 10833 0 0 2 0x14200 systq 14331 443295 0 0 3 0x40014200 bored softclock 84251 396283 0 0 3 0x40014200 idle0 1 402371 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 47467 (systqmp) thread 0xffff8000211487e0 (267239) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff829c30a0) #0 witness_lock+0x44d #1 kpageflttrap+0x23d sys/arch/amd64/amd64/trap.c:274 #2 kerntrap+0xef sys/arch/amd64/amd64/trap.c:318 #3 alltraps_kern_meltdown+0x7b #4 km_free+0x118 sys/uvm/uvm_km.c:973 #5 pool_p_free+0x14b sys/kern/subr_pool.c:1014 #6 pool_gc_pages+0x255 sys/kern/subr_pool.c:1585 #7 taskq_thread+0xe5 sys/kern/kern_task.c:449 #8 proc_trampoline+0x1c shared rwlock pools r = 0 (0xffffffff827c1b70) #0 witness_lock+0x44d #1 pool_gc_pages+0x21 sys/kern/subr_pool.c:1562 #2 taskq_thread+0xe5 sys/kern/kern_task.c:449 #3 proc_trampoline+0x1c shared rwlock systqmp r = 0 (0xffffffff827891a0) #0 witness_lock+0x44d #1 taskq_thread+0xca sys/kern/kern_task.c:445 #2 proc_trampoline+0x1c ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10196 6480K 14674K 78643K 64795 0 pcb 13 16K 20K 78643K 1877 0 rtable 162 15K 19K 78643K 4144 0 ifaddr 73 18K 21K 78643K 1186 0 sysctl 3 1K 1K 78643K 3 0 counters 46 34K 34K 78643K 272 0 ioctlops 0 0K 8K 78643K 7136 0 iov 0 0K 16K 78643K 999 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 5 0 vnodes 1404 88K 89K 78643K 19362 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 134 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 1789 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12598 0 file desc 5 13K 49K 78643K 13471 0 sigio 0 0K 0K 78643K 770 0 proc 70 87K 124K 78643K 2226 0 subproc 39 2K 3K 78643K 671 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 712 0 in_multi 40 2K 3K 78643K 1071 0 ether_multi 1 0K 0K 78643K 174 0 mrt 1 0K 0K 78643K 64 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 247 1102K 1102K 78643K 247 0 exec 0 0K 2K 78643K 2762 0 pfkey data 0 0K 0K 78643K 10 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 399 723K 732K 78643K 167533 0 UVM aobj 131 4K 4K 78643K 151 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 704 0 NDP 8 0K 1K 78643K 254 0 temp 106 4225K 8322K 78643K 112745 0 kqueue 10 14K 20K 78643K 505 0 SYN cache 2 8K 16K 78643K 3 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 1079 0 1076 16 15 1 3 0 8 0 rtentry 112 792 0 746 2 0 2 2 0 8 0 unpcb 136 9365 0 9350 92 91 1 6 0 8 0 syncache 296 85 0 85 21 20 1 1 0 8 1 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 108 0 108 8 8 0 1 0 8 0 tcpcb 736 4269 0 4265 161 158 3 13 0 8 2 arp 120 117 0 108 1 0 1 1 0 8 0 inpcb 304 11750 0 11740 183 176 7 16 0 8 5 rttmr 72 21 0 21 7 7 0 1 0 8 0 nd6 48 195 0 188 1 0 1 1 0 8 0 pkpcb 40 21 0 21 5 5 0 1 0 8 0 kcovpl 48 51 0 48 1 0 1 1 0 8 0 ppxss 1248 15 0 15 6 6 0 1 0 8 0 pfstscr 40 27 0 27 7 6 1 1 0 8 1 pffrag 232 74 0 72 8 7 1 1 0 482 0 pffrnode 88 74 0 72 8 7 1 1 0 8 0 pffrent 40 839 0 837 9 8 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 535 0 513 9 7 2 3 0 8 0 pftag 88 77 0 75 2 1 1 1 0 8 0 pfqueue 264 8 0 4 2 1 1 1 0 8 0 pfstitem 24 31 0 29 1 0 1 1 0 8 0 pfstkey 112 217 0 215 1 0 1 1 0 8 0 pfstate 320 122 0 120 2 1 1 2 0 8 0 pfsrctr 152 22 0 22 4 4 0 1 0 8 0 pfrule 1360 2785 0 2671 15 5 10 10 0 8 0 art_heap8 4096 7 0 6 3 2 1 3 0 8 0 art_heap4 256 3419 0 3206 33 14 19 21 0 8 1 art_table 32 3426 0 3212 6 3 3 3 0 8 0 art_node 16 788 0 749 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 2 1 0 1 1 0 8 0 semapl 112 1786 0 1776 1 0 1 1 0 8 0 shmpl 112 148 0 20 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 17860 0 16415 91 0 91 91 0 8 0 ffsino 272 17860 0 16415 97 0 97 97 0 8 0 nchpl 144 34824 0 33239 61 0 61 61 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 224 5926 0 0 349 0 349 349 0 8 0 namei 1024 137511 0 137511 6 5 1 1 0 8 1 percpumem 16 148 0 113 1 0 1 1 0 8 0 vcpupl 2048 254 0 2 32 0 32 32 0 8 0 vmpool 560 308 0 56 20 2 18 18 0 8 0 pfiaddrpl 120 302 0 264 5 3 2 2 0 8 0 scsiplug 72 6 0 6 2 2 0 1 0 8 0 scxspl 216 98303 0 98303 25 24 1 8 0 8 1 plimitpl 152 1235 0 1225 1 0 1 1 0 8 0 sigapl 424 13635 0 13581 8 1 7 7 0 8 0 futexpl 64 128900 0 128900 5 4 1 1 0 8 1 knotepl 112 133 0 0 3 0 3 3 0 8 0 kqueuepl 216 4128 0 4122 54 51 3 6 0 8 2 pipepl 336 2650 0 2637 78 76 2 7 0 8 0 fdescpl 496 13558 0 13540 5 2 3 4 0 8 0 filepl 152 100854 0 100724 181 170 11 18 0 8 5 lockfpl 104 4903 0 4901 14 13 1 2 0 8 0 lockfspl 48 1112 0 1110 1 0 1 1 0 8 0 sessionpl 144 71 0 59 1 0 1 1 0 8 0 pgrppl 48 111 0 99 1 0 1 1 0 8 0 ucredpl 96 9563 0 9548 1 0 1 1 0 8 0 zombiepl 144 13581 0 13581 2 1 1 1 0 8 1 processpl 1064 13635 0 13581 6 2 4 5 0 8 0 procpl 672 35878 0 35816 20 13 7 8 0 8 1 srpgc 96 56 0 56 10 9 1 1 0 8 1 sosppl 168 90 0 90 19 19 0 1 0 8 0 sockpl 480 22240 0 22208 512 499 13 29 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 13 0 0 2 0 2 2 0 8 0 mcl12k 12288 20 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 18 0 0 3 0 3 3 0 8 0 mcl4k 4096 25 0 0 3 0 3 3 0 8 0 mcl2k2 2112 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 607 0 0 28 1 27 28 0 8 0 mtagpl 96 1228 0 0 20 0 20 20 0 8 0 mbufpl 256 7275 0 0 433 0 433 433 0 8 0 bufpl 288 21864 0 15519 454 0 454 454 0 8 0 anonpl 24 3833757 0 3813510 397 237 160 173 0 186 9 amapchunkpl 152 431707 0 431022 132 99 33 47 0 158 0 amappl16 200 40318 0 39315 196 133 63 67 0 8 8 amappl15 192 2308 0 2308 5 4 1 1 0 8 1 amappl14 184 3023 0 3021 1 0 1 1 0 8 0 amappl13 176 1516 0 1512 1 0 1 1 0 8 0 amappl12 168 1402 0 1399 1 0 1 1 0 8 0 amappl11 160 1694 0 1680 1 0 1 1 0 8 0 amappl10 152 967 0 957 1 0 1 1 0 8 0 amappl9 144 2027 0 2025 1 0 1 1 0 8 0 amappl8 136 2742 0 2657 4 0 4 4 0 8 0 amappl7 128 1711 0 1698 1 0 1 1 0 8 0 amappl6 120 2016 0 1994 1 0 1 1 0 8 0 amappl5 112 10972 0 10946 1 0 1 1 0 8 0 amappl4 104 5515 0 5488 1 0 1 1 0 8 0 amappl3 96 2870 0 2846 1 0 1 1 0 8 0 amappl2 88 2887 0 2834 3 1 2 2 0 8 0 amappl1 80 247202 0 246760 16 5 11 13 0 8 0 amappl 88 166082 0 165854 7 0 7 7 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 72 150 0 20 3 0 3 3 0 8 0 uaddrrnd 24 13866 0 13596 2 0 2 2 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 13866 0 13596 2 0 2 2 0 8 0 vmmpekpl 168 89879 0 89819 5 1 4 4 0 8 0 vmmpepl 168 1246953 0 1244049 511 341 170 179 0 357 26 vmsppl 368 13865 0 13596 25 0 25 25 0 8 0 rwobjpl 56 301702 0 293731 142 24 118 118 0 8 4 pdppl 4096 27740 0 27444 406 100 306 306 0 8 10 pvpl 32 6297170 0 6279432 514 314 200 243 0 265 1 pmappl 248 13865 0 13596 18 0 18 18 0 8 0 extentpl 40 57 0 38 1 0 1 1 0 8 0 phpool 112 1879 0 363 44 0 44 44 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace km_free(0,1000,ffffffff826ee900,ffffffff826ee918) at km_free+0x118 sys/uvm/uvm_km.c:973 pool_p_free(ffffffff828ebcd0,fffffd8067763f90) at pool_p_free+0x14b sys/kern/subr_pool.c:1014 pool_gc_pages(0) at pool_gc_pages+0x255 sys/kern/subr_pool.c:1585 taskq_thread(ffffffff82789130) at taskq_thread+0xe5 sys/kern/kern_task.c:449 end trace frame: 0x0, count: -4 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a 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+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: 10 ddb{1}> trace x86_ipi_db(ffff800020d38ff0) at x86_ipi_db+0x1a 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+0x23 acpicpu_idle() at acpicpu_idle+0x312 sys/dev/acpi/acpicpu.c:1206 sched_idle(ffff800020d38ff0) at sched_idle+0x417 sys/kern/kern_sched.c:178 end trace frame: 0x0, count: -5