uvm_fault(0xffffffff82a9b000, 0x0, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pool_gc_pages+0x1a5: movq %rax,0(%rcx) TID PID UID PRFLAGS PFLAGS CPU COMMAND *404734 62928 0 0x14000 0x200 0 systqmp pool_gc_pages(0) at pool_gc_pages+0x1a5 pool_p_remove sys/kern/subr_pool.c:1051 [inline] pool_gc_pages(0) at pool_gc_pages+0x1a5 sys/kern/subr_pool.c:1578 taskq_thread(ffffffff82981370) at taskq_thread+0x9b sys/kern/kern_task.c:449 end trace frame: 0x0, count: 13 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff82a9b000, 0x0, 0, 2) -> e ddb> trace pool_gc_pages(0) at pool_gc_pages+0x1a5 pool_p_remove sys/kern/subr_pool.c:1051 [inline] pool_gc_pages(0) at pool_gc_pages+0x1a5 sys/kern/subr_pool.c:1578 taskq_thread(ffffffff82981370) at taskq_thread+0x9b sys/kern/kern_task.c:449 end trace frame: 0x0, count: -2 ddb> show registers rdi 0 rsi 0xf90 rbp 0xffff800021590a50 rbx 0xf90 rdx 0 rcx 0 rax 0 r8 0 r9 0 r10 0x4ef49bb87fc33ff0 r11 0xc57c83dcbfeb28c5 r12 0x1dcd65000 r13 0xfffffd807635bf90 r14 0 r15 0xffffffff829e64b0 uvm_anon_pool rip 0xffffffff8123af85 pool_gc_pages+0x1a5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021590a10 ss 0 pool_gc_pages+0x1a5: movq %rax,0(%rcx) ddb> show proc PROC (systqmp) pid=404734 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffed20,0xffff8000ffffe550 process=0xffff8000ffffc3e8 user=0xffff80002158b000, vmspace=0xffffffff82a9b000 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 76076 509276 40516 0 2 0 syz-executor.2 59795 334797 17737 0 2 0 syz-executor.7 59795 117262 17737 0 3 0x4000080 fsleep syz-executor.7 59795 19688 17737 0 3 0x4000080 fsleep syz-executor.7 83546 308224 94860 0 2 0x81000 syz-executor.5 83546 431811 94860 0 3 0x4003000 suspend syz-executor.5 39675 454873 83625 0 3 0x80 nanoslp syz-executor.3 39675 280007 83625 0 3 0x4000080 netio syz-executor.3 39675 10415 83625 0 3 0x4000080 fsleep syz-executor.3 53211 190282 79013 0 2 0 syz-executor.0 53211 504676 79013 0 3 0x4000080 fsleep syz-executor.0 15384 157472 31552 60928 2 0x4081010 syz-executor.1 15384 381042 31552 60928 3 0x4003010 suspend syz-executor.1 79013 90990 15052 0 2 0x482 syz-executor.0 54223 33753 15052 0 3 0x82 piperd syz-executor.6 83625 196876 15052 0 3 0x82 nanoslp syz-executor.3 92536 68768 0 0 3 0x14200 bored sosplice 40516 445792 15052 0 3 0x82 nanoslp syz-executor.2 89010 515691 1 0 3 0x100083 ttyin getty 31552 407053 15052 0 3 0x82 nanoslp syz-executor.1 94860 450719 15052 0 3 0x82 nanoslp syz-executor.5 17737 152640 15052 0 2 0x482 syz-executor.7 10677 280266 15052 0 2 0x482 syz-executor.4 15052 129343 42800 0 3 0x82 thrsleep syz-fuzzer 15052 9592 42800 0 3 0x4000082 thrsleep syz-fuzzer 15052 127146 42800 0 3 0x4000082 thrsleep syz-fuzzer 15052 438843 42800 0 3 0x4000082 thrsleep syz-fuzzer 15052 275686 42800 0 3 0x4000082 kqread syz-fuzzer 15052 42137 42800 0 3 0x4000082 thrsleep syz-fuzzer 15052 310730 42800 0 3 0x4000082 thrsleep syz-fuzzer 15052 447184 42800 0 3 0x4000082 thrsleep syz-fuzzer 15052 309945 42800 0 3 0x4000082 thrsleep syz-fuzzer 42800 428675 61696 0 3 0x10008a sigsusp ksh 61696 437336 31338 0 3 0x9a kqread sshd 31338 130683 1 0 3 0x88 kqread sshd 17197 70205 69238 73 3 0x1100090 kqread syslogd 69238 130346 1 0 3 0x100082 netio syslogd 81144 440017 1 0 3 0x100080 kqread resolvd 55519 278541 25353 77 3 0x100092 kqread dhcpleased 82565 473721 25353 77 3 0x100092 kqread dhcpleased 25353 470438 1 0 3 0x80 kqread dhcpleased 95028 441700 0 0 3 0x14200 bored smr 34504 212908 0 0 2 0x14200 zerothread 92558 281598 0 0 3 0x14200 aiodoned aiodoned 25127 127834 0 0 3 0x14200 syncer update 37590 316170 0 0 3 0x14200 cleaner cleaner 36729 415014 0 0 3 0x14200 reaper reaper 29523 296882 0 0 3 0x14200 pgdaemon pagedaemon 60983 515668 0 0 3 0x14200 bored viomb 52573 146756 0 0 3 0x40014200 acpi0 acpi0 11703 515047 0 0 3 0x14200 bored softnet 29677 516222 0 0 3 0x14200 bored softnet 34082 156284 0 0 3 0x14200 bored softnet 20575 236233 0 0 3 0x14200 bored softnet *62928 404734 0 0 7 0x14200 systqmp 27628 35940 0 0 3 0x14200 bored systq 62002 265340 0 0 3 0x40014200 bored softclock 89909 128768 0 0 3 0x40014200 idle0 1 235800 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10180 6402K 6984K 78643K 15388 0 pcb 13 19K 22K 78643K 298 0 rtable 222 7K 9K 78643K 733 0 ifaddr 76 16K 17K 78643K 207 0 sysctl 3 1K 2K 78643K 6 0 counters 26 17K 17K 78643K 43 0 ioctlops 0 0K 4K 78643K 2247 0 iov 0 0K 8K 78643K 238 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1333 83K 84K 78643K 2597 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 22 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 87 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 16 57K 85K 78643K 1819 0 sigio 0 0K 0K 78643K 7 0 proc 60 59K 91K 78643K 794 0 subproc 104 6K 6K 78643K 234 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 29 0 in_multi 92 6K 6K 78643K 246 0 ether_multi 1 0K 0K 78643K 1 0 mrt 0 0K 0K 78643K 5 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 157 705K 705K 78643K 157 0 exec 0 0K 2K 78643K 1102 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 305 391K 408K 78643K 10967 0 UVM aobj 99 3K 3K 78643K 108 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 45 0 NDP 10 0K 1K 78643K 68 0 temp 146 4778K 4842K 78643K 20254 0 kqueue 12 18K 24K 78643K 198 0 SYN cache 2 16K 16K 78643K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 103 0 100 1 0 1 1 0 8 0 rtentry 112 231 0 131 4 0 4 4 0 8 0 unpcb 136 1122 0 1100 12 10 2 6 0 8 0 syncache 296 18 0 18 3 3 0 1 0 8 0 tcpqe 32 392 0 392 3 3 0 1 0 8 0 tcpcb 736 837 0 817 41 39 2 37 0 8 0 arp 88 39 0 23 1 0 1 1 0 8 0 inpcb 312 2086 0 2077 43 37 6 21 0 8 5 nd6 48 59 0 38 1 0 1 1 0 8 0 kcovpl 48 18 0 10 1 0 1 1 0 8 0 ppxss 1152 6 0 6 2 2 0 1 0 8 0 pfrktable 1344 17 0 15 1 0 1 1 0 8 0 pftag 88 4 0 2 1 0 1 1 0 8 0 pfqueue 264 3 0 3 1 1 0 1 0 8 0 pfrule 1360 21 0 14 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 920 0 509 31 5 26 29 0 8 0 art_table 32 921 0 509 4 0 4 4 0 8 0 art_node 16 230 0 140 1 0 1 1 0 8 0 sysvmsgpl 40 86 0 77 1 0 1 1 0 8 0 semapl 112 85 0 75 1 0 1 1 0 8 0 shmpl 112 105 0 9 3 0 3 3 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 3711 0 2276 90 0 90 90 0 8 0 ffsino 240 3711 0 2276 85 0 85 85 0 8 0 nchpl 144 6058 0 4418 63 0 63 63 0 8 0 uvmvnodes 80 4794 0 0 98 0 98 98 0 8 0 vnodes 224 4794 0 0 282 0 282 282 0 8 0 namei 1024 24398 0 24398 3 2 1 2 0 8 1 vcpupl 1984 98 0 4 12 0 12 12 0 8 0 vmpool 528 101 0 7 7 0 7 7 0 8 0 pfiaddrpl 120 8 0 4 1 0 1 1 0 8 0 kstatmem 264 54 0 34 2 0 2 2 0 8 0 scxspl 216 21740 0 21740 11 10 1 8 0 8 1 plimitpl 152 829 0 814 1 0 1 1 0 8 0 sigapl 424 2089 0 2044 6 0 6 6 0 8 0 futexpl 64 16539 0 16535 3 2 1 1 0 8 0 knotepl 120 33824 0 33744 11 4 7 7 0 8 3 kqueuepl 184 593 0 585 11 10 1 4 0 8 0 pipepl 304 489 0 461 12 9 3 8 0 8 0 fdescpl 432 2072 0 2045 4 0 4 4 0 8 0 filepl 120 15136 0 14887 29 18 11 16 0 8 2 lockfpl 104 617 0 615 3 2 1 2 0 8 0 lockfspl 48 135 0 133 1 0 1 1 0 8 0 sessionpl 144 34 0 18 1 0 1 1 0 8 0 pgrppl 48 42 0 26 1 0 1 1 0 8 0 ucredpl 96 1773 0 1761 1 0 1 1 0 8 0 zombiepl 144 2047 0 2044 1 0 1 1 0 8 0 processpl 1000 2089 0 2044 8 2 6 7 0 8 0 procpl 672 4527 0 4466 9 2 7 7 0 8 0 sosppl 168 18 0 18 4 4 0 1 0 8 0 sockpl 448 3317 0 3279 80 68 12 32 0 8 7 mcl64k 65536 86 0 86 4 4 0 1 0 8 0 mcl16k 16384 19 0 19 3 3 0 1 0 8 0 mcl12k 12288 61 0 61 3 2 1 1 0 8 1 mcl9k 9216 20 0 20 4 4 0 1 0 8 0 mcl8k 8192 96 0 96 4 3 1 1 0 8 1 mcl4k 4096 140 0 140 4 3 1 1 0 8 1 mcl2k2 2112 8 0 8 5 4 1 1 0 8 1 mcl2k 2048 72073 0 71990 30 18 12 22 0 8 0 mtagpl 96 569 0 309 11 4 7 10 0 8 0 mbufpl 256 126907 0 126407 44 8 36 43 0 8 0 bufpl 288 6835 0 434 458 0 458 458 0 8 0 anonpl 24 384871 0 368908 155 34 121 127 0 188 8 anonpl: pool(0xffffffff829e64b0:anonpl): page inconsistency: page 0x0; at page head addr 0xfffffd807635bf90 (p 0xfffffd807635b000) amapchunkpl 152 30888 0 30239 38 11 27 36 0 158 0 amappl16 200 5346 0 4767 57 18 39 43 0 8 8 amappl15 192 522 0 520 1 0 1 1 0 8 0 amappl14 184 256 0 249 1 0 1 1 0 8 0 amappl13 176 527 0 524 1 0 1 1 0 8 0 amappl12 168 8 0 6 2 1 1 1 0 8 0 amappl11 160 91 0 75 1 0 1 1 0 8 0 amappl10 152 371 0 363 1 0 1 1 0 8 0 amappl9 144 618 0 615 1 0 1 1 0 8 0 amappl8 136 986 0 924 3 0 3 3 0 8 0 amappl7 128 393 0 378 1 0 1 1 0 8 0 amappl6 120 388 0 368 2 1 1 2 0 8 0 amappl5 112 1584 0 1567 1 0 1 1 0 8 0 amappl4 104 1250 0 1219 2 1 1 2 0 8 0 amappl3 96 5336 0 5286 2 0 2 2 0 8 0 amappl2 88 2827 0 2765 3 1 2 3 0 8 0 amappl1 80 49723 0 49101 21 6 15 19 0 8 0 amappl 88 10326 0 10142 5 0 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 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 72 107 0 9 2 0 2 2 0 8 0 uaddrrnd 24 2173 0 2052 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2173 0 2052 1 0 1 1 0 8 0 vmmpekpl 168 18315 0 18258 3 0 3 3 0 8 0 vmmpepl 168 205065 0 202340 169 36 133 149 0 357 8 vmsppl 272 2172 0 2052 13 4 9 9 0 8 0 rwobjpl 24 53860 0 47375 40 0 40 40 0 8 0 pdppl 4096 4352 0 4198 310 152 158 160 0 8 4 pvpl 32 1120023 0 1100188 274 79 195 240 0 265 19 pmappl 216 2172 0 2052 7 0 7 7 0 8 0 extentpl 40 58 0 38 1 0 1 1 0 8 0 phpool 112 1251 0 348 26 0 26 26 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace pool_gc_pages(0) at pool_gc_pages+0x1a5 pool_p_remove sys/kern/subr_pool.c:1051 [inline] pool_gc_pages(0) at pool_gc_pages+0x1a5 sys/kern/subr_pool.c:1578 taskq_thread(ffffffff82981370) at taskq_thread+0x9b sys/kern/kern_task.c:449 end trace frame: 0x0, count: -2 ddb> machine ddbcpu 1 No such command ddb> trace pool_gc_pages(0) at pool_gc_pages+0x1a5 pool_p_remove sys/kern/subr_pool.c:1051 [inline] pool_gc_pages(0) at pool_gc_pages+0x1a5 sys/kern/subr_pool.c:1578 taskq_thread(ffffffff82981370) at taskq_thread+0x9b sys/kern/kern_task.c:449 end trace frame: 0x0, count: -2