uvm_fault(0xffffffff82a492c8, 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 *259827 6452 0 0x14000 0x200 0 systqmp pool_gc_pages(0) at pool_gc_pages+0x1a5 pool_p_remove sys/kern/subr_pool.c:1049 [inline] pool_gc_pages(0) at pool_gc_pages+0x1a5 sys/kern/subr_pool.c:1576 taskq_thread(ffffffff82987e30) 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(0xffffffff82a492c8, 0x0, 0, 2) -> e ddb> trace pool_gc_pages(0) at pool_gc_pages+0x1a5 pool_p_remove sys/kern/subr_pool.c:1049 [inline] pool_gc_pages(0) at pool_gc_pages+0x1a5 sys/kern/subr_pool.c:1576 taskq_thread(ffffffff82987e30) at taskq_thread+0x9b sys/kern/kern_task.c:449 end trace frame: 0x0, count: -2 ddb> show registers rdi 0 rsi 0xf90 rbp 0xffff800021690080 rbx 0xf90 rdx 0 rcx 0 rax 0 r8 0 r9 0x1 r10 0x5c665e3c8ec7cdc0 r11 0xe097e728c75a35de r12 0x1dcd65000 r13 0xfffffd8076783f90 r14 0 r15 0xffffffff829f1cd0 pmap_pv_pool rip 0xffffffff8114a005 pool_gc_pages+0x1a5 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021690040 ss 0x10 pool_gc_pages+0x1a5: movq %rax,0(%rcx) ddb> show proc PROC (systqmp) pid=259827 stat=onproc flags process=14000 proc=200 pri=32, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffffe7e0,0xffff8000ffffe2b0 process=0xffff8000ffffc3e8 user=0xffff80002168b000, vmspace=0xffffffff82a492c8 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 3625 226598 88075 0 3 0x80 nanoslp syz-executor.1 3625 475295 88075 0 3 0x4000080 netcon syz-executor.1 3625 375627 88075 0 3 0x4000080 fsleep syz-executor.1 56790 372709 48255 0 3 0x80 nanoslp syz-executor.4 56790 153926 48255 0 3 0x4000080 fifor syz-executor.4 56790 84751 48255 0 3 0x4000080 fsleep syz-executor.4 46497 253333 58098 0 3 0x82 piperd syz-executor.0 8736 257859 58098 0 3 0x82 piperd syz-executor.6 10930 442587 58098 0 3 0x82 piperd syz-executor.7 88075 96465 58098 0 2 0x482 syz-executor.1 48255 315171 58098 0 3 0x82 nanoslp syz-executor.4 85564 470108 0 0 3 0x14200 acct acct 30481 515167 0 0 3 0x14280 nfsidl nfsio 38059 328281 0 0 3 0x14280 nfsidl nfsio 60882 375114 0 0 3 0x14280 nfsidl nfsio 415 102653 0 0 3 0x14280 nfsidl nfsio 37383 35265 0 0 3 0x14280 nfsidl nfsio 93384 377040 0 0 3 0x14280 nfsidl nfsio 79775 448394 0 0 3 0x14280 nfsidl nfsio 52010 148221 0 0 3 0x14280 nfsidl nfsio 58588 64595 0 0 3 0x14280 nfsidl nfsio 70282 196459 0 0 3 0x14280 nfsidl nfsio 21504 41609 0 0 3 0x14280 nfsidl nfsio 59961 355874 0 0 3 0x14280 nfsidl nfsio 85202 264043 0 0 3 0x14280 nfsidl nfsio 11384 16151 0 0 3 0x14280 nfsidl nfsio 87246 169158 0 0 3 0x14280 nfsidl nfsio 25634 19250 0 0 3 0x14280 nfsidl nfsio 61788 343121 0 0 3 0x14280 nfsidl nfsio 83164 121592 0 0 3 0x14280 nfsidl nfsio 55913 319984 0 0 3 0x14280 nfsidl nfsio 91853 436055 0 0 3 0x14280 nfsidl nfsio 85325 440540 0 0 3 0x14200 bored sosplice 52249 10030 58098 0 3 0x82 piperd syz-executor.5 11545 498352 58098 0 3 0x82 piperd syz-executor.3 39142 457042 58098 0 3 0x82 piperd syz-executor.2 58098 225558 60577 0 3 0x82 wait syz-fuzzer 58098 356125 60577 0 3 0x4000082 thrsleep syz-fuzzer 58098 337381 60577 0 3 0x4000082 wait syz-fuzzer 58098 313845 60577 0 3 0x4000082 thrsleep syz-fuzzer 58098 506582 60577 0 3 0x4000082 thrsleep syz-fuzzer 58098 100061 60577 0 3 0x4000082 wait syz-fuzzer 58098 95499 60577 0 3 0x4000082 thrsleep syz-fuzzer 58098 235365 60577 0 3 0x4000082 wait syz-fuzzer 58098 172401 60577 0 3 0x4000082 thrsleep syz-fuzzer 58098 363107 60577 0 3 0x4000082 wait syz-fuzzer 58098 480017 60577 0 3 0x4000082 wait syz-fuzzer 58098 467853 60577 0 3 0x4000082 wait syz-fuzzer 58098 259868 60577 0 3 0x4000082 kqread syz-fuzzer 58098 366508 60577 0 3 0x4000082 wait syz-fuzzer 60577 69202 39824 0 3 0x10008a sigsusp ksh 39824 82287 68714 0 3 0x9a kqread sshd 46780 191343 1 0 3 0x100083 ttyin getty 68714 10693 1 0 3 0x88 kqread sshd 13613 383140 22540 73 3 0x1100090 kqread syslogd 22540 338120 1 0 3 0x100082 netio syslogd 49617 335060 1 0 3 0x100080 kqread resolvd 85004 67016 98461 77 3 0x100092 kqread dhcpleased 78265 281462 98461 77 3 0x100092 kqread dhcpleased 98461 321807 1 0 3 0x80 kqread dhcpleased 14761 207525 0 0 3 0x14200 bored smr 57554 61590 0 0 3 0x14200 pgzero zerothread 10087 68855 0 0 3 0x14200 aiodoned aiodoned 15148 68906 0 0 3 0x14200 syncer update 70957 434442 0 0 3 0x14200 cleaner cleaner 2061 192030 0 0 3 0x14200 reaper reaper 42420 238311 0 0 3 0x14200 pgdaemon pagedaemon 99068 290276 0 0 3 0x14200 bored viomb 95955 227716 0 0 3 0x40014200 acpi0 acpi0 89531 42765 0 0 3 0x14200 bored softnet 88506 394414 0 0 3 0x14200 bored softnet 30259 279977 0 0 3 0x14200 bored softnet 62365 238007 0 0 3 0x14200 bored softnet * 6452 259827 0 0 7 0x14200 systqmp 59111 238290 0 0 3 0x14200 bored systq 57895 502322 0 0 3 0x40014200 bored softclock 86620 162728 0 0 3 0x40014200 idle0 1 185005 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 10201 6429K 7570K 78643K 20064 0 pcb 13 14K 16K 78643K 569 0 rtable 233 19K 20K 78643K 1585 0 ifaddr 105 21K 22K 78643K 747 0 sysctl 2 0K 2K 78643K 69 0 counters 28 17K 17K 78643K 83 0 ioctlops 0 0K 4K 78643K 948 0 iov 0 0K 16K 78643K 378 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1430 89K 90K 78643K 5054 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 35 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 185 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 12 41K 69K 78643K 3732 0 sigio 0 0K 0K 78643K 131 0 proc 59 59K 75K 78643K 969 0 subproc 104 6K 6K 78643K 286 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 41 0 in_multi 86 5K 6K 78643K 490 0 ether_multi 1 0K 0K 78643K 7 0 mrt 0 0K 0K 78643K 17 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 175 784K 784K 78643K 175 0 exec 0 0K 2K 78643K 1250 0 pfkey data 0 0K 0K 78643K 3 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 8 62K 62K 78643K 8 0 UVM amap 320 526K 4200K 78643K 21265 0 UVM aobj 131 4K 4K 78643K 134 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 88 0 NDP 15 0K 2K 78643K 160 0 temp 141 4718K 5741K 78643K 90770 0 kqueue 14 22K 25K 78643K 431 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 120 383 0 380 5 4 1 3 0 8 0 rtentry 112 366 0 272 4 0 4 4 0 8 0 unpcb 144 2211 0 2196 27 21 6 10 0 8 5 syncache 296 27 0 27 7 6 1 1 0 8 1 tcpqe 32 76 0 76 3 2 1 1 0 8 1 tcpcb 768 1116 0 1105 45 42 3 11 0 8 1 arp 88 50 0 32 1 0 1 1 0 8 0 ipq 40 7 0 7 2 2 0 1 0 8 0 ipqe 40 16 0 16 2 2 0 1 0 8 0 inpcb 320 2848 0 2837 51 49 2 12 0 8 0 nd6 48 118 0 96 1 0 1 1 0 8 0 pkpcb 40 14 0 14 3 3 0 1 0 8 0 kcovpl 48 22 0 14 1 0 1 1 0 8 0 ppxss 1160 28 0 28 5 5 0 1 0 8 0 pfstscr 40 81 0 79 2 1 1 1 0 8 0 pfrktable 1344 134 0 127 1 0 1 1 0 8 0 pfanchor 1280 25 0 17 1 0 1 1 0 8 0 pftag 88 3 0 0 1 0 1 1 0 8 0 pfqueue 264 3 0 3 1 1 0 1 0 8 0 pfstitem 24 3 0 0 1 0 1 1 0 8 0 pfstkey 120 158 0 155 2 1 1 1 0 8 0 pfstate 336 81 0 79 2 1 1 1 0 8 0 pfrule 1360 181 0 159 8 6 2 2 0 8 0 rttmr 136 3 0 3 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1395 0 1009 36 11 25 29 0 8 0 art_table 32 1396 0 1009 4 0 4 4 0 8 0 art_node 16 358 0 276 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 6 1 0 1 1 0 8 0 semupl 112 6 0 6 2 2 0 1 0 8 0 semapl 112 173 0 163 1 0 1 1 0 8 0 shmpl 112 131 0 3 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 6383 0 4945 91 0 91 91 0 8 0 ffsino 240 6383 0 4945 85 0 85 85 0 8 0 nchpl 144 11413 0 9785 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 42181 0 42181 3 2 1 2 0 8 1 vcpupl 2048 98 0 1 13 0 13 13 0 8 0 vmpool 536 106 0 9 7 0 7 7 0 8 0 pfiaddrpl 120 50 0 34 5 4 1 1 0 8 0 kstatmem 264 136 0 106 5 2 3 3 0 8 0 scsiplug 72 11 0 11 3 3 0 1 0 8 0 scxspl 216 30621 0 30621 11 10 1 8 0 8 1 plimitpl 152 225 0 211 1 0 1 1 0 8 0 sigapl 424 4013 0 3952 8 0 8 8 0 8 0 futexpl 64 32998 0 32996 1 0 1 1 0 8 0 knotepl 120 42579 0 42406 34 27 7 7 0 8 1 kqueuepl 184 1195 0 1185 17 16 1 4 0 8 0 pipepl 288 827 0 799 15 12 3 7 0 8 0 fdescpl 432 3975 0 3952 4 0 4 4 0 8 0 filepl 120 27962 0 27725 48 36 12 15 0 8 4 lockfpl 104 716 0 714 1 0 1 1 0 8 0 lockfspl 48 225 0 223 1 0 1 1 0 8 0 sessionpl 144 37 0 21 1 0 1 1 0 8 0 pgrppl 48 37 0 21 1 0 1 1 0 8 0 ucredpl 104 3886 0 3876 1 0 1 1 0 8 0 zombiepl 144 3952 0 3952 2 1 1 1 0 8 1 processpl 1000 4013 0 3952 10 1 9 9 0 8 0 procpl 672 9510 0 9432 13 5 8 9 0 8 0 sosppl 168 47 0 47 6 5 1 1 0 8 1 sockpl 456 5457 0 5428 152 132 20 34 0 8 16 mcl64k 65536 89 0 89 6 5 1 1 0 8 1 mcl16k 16384 38 0 38 8 7 1 1 0 8 1 mcl12k 12288 101 0 101 6 5 1 1 0 8 1 mcl9k 9216 26 0 26 7 6 1 1 0 8 1 mcl8k 8192 195 0 195 5 4 1 1 0 8 1 mcl4k 4096 362 0 362 3 2 1 1 0 8 1 mcl2k2 2112 30 0 30 9 8 1 1 0 8 1 mcl2k 2048 76571 0 76509 18 8 10 13 0 8 0 mtagpl 96 523 0 302 8 1 7 7 0 8 0 mbufpl 256 146959 0 146501 320 288 32 298 0 8 0 bufpl 288 9039 0 2635 458 0 458 458 0 8 0 anonpl 24 707290 0 690138 148 35 113 132 0 188 0 amapchunkpl 152 230549 0 229969 2225 2199 26 2221 0 158 0 amappl16 200 9632 0 8956 63 26 37 49 0 8 0 amappl15 192 338 0 332 1 0 1 1 0 8 0 amappl14 184 6 0 3 1 0 1 1 0 8 0 amappl13 176 371 0 368 1 0 1 1 0 8 0 amappl12 168 853 0 846 1 0 1 1 0 8 0 amappl11 160 625 0 605 1 0 1 1 0 8 0 amappl10 152 344 0 338 1 0 1 1 0 8 0 amappl9 144 1364 0 1360 1 0 1 1 0 8 0 amappl8 136 1366 0 1291 3 0 3 3 0 8 0 amappl7 128 689 0 670 1 0 1 1 0 8 0 amappl6 120 1139 0 1128 2 1 1 2 0 8 0 amappl5 112 2555 0 2546 1 0 1 1 0 8 0 amappl4 104 2163 0 2133 2 1 1 2 0 8 0 amappl3 96 11451 0 11406 2 0 2 2 0 8 0 amappl2 88 1661 0 1625 2 0 2 2 0 8 0 amappl1 80 96855 0 96284 20 5 15 19 0 8 0 amappl 88 20481 0 20313 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 72 133 0 3 3 0 3 3 0 8 0 uaddrrnd 24 4081 0 3961 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 4081 0 3961 1 0 1 1 0 8 0 vmmpekpl 168 31289 0 31218 4 0 4 4 0 8 0 vmmpepl 168 388188 0 385612 183 47 136 142 0 357 2 vmsppl 272 4080 0 3961 10 1 9 9 0 8 0 rwobjpl 24 95894 0 88195 50 2 48 49 0 8 0 pdppl 4096 8168 0 8019 374 214 160 160 0 8 11 pvpl 32 1468055 0 1448469 296 127 169 254 0 265 0 pvpl: pool(0xffffffff829f1cd0:pvpl): page inconsistency: page 0x0; at page head addr 0xfffffd8076783f90 (p 0xfffffd8076783000) pmappl 216 4080 0 3961 7 0 7 7 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1462 0 563 33 7 26 30 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:1049 [inline] pool_gc_pages(0) at pool_gc_pages+0x1a5 sys/kern/subr_pool.c:1576 taskq_thread(ffffffff82987e30) 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:1049 [inline] pool_gc_pages(0) at pool_gc_pages+0x1a5 sys/kern/subr_pool.c:1576 taskq_thread(ffffffff82987e30) at taskq_thread+0x9b sys/kern/kern_task.c:449 end trace frame: 0x0, count: -2