uvm_fault(0xfffffd8069767020, 0x18ff000008, 0, 1) -> e kernel: page fault trap, code=0 Stopped at witness_checkorder+0x1ec: movl 0x8(%r14),%ebx TID PID UID PRFLAGS PFLAGS CPU COMMAND witness_checkorder(fffffd806f2256d0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f2256c0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002121ad50,fffffd806f2256c0,fffffd806f225748,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121ad50,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121ad50) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121ad50,0,0,3) at exit1+0x3e4 sys/kern/kern_exit.c:206 single_thread_check_locked(ffff80002121ad50,0) at single_thread_check_locked+0x24b sys/kern/kern_sig.c:2016 userret(ffff80002121ad50) at userret+0x72 single_thread_check sys/kern/kern_sig.c:2060 [inline] userret(ffff80002121ad50) at userret+0x72 sys/kern/kern_sig.c:1970 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x79e97560aa40, count: 6 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(0xfffffd8069767020, 0x18ff000008, 0, 1) -> e ddb{0}> trace witness_checkorder(fffffd806f2256d0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f2256c0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002121ad50,fffffd806f2256c0,fffffd806f225748,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121ad50,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121ad50) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121ad50,0,0,3) at exit1+0x3e4 sys/kern/kern_exit.c:206 single_thread_check_locked(ffff80002121ad50,0) at single_thread_check_locked+0x24b sys/kern/kern_sig.c:2016 userret(ffff80002121ad50) at userret+0x72 single_thread_check sys/kern/kern_sig.c:2060 [inline] userret(ffff80002121ad50) at userret+0x72 sys/kern/kern_sig.c:1970 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x79e97560aa40, count: -9 ddb{0}> show registers rdi 0 rsi 0x20000 acpi_pdirpa+0xbe63 rbp 0xffff80002617cde0 rbx 0xe rdx 0 rcx 0xffff80002121ad50 rax 0xffffffff82c05ff0 cpu_info_full_primary+0x1ff0 r8 0 r9 0 r10 0xd46c9ea82780f17c r11 0x25fcfcfae89b3536 r12 0 r13 0xfffffd806f2256d0 r14 0x18ff000000 r15 0xffff80002121ad50 rip 0xffffffff81ef9c8c witness_checkorder+0x1ec cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002617cd30 ss 0x10 witness_checkorder+0x1ec: movl 0x8(%r14),%ebx ddb{0}> show proc PROC (syz-executor.1) pid=221155 stat=onproc flags process=1018 proc=82000 pri=0, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80002121aaa8,0xffff80002121a2c0 process=0xffff8000ffff7258 user=0xffff800026178000, vmspace=0xfffffd8069767020 estcpu=36, cpticks=5, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 88237 112532 76590 32767 3 0x90 nanoslp syz-executor.7 88237 327066 76590 32767 3 0x4000090 kqread syz-executor.7 77210 476149 83863 32767 3 0x90 nanoslp syz-executor.5 77210 367520 83863 32767 3 0x4000090 netio syz-executor.5 77210 183928 83863 32767 3 0x4000090 fsleep syz-executor.5 83863 423436 43344 32767 3 0x90 nanoslp syz-executor.5 43344 371105 96736 0 3 0x82 wait syz-executor.5 60549 378470 0 0 3 0x14200 bored sosplice 60630 301474 76075 32767 3 0x90 piperd syz-executor.4 76075 273976 96736 0 3 0x82 wait syz-executor.4 61574 170347 29543 32767 3 0x90 piperd syz-executor.3 40844 51701 20276 32767 3 0x90 piperd syz-executor.6 20276 115998 96736 0 3 0x82 wait syz-executor.6 76590 36505 17895 32767 3 0x90 nanoslp syz-executor.7 17895 379220 96736 0 3 0x82 wait syz-executor.7 29543 329179 96736 0 3 0x82 wait syz-executor.3 47098 490025 81078 32767 3 0x90 piperd syz-executor.2 81078 124782 96736 0 3 0x82 wait syz-executor.2 39859 301447 34253 32767 3 0x90 nanoslp syz-executor.1 34253 282546 96736 0 3 0x82 wait syz-executor.1 14961 99919 56612 32767 3 0x90 piperd syz-executor.0 56612 208692 96736 0 3 0x82 wait syz-executor.0 96736 200530 42093 0 3 0x2000082 wait syz-fuzzer 96736 460340 42093 0 3 0x6000082 thrsleep syz-fuzzer 96736 89235 42093 0 3 0x6000082 thrsleep syz-fuzzer 96736 418904 42093 0 3 0x6000082 wait syz-fuzzer 96736 275494 42093 0 3 0x6000082 thrsleep syz-fuzzer 96736 386650 42093 0 3 0x6000082 thrsleep syz-fuzzer 96736 49084 42093 0 3 0x6000082 thrsleep syz-fuzzer 96736 349139 42093 0 3 0x6000082 wait syz-fuzzer 96736 309433 42093 0 3 0x6000082 wait syz-fuzzer 96736 358277 42093 0 3 0x6000082 wait syz-fuzzer 96736 316879 42093 0 3 0x6000082 thrsleep syz-fuzzer 96736 481762 42093 0 3 0x6000082 wait syz-fuzzer 96736 426240 42093 0 3 0x6000082 kqread syz-fuzzer 96736 445325 42093 0 3 0x6000082 wait syz-fuzzer 96736 299990 42093 0 3 0x6000082 wait syz-fuzzer 96736 258852 42093 0 3 0x6000082 thrsleep syz-fuzzer 42093 469780 85230 0 3 0x10008a sigsusp ksh 85230 511421 53151 0 3 0x9a kqread sshd 91627 205355 1 0 3 0x100083 ttyin getty 53151 343605 1 0 3 0x88 kqread sshd 97538 144749 52519 73 3 0x1100090 kqread syslogd 52519 96904 1 0 3 0x100082 netio syslogd 32713 467398 1 0 3 0x100080 kqread resolvd 80324 499350 30297 77 3 0x100092 kqread dhcpleased 97980 262061 30297 77 3 0x100092 kqread dhcpleased 30297 196235 1 0 3 0x80 kqread dhcpleased 60343 123407 0 0 3 0x14200 bored smr 40829 440771 0 0 2 0x14200 zerothread 90737 507148 0 0 3 0x14200 aiodoned aiodoned 40618 325072 0 0 3 0x14200 syncer update 27703 231127 0 0 3 0x14200 cleaner cleaner 12244 50240 0 0 2 0x14200 reaper 29126 417984 0 0 3 0x14200 pgdaemon pagedaemon 94406 493731 0 0 3 0x14200 bored viomb 75971 291500 0 0 3 0x40014200 acpi0 acpi0 72844 212844 0 0 7 0x40014200 idle1 40164 307141 0 0 3 0x14200 bored softnet3 21907 134755 0 0 3 0x14200 bored softnet2 76712 8077 0 0 3 0x14200 bored softnet1 52252 296736 0 0 3 0x14200 bored softnet0 98045 3175 0 0 3 0x14200 bored systqmp 80913 310965 0 0 3 0x14200 bored systq 34482 410872 0 0 2 0x40014200 softclock 96840 146468 0 0 3 0x40014200 idle0 1 7923 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10207 6411K 6420K 78643K 11295 0 pcb 13 10K 12K 78643K 15 0 rtable 238 6K 7K 78643K 477 0 pf 29 8K 8K 78643K 35 0 ifaddr 44 15K 15K 78643K 58 0 ifgroup 50 2K 2K 78643K 62 0 sysctl 3 1K 1K 78643K 3 0 counters 60 35K 35K 78643K 66 0 ioctlops 0 0K 2K 78643K 42 0 iov 0 0K 16K 78643K 241 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1278 80K 80K 78643K 1757 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 45 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 0K 78643K 700 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 21 77K 121K 78643K 2023 0 sigio 0 0K 0K 78643K 48 0 proc 56 78K 103K 78643K 667 0 subproc 104 6K 6K 78643K 143 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 152 0 in_multi 99 7K 7K 78643K 162 0 ether_multi 1 0K 0K 78643K 4 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 181 811K 811K 78643K 181 0 exec 0 0K 1K 78643K 457 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 64K 78643K 10 0 UVM amap 356 91K 104K 78643K 22017 0 UVM aobj 131 4K 4K 78643K 131 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 20 0 NDP 11 0K 2K 78643K 36 0 temp 74 5920K 5990K 78643K 8762 0 kqueue 12 18K 36K 78643K 522 0 SYN cache 2 16K 16K 78643K 2 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 120 223 0 220 4 3 1 3 0 8 0 rtentry 112 146 0 34 4 0 4 4 0 8 0 unpcb 144 1359 0 1342 18 17 1 7 0 8 0 syncache 304 24 0 24 5 5 0 1 0 8 0 tcpqe 32 284 0 284 4 4 0 1 0 8 0 tcpcb 808 1057 0 1048 34 32 2 11 0 8 0 arp 120 25 0 6 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 2 1 0 1 1 0 8 0 inpcb 368 1500 0 1485 30 28 2 11 0 8 0 nd6 136 34 0 9 1 0 1 1 0 8 0 kcovpl 48 11 0 3 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 588 0 132 29 0 29 29 0 8 0 art_table 32 589 0 132 4 0 4 4 0 8 0 art_node 16 145 0 43 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 4 1 0 1 1 0 8 0 semapl 112 698 0 688 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 4033 0 2595 91 0 91 91 0 8 0 ffsino 272 4033 0 2595 97 0 97 97 0 8 0 nchpl 144 6722 0 5085 63 0 63 63 0 8 0 uvmvnodes 80 4185 0 0 86 0 86 86 0 8 0 vnodes 216 4185 0 0 233 0 233 233 0 8 0 namei 1024 22403 0 22403 3 2 1 2 0 8 1 percpumem 16 46 0 3 1 0 1 1 0 8 0 kstatmem 264 28 0 6 2 0 2 2 0 8 0 scxspl 216 28522 0 28522 18 17 1 8 1 8 1 plimitpl 152 346 0 323 5 4 1 2 0 8 0 sigapl 424 2317 0 2267 7 0 7 7 0 8 0 futexpl 64 17815 0 17814 1 0 1 1 0 8 0 knotepl 120 357 0 0 9 0 9 9 0 8 0 kqueuepl 216 2277 0 2268 32 25 7 7 0 8 6 pipepl 320 2560 0 2530 36 30 6 12 0 8 3 fdescpl 496 2299 0 2267 7 2 5 6 0 8 0 filepl 152 18580 0 18338 51 33 18 20 0 8 8 lockfpl 104 403 0 401 1 0 1 1 0 8 0 lockfspl 48 141 0 139 1 0 1 1 0 8 0 sessionpl 144 26 0 10 1 0 1 1 0 8 0 pgrppl 48 37 0 21 1 0 1 1 0 8 0 ucredpl 104 2154 0 2136 1 0 1 1 0 8 0 zombiepl 144 2268 0 2267 1 0 1 1 0 8 0 processpl 1072 2317 0 2267 5 1 4 5 0 8 0 procpl 680 5736 0 5667 12 4 8 8 0 8 0 sosppl 168 16 0 16 3 3 0 1 0 8 0 sockpl 488 3137 0 3105 78 69 9 23 0 8 4 mcl64k 65536 15 0 0 2 0 2 2 0 8 0 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 13 0 0 2 0 2 2 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 12 0 0 2 0 2 2 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k2 2112 5 0 0 1 0 1 1 0 8 0 mcl2k 2048 358 0 0 45 0 45 45 0 8 0 mtagpl 96 5 0 0 1 0 1 1 0 8 0 mbufpl 256 1109 0 0 63 1 62 62 0 8 0 bufpl 288 7572 0 1244 453 0 453 453 0 8 0 anonpl 24 381134 0 369973 102 22 80 97 0 186 0 amapchunkpl 152 71458 0 70582 60 21 39 49 0 158 2 amappl16 200 8873 0 8601 35 19 16 27 0 8 0 amappl15 192 12 0 11 1 0 1 1 0 8 0 amappl14 184 158 0 144 2 1 1 2 0 8 0 amappl13 176 7 0 7 1 1 0 1 0 8 0 amappl12 168 2974 0 2940 2 0 2 2 0 8 0 amappl11 160 54 0 44 1 0 1 1 0 8 0 amappl10 152 31 0 22 1 0 1 1 0 8 0 amappl9 144 223 0 222 2 1 1 1 0 8 0 amappl8 136 246 0 179 3 0 3 3 0 8 0 amappl7 128 74 0 58 2 0 2 2 0 8 0 amappl6 120 262 0 246 2 1 1 2 0 8 0 amappl5 112 223 0 213 1 0 1 1 0 8 0 amappl4 104 618 0 583 2 0 2 2 0 8 0 amappl3 96 14076 0 13986 5 2 3 4 0 8 0 amappl2 88 2624 0 2551 3 1 2 3 0 8 0 amappl1 80 16508 0 15985 22 10 12 22 0 8 0 amappl 88 21415 0 21174 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 72 130 0 0 3 0 3 3 0 8 0 uaddrrnd 24 2299 0 2267 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2299 0 2267 1 0 1 1 0 8 0 vmmpekpl 168 31847 0 31788 4 0 4 4 0 8 0 vmmpepl 168 154038 0 151830 140 32 108 117 0 357 1 vmsppl 464 2298 0 2267 7 2 5 6 0 8 0 rwobjpl 56 49075 0 43470 85 5 80 80 0 8 0 pdppl 4096 4606 0 4534 176 94 82 94 0 8 10 pvpl 32 946833 0 929698 346 142 204 343 0 265 50 pmappl 248 2298 0 2267 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1048 0 163 26 0 26 26 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace witness_checkorder(fffffd806f2256d0,9,0) at witness_checkorder+0x1ec sys/kern/subr_witness.c:794 mtx_enter(fffffd806f2256c0) at mtx_enter+0x3e sys/kern/kern_lock.c:265 knote_remove(ffff80002121ad50,fffffd806f2256c0,fffffd806f225748,3,0) at knote_remove+0x20d sys/kern/kern_event.c:1881 knote_fdclose(ffff80002121ad50,3) at knote_fdclose+0xae sys/kern/kern_event.c:1934 fdfree(ffff80002121ad50) at fdfree+0xdf sys/kern/kern_descrip.c:1196 exit1(ffff80002121ad50,0,0,3) at exit1+0x3e4 sys/kern/kern_exit.c:206 single_thread_check_locked(ffff80002121ad50,0) at single_thread_check_locked+0x24b sys/kern/kern_sig.c:2016 userret(ffff80002121ad50) at userret+0x72 single_thread_check sys/kern/kern_sig.c:2060 [inline] userret(ffff80002121ad50) at userret+0x72 sys/kern/kern_sig.c:1970 intr_user_exit() at intr_user_exit+0x3c end of kernel end trace frame: 0x79e97560aa40, count: -9 ddb{0}> machine ddbcpu 1