uvm_fault(0xffffffff82b339b8, 0x45, 0, 2) -> e kernel: page fault trap, code=0 Stopped at uvm_map_teardown+0x1ca: movq $0,0x20(%r12) TID PID UID PRFLAGS PFLAGS CPU COMMAND *274994 64335 0 0x14000 0x200 1K reaper uvm_map_teardown(fffffd8074244760) at uvm_map_teardown+0x1ca dead_entry_push sys/uvm/uvm_map.c:551 [inline] uvm_map_teardown(fffffd8074244760) at uvm_map_teardown+0x1ca sys/uvm/uvm_map.c:2579 uvmspace_free(fffffd8074244760) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3504 reaper(ffff800021232d28) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: 12 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: uvm_fault(0xffffffff82b339b8, 0x45, 0, 2) -> e ddb{1}> trace uvm_map_teardown(fffffd8074244760) at uvm_map_teardown+0x1ca dead_entry_push sys/uvm/uvm_map.c:551 [inline] uvm_map_teardown(fffffd8074244760) at uvm_map_teardown+0x1ca sys/uvm/uvm_map.c:2579 uvmspace_free(fffffd8074244760) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3504 reaper(ffff800021232d28) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -3 ddb{1}> show registers rdi 0xffffffff827efad8 uvm_map_addr_RBT_INFO rsi 0xfffffd80747743b8 rbp 0xffff800021239480 rbx 0 rdx 0 rcx 0 rax 0x45 r8 0x59a4551d000 r9 0 r10 0xa6a2e52ac2debf4f r11 0x725e73dda2d69d35 r12 0x25 r13 0x40000 acpi_pdirpa+0x2be68 r14 0xfffffd8074244760 r15 0xfffffd80747743b8 rip 0xffffffff81f142ca uvm_map_teardown+0x1ca cs 0x8 rflags 0x10202 __ALIGN_SIZE+0xf202 rsp 0xffff800021239440 ss 0x10 uvm_map_teardown+0x1ca: movq $0,0x20(%r12) ddb{1}> show proc PROC (reaper) pid=274994 stat=onproc flags process=14000 proc=200 pri=4, usrpri=60, nice=20 forw=0xffffffffffffffff, list=0xffff800021232fc8,0xffff800021232a98 process=0xffff8000ffffedb8 user=0xffff800021234000, vmspace=0xffffffff82b339b8 estcpu=10, cpticks=1, pctcpu=1.23 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 22435 70880 19759 0 3 0x80 nanoslp syz-executor.0 22435 86877 19759 0 3 0x4000080 kqread syz-executor.0 22435 128092 19759 0 3 0x4000080 fsleep syz-executor.0 37244 341474 60924 0 3 0x80 nanoslp syz-executor.3 37244 356549 60924 0 3 0x4000080 netcon syz-executor.3 37244 436525 60924 0 3 0x4000080 fsleep syz-executor.3 29950 320895 5314 0 3 0x82 piperd syz-executor.7 16575 433399 1 0 3 0x100083 ttyin getty 23250 481317 5314 0 3 0x82 piperd syz-executor.6 19759 188684 5314 0 3 0x82 nanoslp syz-executor.0 38805 410190 5314 0 3 0x82 piperd syz-executor.2 28555 154860 5314 0 3 0x82 piperd syz-executor.4 37517 383894 1 0 3 0 vmmaplk syz-executor.4 37517 341164 1 0 3 0x4000000 vmmaplk syz-executor.4 60924 229359 5314 0 3 0x82 nanoslp syz-executor.3 70295 140321 0 0 3 0x14280 nfsidl nfsio 26724 211769 0 0 3 0x14280 nfsidl nfsio 25055 221695 0 0 3 0x14280 nfsidl nfsio 25129 349998 0 0 3 0x14280 nfsidl nfsio 27042 243540 0 0 3 0x14280 nfsidl nfsio 98124 483082 0 0 3 0x14280 nfsidl nfsio 89805 87894 0 0 3 0x14280 nfsidl nfsio 87575 178468 0 0 3 0x14280 nfsidl nfsio 94608 227157 0 0 3 0x14280 nfsidl nfsio 76952 276265 0 0 3 0x14280 nfsidl nfsio 71138 126853 0 0 3 0x14280 nfsidl nfsio 50997 288822 0 0 3 0x14280 nfsidl nfsio 74855 149744 0 0 3 0x14280 nfsidl nfsio 46567 14913 0 0 3 0x14280 nfsidl nfsio 2931 380616 0 0 3 0x14280 nfsidl nfsio 72384 443616 0 0 3 0x14280 nfsidl nfsio 15675 308528 0 0 3 0x14280 nfsidl nfsio 18265 456957 0 0 3 0x14280 nfsidl nfsio 72370 150300 0 0 3 0x14280 nfsidl nfsio 11554 289647 0 0 3 0x14280 nfsidl nfsio 85197 434449 0 0 3 0x14200 bored sosplice 514 232724 5314 0 3 0x82 piperd syz-executor.5 5314 408653 27427 0 3 0x82 thrsleep syz-fuzzer 5314 494471 27427 0 3 0x4000082 thrsleep syz-fuzzer 5314 358375 27427 0 3 0x4000082 wait syz-fuzzer 5314 111794 27427 0 3 0x4000082 thrsleep syz-fuzzer 5314 58024 27427 0 3 0x4000082 wait syz-fuzzer 5314 280871 27427 0 3 0x4000082 thrsleep syz-fuzzer 5314 348432 27427 0 3 0x4000082 thrsleep syz-fuzzer 5314 153368 27427 0 3 0x4000082 kqread syz-fuzzer 5314 64910 27427 0 3 0x4000082 thrsleep syz-fuzzer 5314 269586 27427 0 3 0x4000082 wait syz-fuzzer 5314 357685 27427 0 3 0x4000082 wait syz-fuzzer 5314 134210 27427 0 3 0x4000082 wait syz-fuzzer 5314 233055 27427 0 3 0x4000082 wait syz-fuzzer 5314 303808 27427 0 3 0x4000082 thrsleep syz-fuzzer 5314 341280 27427 0 3 0x4000082 wait syz-fuzzer 5314 466871 27427 0 3 0x4000082 wait syz-fuzzer 27427 484719 40510 0 3 0x10008a sigsusp ksh 40510 228683 90371 0 3 0x9a kqread sshd 90371 498047 1 0 3 0x88 kqread sshd 16503 22518 99365 74 3 0x1100092 bpf pflogd 99365 248731 1 0 3 0x80 netio pflogd 800 311680 81153 73 3 0x1100090 kqread syslogd 81153 338623 1 0 3 0x100082 netio syslogd 39832 91735 1 0 3 0x100080 kqread resolvd 8635 415004 78770 77 3 0x100092 kqread dhcpleased 85644 502222 78770 77 3 0x100092 kqread dhcpleased 78770 395116 1 0 3 0x80 kqread dhcpleased 56046 500478 0 0 3 0x14200 bored smr 5485 501684 0 0 3 0x14200 pgzero zerothread 46931 199322 0 0 3 0x14200 aiodoned aiodoned 52464 420356 0 0 3 0x14200 syncer update 8985 123384 0 0 3 0x14200 cleaner cleaner *64335 274994 0 0 7 0x14200 reaper 75983 18406 0 0 3 0x14200 pgdaemon pagedaemon 75875 179469 0 0 3 0x14200 bored viomb 78647 438351 0 0 3 0x40014200 acpi0 acpi0 41774 102161 0 0 3 0x40014200 idle1 71476 166161 0 0 3 0x14200 bored softnet 61864 178550 0 0 3 0x14200 bored softnet 32812 50956 0 0 3 0x14200 bored softnet 37450 428860 0 0 3 0x14200 bored softnet 74780 165151 0 0 3 0x14200 bored systqmp 92650 202826 0 0 3 0x14200 bored systq 77752 20117 0 0 3 0x40014200 bored softclock 51990 446035 0 0 7 0x40014200 idle0 1 377721 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 37517 (syz-executor.4) thread 0xffff800021334d20 (341164) shared rwlock vmmaplk r = 0 (0xfffffd8068474600) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5323 #3 uvm_map_pageable+0x11a sys/uvm/uvm_map.c:2293 #4 sys_mlock+0x184 sys/uvm/uvm_mmap.c:834 #5 syscall+0x438 mi_syscall sys/sys/syscall_mi.h:101 [inline] #5 syscall+0x438 sys/arch/amd64/amd64/trap.c:599 #6 Xsyscall+0x128 Process 64335 (reaper) thread 0xffff800021232d28 (274994) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82aea660) #0 witness_lock+0x44d #1 kpageflttrap+0x29a sys/arch/amd64/amd64/trap.c:288 #2 kerntrap+0xef sys/arch/amd64/amd64/trap.c:332 #3 alltraps_kern_meltdown+0x7b #4 uvm_map_teardown+0x1ca dead_entry_push sys/uvm/uvm_map.c:551 [inline] #4 uvm_map_teardown+0x1ca sys/uvm/uvm_map.c:2579 #5 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3504 #6 reaper+0x19a sys/kern/kern_exit.c:448 #7 proc_trampoline+0x1c exclusive rwlock vmmaplk r = 0 (0xfffffd8074244778) #0 witness_lock+0x44d #1 rw_enter+0x3e1 sys/kern/kern_rwlock.c:310 #2 vm_map_lock_ln+0xda sys/uvm/uvm_map.c:5323 #3 uvm_map_teardown+0x84 sys/uvm/uvm_map.c:2546 #4 uvmspace_free+0xa6 sys/uvm/uvm_map.c:3504 #5 reaper+0x19a sys/kern/kern_exit.c:448 #6 proc_trampoline+0x1c ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10248 6512K 8092K 78643K 18012 0 pcb 13 18K 21K 78643K 1383 0 rtable 164 7K 9K 78643K 2126 0 ifaddr 137 28K 31K 78643K 843 0 sysctl 3 1K 1K 78643K 5 0 counters 60 35K 37K 78643K 684 0 ioctlops 0 0K 4K 78643K 2231 0 iov 0 0K 32K 78643K 916 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1706 107K 107K 78643K 6072 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 62 0 VM map 2 1K 1K 78643K 2 0 sem 20 11K 20K 78643K 2410 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 12 41K 89K 78643K 6867 0 sigio 0 0K 0K 78643K 183 0 proc 70 91K 127K 78643K 1583 0 subproc 104 6K 11K 78643K 541 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 372 0 in_multi 56 3K 6K 78643K 777 0 ether_multi 1 0K 0K 78643K 28 0 mrt 1 0K 0K 78643K 22 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 241 1076K 1076K 78643K 241 0 exec 0 0K 1K 78643K 1615 0 pfkey data 0 0K 0K 78643K 68 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 401 570K 585K 78643K 50151 0 UVM aobj 124 7K 7K 78643K 130 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 297 0 NDP 15 0K 2K 78643K 233 0 temp 153 4699K 70234K 78643K 70471 0 kqueue 16 22K 24K 78643K 547 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> 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 1031 0 1028 17 16 1 3 0 8 0 rtentry 112 661 0 594 4 1 3 4 0 8 0 unpcb 144 16022 0 15999 128 124 4 11 0 8 3 syncache 296 62 0 62 18 18 0 1 0 8 0 tcpqe 32 150 0 150 13 13 0 1 0 8 0 tcpcb 776 2935 0 2928 82 79 3 11 0 8 1 arp 120 79 0 65 1 0 1 1 0 8 0 inpcb 368 7421 0 7408 127 123 4 14 0 8 1 nd6 48 144 0 133 1 0 1 1 0 8 0 pkpcb 40 7 0 7 2 2 0 1 0 8 0 kcovpl 48 31 0 23 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 1 0 1 0 8 0 ppxss 1256 239 0 239 16 16 0 1 0 8 0 pppxif 1704 100 0 100 13 13 0 1 0 8 0 pfstscr 40 132 0 129 2 1 1 1 0 8 0 pffrag 232 4 0 3 3 2 1 1 0 482 0 pffrnode 88 4 0 3 3 2 1 1 0 8 0 pffrent 40 15 0 14 5 4 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 pfanchor 1280 383 0 184 22 2 20 22 0 8 0 pfqueue 264 5 0 5 2 2 0 1 0 8 0 pfstitem 24 30 0 25 2 1 1 1 0 8 0 pfstkey 120 184 0 182 2 1 1 1 0 8 0 pfstate 384 95 0 92 2 1 1 1 0 8 0 rttmr 136 8 0 8 3 3 0 1 0 8 0 art_heap8 4096 10 0 8 8 5 3 3 0 8 1 art_heap4 256 3189 0 2894 37 10 27 29 0 8 0 art_table 32 3199 0 2902 4 0 4 4 0 8 0 art_node 16 658 0 599 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 7 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 2397 0 2379 1 0 1 1 0 8 0 shmpl 112 127 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 10644 0 9175 93 0 93 93 0 8 0 ffsino 272 10644 0 9175 99 0 99 99 0 8 0 nchpl 144 21095 0 20592 63 39 24 63 0 8 0 rtmask 32 6 0 6 2 2 0 1 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 77211 0 77211 5 4 1 2 0 8 1 percpumem 16 354 0 312 1 0 1 1 0 8 0 vcpupl 2048 36 0 2 5 0 5 5 0 8 0 vmpool 568 38 0 4 3 0 3 3 0 8 0 kstatmem 264 242 0 212 3 0 3 3 0 8 0 scsiplug 72 7 0 7 3 3 0 1 0 8 0 scxspl 216 58420 0 58420 21 20 1 7 0 8 1 plimitpl 152 730 0 713 1 0 1 1 0 8 0 sigapl 424 7153 0 7089 10 2 8 8 0 8 0 futexpl 64 63433 0 63431 3 2 1 1 0 8 0 knotepl 120 647 0 0 10 1 9 9 0 8 0 kqueuepl 216 1699 0 1657 43 40 3 5 0 8 0 pipepl 320 1703 0 1675 57 54 3 13 0 8 0 fdescpl 496 7114 0 7089 5 0 5 5 0 8 0 filepl 152 63036 0 62720 155 137 18 26 0 8 4 lockfpl 104 2181 0 2179 6 5 1 2 0 8 0 lockfspl 48 543 0 541 1 0 1 1 0 8 0 sessionpl 144 50 0 32 1 0 1 1 0 8 0 pgrppl 48 74 0 56 1 0 1 1 0 8 0 ucredpl 104 6183 0 6168 1 0 1 1 0 8 0 zombiepl 144 7090 0 7089 3 2 1 1 0 8 0 processpl 1064 7153 0 7089 5 0 5 5 0 8 0 procpl 672 20830 0 20746 23 14 9 11 0 8 0 srpgc 96 29 0 29 10 9 1 1 0 8 1 sosppl 168 96 0 96 9 9 0 1 0 8 0 sockpl 488 24553 0 24516 683 669 14 38 0 8 8 mcl64k 65536 17 0 0 3 0 3 3 0 8 0 mcl16k 16384 25 0 0 4 1 3 3 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 9 0 0 1 0 1 1 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 18 0 0 3 0 3 3 0 8 0 mcl2k2 2112 7 0 0 1 0 1 1 0 8 0 mcl2k 2048 443 0 0 45 11 34 45 0 8 0 mtagpl 96 392 0 0 9 2 7 9 0 8 0 mbufpl 256 6645 0 0 415 0 415 415 0 8 0 bufpl 288 14338 0 8004 453 0 453 453 0 8 0 anonpl 24 1482387 0 1464771 211 89 122 138 0 186 0 amapchunkpl 152 141890 0 141073 89 50 39 46 0 158 0 amappl16 200 13366 0 12872 104 77 27 39 0 8 0 amappl15 192 11 0 11 1 1 0 1 0 8 0 amappl14 184 224 0 211 2 1 1 2 0 8 0 amappl13 176 23 0 22 1 0 1 1 0 8 0 amappl12 168 694 0 692 1 0 1 1 0 8 0 amappl11 160 54 0 39 1 0 1 1 0 8 0 amappl10 152 57 0 42 1 0 1 1 0 8 0 amappl9 144 1017 0 1016 1 0 1 1 0 8 0 amappl8 136 389 0 309 3 0 3 3 0 8 0 amappl7 128 100 0 79 1 0 1 1 0 8 0 amappl6 120 563 0 546 2 1 1 2 0 8 0 amappl5 112 181 0 169 1 0 1 1 0 8 0 amappl4 104 923 0 891 2 1 1 2 0 8 0 amappl3 96 21397 0 21344 2 0 2 2 0 8 0 amappl2 88 7828 0 7759 3 1 2 3 0 8 0 amappl1 80 165431 0 164697 22 4 18 22 0 8 0 amappl 88 49446 0 49211 8 1 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 72 129 0 6 3 0 3 3 0 8 0 uaddrrnd 24 7152 0 7093 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7152 0 7093 1 0 1 1 0 8 0 vmmpekpl 168 61629 0 61544 5 0 5 5 0 8 0 vmmpepl 168 658574 0 656015 257 121 136 148 0 357 0 vmmpepl: pool(0xffffffff82b379a0:vmmpepl): page inconsistency: page 0x0; at page head addr 0xfffffd8074774f90 (p 0xfffffd8074774000) vmsppl 368 7151 0 7092 7 1 6 6 0 8 0 rwobjpl 56 182996 0 175185 124 10 114 116 0 8 0 pdppl 4096 14311 0 14218 488 384 104 104 0 8 11 pvpl 32 2931988 0 2908739 428 209 219 275 0 265 0 pmappl 248 7151 0 7092 6 1 5 5 0 8 1 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 1819 0 559 37 0 37 37 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1a: addq $0x8,%rsp x86_ipi_db(ffffffff82934ff0) 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(ffffffff82934ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175 end trace frame: 0x0, count: 10 ddb{0}> trace x86_ipi_db(ffffffff82934ff0) 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(ffffffff82934ff0) at sched_idle+0x417 sys/kern/kern_sched.c:175 end trace frame: 0x0, count: -5 ddb{0}> machine ddbcpu 1 Stopped at uvm_map_teardown+0x1ca: movq $0,0x20(%r12) uvm_map_teardown(fffffd8074244760) at uvm_map_teardown+0x1ca dead_entry_push sys/uvm/uvm_map.c:551 [inline] uvm_map_teardown(fffffd8074244760) at uvm_map_teardown+0x1ca sys/uvm/uvm_map.c:2579 uvmspace_free(fffffd8074244760) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3504 reaper(ffff800021232d28) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: 12 ddb{1}> trace uvm_map_teardown(fffffd8074244760) at uvm_map_teardown+0x1ca dead_entry_push sys/uvm/uvm_map.c:551 [inline] uvm_map_teardown(fffffd8074244760) at uvm_map_teardown+0x1ca sys/uvm/uvm_map.c:2579 uvmspace_free(fffffd8074244760) at uvmspace_free+0xa6 sys/uvm/uvm_map.c:3504 reaper(ffff800021232d28) at reaper+0x19a sys/kern/kern_exit.c:448 end trace frame: 0x0, count: -3