uvm_fault(0xffffffff8255d208, 0x7fbfbfffffa0, 0, 2) -> e kernel: page fault trap, code=0 Stopped at pmap_page_remove+0x33d: xchgq %rax,0(%r12,%rcx,1) ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic kernel page fault uvm_fault(0xffffffff8255d208, 0x7fbfbfffffa0, 0, 2) -> e pmap_page_remove(fffffd8005aa2b00) at pmap_page_remove+0x33d _atomic_swap_64 machine/atomic.h:117 [inline] pmap_page_remove(fffffd8005aa2b00) at pmap_page_remove+0x33d sys/arch/amd64/amd64/pmap.c:1946 end trace frame: 0xffff80001d33c330, count: 0 ddb> trace pmap_page_remove(fffffd8005aa2b00) at pmap_page_remove+0x33d _atomic_swap_64 machine/atomic.h:117 [inline] pmap_page_remove(fffffd8005aa2b00) at pmap_page_remove+0x33d sys/arch/amd64/amd64/pmap.c:1946 uvm_anfree_list(fffffd8058dafb80,ffff80001d33c350) at uvm_anfree_list+0x4e sys/uvm/uvm_anon.c:104 amap_wipeout(fffffd8067ae8378) at amap_wipeout+0x171 sys/uvm/uvm_amap.c:461 uvm_unmap_detach(ffff80001d33c410,1) at uvm_unmap_detach+0x163 sys/uvm/uvm_map.c:1582 uvm_map_teardown(fffffd80561e8aa8) at uvm_map_teardown+0x22c sys/uvm/uvm_map.c:2757 uvmspace_free(fffffd80561e8aa8) at uvmspace_free+0x86 sys/uvm/uvm_map.c:3611 uvm_exit(ffff8000ffffb510) at uvm_exit+0x29 sys/uvm/uvm_glue.c:297 reaper(ffff80001d2f2110) at reaper+0x15c sys/kern/kern_exit.c:443 end trace frame: 0x0, count: -8 ddb> show registers rdi 0 rsi 0 rbp 0xffff80001d33c2e0 rbx 0 rdx 0x100 rcx 0x7f8000000000 rax 0 r8 0 r9 0x7 r10 0xcd5f47c5e1256b5a r11 0x83a794d8ee6bf23f r12 0x3fbfffffa0 r13 0xfffffd805dc28d88 r14 0x800000006c3b6000 r15 0xfffffd8005aa2980 rip 0xffffffff814bf9dd pmap_page_remove+0x33d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d33c250 ss 0x10 pmap_page_remove+0x33d: xchgq %rax,0(%r12,%rcx,1) ddb> show proc PROC (reaper) pid=67210 stat=onproc flags process=14000 proc=200 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80001d2f1c30,0xffff80001d2f2d50 process=0xffff8000ffffce08 user=0xffff80001d337000, vmspace=0xffffffff8255d208 estcpu=36, cpticks=82, pctcpu=19.45 user=0, sys=2, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 24315 302799 72449 0 3 0x10008a pause sh 197 148869 70620 0 3 0x10008a pause sh 72449 189913 97255 0 3 0x82 wait syz-executor.1 70620 449482 97255 0 3 0x82 wait syz-executor.0 79316 183404 0 0 3 0x14200 acct acct 10432 446358 0 0 3 0x14200 bored sosplice 14756 68161 1 0 3 0x100083 ttyin getty 97255 218670 82334 0 3 0x82 thrsleep syz-fuzzer 97255 97199 82334 0 3 0x4000082 nanosleep syz-fuzzer 97255 8429 82334 0 3 0x4000082 thrsleep syz-fuzzer 97255 455328 82334 0 3 0x4000082 thrsleep syz-fuzzer 97255 145713 82334 0 3 0x4000082 thrsleep syz-fuzzer 97255 470922 82334 0 3 0x4000082 thrsleep syz-fuzzer 97255 196366 82334 0 3 0x4000082 thrsleep syz-fuzzer 97255 233567 82334 0 3 0x4000082 kqread syz-fuzzer 97255 76854 82334 0 3 0x4000082 thrsleep syz-fuzzer 82334 297644 98350 0 3 0x10008a pause ksh 98350 191580 28549 0 3 0x92 select sshd 28549 229905 1 0 3 0x80 select sshd 86615 137735 63668 73 2 0x100010 syslogd 63668 352470 1 0 3 0x100082 netio syslogd 77980 5605 1 77 3 0x100090 poll dhclient 84812 291941 1 0 3 0x80 poll dhclient 49834 189419 0 0 2 0x14200 zerothread 84107 93876 0 0 3 0x14200 aiodoned aiodoned 39874 126646 0 0 3 0x14200 syncer update 25538 490703 0 0 3 0x14200 cleaner cleaner * 93 67210 0 0 7 0x14200 reaper 65222 396231 0 0 3 0x14200 pgdaemon pagedaemon 23959 166909 0 0 3 0x14200 bored crynlk 56804 443321 0 0 3 0x14200 bored crypto 90449 234454 0 0 3 0x40014200 acpi0 acpi0 18184 503832 0 0 2 0x14200 softnet 66867 302619 0 0 3 0x14200 bored systqmp 96438 213219 0 0 3 0x14200 bored systq 59714 52494 0 0 3 0x40014200 bored softclock 66392 162720 0 0 3 0x40014200 idle0 53077 494509 0 0 3 0x14200 bored smr 1 305082 0 0 2 0x82 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 9496 6349K 7522K 78643K 11430 0 pcb 13 8K 8K 78643K 67 0 rtable 74 4K 5K 78643K 381 0 ifaddr 57 11K 14K 78643K 138 0 counters 19 16K 16K 78643K 30 0 ioctlops 0 0K 2K 78643K 32 0 iov 0 0K 12K 78643K 59 0 mount 1 1K 1K 78643K 1 0 vnodes 1229 77K 77K 78643K 1595 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 38 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 6 17K 25K 78643K 333 0 sigio 0 0K 0K 78643K 54 0 proc 49 38K 63K 78643K 519 0 subproc 34 2K 2K 78643K 102 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 19 0 in_multi 11 0K 2K 78643K 85 0 ether_multi 1 0K 0K 78643K 9 0 mrt 0 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 236 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 131 79K 89K 78643K 1674 0 UVM aobj 17 2K 2K 78643K 70 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 118 0 NDP 11 0K 0K 78643K 32 0 temp 126 3018K 3090K 78643K 5679 0 kqueue 3 4K 20K 78643K 25 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 arp 64 12 0 10 1 0 1 1 0 8 0 rtpcb 80 37 0 35 1 0 1 1 0 8 0 rtentry 112 79 0 55 2 0 2 2 0 8 0 unpcb 120 425 0 417 2 1 1 2 0 8 0 syncache 264 9 0 9 3 3 0 1 0 8 0 tcpcb 544 227 0 223 1 0 1 1 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 6 0 6 1 1 0 1 0 8 0 inpcb 280 450 0 443 3 2 1 2 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 11 0 11 1 1 0 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 411 0 289 17 8 9 14 0 8 0 art_table 32 412 0 289 2 0 2 2 0 8 0 art_node 16 78 0 56 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 9 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 32 0 22 1 0 1 1 0 8 0 shmpl 112 68 0 53 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1836 0 436 46 0 46 46 0 8 0 ffsino 240 1836 0 436 83 0 83 83 0 8 0 nchpl 144 2608 0 1016 60 0 60 60 0 8 0 uvmvnodes 72 2198 0 0 40 0 40 40 0 8 0 vnodes 208 2198 0 0 116 0 116 116 0 8 0 namei 1024 7577 0 7577 2 2 0 1 0 8 0 vcpupl 1984 5 0 0 1 0 1 1 0 8 0 vmpool 528 5 0 0 1 0 1 1 0 8 0 scxspl 192 8049 0 8049 1 0 1 1 0 8 1 plimitpl 152 38 0 29 1 0 1 1 0 8 0 sigapl 432 493 0 479 2 0 2 2 0 8 0 futexpl 56 8309 0 8309 1 1 0 1 0 8 0 knotepl 112 139 0 116 1 0 1 1 0 8 0 kqueuepl 104 68 0 66 1 0 1 1 0 8 0 pipelkpl 16 159 0 149 1 0 1 1 0 8 0 pipepl 120 318 0 299 2 1 1 2 0 8 0 fdescpl 432 494 0 479 2 0 2 2 0 8 0 filepl 120 3898 0 3803 6 3 3 5 0 8 0 lockfpl 104 105 0 104 1 0 1 1 0 8 0 lockfspl 48 34 0 33 1 0 1 1 0 8 0 sessionpl 112 22 0 10 1 0 1 1 0 8 0 pgrppl 48 24 0 12 1 0 1 1 0 8 0 ucredpl 96 446 0 439 1 0 1 1 0 8 0 zombiepl 144 479 0 475 2 1 1 1 0 8 0 processpl 896 510 0 475 4 0 4 4 0 8 0 procpl 624 858 0 815 4 0 4 4 0 8 0 sosppl 128 8 0 8 1 1 0 1 0 8 0 sockpl 400 924 0 907 5 3 2 5 0 8 0 mcl64k 65536 34 0 34 2 2 0 2 0 8 0 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl12k 12288 7 0 7 1 1 0 1 0 8 0 mcl9k 9216 3 0 3 1 1 0 1 0 8 0 mcl8k 8192 14 0 14 1 1 0 1 0 8 0 mcl4k 4096 56 0 56 2 2 0 1 0 8 0 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 65688 0 65651 10 5 5 10 0 8 0 mtagpl 80 59 0 59 2 2 0 1 0 8 0 mbufpl 256 106861 0 106813 32 27 5 32 0 8 0 bufpl 280 6205 0 797 387 0 387 387 0 8 0 anonpl 16 64066 0 51557 81 1 80 80 0 107 12 amapchunkpl 152 2845 0 2685 21 3 18 20 0 158 10 amappl16 192 2154 0 1282 45 0 45 45 0 8 0 amappl15 184 57 0 52 1 0 1 1 0 8 0 amappl14 176 41 0 36 1 0 1 1 0 8 0 amappl13 168 1 0 0 1 0 1 1 0 8 0 amappl12 160 12 0 11 3 2 1 1 0 8 0 amappl11 152 195 0 184 1 0 1 1 0 8 0 amappl10 144 118 0 114 1 0 1 1 0 8 0 amappl9 136 576 0 571 1 0 1 1 0 8 0 amappl8 128 127 0 105 1 0 1 1 0 8 0 amappl7 120 203 0 188 1 0 1 1 0 8 0 amappl6 112 198 0 193 1 0 1 1 0 8 0 amappl5 104 190 0 178 1 0 1 1 0 8 0 amappl4 96 713 0 684 1 0 1 1 0 8 0 amappl3 88 128 0 121 1 0 1 1 0 8 0 amappl2 80 2981 0 2913 3 1 2 3 0 8 0 amappl1 72 18978 0 18475 27 17 10 20 0 8 0 amappl 80 1118 0 1061 2 0 2 2 0 84 0 dma4096 4096 1 0 1 1 1 0 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 64 69 0 53 1 0 1 1 0 8 0 uaddrrnd 24 499 0 477 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 499 0 477 1 0 1 1 0 8 0 vmmpekpl 168 7373 0 7341 2 0 2 2 0 8 0 vmmpepl 168 68569 0 66475 149 26 123 128 0 357 29 vmsppl 272 498 0 476 2 0 2 2 0 8 0 pdppl 4096 1004 0 957 8 1 7 7 0 8 0 pvpl 32 235960 0 220188 299 17 282 296 0 265 119 pmappl 200 498 0 476 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 176 0 54 5 0 5 5 0 8 0