uvm_fault(0xfffffd80685d7578, 0x0, 0, 1) -> e kernel: page fault trap, code=0 Stopped at pool_do_get+0x389: movq 0(%rax),%rax TID PID UID PRFLAGS PFLAGS CPU COMMAND *288047 51658 0 0x8000000 0x4000000 0 syz-executor pool_do_get(ffffffff835dcbf0,1,ffff80003782776c) at pool_do_get+0x389 pool_update_curpage sys/kern/subr_pool.c:1057 [inline] pool_do_get(ffffffff835dcbf0,1,ffff80003782776c) at pool_do_get+0x389 sys/kern/subr_pool.c:765 pool_get(ffffffff835dcbf0,1) at pool_get+0xf0 _rw_obj_alloc_flags(fffffd806a9fc9d0,ffffffff8307f6c8,0,0) at _rw_obj_alloc_flags+0x43 amap_alloc(3000,2,0) at amap_alloc+0xcf amap_copy(fffffd80685d7578,fffffd806c23b1c0,2,1,d2391186000,d2391186001) at amap_copy+0x812 sys/uvm/uvm_amap.c:585 uvm_fault_check(ffff800037827ab0,ffff800037827ae8,ffff800037827b10) at uvm_fault_check+0x8d4 uvmfault_amapcopy sys/uvm/uvm_fault.c:250 [inline] uvm_fault_check(ffff800037827ab0,ffff800037827ae8,ffff800037827b10) at uvm_fault_check+0x8d4 sys/uvm/uvm_fault.c:710 uvm_fault(fffffd80685d7578,d2391186000,0,2) at uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 upageflttrap(ffff800037827c30,d2391186000) at upageflttrap+0xa0 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800037827c30) at usertrap+0x2bc sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xd234073f270, count: 5 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(0xfffffd80685d7578, 0x0, 0, 1) -> e ddb> trace pool_do_get(ffffffff835dcbf0,1,ffff80003782776c) at pool_do_get+0x389 pool_update_curpage sys/kern/subr_pool.c:1057 [inline] pool_do_get(ffffffff835dcbf0,1,ffff80003782776c) at pool_do_get+0x389 sys/kern/subr_pool.c:765 pool_get(ffffffff835dcbf0,1) at pool_get+0xf0 _rw_obj_alloc_flags(fffffd806a9fc9d0,ffffffff8307f6c8,0,0) at _rw_obj_alloc_flags+0x43 amap_alloc(3000,2,0) at amap_alloc+0xcf amap_copy(fffffd80685d7578,fffffd806c23b1c0,2,1,d2391186000,d2391186001) at amap_copy+0x812 sys/uvm/uvm_amap.c:585 uvm_fault_check(ffff800037827ab0,ffff800037827ae8,ffff800037827b10) at uvm_fault_check+0x8d4 uvmfault_amapcopy sys/uvm/uvm_fault.c:250 [inline] uvm_fault_check(ffff800037827ab0,ffff800037827ae8,ffff800037827b10) at uvm_fault_check+0x8d4 sys/uvm/uvm_fault.c:710 uvm_fault(fffffd80685d7578,d2391186000,0,2) at uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 upageflttrap(ffff800037827c30,d2391186000) at upageflttrap+0xa0 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800037827c30) at usertrap+0x2bc sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xd234073f270, count: -10 ddb> show registers rdi 0xa6 rsi 0xfffffd8078d1af98 rbp 0xffff800037827710 rbx 0xfffffd8070ab8f90 rdx 0xffffffff835dcc38 rwlock_obj_pool+0x48 rcx 0xffffffff835dcc30 rwlock_obj_pool+0x40 rax 0 r8 0x60 r9 0xd2391186001 r10 0x157600e709631cc6 r11 0xd4c773e11941b295 r12 0xa6 r13 0xa6 r14 0xffffffff835dcbf0 rwlock_obj_pool r15 0x8 rip 0xffffffff81358919 pool_do_get+0x389 cs 0x8 rflags 0x10286 __ALIGN_SIZE+0xf286 rsp 0xffff800037827690 ss 0 pool_do_get+0x389: movq 0(%rax),%rax ddb> show proc PROC (syz-executor) tid=288047 pid=51658 tcnt=2 stat=onproc flags process=8000000 proc=4000000 runpri=50, usrpri=50, slppri=17, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff800037666a48,0xffffffff835818d0 process=0xffff80002a4e2cd0 user=0xffff800037822000, vmspace=0xfffffd80685d7578 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 51658 463674 63133 0 2 0x8000000 syz-executor *51658 288047 63133 0 7 0xc000000 syz-executor 68369 468692 53118 0 3 0xc081000 inode syz-executor 68369 341747 53118 0 3 0xc081000 inode syz-executor 68369 194047 53118 0 3 0xc003000 suspend syz-executor 15631 135621 29719 0 2 0x8000000 syz-executor 15631 92345 29719 0 3 0xc000080 pipewr syz-executor 2950 63961 16547 0 2 0x8000000 syz-executor 2950 84935 16547 0 2 0xc000000 syz-executor 2950 83526 16547 0 3 0xc000080 fsleep syz-executor 44085 421913 23411 0 3 0x8000080 nanoslp syz-executor 44085 42726 23411 0 3 0xc000080 ttyin syz-executor 44085 508279 23411 0 3 0xc000080 fsleep syz-executor 49866 21117 17503 0 2 0x8000000 syz-executor 49866 458970 17503 0 3 0xc000080 fsleep syz-executor 49866 44488 17503 0 3 0xc000080 fsleep syz-executor 58583 111889 40126 0 2 0x8000000 syz-executor 58583 224720 40126 0 3 0xc000080 fsleep syz-executor 92498 472016 55797 0 2 0x8000000 syz-executor 92498 185434 55797 0 3 0xc000000 biowait syz-executor 17204 95289 1 0 3 0x18100083 ttyin getty 55797 454174 63040 0 3 0x8000082 nanoslp syz-executor 17503 170165 63040 0 3 0x8000082 nanoslp syz-executor 29719 320406 63040 0 3 0x8000082 nanoslp syz-executor 23411 278382 63040 0 3 0x8000082 nanoslp syz-executor 63133 86798 63040 0 3 0x8000082 nanoslp syz-executor 53118 161203 63040 0 3 0x8000082 nanoslp syz-executor 16547 93836 63040 0 3 0x8000082 nanoslp syz-executor 40126 319688 63040 0 3 0x8000082 nanoslp syz-executor 92001 109971 0 0 3 0x14200 bored sosplice 34057 375189 0 0 3 0x14280 nfsidl nfsio 83682 84325 0 0 3 0x14280 nfsidl nfsio 35391 86427 0 0 3 0x14280 nfsidl nfsio 48208 301407 0 0 3 0x14280 nfsidl nfsio 61592 140677 0 0 3 0x14280 nfsidl nfsio 96124 51373 0 0 3 0x14280 nfsidl nfsio 33769 437933 0 0 3 0x14280 nfsidl nfsio 14829 54741 0 0 3 0x14280 nfsidl nfsio 83766 208959 0 0 3 0x14280 nfsidl nfsio 65102 228816 0 0 3 0x14280 nfsidl nfsio 55946 389209 0 0 3 0x14280 nfsidl nfsio 5681 403622 0 0 3 0x14280 nfsidl nfsio 38042 431224 0 0 3 0x14280 nfsidl nfsio 4565 195577 0 0 3 0x14280 nfsidl nfsio 49923 265835 0 0 3 0x14280 nfsidl nfsio 95802 122337 0 0 3 0x14280 nfsidl nfsio 35635 328624 0 0 3 0x14280 nfsidl nfsio 95707 154033 0 0 3 0x14280 nfsidl nfsio 52584 255914 0 0 3 0x14280 nfsidl nfsio 56048 144379 0 0 3 0x14280 nfsidl nfsio 63040 139717 78161 0 3 0x8000082 kqread syz-executor 78161 59045 2783 0 3 0x810008a sigsusp ksh 2783 411275 51737 0 3 0x18000098 kqread sshd-session 51737 31354 81288 0 3 0x18000092 kqread sshd-session 81288 87610 1 0 3 0x18000088 kqread sshd 44936 134353 89368 73 3 0x19100090 kqread syslogd 89368 238824 1 0 3 0x18100082 sbwait syslogd 94382 450917 1 0 3 0x18100080 kqread resolvd 43476 389527 63975 77 3 0x18100092 kqread dhcpleased 92577 325398 63975 77 3 0x18100092 kqread dhcpleased 63975 47241 1 0 3 0x18000080 kqread dhcpleased 57658 261107 0 0 3 0x14200 bored smr 64248 164785 0 0 2 0x14200 zerothread 21135 499970 0 0 3 0x14200 aiodoned aiodoned 6776 222560 0 0 3 0x14200 syncer update 73868 268547 0 0 3 0x14200 cleaner cleaner 30505 68410 0 0 3 0x14200 reaper reaper 36306 262858 0 0 3 0x14200 pgdaemon pagedaemon 61918 155311 0 0 3 0x14200 bored viomb 56765 411153 0 0 3 0x40014200 acpi0 acpi0 53178 243898 0 0 3 0x14200 bored softnet3 69795 436030 0 0 3 0x14200 bored softnet2 18038 299604 0 0 3 0x14200 bored softnet1 45213 53190 0 0 3 0x14200 bored softnet0 17591 474877 0 0 3 0x14200 bored systqmp 38016 206111 0 0 3 0x14200 bored systq 25485 229037 0 0 3 0x40014200 tmoslp softclock 22184 76190 0 0 3 0x40014200 idle0 1 392123 0 0 3 0x8000082 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 10177 10089K 10613K 166960K 12846 0 pcb 17 18K 21K 166960K 391 0 rtable 173 7K 8K 166960K 1421 0 pf 29 8K 12K 166960K 127 0 ifaddr 36 10K 11K 166960K 188 0 ifgroup 50 2K 2K 166960K 206 0 counters 30 17K 17K 166960K 71 0 ioctlops 0 0K 4K 166960K 118 0 iov 0 0K 16K 166960K 83 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1469 92K 93K 166960K 2491 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 19 0 VM map 2 1K 1K 166960K 2 0 sem 24 3K 3K 166960K 34 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1697 195K 286K 166960K 12548 0 file desc 18 65K 97K 166960K 1189 0 sigio 3 0K 0K 166960K 65 0 proc 58 59K 124K 166960K 1430 0 subproc 104 6K 6K 166960K 523 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 111 0 in_multi 76 5K 7K 166960K 475 0 ether_multi 1 0K 0K 166960K 3 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 882 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 242 79K 94K 166960K 10626 0 UVM aobj 57 4K 4K 166960K 62 0 pinsyscall 39 78K 102K 166960K 3038 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 35 0 NDP 11 0K 2K 166960K 133 0 temp 76 6808K 6936K 166960K 22561 0 kqueue 13 20K 28K 166960K 127 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 246 0 243 3 0 3 3 0 8 2 rtentry 112 491 0 416 4 0 4 4 0 8 1 unpcb 144 1117 0 966 6 0 6 6 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 808 456 0 452 8 0 8 8 0 8 7 arp 88 89 0 75 1 0 1 1 0 8 0 ipq 40 3 0 2 1 0 1 1 0 8 0 ipqe 40 4 0 3 1 0 1 1 0 8 0 inpcb 352 1660 0 1651 13 4 9 12 0 8 7 nd6 104 128 0 108 1 0 1 1 0 8 0 pkpcb 40 7 0 7 1 0 1 1 0 8 1 kcovpl 48 40 0 32 1 0 1 1 0 8 0 ppxss 1072 5 0 5 1 0 1 1 0 8 1 pfosfp 40 1 0 0 1 0 1 1 0 8 0 pfosfpen 112 1 0 0 1 0 1 1 0 8 0 pfanchor 1288 1 0 0 1 0 1 1 0 8 0 pftag 88 3 0 2 1 0 1 1 0 8 0 pfrule 1344 7 0 5 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1966 0 1617 30 0 30 30 0 8 4 art_table 32 1967 0 1617 4 0 4 4 0 8 0 art_node 16 489 0 425 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 2 1 0 1 1 0 8 0 semupl 112 5 0 5 1 0 1 1 0 8 1 semapl 112 26 0 4 1 0 1 1 0 8 0 shmpl 112 59 0 5 2 0 2 2 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 2814 0 1250 99 0 99 99 0 8 0 ffsino 240 2814 0 1250 93 0 93 93 0 8 0 nchpl 144 3979 0 3411 65 33 32 65 0 8 8 uvmvnodes 80 3787 0 0 78 0 78 78 0 8 0 vnodes 216 3787 0 0 211 0 211 211 0 8 0 namei 1024 17707 0 17705 2 0 2 2 0 8 1 vcpupl 3904 8 0 1 1 0 1 1 0 8 0 vmpool 664 12 0 5 1 0 1 1 0 8 0 kstatmem 264 104 0 82 2 0 2 2 0 8 0 scxspl 216 22082 0 22081 8 0 8 8 1 8 7 plimitpl 152 200 0 182 1 0 1 1 0 8 0 sigapl 424 1426 0 1359 8 0 8 8 0 8 0 futexpl 64 13775 0 13770 1 0 1 1 0 8 0 knotepl 120 24671 0 24624 10 0 10 10 0 8 8 kqueuepl 184 427 0 418 6 0 6 6 0 8 5 pipepl 288 425 0 363 5 0 5 5 0 8 0 fdescpl 432 1387 0 1357 5 0 5 5 0 8 1 filepl 120 10207 0 9743 15 0 15 15 0 8 0 lockfpl 104 393 0 389 2 0 2 2 0 8 1 lockfspl 48 124 0 120 1 0 1 1 0 8 0 sessionpl 144 54 0 46 1 0 1 1 0 8 0 pgrppl 48 112 0 96 1 0 1 1 0 8 0 ucredpl 104 1129 0 1117 1 0 1 1 0 8 0 zombiepl 144 1360 0 1359 1 0 1 1 0 8 0 processpl 1088 1426 0 1359 5 0 5 5 0 8 0 procpl 648 2397 0 2317 8 0 8 8 0 8 1 sosppl 168 3 0 3 1 0 1 1 0 8 1 sockpl 504 3034 0 2871 51 30 21 21 0 8 0 mcl64k 65536 10 0 10 1 0 1 1 0 8 1 mcl16k 16384 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 27 0 27 1 0 1 1 0 8 1 mcl4k 4096 13 0 13 1 0 1 1 0 8 1 mcl2k 2048 7423 0 7324 26 5 21 26 0 8 7 mtagpl 96 120 0 44 2 0 2 2 0 8 0 mbufpl 256 18350 0 18077 73 44 29 70 0 8 8 bufpl 280 7660 0 1134 467 0 467 467 0 8 0 anonpl 24 242119 0 238646 79 0 79 79 0 187 52 amapchunkpl 152 34315 0 33606 42 0 42 42 0 158 14 amappl16 200 4868 0 4826 19 8 11 14 0 8 8 amappl15 192 9 0 8 1 0 1 1 0 8 0 amappl14 184 173 0 163 1 0 1 1 0 8 0 amappl13 176 8 0 8 1 0 1 1 0 8 1 amappl12 168 2505 0 2474 3 0 3 3 0 8 1 amappl11 160 51 0 41 1 0 1 1 0 8 0 amappl10 152 6 0 6 1 0 1 1 0 8 1 amappl9 144 150 0 150 1 0 1 1 0 8 1 amappl8 136 24 0 23 1 0 1 1 0 8 0 amappl7 128 160 0 149 1 0 1 1 0 8 0 amappl6 120 484 0 483 1 0 1 1 0 8 0 amappl5 112 254 0 246 1 0 1 1 0 8 0 amappl4 104 389 0 373 1 0 1 1 0 8 0 amappl3 96 6645 0 6522 4 0 4 4 0 8 0 amappl2 88 1039 0 981 2 0 2 2 0 8 0 amappl1 80 12596 0 12059 14 0 14 14 0 8 2 amappl 88 10005 0 9823 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 253 0 253 1 0 1 1 0 8 1 dma64 64 6 0 6 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 18 0 17 1 0 1 1 0 8 0 aobjpl 72 61 0 5 2 0 2 2 0 8 0 uaddrrnd 24 1399 0 1362 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1399 0 1362 1 0 1 1 0 8 0 vmmpekpl 168 13372 0 13320 3 0 3 3 0 8 0 vmmpepl 168 91626 0 89779 90 0 90 90 0 357 9 vmsppl 344 1398 0 1362 4 0 4 4 0 8 0 rwobjpl 24 31819 0 27080 29 0 29 29 0 8 0 rwobjpl: pool(0xffffffff835dcbf0:rwobjpl): page inconsistency: page 0x0; at page head addr 0xfffffd807e032f90 (p 0xfffffd807e032000) pdppl 4096 2804 0 2731 155 81 74 82 0 8 1 pvpl 32 702623 0 692545 353 15 338 353 0 265 249 pmappl 216 1398 0 1362 3 0 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 559 0 160 13 0 13 13 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace pool_do_get(ffffffff835dcbf0,1,ffff80003782776c) at pool_do_get+0x389 pool_update_curpage sys/kern/subr_pool.c:1057 [inline] pool_do_get(ffffffff835dcbf0,1,ffff80003782776c) at pool_do_get+0x389 sys/kern/subr_pool.c:765 pool_get(ffffffff835dcbf0,1) at pool_get+0xf0 _rw_obj_alloc_flags(fffffd806a9fc9d0,ffffffff8307f6c8,0,0) at _rw_obj_alloc_flags+0x43 amap_alloc(3000,2,0) at amap_alloc+0xcf amap_copy(fffffd80685d7578,fffffd806c23b1c0,2,1,d2391186000,d2391186001) at amap_copy+0x812 sys/uvm/uvm_amap.c:585 uvm_fault_check(ffff800037827ab0,ffff800037827ae8,ffff800037827b10) at uvm_fault_check+0x8d4 uvmfault_amapcopy sys/uvm/uvm_fault.c:250 [inline] uvm_fault_check(ffff800037827ab0,ffff800037827ae8,ffff800037827b10) at uvm_fault_check+0x8d4 sys/uvm/uvm_fault.c:710 uvm_fault(fffffd80685d7578,d2391186000,0,2) at uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 upageflttrap(ffff800037827c30,d2391186000) at upageflttrap+0xa0 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800037827c30) at usertrap+0x2bc sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xd234073f270, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace pool_do_get(ffffffff835dcbf0,1,ffff80003782776c) at pool_do_get+0x389 pool_update_curpage sys/kern/subr_pool.c:1057 [inline] pool_do_get(ffffffff835dcbf0,1,ffff80003782776c) at pool_do_get+0x389 sys/kern/subr_pool.c:765 pool_get(ffffffff835dcbf0,1) at pool_get+0xf0 _rw_obj_alloc_flags(fffffd806a9fc9d0,ffffffff8307f6c8,0,0) at _rw_obj_alloc_flags+0x43 amap_alloc(3000,2,0) at amap_alloc+0xcf amap_copy(fffffd80685d7578,fffffd806c23b1c0,2,1,d2391186000,d2391186001) at amap_copy+0x812 sys/uvm/uvm_amap.c:585 uvm_fault_check(ffff800037827ab0,ffff800037827ae8,ffff800037827b10) at uvm_fault_check+0x8d4 uvmfault_amapcopy sys/uvm/uvm_fault.c:250 [inline] uvm_fault_check(ffff800037827ab0,ffff800037827ae8,ffff800037827b10) at uvm_fault_check+0x8d4 sys/uvm/uvm_fault.c:710 uvm_fault(fffffd80685d7578,d2391186000,0,2) at uvm_fault+0xf2 sys/uvm/uvm_fault.c:600 upageflttrap(ffff800037827c30,d2391186000) at upageflttrap+0xa0 sys/arch/amd64/amd64/trap.c:188 usertrap(ffff800037827c30) at usertrap+0x2bc sys/arch/amd64/amd64/trap.c:436 recall_trap() at recall_trap+0x8 end of kernel end trace frame: 0xd234073f270, count: -10