panic: pool_do_get: pvpl free list modified: page 0xfffffd806a615000; item addr 0xfffffd806a615008; offset 0x0=0x0 != 0x1f89ef6d0d03e405 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *417956 68750 0 0 0x4000000 0 syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8224b0d6) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff825833b0,2,ffff80001f876d68) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff825833b0,2) at pool_get+0xb5 sys/kern/subr_pool.c:581 pmap_enter(fffffd8056b373f0,202e7000,6ad69000,3,21) at pmap_enter+0x160 uvm_fault(fffffd806bc0a990,202e7000,0,1) at uvm_fault+0x108c sys/uvm/uvm_fault.c:1217 pageflttrap(ffff80001f8771e0,0) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 kerntrap(ffff80001f8771e0) at kerntrap+0xdb sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x4b syscall(ffff80001f877530) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3fbcf1b0dc0, count: 3 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 pool_do_get: pvpl free list modified: page 0xfffffd806a615000; item addr 0xfffffd806a615008; offset 0x0=0x0 != 0x1f89ef6d0d03e405 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff8224b0d6) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff825833b0,2,ffff80001f876d68) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff825833b0,2) at pool_get+0xb5 sys/kern/subr_pool.c:581 pmap_enter(fffffd8056b373f0,202e7000,6ad69000,3,21) at pmap_enter+0x160 uvm_fault(fffffd806bc0a990,202e7000,0,1) at uvm_fault+0x108c sys/uvm/uvm_fault.c:1217 pageflttrap(ffff80001f8771e0,0) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 kerntrap(ffff80001f8771e0) at kerntrap+0xdb sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x4b syscall(ffff80001f877530) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x3fbcf1b0dc0, count: -12 ddb> show registers rdi 0 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff80001f876bd0 rbx 0xffff80001f876c80 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800020a11000 rax 0xffff8000009f9680 r8 0xffff80001f876b90 r9 0x1 r10 0xffff8000009f9680 r11 0xe08105a6c6bb6da8 r12 0x3000000008 r13 0xffff80001f876be0 r14 0x100 r15 0x1 rip 0xffffffff8128a2c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001f876bc0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=417956 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff80001d752398,0xffffffff825a8148 process=0xffff8000ffffa740 user=0xffff80001f872000, vmspace=0xfffffd806bc0a990 estcpu=36, cpticks=11, pctcpu=0.0 user=0, sys=11, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 68750 18241 27932 0 2 0 syz-executor.0 *68750 417956 27932 0 7 0x4000000 syz-executor.0 27932 13959 16638 0 2 0x482 syz-executor.0 14821 295417 16638 0 2 0x482 syz-executor.1 23149 328704 0 0 3 0x14200 bored sosplice 16638 523733 99109 0 3 0x82 thrsleep syz-fuzzer 16638 112380 99109 0 3 0x4000082 thrsleep syz-fuzzer 16638 282659 99109 0 3 0x4000082 thrsleep syz-fuzzer 16638 448562 99109 0 3 0x4000082 thrsleep syz-fuzzer 16638 94625 99109 0 3 0x4000082 thrsleep syz-fuzzer 16638 508567 99109 0 3 0x4000082 kqread syz-fuzzer 16638 440876 99109 0 3 0x4000082 thrsleep syz-fuzzer 16638 357094 99109 0 3 0x4000082 thrsleep syz-fuzzer 16638 458739 99109 0 3 0x4000082 thrsleep syz-fuzzer 99109 481431 92463 0 3 0x10008a pause ksh 92463 279208 98569 0 3 0x92 select sshd 33764 368928 1 0 3 0x100083 ttyin getty 98569 416169 1 0 3 0x80 select sshd 71681 286998 18466 73 3 0x100090 kqread syslogd 18466 172135 1 0 3 0x100082 netio syslogd 4095 131007 1 77 3 0x100090 poll dhclient 42670 355301 1 0 3 0x80 poll dhclient 77715 159650 0 0 2 0x14200 smr 72656 334305 0 0 2 0x14200 zerothread 13650 351361 0 0 3 0x14200 aiodoned aiodoned 49967 46035 0 0 3 0x14200 syncer update 68268 320942 0 0 3 0x14200 cleaner cleaner 23875 86930 0 0 3 0x14200 reaper reaper 29612 216952 0 0 3 0x14200 pgdaemon pagedaemon 19827 394229 0 0 3 0x14200 bored crynlk 13689 98585 0 0 3 0x14200 bored crypto 75546 61116 0 0 3 0x40014200 acpi0 acpi0 17295 155542 0 0 3 0x14200 bored softnet 97963 396683 0 0 3 0x14200 bored systqmp 37202 331997 0 0 3 0x14200 bored systq 58218 190646 0 0 2 0x40014200 softclock 65706 474914 0 0 3 0x40014200 idle0 1 378371 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 9534 6491K 6852K 78643K 11689 0 pcb 13 8K 8K 78643K 173 0 rtable 58 10K 11K 78643K 464 0 ifaddr 78 13K 17K 78643K 202 0 counters 21 16K 17K 78643K 37 0 ioctlops 0 0K 2K 78643K 94 0 iov 0 0K 16K 78643K 112 0 mount 1 1K 1K 78643K 1 0 vnodes 1214 76K 77K 78643K 1642 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 14 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 125 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 6 17K 25K 78643K 761 0 sigio 0 0K 0K 78643K 18 0 proc 49 38K 55K 78643K 528 0 subproc 32 2K 2K 78643K 68 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 108 0 in_multi 75 3K 4K 78643K 236 0 ether_multi 1 0K 0K 78643K 42 0 mrt 0 0K 0K 78643K 9 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 67 307K 307K 78643K 67 0 exec 0 0K 1K 78643K 280 0 pfkey data 0 0K 0K 78643K 2 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 128 136K 136K 78643K 2673 0 UVM aobj 35 4K 4K 78643K 51 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 181 0 NDP 15 0K 0K 78643K 41 0 temp 121 3037K 3117K 78643K 25846 0 kqueue 3 4K 16K 78643K 50 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 11 0 9 1 0 1 1 0 8 0 rtpcb 80 75 0 73 1 0 1 1 0 8 0 rtentry 112 81 0 65 2 0 2 2 0 8 0 unpcb 120 471 0 463 1 0 1 1 0 8 0 syncache 264 16 0 16 3 2 1 1 0 8 1 tcpqe 32 28 0 28 1 1 0 1 0 8 0 tcpcb 544 422 0 418 1 0 1 1 0 8 0 ipq 40 6 0 6 3 2 1 1 0 8 1 ipqe 40 62 0 62 3 2 1 1 0 8 1 inpcb 280 2126 0 2118 3 1 2 2 0 8 1 rttmr 72 2 0 2 2 1 1 1 0 8 1 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 6 0 6 1 1 0 1 0 8 0 nd6 48 15 0 14 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 1 1 1 0 8 1 swfcl 56 1 0 0 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 384 0 291 15 4 11 12 0 8 3 art_table 32 386 0 291 2 0 2 2 0 8 0 art_node 16 80 0 68 1 0 1 1 0 8 0 sysvmsgpl 40 38 0 33 1 0 1 1 0 8 0 semapl 112 123 0 113 1 0 1 1 0 8 0 shmpl 112 49 0 16 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2484 0 1086 88 0 88 88 0 8 0 ffsino 240 2484 0 1086 83 0 83 83 0 8 0 nchpl 144 3728 0 2128 60 0 60 60 0 8 0 uvmvnodes 72 2819 0 0 52 0 52 52 0 8 0 vnodes 208 2819 0 0 149 0 149 149 0 8 0 namei 1024 10835 0 10835 1 0 1 1 0 8 1 vcpupl 1984 13 0 0 2 0 2 2 0 8 0 vmpool 528 20 0 7 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 12035 0 12035 1 0 1 1 0 8 1 plimitpl 152 65 0 58 1 0 1 1 0 8 0 sigapl 424 942 0 912 4 0 4 4 0 8 0 futexpl 56 17181 0 17181 1 0 1 1 0 8 1 knotepl 112 164 0 145 1 0 1 1 0 8 0 kqueuepl 144 123 0 120 1 0 1 1 0 8 0 pipelkpl 16 208 0 198 1 0 1 1 0 8 0 pipepl 120 416 0 397 2 1 1 2 0 8 0 fdescpl 432 927 0 912 2 0 2 2 0 8 0 filepl 120 6647 0 6548 4 0 4 4 0 8 0 lockfpl 104 187 0 185 1 0 1 1 0 8 0 lockfspl 48 64 0 62 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 27 0 17 1 0 1 1 0 8 0 ucredpl 96 715 0 708 1 0 1 1 0 8 0 zombiepl 144 913 0 912 1 0 1 1 0 8 0 processpl 920 942 0 912 4 0 4 4 0 8 0 procpl 624 1840 0 1801 4 0 4 4 0 8 0 sosppl 128 12 0 12 5 4 1 1 0 8 1 sockpl 400 2686 0 2668 7 3 4 4 0 8 2 mcl64k 65536 327 0 327 33 10 23 33 0 8 23 mcl16k 16384 7 0 7 2 1 1 1 0 8 1 mcl12k 12288 21 0 21 2 1 1 1 0 8 1 mcl9k 9216 9 0 9 4 3 1 1 0 8 1 mcl8k 8192 24 0 24 1 0 1 1 0 8 1 mcl4k 4096 60 0 60 3 2 1 1 0 8 1 mcl2k2 2112 7 0 7 4 4 0 1 0 8 0 mcl2k 2048 61334 0 61299 17 11 6 14 0 8 1 mtagpl 80 62 0 48 2 1 1 1 0 8 0 mbufpl 256 104728 0 104635 59 42 17 30 0 8 8 bufpl 280 6343 0 951 386 0 386 386 0 8 0 anonpl 16 97772 0 82364 76 2 74 74 0 107 12 amapchunkpl 152 4930 0 4775 30 19 11 20 0 158 4 amappl16 192 4235 0 3347 55 4 51 54 0 8 6 amappl15 184 258 0 256 1 0 1 1 0 8 0 amappl14 176 21 0 17 1 0 1 1 0 8 0 amappl13 168 200 0 196 1 0 1 1 0 8 0 amappl12 160 257 0 255 2 1 1 1 0 8 0 amappl11 152 57 0 47 1 0 1 1 0 8 0 amappl10 144 227 0 222 1 0 1 1 0 8 0 amappl9 136 466 0 463 1 0 1 1 0 8 0 amappl8 128 399 0 377 1 0 1 1 0 8 0 amappl7 120 320 0 309 1 0 1 1 0 8 0 amappl6 112 23 0 18 1 0 1 1 0 8 0 amappl5 104 855 0 843 1 0 1 1 0 8 0 amappl4 96 615 0 581 1 0 1 1 0 8 0 amappl3 88 133 0 128 1 0 1 1 0 8 0 amappl2 80 6745 0 6672 3 1 2 3 0 8 0 amappl1 72 25964 0 25531 26 17 9 20 0 8 0 amappl 80 2126 0 2073 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 50 0 16 1 0 1 1 0 8 0 uaddrrnd 24 947 0 919 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 947 0 919 1 0 1 1 0 8 0 vmmpekpl 168 9295 0 9261 2 0 2 2 0 8 0 vmmpepl 168 115694 0 113599 142 35 107 115 0 357 15 vmsppl 272 946 0 919 2 0 2 2 0 8 0 pdppl 4096 1900 0 1851 9 2 7 7 0 8 0 pvpl 32 290465 0 272079 182 7 175 175 0 265 26 pvpl: pool(0xffffffff825833b0:pvpl): free list modified: page 0xfffffd806a615000; item ordinal 0; addr 0xfffffd806a615008 (p 0xfffffd806a615000); offset 0x0=0x0 pool(pvpl): free list modified: page 0xfffffd806a615000; item ordinal 0; addr 0xfffffd806a615008 (p 0xfffffd806a615000); offset 0x0=0x0 pvpl: pool(0xffffffff825833b0:pvpl): page inconsistency: page 0xfffffd806a615000; item ordinal 1; addr 0x9173a77ba12562df pmappl 200 946 0 919 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 332 0 77 8 0 8 8 0 8 0