panic: pool_do_get: vcpupl free list modified: page 0xffff80001f5c0000; item addr 0xffff80001f5c0000; offset 0x0=0x0 != 0x94f4668a5541078a Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *132863 47497 0 0 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82453010) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff827f9688,9,ffff8000205e11c8) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff827f9688,9) at pool_get+0xb5 sys/kern/subr_pool.c:581 vm_create(ffff800000b1e000,ffff80001d6c1c50) at vm_create+0x266 sys/arch/amd64/amd64/vmm.c:1480 VOP_IOCTL(fffffd805d711000,c5005601,ffff800000b1e000,1,fffffd806c3bfb40,ffff80001d6c1c50) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290 vn_ioctl(fffffd805d87bf08,c5005601,ffff800000b1e000,ffff80001d6c1c50) at vn_ioctl+0xb5 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80001d6c1c50,ffff8000205e1558,ffff8000205e15a0) at sys_ioctl+0x4a1 syscall(ffff8000205e1620) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x60eb4f4360, 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 pool_do_get: vcpupl free list modified: page 0xffff80001f5c0000; item addr 0xffff80001f5c0000; offset 0x0=0x0 != 0x94f4668a5541078a ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82453010) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff827f9688,9,ffff8000205e11c8) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff827f9688,9) at pool_get+0xb5 sys/kern/subr_pool.c:581 vm_create(ffff800000b1e000,ffff80001d6c1c50) at vm_create+0x266 sys/arch/amd64/amd64/vmm.c:1480 VOP_IOCTL(fffffd805d711000,c5005601,ffff800000b1e000,1,fffffd806c3bfb40,ffff80001d6c1c50) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290 vn_ioctl(fffffd805d87bf08,c5005601,ffff800000b1e000,ffff80001d6c1c50) at vn_ioctl+0xb5 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80001d6c1c50,ffff8000205e1558,ffff8000205e15a0) at sys_ioctl+0x4a1 syscall(ffff8000205e1620) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x60eb4f4360, count: -10 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff8000205e1030 rbx 0xffff8000205e10e0 rdx 0x2 rcx 0 rax 0x1 r8 0xffffffff81ad22df kprintf+0x15f r9 0x1 r10 0x2 r11 0x19c7112817647916 r12 0x3000000008 r13 0xffff8000205e1040 r14 0x100 r15 0x1 rip 0xffffffff81897608 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000205e1020 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=132863 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6c2880,0xffffffff827ca1d0 process=0xffff8000ffffb208 user=0xffff8000205dc000, vmspace=0xfffffd8057723780 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 47497 490403 9934 0 2 0 syz-executor.1 *47497 132863 9934 0 7 0x4000000 syz-executor.1 9934 100054 16547 0 3 0x82 nanosleep syz-executor.1 2506 55374 16547 0 3 0x82 piperd syz-executor.0 77051 432123 0 0 3 0x14200 bored sosplice 16547 459069 6184 0 3 0x82 thrsleep syz-fuzzer 16547 264049 6184 0 3 0x4000082 nanosleep syz-fuzzer 16547 521312 6184 0 3 0x4000082 thrsleep syz-fuzzer 16547 72497 6184 0 3 0x4000082 thrsleep syz-fuzzer 16547 466964 6184 0 3 0x4000082 thrsleep syz-fuzzer 16547 359643 6184 0 3 0x4000082 thrsleep syz-fuzzer 16547 8854 6184 0 3 0x4000082 thrsleep syz-fuzzer 16547 12284 6184 0 2 0x4000002 syz-fuzzer 6184 256896 47060 0 3 0x10008a pause ksh 47060 277266 75013 0 3 0x92 select sshd 69691 445504 1 0 3 0x100083 ttyin getty 75013 177544 1 0 3 0x80 select sshd 31459 314835 66268 73 3 0x100090 kqread syslogd 66268 475297 1 0 3 0x100082 netio syslogd 67434 132631 1 77 3 0x100090 poll dhclient 2936 193358 1 0 3 0x80 poll dhclient 21707 488874 0 0 3 0x14200 bored smr 83303 159769 0 0 2 0x14200 zerothread 99969 23413 0 0 3 0x14200 aiodoned aiodoned 58038 511063 0 0 3 0x14200 syncer update 84278 109994 0 0 3 0x14200 cleaner cleaner 7008 203189 0 0 3 0x14200 reaper reaper 37901 367511 0 0 3 0x14200 pgdaemon pagedaemon 37471 406262 0 0 3 0x14200 bored crynlk 54658 289345 0 0 3 0x14200 bored crypto 7693 246808 0 0 3 0x40014200 acpi0 acpi0 66094 264728 0 0 3 0x14200 bored softnet 97878 329275 0 0 3 0x14200 bored systqmp 1979 421758 0 0 3 0x14200 bored systq 59013 410804 0 0 3 0x40014200 bored softclock 72789 214079 0 0 3 0x40014200 idle0 1 49763 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 6364K 6982K 78643K 11682 0 pcb 13 8K 8K 78643K 190 0 rtable 127 10K 13K 78643K 1362 0 ifaddr 99 19K 19K 78643K 304 0 counters 21 16K 16K 78643K 37 0 ioctlops 1 2K 4K 78643K 151 0 iov 0 0K 24K 78643K 198 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1623 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 9 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 115 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 761 0 sigio 0 0K 0K 78643K 6 0 proc 52 38K 55K 78643K 487 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 75 0 in_multi 61 3K 3K 78643K 180 0 ether_multi 1 0K 0K 78643K 26 0 mrt 0 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 278 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 138 72K 72K 78643K 2757 0 UVM aobj 26 2K 3K 78643K 36 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 155 0 NDP 16 0K 0K 78643K 45 0 temp 143 3865K 4182K 78643K 18712 0 kqueue 3 4K 10K 78643K 45 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 4 1 0 1 1 0 8 0 rtpcb 80 616 0 613 1 0 1 1 0 8 0 rtentry 112 92 0 54 2 0 2 2 0 8 0 unpcb 120 275 0 267 1 0 1 1 0 8 0 syncache 264 8 0 8 3 3 0 1 0 8 0 tcpqe 32 49 0 49 3 3 0 1 0 8 0 tcpcb 544 300 0 296 2 1 1 2 0 8 0 inpcb 280 864 0 857 6 5 1 2 0 8 0 rttmr 72 1 0 1 1 1 0 1 0 8 0 nd6 48 18 0 12 1 0 1 1 0 8 0 pkpcb 40 4 0 4 1 1 0 1 0 8 0 ppxss 1128 2 0 2 2 2 0 1 0 8 0 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pfrktable 1344 219 0 205 6 4 2 2 0 8 0 pftag 88 28 0 24 4 3 1 1 0 8 0 pfstitem 24 6 0 0 1 0 1 1 0 8 0 pfstkey 112 8 0 2 1 0 1 1 0 8 0 pfstate 328 4 0 1 1 0 1 1 0 8 0 pfrule 1360 46 0 30 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 425 0 264 17 5 12 14 0 8 0 art_table 32 426 0 264 2 0 2 2 0 8 0 art_node 16 91 0 59 1 0 1 1 0 8 0 sysvmsgpl 40 27 0 11 2 1 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 109 0 99 1 0 1 1 0 8 0 shmpl 112 34 0 10 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2476 0 1083 88 0 88 88 0 8 0 ffsino 240 2476 0 1083 83 0 83 83 0 8 0 nchpl 144 3806 0 2219 60 0 60 60 0 8 0 uvmvnodes 72 2790 0 0 51 0 51 51 0 8 0 vnodes 208 2790 0 0 147 0 147 147 0 8 0 namei 1024 10837 0 10837 3 2 1 1 0 8 1 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vcpupl: pool(0xffffffff827f9688:vcpupl): free list modified: page 0xffff80001f5c0000; item ordinal 0; addr 0xffff80001f5c0000 (p 0xffff80001f5c0000); offset 0x0=0x0 pool(vcpupl): free list modified: page 0xffff80001f5c0000; item ordinal 0; addr 0xffff80001f5c0000 (p 0xffff80001f5c0000); offset 0x0=0x0 vcpupl: pool(0xffffffff827f9688:vcpupl): page inconsistency: page 0xffff80001f5c0000; item ordinal 1; addr 0x10b052378412450e vmpool 528 10 0 6 1 0 1 1 0 8 0 pfiaddrpl 120 87 0 69 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 11489 0 11489 7 6 1 1 0 8 1 plimitpl 152 59 0 52 1 0 1 1 0 8 0 sigapl 424 942 0 913 4 0 4 4 0 8 0 futexpl 56 15376 0 15376 2 1 1 1 0 8 1 knotepl 112 137 0 118 1 0 1 1 0 8 0 kqueuepl 144 106 0 104 1 0 1 1 0 8 0 pipelkpl 16 321 0 311 1 0 1 1 0 8 0 pipepl 120 642 0 623 1 0 1 1 0 8 0 fdescpl 432 927 0 913 2 0 2 2 0 8 0 filepl 120 6320 0 6223 6 2 4 4 0 8 1 lockfpl 104 298 0 297 1 0 1 1 0 8 0 lockfspl 48 91 0 90 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 29 0 19 1 0 1 1 0 8 0 ucredpl 96 773 0 766 1 0 1 1 0 8 0 zombiepl 144 913 0 913 3 2 1 1 0 8 1 processpl 920 942 0 913 4 0 4 4 0 8 0 procpl 624 1923 0 1886 5 1 4 4 0 8 0 sosppl 128 6 0 6 2 2 0 1 0 8 0 sockpl 400 1761 0 1743 8 5 3 4 0 8 1 mcl64k 65536 79 0 79 7 6 1 1 0 8 1 mcl16k 16384 8 0 8 4 4 0 1 0 8 0 mcl12k 12288 14 0 14 7 7 0 1 0 8 0 mcl9k 9216 14 0 14 8 7 1 1 0 8 1 mcl8k 8192 30 0 30 8 8 0 1 0 8 0 mcl4k 4096 81 0 81 9 8 1 1 0 8 1 mcl2k2 2112 6 0 6 6 6 0 1 0 8 0 mcl2k 2048 74952 0 74901 18 11 7 13 0 8 0 mtagpl 80 80 0 58 2 1 1 1 0 8 0 mbufpl 256 125322 0 125189 33 22 11 29 0 8 0 bufpl 280 4991 0 128 348 0 348 348 0 8 0 anonpl 16 102982 0 86844 84 18 66 79 0 107 0 amapchunkpl 152 5115 0 4982 31 24 7 19 0 158 0 amappl16 192 4641 0 3747 56 11 45 54 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 56 0 51 1 0 1 1 0 8 0 amappl13 168 246 0 243 1 0 1 1 0 8 0 amappl12 160 37 0 34 2 1 1 1 0 8 0 amappl11 152 57 0 47 1 0 1 1 0 8 0 amappl10 144 273 0 269 1 0 1 1 0 8 0 amappl9 136 349 0 348 1 0 1 1 0 8 0 amappl8 128 382 0 335 2 0 2 2 0 8 0 amappl7 120 128 0 114 1 0 1 1 0 8 0 amappl6 112 32 0 22 1 0 1 1 0 8 0 amappl5 104 887 0 875 1 0 1 1 0 8 0 amappl4 96 654 0 626 1 0 1 1 0 8 0 amappl3 88 124 0 119 1 0 1 1 0 8 0 amappl2 80 6334 0 6267 2 0 2 2 0 8 0 amappl1 72 26399 0 25990 23 13 10 17 0 8 0 amappl 80 2190 0 2145 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 35 0 10 1 0 1 1 0 8 0 uaddrrnd 24 937 0 919 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 937 0 919 1 0 1 1 0 8 0 vmmpekpl 168 9751 0 9721 2 0 2 2 0 8 0 vmmpepl 168 115182 0 113198 179 89 90 125 0 357 0 vmsppl 272 936 0 919 3 1 2 2 0 8 0 pdppl 4096 1880 0 1842 7 2 5 6 0 8 0 pvpl 32 296327 0 277204 199 40 159 187 0 265 3 pmappl 200 936 0 919 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 303 0 78 8 1 7 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82453010) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff827f9688,9,ffff8000205e11c8) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff827f9688,9) at pool_get+0xb5 sys/kern/subr_pool.c:581 vm_create(ffff800000b1e000,ffff80001d6c1c50) at vm_create+0x266 sys/arch/amd64/amd64/vmm.c:1480 VOP_IOCTL(fffffd805d711000,c5005601,ffff800000b1e000,1,fffffd806c3bfb40,ffff80001d6c1c50) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290 vn_ioctl(fffffd805d87bf08,c5005601,ffff800000b1e000,ffff80001d6c1c50) at vn_ioctl+0xb5 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80001d6c1c50,ffff8000205e1558,ffff8000205e15a0) at sys_ioctl+0x4a1 syscall(ffff8000205e1620) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x60eb4f4360, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82453010) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff827f9688,9,ffff8000205e11c8) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff827f9688,9) at pool_get+0xb5 sys/kern/subr_pool.c:581 vm_create(ffff800000b1e000,ffff80001d6c1c50) at vm_create+0x266 sys/arch/amd64/amd64/vmm.c:1480 VOP_IOCTL(fffffd805d711000,c5005601,ffff800000b1e000,1,fffffd806c3bfb40,ffff80001d6c1c50) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:290 vn_ioctl(fffffd805d87bf08,c5005601,ffff800000b1e000,ffff80001d6c1c50) at vn_ioctl+0xb5 sys/kern/vfs_vnops.c:531 sys_ioctl(ffff80001d6c1c50,ffff8000205e1558,ffff8000205e15a0) at sys_ioctl+0x4a1 syscall(ffff8000205e1620) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x60eb4f4360, count: -10