panic: pool_do_get: pvpl free list modified: page 0xfffffd805611c000; item addr 0xfffffd805611c000; offset 0x0=0x0 != 0xf1e3c4714062182f Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *438954 32424 0 0 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff822475e0) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff8256e4e0,2,ffff80001e447ec8) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff8256e4e0,2) at pool_get+0xb5 sys/kern/subr_pool.c:581 pmap_enter(fffffd806bc09a28,20069000,560e8000,3,21) at pmap_enter+0x160 uvm_fault(fffffd805c730778,20069000,0,1) at uvm_fault+0x108c sys/uvm/uvm_fault.c:1217 pageflttrap(ffff80001e448340,0) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 kerntrap(ffff80001e448340) at kerntrap+0xdb sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x4b ffs_write(ffff80001e448540) at ffs_write+0x618 sys/ufs/ffs/ffs_vnops.c:363 VOP_WRITE(fffffd80527c1358,ffff80001e4486e8,15,fffffd806c3bfba0) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 vn_write(fffffd806592d900,ffff80001e4486e8,0) at vn_write+0x149 sys/kern/vfs_vnops.c:414 dofilewritev(ffff80001d35d288,5,ffff80001e4486e8,0,ffff80001e4487d0) at dofilewritev+0x1ab sys/kern/sys_generic.c:365 end trace frame: 0xffff80001e448770, count: 0 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 0xfffffd805611c000; item addr 0xfffffd805611c000; offset 0x0=0x0 != 0xf1e3c4714062182f ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff822475e0) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff8256e4e0,2,ffff80001e447ec8) at pool_do_get+0x42a sys/kern/subr_pool.c:738 pool_get(ffffffff8256e4e0,2) at pool_get+0xb5 sys/kern/subr_pool.c:581 pmap_enter(fffffd806bc09a28,20069000,560e8000,3,21) at pmap_enter+0x160 uvm_fault(fffffd805c730778,20069000,0,1) at uvm_fault+0x108c sys/uvm/uvm_fault.c:1217 pageflttrap(ffff80001e448340,0) at pageflttrap+0x156 sys/arch/amd64/amd64/trap.c:221 kerntrap(ffff80001e448340) at kerntrap+0xdb sys/arch/amd64/amd64/trap.c:302 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b copyin() at copyin+0x4b ffs_write(ffff80001e448540) at ffs_write+0x618 sys/ufs/ffs/ffs_vnops.c:363 VOP_WRITE(fffffd80527c1358,ffff80001e4486e8,15,fffffd806c3bfba0) at VOP_WRITE+0xc6 sys/kern/vfs_vops.c:268 vn_write(fffffd806592d900,ffff80001e4486e8,0) at vn_write+0x149 sys/kern/vfs_vnops.c:414 dofilewritev(ffff80001d35d288,5,ffff80001e4486e8,0,ffff80001e4487d0) at dofilewritev+0x1ab sys/kern/sys_generic.c:365 sys_write(ffff80001d35d288,ffff80001e448788,ffff80001e4487d0) at sys_write+0x83 sys/kern/sys_generic.c:285 syscall(ffff80001e448850) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xa6c66d97630, count: -17 ddb> show registers rdi 0xffffffff81a40ae7 db_enter+0x17 rsi 0x13077 __ALIGN_SIZE+0x12077 rbp 0xffff80001e447d30 rbx 0xffff80001e447de0 rdx 0x13078 __ALIGN_SIZE+0x12078 rcx 0xffff80001f617000 rax 0xffff80001f617000 r8 0xffff80001e447cf0 r9 0x1 r10 0xffff8000009f48c0 r11 0x66992c7bd163cb5e r12 0x3000000008 r13 0xffff80001e447d40 r14 0x100 r15 0x1 rip 0xffffffff81a40ae8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001e447d20 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=438954 stat=onproc flags process=0 proc=4000000 pri=17, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff80001d35d768,0xffff80001d35dc58 process=0xffff8000ffffb190 user=0xffff80001e443000, vmspace=0xfffffd805c730778 estcpu=24, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 73864 92932 88707 0 2 0 syz-executor.0 73864 473159 88707 0 2 0x4000000 syz-executor.0 32424 336578 23509 0 2 0 syz-executor.1 *32424 438954 23509 0 7 0x4000000 syz-executor.1 32424 317933 23509 0 3 0x4000000 inode syz-executor.1 4577 406382 0 0 3 0x14200 bored sosplice 23509 29951 64388 0 3 0x82 nanosleep syz-executor.1 88707 437631 64388 0 3 0x82 nanosleep syz-executor.0 64388 445370 6720 0 3 0x82 thrsleep syz-fuzzer 64388 477229 6720 0 3 0x4000082 nanosleep syz-fuzzer 64388 12981 6720 0 3 0x4000082 thrsleep syz-fuzzer 64388 193086 6720 0 3 0x4000082 thrsleep syz-fuzzer 64388 418898 6720 0 3 0x4000082 thrsleep syz-fuzzer 64388 320158 6720 0 3 0x4000082 kqread syz-fuzzer 64388 253884 6720 0 3 0x4000082 thrsleep syz-fuzzer 64388 43917 6720 0 3 0x4000082 thrsleep syz-fuzzer 6720 226898 76746 0 3 0x10008a pause ksh 76746 334234 23972 0 3 0x92 select sshd 94795 401330 1 0 3 0x100083 ttyopn getty 23972 486740 1 0 3 0x80 select sshd 65959 310995 96821 73 3 0x100090 kqread syslogd 96821 99697 1 0 3 0x100082 netio syslogd 50984 39604 1 77 3 0x100090 poll dhclient 88636 187563 1 0 3 0x80 poll dhclient 99985 306276 0 0 3 0x14200 bored smr 49341 358644 0 0 2 0x14200 zerothread 46838 359743 0 0 3 0x14200 aiodoned aiodoned 29979 437467 0 0 3 0x14200 syncer update 15971 315483 0 0 3 0x14200 cleaner cleaner 4781 416200 0 0 3 0x14200 reaper reaper 94703 290653 0 0 3 0x14200 pgdaemon pagedaemon 5880 523809 0 0 3 0x14200 bored crynlk 79864 265642 0 0 3 0x14200 bored crypto 42730 34873 0 0 3 0x40014200 acpi0 acpi0 38305 43712 0 0 3 0x14200 bored softnet 89612 188726 0 0 3 0x14200 bored systqmp 20929 337810 0 0 3 0x14200 bored systq 96018 123107 0 0 3 0x40014200 bored softclock 17088 107967 0 0 3 0x40014200 idle0 1 189163 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 9509 6416K 7358K 78643K 11186 0 pcb 13 8K 8K 78643K 44 0 rtable 97 2K 3K 78643K 266 0 ifaddr 72 14K 14K 78643K 96 0 counters 21 16K 16K 78643K 24 0 ioctlops 0 0K 2K 78643K 29 0 iov 0 0K 12K 78643K 42 0 mount 1 1K 1K 78643K 1 0 vnodes 1227 77K 77K 78643K 1434 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 32 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1794 195K 288K 78643K 12646 0 file desc 6 17K 25K 78643K 168 0 sigio 0 0K 0K 78643K 2 0 proc 50 38K 54K 78643K 366 0 subproc 32 2K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 17 0 in_multi 45 2K 2K 78643K 88 0 ether_multi 1 0K 0K 78643K 5 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 193 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 106 53K 58K 78643K 1236 0 UVM aobj 37 2K 2K 78643K 37 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 29 0 NDP 12 0K 0K 78643K 23 0 temp 112 3017K 3081K 78643K 10315 0 kqueue 3 4K 12K 78643K 12 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 7 0 0 1 0 1 1 0 8 0 rtpcb 80 27 0 25 1 0 1 1 0 8 0 rtentry 112 63 0 23 2 0 2 2 0 8 0 unpcb 120 258 0 248 1 0 1 1 0 8 0 syncache 264 6 0 6 2 2 0 1 0 8 0 tcpqe 32 43 0 43 2 2 0 1 0 8 0 tcpcb 544 121 0 115 1 0 1 1 0 8 0 inpcb 280 252 0 242 2 0 2 2 0 8 1 nd6 48 10 0 8 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 291 0 128 13 0 13 13 0 8 1 art_table 32 293 0 128 2 0 2 2 0 8 0 art_node 16 62 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 20 0 8 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 30 0 20 1 0 1 1 0 8 0 shmpl 112 35 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1650 0 254 46 0 46 46 0 8 0 ffsino 240 1650 0 254 83 0 83 83 0 8 0 nchpl 144 2115 0 505 60 0 60 60 0 8 0 uvmvnodes 72 1873 0 0 35 0 35 35 0 8 0 vnodes 208 1873 0 0 99 0 99 99 0 8 0 namei 1024 5855 0 5854 1 0 1 1 0 8 0 vcpupl 1984 3 0 1 1 0 1 1 0 8 0 vmpool 528 3 0 1 1 0 1 1 0 8 0 scxspl 192 6205 0 6205 1 0 1 1 0 8 1 plimitpl 152 30 0 23 1 0 1 1 0 8 0 sigapl 424 355 0 325 4 0 4 4 0 8 0 futexpl 56 5113 0 5113 1 0 1 1 0 8 1 knotepl 112 67 0 48 1 0 1 1 0 8 0 kqueuepl 144 40 0 38 1 0 1 1 0 8 0 pipelkpl 16 183 0 173 1 0 1 1 0 8 0 pipepl 120 366 0 347 2 1 1 2 0 8 0 fdescpl 432 340 0 325 2 0 2 2 0 8 0 filepl 120 2867 0 2765 5 1 4 5 0 8 0 lockfpl 104 171 0 170 1 0 1 1 0 8 0 lockfspl 48 41 0 40 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 225 0 218 1 0 1 1 0 8 0 zombiepl 144 325 0 325 1 0 1 1 0 8 1 processpl 896 355 0 325 4 0 4 4 0 8 0 procpl 624 558 0 518 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 400 542 0 521 4 0 4 4 0 8 1 mcl64k 65536 16 0 16 1 0 1 1 0 8 1 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl12k 12288 3 0 3 1 0 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 12 0 12 1 0 1 1 0 8 1 mcl4k 4096 35 0 35 2 1 1 1 0 8 1 mcl2k2 2112 2 0 2 2 1 1 1 0 8 1 mcl2k 2048 65460 0 65415 15 8 7 12 0 8 0 mtagpl 80 20 0 2 2 1 1 1 0 8 0 mbufpl 256 104180 0 104015 18 1 17 17 0 8 2 bufpl 280 4380 0 163 302 0 302 302 0 8 0 anonpl 16 45242 0 28454 70 2 68 68 0 107 0 amapchunkpl 152 1462 0 1325 8 1 7 8 0 158 0 amappl16 192 1571 0 645 47 0 47 47 0 8 0 amappl15 184 66 0 63 1 0 1 1 0 8 0 amappl14 176 9 0 8 2 1 1 1 0 8 0 amappl13 168 23 0 22 1 0 1 1 0 8 0 amappl12 160 7 0 6 1 0 1 1 0 8 0 amappl11 152 61 0 49 1 0 1 1 0 8 0 amappl10 144 17 0 13 1 0 1 1 0 8 0 amappl9 136 443 0 437 1 0 1 1 0 8 0 amappl8 128 347 0 325 1 0 1 1 0 8 0 amappl7 120 107 0 96 1 0 1 1 0 8 0 amappl6 112 21 0 17 1 0 1 1 0 8 0 amappl5 104 294 0 282 1 0 1 1 0 8 0 amappl4 96 440 0 410 1 0 1 1 0 8 0 amappl3 88 107 0 101 1 0 1 1 0 8 0 amappl2 80 1999 0 1926 3 1 2 3 0 8 0 amappl1 72 15762 0 15327 26 17 9 20 0 8 0 amappl 80 779 0 733 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 36 0 0 1 0 1 1 0 8 0 uaddrrnd 24 343 0 326 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 343 0 326 1 0 1 1 0 8 0 vmmpekpl 168 6777 0 6748 2 0 2 2 0 8 0 vmmpepl 168 47571 0 45472 121 15 106 115 0 357 14 vmsppl 272 342 0 326 2 0 2 2 0 8 0 pdppl 4096 692 0 654 6 1 5 6 0 8 0 pvpl 32 151521 0 131671 163 0 163 163 0 265 2 pvpl: pool(0xffffffff8256e4e0:pvpl): free list modified: page 0xfffffd805611c000; item ordinal 0; addr 0xfffffd805611c000 (p 0xfffffd805611c000); offset 0x0=0x0 pool(pvpl): free list modified: page 0xfffffd805611c000; item ordinal 0; addr 0xfffffd805611c000 (p 0xfffffd805611c000); offset 0x0=0x0 pvpl: pool(0xffffffff8256e4e0:pvpl): page inconsistency: page 0xfffffd805611c000; item ordinal 1; addr 0x8bacdab52a306aa2 pmappl 200 342 0 326 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 159 0 14 5 0 5 5 0 8 0