panic: pool_p_free: pvpl free list modified: page 0xfffffd806640e000; item addr 0xfffffd806640e008; offset 0x0=0x0 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *382573 59942 0 0x14000 0x200 0 systqmp db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82432dc5) at panic+0x15c sys/kern/subr_prf.c:207 pool_p_free(ffffffff827f7cd0,fffffd806640ef90) at pool_p_free+0x1de sys/kern/subr_pool.c:983 pool_gc_pages(0) at pool_gc_pages+0x225 sys/kern/subr_pool.c:1578 taskq_thread(ffffffff826a5030) at taskq_thread+0x92 sys/kern/kern_task.c:438 end trace frame: 0x0, count: 10 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_p_free: pvpl free list modified: page 0xfffffd806640e000; item addr 0xfffffd806640e008; offset 0x0=0x0 ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82432dc5) at panic+0x15c sys/kern/subr_prf.c:207 pool_p_free(ffffffff827f7cd0,fffffd806640ef90) at pool_p_free+0x1de sys/kern/subr_pool.c:983 pool_gc_pages(0) at pool_gc_pages+0x225 sys/kern/subr_pool.c:1578 taskq_thread(ffffffff826a5030) at taskq_thread+0x92 sys/kern/kern_task.c:438 end trace frame: 0x0, count: -5 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff80001d672330 rbx 0xffff80001d6723e0 rdx 0x2 rcx 0 rax 0x1 r8 0xffffffff8193eacf kprintf+0x15f r9 0x1 r10 0x2 r11 0x53d1a611ce47c205 r12 0x3000000008 r13 0xffff80001d672340 r14 0x100 r15 0x1 rip 0xffffffff81a55c98 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001d672320 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (systqmp) pid=382573 stat=onproc flags process=14000 proc=200 pri=32, usrpri=51, nice=20 forw=0xffffffffffffffff, list=0xffff80001d652110,0xffff80001d651280 process=0xffff8000ffffe398 user=0xffff80001d66d000, vmspace=0xffffffff828046b8 estcpu=1, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 1502 375834 92439 0 3 0x82 nanosleep syz-executor.0 19707 508974 0 0 3 0x14280 nfsidl nfsio 44045 256183 0 0 3 0x14280 nfsidl nfsio 12818 171168 0 0 3 0x14280 nfsidl nfsio 16938 414496 0 0 3 0x14280 nfsidl nfsio 75923 140752 0 0 3 0x14280 nfsidl nfsio 90781 140175 0 0 3 0x14280 nfsidl nfsio 2036 17276 0 0 3 0x14280 nfsidl nfsio 29073 142023 0 0 3 0x14280 nfsidl nfsio 34495 94067 0 0 3 0x14280 nfsidl nfsio 36633 452934 0 0 3 0x14280 nfsidl nfsio 41687 272002 0 0 3 0x14280 nfsidl nfsio 98023 250361 0 0 3 0x14280 nfsidl nfsio 91396 283617 0 0 3 0x14280 nfsidl nfsio 59096 92849 0 0 3 0x14280 nfsidl nfsio 82647 210704 0 0 3 0x14280 nfsidl nfsio 45736 301603 0 0 3 0x14280 nfsidl nfsio 11441 450090 0 0 3 0x14280 nfsidl nfsio 91288 260662 0 0 3 0x14280 nfsidl nfsio 16498 380991 0 0 3 0x14280 nfsidl nfsio 80500 145763 0 0 3 0x14280 nfsidl nfsio 97391 48904 0 0 3 0x14200 bored sosplice 31856 237812 92439 0 3 0x82 piperd syz-executor.1 92439 392548 59170 0 3 0x82 thrsleep syz-fuzzer 92439 161003 59170 0 3 0x4000082 thrsleep syz-fuzzer 92439 139323 59170 0 3 0x4000082 thrsleep syz-fuzzer 92439 295585 59170 0 3 0x4000082 thrsleep syz-fuzzer 92439 458962 59170 0 3 0x4000082 thrsleep syz-fuzzer 92439 7389 59170 0 3 0x4000082 kqread syz-fuzzer 92439 433156 59170 0 3 0x4000082 thrsleep syz-fuzzer 92439 431120 59170 0 3 0x4000082 thrsleep syz-fuzzer 59170 351622 3788 0 3 0x10008a pause ksh 3788 409818 8691 0 3 0x92 select sshd 27113 441044 1 0 3 0x100083 ttyin getty 8691 68302 1 0 3 0x80 select sshd 50396 276277 27825 73 3 0x100090 kqread syslogd 27825 51010 1 0 3 0x100082 netio syslogd 68052 248043 1 77 3 0x100090 poll dhclient 32000 125928 1 0 3 0x80 poll dhclient 98672 64768 0 0 3 0x14200 bored smr 25571 20512 0 0 3 0x14200 pgzero zerothread 81461 483014 0 0 3 0x14200 aiodoned aiodoned 87402 381781 0 0 3 0x14200 syncer update 95322 25519 0 0 3 0x14200 cleaner cleaner 24185 425925 0 0 3 0x14200 reaper reaper 70338 447248 0 0 3 0x14200 pgdaemon pagedaemon 77339 189105 0 0 3 0x14200 bored crynlk 74443 445785 0 0 3 0x14200 bored crypto 85313 173579 0 0 3 0x40014200 acpi0 acpi0 21986 446160 0 0 3 0x14200 bored softnet *59942 382573 0 0 7 0x14200 systqmp 53253 76539 0 0 3 0x14200 bored systq 4277 76067 0 0 3 0x40014200 bored softclock 7870 458270 0 0 3 0x40014200 idle0 1 409521 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 9498 6349K 6988K 78643K 13125 0 pcb 13 8K 8K 78643K 79 0 rtable 109 8K 8K 78643K 489 0 ifaddr 83 17K 18K 78643K 181 0 counters 21 16K 16K 78643K 28 0 ioctlops 0 0K 4K 78643K 71 0 iov 0 0K 16K 78643K 34 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 2153 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 10 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 642 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 949 0 sigio 0 0K 0K 78643K 6 0 proc 49 38K 63K 78643K 441 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 89 0 in_multi 67 3K 3K 78643K 107 0 ether_multi 1 0K 0K 78643K 9 0 mrt 0 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 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 133 72K 72K 78643K 3014 0 UVM aobj 22 2K 2K 78643K 22 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 45 0 NDP 11 0K 0K 78643K 24 0 temp 114 3849K 3913K 78643K 35930 0 kqueue 3 4K 14K 78643K 34 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 9 0 3 1 0 1 1 0 8 0 rtpcb 80 45 0 43 1 0 1 1 0 8 0 rtentry 112 62 0 29 2 0 2 2 0 8 0 unpcb 120 133 0 125 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 109 0 109 1 1 0 1 0 8 0 tcpcb 544 200 0 196 1 0 1 1 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 88 0 88 1 1 0 1 0 8 0 inpcb 280 444 0 437 2 1 1 2 0 8 0 rttmr 72 3 0 3 2 2 0 1 0 8 0 nd6 48 9 0 3 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 pfrktable 1344 80 0 70 5 4 1 1 0 8 0 pftag 88 14 0 12 5 4 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 2 0 0 1 0 1 1 0 8 0 pfstate 328 1 0 0 1 0 1 1 0 8 0 pfrule 1360 17 0 11 5 4 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 301 0 149 14 4 10 12 0 8 0 art_table 32 302 0 149 2 0 2 2 0 8 0 art_node 16 61 0 32 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 4 1 0 1 1 0 8 0 semupl 112 7 0 7 1 1 0 1 0 8 0 semapl 112 632 0 622 1 0 1 1 0 8 0 shmpl 112 20 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2838 0 1444 88 0 88 88 0 8 0 ffsino 240 2838 0 1444 83 0 83 83 0 8 0 nchpl 144 4226 0 2637 60 0 60 60 0 8 0 uvmvnodes 72 3374 0 0 62 0 62 62 0 8 0 vnodes 208 3374 0 0 178 0 178 178 0 8 0 namei 1024 15062 0 15062 8 7 1 1 0 8 1 vcpupl 1984 5 0 0 1 0 1 1 0 8 0 vmpool 528 7 0 2 1 0 1 1 0 8 0 pfiaddrpl 120 27 0 19 5 4 1 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 11465 0 11465 1 0 1 1 0 8 1 plimitpl 152 31 0 24 1 0 1 1 0 8 0 sigapl 424 1153 0 1104 6 0 6 6 0 8 0 futexpl 56 15580 0 15580 8 7 1 1 0 8 1 knotepl 112 108 0 89 1 0 1 1 0 8 0 kqueuepl 144 122 0 119 1 0 1 1 0 8 0 pipelkpl 16 158 0 148 1 0 1 1 0 8 0 pipepl 120 316 0 297 1 0 1 1 0 8 0 fdescpl 432 1118 0 1104 2 0 2 2 0 8 0 filepl 120 8356 0 8258 5 1 4 4 0 8 0 lockfpl 104 129 0 128 1 0 1 1 0 8 0 lockfspl 48 43 0 42 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 20 0 10 1 0 1 1 0 8 0 ucredpl 96 3779 0 3772 1 0 1 1 0 8 0 zombiepl 144 1105 0 1104 2 1 1 1 0 8 0 processpl 920 1153 0 1104 7 0 7 7 0 8 0 procpl 624 2270 0 2214 6 1 5 6 0 8 0 sosppl 128 7 0 7 3 3 0 1 0 8 0 sockpl 400 622 0 605 9 6 3 3 0 8 1 mcl64k 65536 14 0 12 2 1 1 1 0 8 0 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl12k 12288 18 0 18 4 3 1 1 0 8 1 mcl9k 9216 5 0 5 4 3 1 1 0 8 1 mcl8k 8192 14 0 14 8 8 0 1 0 8 0 mcl4k 4096 48 0 48 8 7 1 1 0 8 1 mcl2k2 2112 7 0 7 3 3 0 1 0 8 0 mcl2k 2048 74990 0 74925 22 12 10 15 0 8 0 mtagpl 80 316 0 72 7 1 6 6 0 8 1 mbufpl 256 122861 0 122128 55 8 47 47 0 8 0 bufpl 280 4865 0 127 339 0 339 339 0 8 0 anonpl 16 111055 0 95835 92 24 68 80 0 107 2 amapchunkpl 152 5821 0 5665 35 22 13 20 0 158 6 amappl16 192 5676 0 4801 74 26 48 56 0 8 4 amappl15 184 9 0 7 1 0 1 1 0 8 0 amappl14 176 26 0 21 1 0 1 1 0 8 0 amappl13 168 34 0 31 1 0 1 1 0 8 0 amappl12 160 5 0 4 2 1 1 1 0 8 0 amappl11 152 52 0 43 1 0 1 1 0 8 0 amappl10 144 618 0 611 1 0 1 1 0 8 0 amappl9 136 647 0 644 1 0 1 1 0 8 0 amappl8 128 662 0 618 2 0 2 2 0 8 0 amappl7 120 333 0 321 1 0 1 1 0 8 0 amappl6 112 25 0 21 1 0 1 1 0 8 0 amappl5 104 1109 0 1097 1 0 1 1 0 8 0 amappl4 96 439 0 410 1 0 1 1 0 8 0 amappl3 88 135 0 129 1 0 1 1 0 8 0 amappl2 80 8051 0 7988 2 0 2 2 0 8 0 amappl1 72 28938 0 28518 24 15 9 17 0 8 0 amappl 80 2501 0 2452 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 21 0 0 1 0 1 1 0 8 0 uaddrrnd 24 1125 0 1106 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1125 0 1106 1 0 1 1 0 8 0 vmmpekpl 168 11064 0 11023 2 0 2 2 0 8 0 vmmpepl 168 135475 0 133498 179 85 94 125 0 357 2 vmsppl 272 1124 0 1106 5 3 2 2 0 8 0 pdppl 4096 2256 0 2217 8 2 6 6 0 8 0 pvpl 32 313251 0 294929 217 42 175 190 0 265 19 pmappl 200 1124 0 1106 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 329 0 66 8 0 8 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(ffffffff82432dc5) at panic+0x15c sys/kern/subr_prf.c:207 pool_p_free(ffffffff827f7cd0,fffffd806640ef90) at pool_p_free+0x1de sys/kern/subr_pool.c:983 pool_gc_pages(0) at pool_gc_pages+0x225 sys/kern/subr_pool.c:1578 taskq_thread(ffffffff826a5030) at taskq_thread+0x92 sys/kern/kern_task.c:438 end trace frame: 0x0, count: -5 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82432dc5) at panic+0x15c sys/kern/subr_prf.c:207 pool_p_free(ffffffff827f7cd0,fffffd806640ef90) at pool_p_free+0x1de sys/kern/subr_pool.c:983 pool_gc_pages(0) at pool_gc_pages+0x225 sys/kern/subr_pool.c:1578 taskq_thread(ffffffff826a5030) at taskq_thread+0x92 sys/kern/kern_task.c:438 end trace frame: 0x0, count: -5