panic: pool_do_get: pvpl free list modified: page 0xfffffd8063674000; item addr 0xfffffd8063674000; offset 0x0=0x0 != 0x973c9b7c11fb9c9e Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 217290 57849 0 0 0x1 1 syz-executor.1 * 16619 57849 0 0 0x4000000 0K syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff82651bf0,2,ffff800021b9b358) at pool_do_get+0x439 sys/kern/subr_pool.c:746 pool_get() at pool_get+0xeb sys/kern/subr_pool.c:581 pmap_enter(fffffd806dd4b1e0,202fb000,64432000,3,33) at pmap_enter+0x16e uvm_fault(fffffd807f0088a0,202fb000,2,3) at uvm_fault+0x10f0 sys/uvm/uvm_fault.c:1217 uvm_fault_wire(fffffd807f0088a0,20001000,20801000,3) at uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295 uvm_map_pageable_wire(fffffd807f0088a0,fffffd8065b16640,fffffd8065b17440,ffff800022b7e000,ffffffff81b23967,0) at uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2345 sys_mlock(ffff800020ab0018,ffff800021b9b868,ffff800021b9b8b0) at sys_mlock+0x185 sys/uvm/uvm_mmap.c:739 syscall(ffff800021b9b930) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b9b930) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd089f201e90, count: 4 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic pool_do_get: pvpl free list modified: page 0xfffffd8063674000; item addr 0xfffffd8063674000; offset 0x0=0x0 != 0x973c9b7c11fb9c9e ddb{0}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff82651bf0,2,ffff800021b9b358) at pool_do_get+0x439 sys/kern/subr_pool.c:746 pool_get() at pool_get+0xeb sys/kern/subr_pool.c:581 pmap_enter(fffffd806dd4b1e0,202fb000,64432000,3,33) at pmap_enter+0x16e uvm_fault(fffffd807f0088a0,202fb000,2,3) at uvm_fault+0x10f0 sys/uvm/uvm_fault.c:1217 uvm_fault_wire(fffffd807f0088a0,20001000,20801000,3) at uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295 uvm_map_pageable_wire(fffffd807f0088a0,fffffd8065b16640,fffffd8065b17440,ffff800022b7e000,ffffffff81b23967,0) at uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2345 sys_mlock(ffff800020ab0018,ffff800021b9b868,ffff800021b9b8b0) at sys_mlock+0x185 sys/uvm/uvm_mmap.c:739 syscall(ffff800021b9b930) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b9b930) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd089f201e90, count: -11 ddb{0}> show registers rdi 0 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff800021b9b1a0 rbx 0xffff800021b9b250 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800022b7e000 rax 0xffff800000ab48c0 r8 0xffffffff8101132f kprintf+0x16f r9 0x1 r10 0x25 r11 0xbb31622b70a448a0 r12 0x3000000008 r13 0xffff800021b9b1b0 r14 0x100 r15 0x1 rip 0xffffffff820bb2c8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021b9b190 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=16619 stat=onproc flags process=0 proc=4000000 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab18c8,0xffffffff8264a8f8 process=0xffff800020add500 user=0xffff800021b96000, vmspace=0xfffffd807f0088a0 estcpu=31, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 57849 217290 14598 0 7 0x1 syz-executor.1 *57849 16619 14598 0 7 0x4000000 syz-executor.1 70201 141690 0 0 3 0x14200 bored sosplice 14598 354227 29572 0 3 0x82 nanosleep syz-executor.1 74961 164817 29572 0 2 0x2 syz-executor.0 68359 249898 1 0 3 0x100083 ttyin getty 29572 224731 70697 0 3 0x82 thrsleep syz-fuzzer 29572 120553 70697 0 3 0x4000082 nanosleep syz-fuzzer 29572 287410 70697 0 3 0x4000082 thrsleep syz-fuzzer 29572 427038 70697 0 3 0x4000082 thrsleep syz-fuzzer 29572 454114 70697 0 3 0x4000082 kqread syz-fuzzer 29572 389711 70697 0 3 0x4000082 nanosleep syz-fuzzer 29572 246821 70697 0 3 0x4000082 thrsleep syz-fuzzer 29572 370109 70697 0 3 0x4000082 thrsleep syz-fuzzer 29572 469121 70697 0 3 0x4000082 thrsleep syz-fuzzer 29572 410157 70697 0 3 0x4000082 thrsleep syz-fuzzer 70697 53299 31946 0 3 0x10008a pause ksh 31946 360257 97819 0 3 0x92 select sshd 97819 117954 1 0 3 0x80 select sshd 78892 37187 6821 74 3 0x100092 bpf pflogd 6821 79780 1 0 3 0x80 netio pflogd 66090 319937 36626 73 3 0x100090 kqread syslogd 36626 443720 1 0 3 0x100082 netio syslogd 29236 127282 1 77 3 0x100090 poll dhclient 85142 115366 1 0 3 0x80 poll dhclient 5411 414305 0 0 2 0x14200 zerothread 61929 181473 0 0 3 0x14200 aiodoned aiodoned 81860 324113 0 0 3 0x14200 syncer update 86199 213376 0 0 3 0x14200 cleaner cleaner 22505 359755 0 0 3 0x14200 reaper reaper 98417 455218 0 0 3 0x14200 pgdaemon pagedaemon 51334 466696 0 0 3 0x14200 bored crynlk 99869 271807 0 0 3 0x14200 bored crypto 55438 517756 0 0 3 0x40014200 acpi0 acpi0 83924 358771 0 0 3 0x40014200 idle1 69329 83690 0 0 3 0x14200 bored softnet 83613 391619 0 0 3 0x14200 bored systqmp 24549 414529 0 0 3 0x14200 bored systq 56872 188342 0 0 2 0x40014200 softclock 77828 35783 0 0 3 0x40014200 idle0 14338 421672 0 0 3 0x14200 bored smr 1 401235 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks CPU 0: exclusive mutex pvpl r = 0 (0xffffffff82651c00) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:578 #4 pmap_enter+0x16e #5 uvm_fault+0x10f0 sys/uvm/uvm_fault.c:1217 #6 uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295 #7 uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2345 #8 sys_mlock+0x185 sys/uvm/uvm_mmap.c:739 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 Process 57849 (syz-executor.1) thread 0xffff800020ab0018 (16619) shared rwlock vmmaplk r = 1 (0xfffffd807f0088b8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 vm_map_lock_ln+0x10d sys/uvm/uvm_map.c:5343 #3 uvm_map_pageable+0x11d sys/uvm/uvm_map.c:2441 #4 sys_mlock+0x185 sys/uvm/uvm_mmap.c:739 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82684eb8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555 #2 Xsyscall+0x128 exclusive mutex pvpl r = 0 (0xffffffff82651c00) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pool_get+0xbf sys/kern/subr_pool.c:578 #4 pmap_enter+0x16e #5 uvm_fault+0x10f0 sys/uvm/uvm_fault.c:1217 #6 uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295 #7 uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2345 #8 sys_mlock+0x185 sys/uvm/uvm_mmap.c:739 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 Process 74961 (syz-executor.0) thread 0xffff800020ab09f8 (164817) exclusive rrwlock inode r = 0 (0xfffffd806d8941b8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:451 #3 ufs_ihashins+0x45 sys/ufs/ufs/ufs_ihash.c:140 #4 ffs_vget+0x13e sys/ufs/ffs/ffs_vfsops.c:1352 #5 ffs_inode_alloc+0x1cf sys/ufs/ffs/ffs_alloc.c:392 #6 ufs_mkdir+0xf4 sys/ufs/ufs/ufs_vnops.c:1164 #7 VOP_MKDIR+0xc6 sys/kern/vfs_vops.c:450 #8 domkdirat+0x121 sys/kern/vfs_syscalls.c:2983 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd80691b72b8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rw_enter+0x447 sys/kern/kern_rwlock.c:306 #2 rrw_enter+0x4f sys/kern/kern_rwlock.c:451 #3 VOP_LOCK+0xf0 sys/kern/vfs_vops.c:615 #4 vn_lock+0x81 sys/kern/vfs_vnops.c:571 #5 vfs_lookup+0xe6 sys/kern/vfs_lookup.c:419 #6 namei+0x63c sys/kern/vfs_lookup.c:249 #7 domkdirat+0x75 sys/kern/vfs_syscalls.c:2968 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #9 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9538 7067K 7964K 78643K 11927 0 0 pcb 13 10K 12K 78643K 696 0 0 rtable 86 4K 4K 78643K 2453 0 0 ifaddr 78 14K 15K 78643K 209 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1498 0 0 iov 0 0K 24K 78643K 120 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1248 78K 79K 78643K 1724 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 9 0 0 VM map 10 5K 5K 78643K 10 0 0 sem 12 0K 1K 78643K 125 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 5 13K 25K 78643K 676 0 0 sigio 0 0K 0K 78643K 8 0 0 proc 60 63K 95K 78643K 565 0 0 subproc 32 2K 2K 78643K 68 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 1K 78643K 73 0 0 in_multi 36 2K 2K 78643K 112 0 0 ether_multi 1 0K 0K 78643K 3 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 60 265K 265K 78643K 60 0 0 exec 0 0K 1K 78643K 285 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 126 56K 56K 78643K 3192 0 0 UVM aobj 43 2K 2K 78643K 45 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 102 0 0 NDP 15 0K 0K 78643K 47 0 0 temp 148 3555K 4195K 78643K 18387 0 0 kqueue 0 0K 0K 78643K 2 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 210 0 206 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 81 0 79 1 0 1 1 0 8 0 rtentry 112 667 0 637 2 0 2 2 0 8 0 unpcb 120 473 0 463 2 0 2 2 0 8 1 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 15 0 15 1 1 0 1 0 8 0 tcpcb 544 383 0 379 12 11 1 12 0 8 0 inpcb 280 1718 0 1711 12 9 3 9 0 8 2 ip6q 72 2 0 2 1 0 1 1 0 8 1 ip6af 40 6 0 6 1 0 1 1 0 8 1 nd6 48 11 0 10 1 0 1 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 13 0 13 3 2 1 1 0 8 1 pffrag 232 9 0 8 2 1 1 1 0 482 0 pffrnode 88 9 0 8 2 1 1 1 0 8 0 pffrent 40 362 0 360 2 1 1 1 0 8 0 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 39 0 12 1 0 1 1 0 8 0 pfstkey 112 39 0 12 1 0 1 1 0 8 0 pfstate 328 39 0 12 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 1748 0 1592 14 0 14 14 0 8 0 art_table 32 1749 0 1592 2 0 2 2 0 8 0 art_node 16 666 0 638 1 0 1 1 0 8 0 sysvmsgpl 40 98 0 79 1 0 1 1 0 8 0 semupl 112 3 0 3 2 2 0 1 0 8 0 semapl 112 121 0 111 1 0 1 1 0 8 0 shmpl 112 43 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2376 0 972 46 0 46 46 0 8 0 ffsino 272 2376 0 972 95 1 94 95 0 8 0 nchpl 144 3666 0 2060 61 0 61 61 0 8 0 uvmvnodes 72 2768 0 0 51 0 51 51 0 8 0 vnodes 208 2768 0 0 146 0 146 146 0 8 0 namei 1024 10680 0 10679 2 1 1 1 0 8 0 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 8 0 0 1 0 1 1 0 8 0 vmpool 552 8 0 0 1 0 1 1 0 8 0 scsiplug 64 2 0 2 1 1 0 1 0 8 0 scxspl 192 10090 0 10090 10 7 3 6 0 8 3 plimitpl 152 57 0 49 1 0 1 1 0 8 0 sigapl 432 869 0 854 3 1 2 3 0 8 0 futexpl 56 15088 0 15088 1 0 1 1 0 8 1 knotepl 112 183 0 164 3 2 1 3 0 8 0 kqueuepl 104 254 0 252 4 3 1 4 0 8 0 pipepl 160 460 0 441 3 1 2 2 0 8 1 fdescpl 488 870 0 854 3 0 3 3 0 8 0 filepl 152 6899 0 6799 17 10 7 14 0 8 3 lockfpl 104 215 0 214 1 0 1 1 0 8 0 lockfspl 48 70 0 69 1 0 1 1 0 8 0 sessionpl 112 21 0 10 1 0 1 1 0 8 0 pgrppl 48 25 0 14 1 0 1 1 0 8 0 ucredpl 96 764 0 754 1 0 1 1 0 8 0 zombiepl 144 854 0 854 1 0 1 1 0 8 1 processpl 896 886 0 854 4 0 4 4 0 8 0 procpl 632 2294 0 2252 7 2 5 5 0 8 1 srpgc 64 2 0 2 1 1 0 1 0 8 0 sosppl 128 9 0 9 2 1 1 1 0 8 1 sockpl 384 2287 0 2268 18 12 6 14 0 8 4 mcl64k 65536 275 0 0 35 0 35 35 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 8 0 0 1 0 1 1 0 8 0 mcl9k 9216 5 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 9 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 176 0 0 21 0 21 21 0 8 0 mtagpl 80 28 0 0 1 0 1 1 0 8 0 mbufpl 256 704 0 0 43 0 43 43 0 8 0 bufpl 256 7766 0 1315 404 0 404 404 0 8 0 anonpl 16 117565 0 95644 119 17 102 102 0 124 13 amapchunkpl 152 5816 0 5532 17 6 11 12 0 158 0 amappl16 192 4916 0 3746 88 21 67 71 0 8 8 amappl15 184 8 0 7 1 0 1 1 0 8 0 amappl14 176 61 0 55 1 0 1 1 0 8 0 amappl13 168 184 0 182 2 1 1 1 0 8 0 amappl12 160 17 0 12 1 0 1 1 0 8 0 amappl11 152 65 0 50 1 0 1 1 0 8 0 amappl10 144 339 0 332 1 0 1 1 0 8 0 amappl9 136 748 0 745 1 0 1 1 0 8 0 amappl8 128 322 0 287 2 0 2 2 0 8 0 amappl7 120 367 0 360 1 0 1 1 0 8 0 amappl6 112 59 0 52 1 0 1 1 0 8 0 amappl5 104 154 0 138 1 0 1 1 0 8 0 amappl4 96 1133 0 1101 1 0 1 1 0 8 0 amappl3 88 132 0 126 1 0 1 1 0 8 0 amappl2 80 6124 0 6049 3 0 3 3 0 8 0 amappl1 72 28063 0 27626 25 15 10 20 0 8 0 amappl 80 2598 0 2549 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 44 0 2 1 0 1 1 0 8 0 uaddrrnd 24 878 0 854 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 878 0 854 1 0 1 1 0 8 0 vmmpekpl 168 10920 0 10886 2 0 2 2 0 8 0 vmmpepl 168 114388 0 112047 165 33 132 147 0 357 26 vmsppl 368 869 0 854 2 0 2 2 0 8 0 pdppl 4096 1763 0 1716 7 0 7 7 0 8 0 pvpl 32 324598 0 299406 256 20 236 236 0 265 32 pvpl: pool(0xffffffff82651bf0:pvpl): free list modified: page 0xfffffd8063674000; item ordinal 0; addr 0xfffffd8063674000 (p 0xfffffd8063674000); offset 0x0=0x0 pool(pvpl): free list modified: page 0xfffffd8063674000; item ordinal 0; addr 0xfffffd8063674000 (p 0xfffffd8063674000); offset 0x0=0x0 pvpl: pool(0xffffffff82651bf0:pvpl): page inconsistency: page 0xfffffd8063674000; item ordinal 1; addr 0x171815e1c98fd0c6 pmappl 232 877 0 854 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 647 0 16 19 0 19 19 0 8 0