panic: pool_do_get: anonpl free list modified: page 0xfffffd80633e7000; item addr 0xfffffd80633e7000; offset 0x0=0x0 != 0x9ac50ed35f835b89 Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 398667 74618 0 0 0x4000080 0 syz-executor.0 *240528 12056 0 0 0x4000000 1K syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82263396) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff8263b2e8,2,ffff800021baec88) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff8263b2e8,2) at pool_get+0xeb sys/kern/subr_pool.c:581 uvm_analloc() at uvm_analloc+0x29 sys/uvm/uvm_anon.c:64 uvm_fault(fffffd806e9a8008,20197000,2,3) at uvm_fault+0xfb6 sys/uvm/uvm_fault.c:1114 uvm_fault_wire(fffffd806e9a8008,20009000,20487000,3) at uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295 uvm_map_pageable_wire(fffffd806e9a8008,fffffd80629ee4e8,fffffd80629ee248,ffff800022d9a000,ffffffff810f8807,0) at uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2358 sys_mlock(ffff800020ae7608,ffff800021baf0c8,ffff800021baf110) at sys_mlock+0x185 sys/uvm/uvm_mmap.c:765 syscall(ffff800021baf190) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021baf190) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x841818cc420, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic pool_do_get: anonpl free list modified: page 0xfffffd80633e7000; item addr 0xfffffd80633e7000; offset 0x0=0x0 != 0x9ac50ed35f835b89 ddb{1}> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic(ffffffff82263396) at panic+0x15c sys/kern/subr_prf.c:207 pool_do_get(ffffffff8263b2e8,2,ffff800021baec88) at pool_do_get+0x439 sys/kern/subr_pool.c:738 pool_get(ffffffff8263b2e8,2) at pool_get+0xeb sys/kern/subr_pool.c:581 uvm_analloc() at uvm_analloc+0x29 sys/uvm/uvm_anon.c:64 uvm_fault(fffffd806e9a8008,20197000,2,3) at uvm_fault+0xfb6 sys/uvm/uvm_fault.c:1114 uvm_fault_wire(fffffd806e9a8008,20009000,20487000,3) at uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295 uvm_map_pageable_wire(fffffd806e9a8008,fffffd80629ee4e8,fffffd80629ee248,ffff800022d9a000,ffffffff810f8807,0) at uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2358 sys_mlock(ffff800020ae7608,ffff800021baf0c8,ffff800021baf110) at sys_mlock+0x185 sys/uvm/uvm_mmap.c:765 syscall(ffff800021baf190) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] syscall(ffff800021baf190) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x841818cc420, count: -11 ddb{1}> show registers rdi 0 rsi 0x3ffff acpi_pdirpa+0x2be67 rbp 0xffff800021baead0 rbx 0xffff800021baeb80 rdx 0x40000 acpi_pdirpa+0x2be68 rcx 0xffff800022d9a000 rax 0xffff8000009d23c0 r8 0xffffffff8111e7ff kprintf+0x16f r9 0x1 r10 0x25 r11 0x798fa618a7003248 r12 0x3000000008 r13 0xffff800021baeae0 r14 0x100 r15 0x1 rip 0xffffffff814a4098 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800021baeac0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=240528 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020ae6768,0xffff800020ae7af8 process=0xffff800020a9d6a0 user=0xffff800021baa000, vmspace=0xfffffd806e9a8008 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74618 59291 58085 0 2 0 syz-executor.0 74618 398667 58085 0 7 0x4000080 syz-executor.0 12056 4428 67824 0 2 0 syz-executor.1 *12056 240528 67824 0 7 0x4000000 syz-executor.1 52494 374947 0 0 3 0x14200 bored sosplice 67824 81818 37377 0 3 0x82 nanosleep syz-executor.1 58085 454231 37377 0 3 0x82 nanosleep syz-executor.0 37377 383171 43544 0 3 0x82 thrsleep syz-fuzzer 37377 448101 43544 0 3 0x4000082 nanosleep syz-fuzzer 37377 483258 43544 0 3 0x4000082 thrsleep syz-fuzzer 37377 190057 43544 0 3 0x4000082 thrsleep syz-fuzzer 37377 98843 43544 0 3 0x4000082 kqread syz-fuzzer 37377 121118 43544 0 3 0x4000082 thrsleep syz-fuzzer 37377 170027 43544 0 3 0x4000082 thrsleep syz-fuzzer 37377 226383 43544 0 3 0x4000082 thrsleep syz-fuzzer 37377 171487 43544 0 3 0x4000082 thrsleep syz-fuzzer 37377 190493 43544 0 3 0x4000082 thrsleep syz-fuzzer 43544 358771 19767 0 3 0x10008a pause ksh 19767 148625 80078 0 3 0x92 select sshd 41154 488659 1 0 3 0x100083 ttyin getty 80078 305039 1 0 3 0x80 select sshd 65990 348539 69000 74 3 0x100092 bpf pflogd 69000 104275 1 0 3 0x80 netio pflogd 21529 96840 29837 73 3 0x100090 kqread syslogd 29837 111309 1 0 3 0x100082 netio syslogd 12496 501521 1 77 3 0x100090 poll dhclient 93140 237300 1 0 3 0x80 poll dhclient 99030 468830 0 0 2 0x14200 zerothread 78517 261242 0 0 3 0x14200 aiodoned aiodoned 885 481096 0 0 3 0x14200 syncer update 31944 34899 0 0 3 0x14200 cleaner cleaner 5408 411893 0 0 3 0x14200 reaper reaper 77166 33949 0 0 3 0x14200 pgdaemon pagedaemon 23167 459404 0 0 3 0x14200 bored crynlk 30812 338684 0 0 3 0x14200 bored crypto 61143 96189 0 0 3 0x40014200 acpi0 acpi0 44940 38873 0 0 3 0x40014200 idle1 82092 107223 0 0 3 0x14200 bored softnet 55161 358873 0 0 3 0x14200 bored systqmp 34681 281237 0 0 3 0x14200 bored systq 5059 471125 0 0 3 0x40014200 bored softclock 47077 90237 0 0 3 0x40014200 idle0 12932 224809 0 0 3 0x14200 bored smr 1 460297 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 1: exclusive mutex anonpl r = 0 (0xffffffff8263b2f8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #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 uvm_analloc+0x29 sys/uvm/uvm_anon.c:64 #5 uvm_fault+0xfb6 sys/uvm/uvm_fault.c:1114 #6 uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295 #7 uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2358 #8 sys_mlock+0x185 sys/uvm/uvm_mmap.c:765 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #10 Xsyscall+0x128 Process 12056 (syz-executor.1) thread 0xffff800020ae7608 (240528) shared rwlock vmmaplk r = 1 (0xfffffd806e9a8020) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 rw_enter+0x453 sys/kern/kern_rwlock.c:309 #2 vm_map_lock_ln+0x111 sys/uvm/uvm_map.c:5409 #3 uvm_map_pageable+0x11d sys/uvm/uvm_map.c:2454 #4 sys_mlock+0x185 sys/uvm/uvm_mmap.c:765 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #6 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff8264b4b0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:93 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:570 #2 Xsyscall+0x128 exclusive mutex anonpl r = 0 (0xffffffff8263b2f8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1164 #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 uvm_analloc+0x29 sys/uvm/uvm_anon.c:64 #5 uvm_fault+0xfb6 sys/uvm/uvm_fault.c:1114 #6 uvm_fault_wire+0x70 sys/uvm/uvm_fault.c:1295 #7 uvm_map_pageable_wire+0x2dd sys/uvm/uvm_map.c:2358 #8 sys_mlock+0x185 sys/uvm/uvm_mmap.c:765 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:102 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:570 #10 Xsyscall+0x128 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9552 6444K 7190K 78643K 11238 0 pcb 13 8K 8K 78643K 176 0 rtable 101 3K 3K 78643K 322 0 ifaddr 107 20K 20K 78643K 165 0 counters 43 33K 34K 78643K 59 0 ioctlops 0 0K 4K 78643K 1492 0 iov 0 0K 16K 78643K 84 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1437 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 12 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 136 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 6 17K 25K 78643K 491 0 sigio 0 0K 0K 78643K 26 0 proc 62 63K 95K 78643K 484 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 61 0 in_multi 96 4K 4K 78643K 161 0 ether_multi 1 0K 0K 78643K 18 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 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 247 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 124 40K 55K 78643K 2684 0 UVM aobj 37 2K 2K 78643K 38 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 115 0 NDP 16 0K 0K 78643K 30 0 temp 149 3027K 3094K 78643K 11814 0 kqueue 4 6K 8K 78643K 34 0 SYN cache 2 16K 16K 78643K 2 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 8 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 52 0 50 1 0 1 1 0 8 0 rtentry 112 64 0 22 2 0 2 2 0 8 0 unpcb 120 355 0 345 1 0 1 1 0 8 0 syncache 264 7 0 7 2 1 1 1 0 8 1 tcpqe 32 430 0 430 2 1 1 1 0 8 1 tcpcb 544 985 0 981 3 1 2 2 0 8 1 inpcb 280 2103 0 2092 5 2 3 3 0 8 1 nd6 48 9 0 6 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 pffrag 232 11 0 11 4 3 1 1 0 482 1 pffrnode 88 11 0 11 4 3 1 1 0 8 1 pffrent 40 409 0 409 4 3 1 1 0 8 1 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 69 0 19 1 0 1 1 0 8 0 pfstkey 112 69 0 19 2 0 2 2 0 8 0 pfstate 328 69 0 18 5 0 5 5 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 256 269 0 87 13 0 13 13 0 8 0 art_table 32 270 0 87 2 0 2 2 0 8 0 art_node 16 61 0 21 1 0 1 1 0 8 0 sysvmsgpl 40 37 0 15 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 134 0 124 1 0 1 1 0 8 0 shmpl 112 36 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2143 0 737 46 0 46 46 0 8 0 ffsino 272 2143 0 737 95 0 95 95 0 8 0 nchpl 144 3116 0 1498 61 0 61 61 0 8 0 uvmvnodes 72 2307 0 0 42 0 42 42 0 8 0 vnodes 208 2307 0 0 122 0 122 122 0 8 0 namei 1024 9474 0 9474 2 1 1 1 0 8 1 percpumem 16 40 0 8 1 0 1 1 0 8 0 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 560 6 0 4 2 1 1 1 0 8 0 scxspl 192 9443 0 9443 10 7 3 6 0 8 3 plimitpl 152 57 0 49 1 0 1 1 0 8 0 sigapl 424 707 0 674 4 0 4 4 0 8 0 futexpl 56 13047 0 13047 1 0 1 1 0 8 1 knotepl 112 90 0 71 1 0 1 1 0 8 0 kqueuepl 144 107 0 104 1 0 1 1 0 8 0 pipelkpl 48 372 0 362 1 0 1 1 0 8 0 pipepl 120 744 0 725 3 2 1 2 0 8 0 fdescpl 496 691 0 674 3 0 3 3 0 8 0 filepl 152 6792 0 6691 7 1 6 6 0 8 2 lockfpl 104 123 0 122 1 0 1 1 0 8 0 lockfspl 48 40 0 39 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 24 0 13 1 0 1 1 0 8 0 ucredpl 96 555 0 546 1 0 1 1 0 8 0 zombiepl 144 674 0 674 2 1 1 1 0 8 1 processpl 960 707 0 674 5 0 5 5 0 8 0 procpl 624 1895 0 1851 5 1 4 5 0 8 0 sosppl 128 9 0 9 2 1 1 1 0 8 1 sockpl 400 2531 0 2512 7 2 5 6 0 8 3 mcl64k 65536 262 0 0 33 0 33 33 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 5 0 0 1 0 1 1 0 8 0 mcl9k 9216 7 0 0 1 0 1 1 0 8 0 mcl8k 8192 14 0 0 2 0 2 2 0 8 0 mcl4k 4096 12 0 0 2 0 2 2 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 185 0 0 23 0 23 23 0 8 0 mtagpl 80 39 0 0 1 0 1 1 0 8 0 mbufpl 256 475 0 0 29 0 29 29 0 8 0 bufpl 280 5302 0 176 367 0 367 367 0 8 0 anonpl 16 76263 0 58456 87 3 84 86 0 124 12 anonpl: pool(0xffffffff8263b2e8:anonpl): free list modified: page 0xfffffd80633e7000; item ordinal 0; addr 0xfffffd80633e7000 (p 0xfffffd80633e7000); offset 0x0=0x0 anonpl: pool(0xffffffff8263b2e8:anonpl): page inconsistency: page 0xfffffd80633e7000; item ordinal 1; addr 0x387cc2f26320438c amapchunkpl 152 4467 0 4179 15 1 14 14 0 158 2 amappl16 192 3321 0 2371 59 6 53 59 0 8 5 amappl15 184 9 0 7 1 0 1 1 0 8 0 amappl14 176 11 0 6 2 1 1 1 0 8 0 amappl13 168 27 0 25 1 0 1 1 0 8 0 amappl12 160 7 0 5 1 0 1 1 0 8 0 amappl11 152 76 0 58 1 0 1 1 0 8 0 amappl10 144 257 0 250 1 0 1 1 0 8 0 amappl9 136 611 0 606 1 0 1 1 0 8 0 amappl8 128 556 0 524 2 0 2 2 0 8 0 amappl7 120 355 0 343 1 0 1 1 0 8 0 amappl6 112 26 0 22 1 0 1 1 0 8 0 amappl5 104 594 0 576 1 0 1 1 0 8 0 amappl4 96 507 0 472 2 1 1 2 0 8 0 amappl3 88 133 0 127 1 0 1 1 0 8 0 amappl2 80 4656 0 4580 3 1 2 3 0 8 0 amappl1 72 25074 0 24630 25 15 10 20 0 8 0 amappl 80 2156 0 2105 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 37 0 1 1 0 1 1 0 8 0 uaddrrnd 24 697 0 678 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 697 0 678 1 0 1 1 0 8 0 vmmpekpl 168 10340 0 10302 2 0 2 2 0 8 0 vmmpepl 168 92124 0 89909 125 20 105 115 0 357 8 vmsppl 368 696 0 678 2 0 2 2 0 8 0 pdppl 4096 1401 0 1358 6 0 6 6 0 8 0 pvpl 32 243934 0 222908 203 3 200 202 0 265 30 pmappl 232 696 0 678 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 231 0 8 7 0 7 7 0 8 0