panic: pool_do_get: art_heap4 free list modified: page 0xfffffd8029d95000; item addr 0xfffffd8029d95000; offset 0x0=0x0 != 0x33773c11720e314c Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *125614 47675 0 0x2 0 0 ifconfig 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(ffffffff8259a378,a,ffff800017931978) at pool_do_get+0x42a sys/kern/subr_pool.c:746 pool_get(ffffffff8259a378,a) at pool_get+0xb5 sys/kern/subr_pool.c:581 art_table_get(ffff800000075a00,fffffd802dcbd968,1f) at art_table_get+0x12e sys/net/art.c:722 art_insert(ffff800000075a00,fffffd8036d6bbe0,ffff800000a66fe8,80) at art_insert+0x155 sys/net/art.c:387 rtable_insert(0,ffff800000a66fe0,0,ffff800000a66140,1,fffffd802a5ef698) at rtable_insert+0x2b4 sys/net/rtable.c:554 rtrequest(1,ffff800017931c98,1,ffff800017931d68,0) at rtrequest+0x8be sys/net/route.c:941 rt_ifa_add(ffff800000a95a00,240404,ffff800000a95a40,0) at rt_ifa_add+0x290 sys/net/route.c:1133 rt_ifa_addlocal(ffff800000a95a00) at rt_ifa_addlocal+0x149 sys/net/route.c:1242 in6_update_ifa(ffff800000a91800,ffff800017932020,0) at in6_update_ifa+0x13bb sys/netinet6/in6.c:723 in6_ifattach_linklocal(ffff800000a91800,0) at in6_ifattach_linklocal+0x2a2 sys/netinet6/in6_ifattach.c:281 in6_ifattach(ffff800000a91800) at in6_ifattach+0x17e sys/netinet6/in6_ifattach.c:400 ifnewlladdr(ffff800000a91800) at ifnewlladdr+0x119 sys/net/if.c:3127 end trace frame: 0xffff800017932260, 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: art_heap4 free list modified: page 0xfffffd8029d95000; item addr 0xfffffd8029d95000; offset 0x0=0x0 != 0x33773c11720e314c ddb> 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(ffffffff8259a378,a,ffff800017931978) at pool_do_get+0x42a sys/kern/subr_pool.c:746 pool_get(ffffffff8259a378,a) at pool_get+0xb5 sys/kern/subr_pool.c:581 art_table_get(ffff800000075a00,fffffd802dcbd968,1f) at art_table_get+0x12e sys/net/art.c:722 art_insert(ffff800000075a00,fffffd8036d6bbe0,ffff800000a66fe8,80) at art_insert+0x155 sys/net/art.c:387 rtable_insert(0,ffff800000a66fe0,0,ffff800000a66140,1,fffffd802a5ef698) at rtable_insert+0x2b4 sys/net/rtable.c:554 rtrequest(1,ffff800017931c98,1,ffff800017931d68,0) at rtrequest+0x8be sys/net/route.c:941 rt_ifa_add(ffff800000a95a00,240404,ffff800000a95a40,0) at rt_ifa_add+0x290 sys/net/route.c:1133 rt_ifa_addlocal(ffff800000a95a00) at rt_ifa_addlocal+0x149 sys/net/route.c:1242 in6_update_ifa(ffff800000a91800,ffff800017932020,0) at in6_update_ifa+0x13bb sys/netinet6/in6.c:723 in6_ifattach_linklocal(ffff800000a91800,0) at in6_ifattach_linklocal+0x2a2 sys/netinet6/in6_ifattach.c:281 in6_ifattach(ffff800000a91800) at in6_ifattach+0x17e sys/netinet6/in6_ifattach.c:400 ifnewlladdr(ffff800000a91800) at ifnewlladdr+0x119 sys/net/if.c:3127 ifioctl(fffffd8036ff9c00,8020691f,ffff800017932270,ffff8000ffff3b40) at ifioctl+0x1b2e sys/net/if.c:2205 sys_ioctl(ffff8000ffff3b40,ffff800017932380,ffff8000179323d0) at sys_ioctl+0x5b9 syscall(ffff800017932450) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffdec80, count: -18 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff8000179317e0 rbx 0xffff800017931890 rdx 0x2 rcx 0 rax 0 r8 0xffff8000179317a0 r9 0x1 r10 0 r11 0x8ab2fb2a4f47c626 r12 0x3000000008 r13 0xffff8000179317f0 r14 0x100 r15 0x1 rip 0xffffffff8127dee8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000179317d0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (ifconfig) pid=125614 stat=onproc flags process=2 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2290,0xffffffff825b1098 process=0xffff8000ffff6d90 user=0xffff80001792d000, vmspace=0xfffffd803f011330 estcpu=0, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND *47675 125614 97292 0 7 0x2 ifconfig 97292 214280 52032 0 2 0x100002 sh 52032 411867 59352 0 3 0x82 wait syz-executor.1 11715 466725 0 0 3 0x14200 bored sosplice 49708 3265 59352 0 3 0x82 piperd syz-executor.0 59352 202055 81359 0 3 0x82 thrsleep syz-fuzzer 59352 116241 81359 0 3 0x4000082 thrsleep syz-fuzzer 59352 202370 81359 0 3 0x4000082 thrsleep syz-fuzzer 59352 224146 81359 0 3 0x4000082 thrsleep syz-fuzzer 59352 230478 81359 0 3 0x4000082 kqread syz-fuzzer 59352 101325 81359 0 3 0x4000082 thrsleep syz-fuzzer 59352 35146 81359 0 3 0x4000082 thrsleep syz-fuzzer 59352 363538 81359 0 3 0x4000082 thrsleep syz-fuzzer 59352 52478 81359 0 3 0x4000082 thrsleep syz-fuzzer 81359 64032 89385 0 3 0x10008a pause ksh 89385 231842 85563 0 3 0x92 select sshd 26120 102918 1 0 3 0x100083 ttyin getty 85563 257398 1 0 3 0x80 select sshd 54845 429292 2405 73 3 0x100090 kqread syslogd 2405 12385 1 0 3 0x100082 netio syslogd 83311 153983 1 77 3 0x100090 poll dhclient 99579 184996 1 0 3 0x80 poll dhclient 25579 30605 0 0 2 0x14200 zerothread 56586 184809 0 0 3 0x14200 aiodoned aiodoned 91043 374972 0 0 3 0x14200 syncer update 7594 72413 0 0 3 0x14200 cleaner cleaner 10334 454210 0 0 3 0x14200 reaper reaper 63602 495284 0 0 3 0x14200 pgdaemon pagedaemon 28546 480977 0 0 3 0x14200 bored crynlk 12852 36624 0 0 3 0x14200 bored crypto 80100 42246 0 0 3 0x40014200 acpi0 acpi0 68876 155419 0 0 2 0x14200 softnet 31299 471157 0 0 2 0x14200 systqmp 97753 461310 0 0 3 0x14200 bored systq 19404 53149 0 0 3 0x40014200 bored softclock 48022 44054 0 0 3 0x40014200 idle0 14901 269463 0 0 3 0x14200 bored smr 1 56775 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 Kern Lim devbuf 9502 6351K 7060K 78643K 11026 0 0 pcb 13 8K 9K 78643K 271 0 0 rtable 88 3K 3K 78643K 258 0 0 ifaddr 71 13K 14K 78643K 99 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 19 0 0 iov 0 0K 16K 78643K 31 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1228 77K 77K 78643K 1374 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 7 0 0 VM map 2 0K 0K 78643K 2 0 0 sem 12 0K 1K 78643K 65 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 6 17K 25K 78643K 174 0 0 sigio 0 0K 0K 78643K 8 0 0 proc 55 46K 54K 78643K 423 0 0 subproc 32 2K 2K 78643K 51 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 16 0 0 in_multi 37 1K 2K 78643K 62 0 0 ether_multi 1 0K 0K 78643K 1 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 48 212K 212K 78643K 48 0 0 exec 0 0K 1K 78643K 204 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 102 21K 22K 78643K 1225 0 0 UVM aobj 18 2K 2K 78643K 20 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 30 0 0 NDP 12 0K 0K 78643K 20 0 0 temp 112 3529K 3593K 78643K 4879 0 0 kqueue 0 0K 0K 78643K 2 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 2 1 0 1 1 0 8 0 rtpcb 80 27 0 25 1 0 1 1 0 8 0 rtentry 112 55 0 21 2 0 2 2 0 8 0 unpcb 120 83 0 75 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 73 0 73 1 1 0 1 0 8 0 tcpcb 544 54 0 50 1 0 1 1 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 4 0 4 1 1 0 1 0 8 0 inpcb 280 396 0 388 2 0 2 2 0 8 1 nd6 48 6 0 5 1 0 1 1 0 8 0 ppxss 1128 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 282 0 82 15 0 15 15 0 8 2 art_heap4: pool(0xffffffff8259a378:art_heap4): free list modified: page 0xfffffd8029d95000; item ordinal 0; addr 0xfffffd8029d95000 (p 0xfffffd802d9f8000); offset 0x0=0x0 pool(art_heap4): free list modified: page 0xfffffd8029d95000; item ordinal 0; addr 0xfffffd8029d95000 (p 0xfffffd802d9f8000); offset 0x0=0x0 art_heap4: pool(0xffffffff8259a378:art_heap4): page inconsistency: page 0xfffffd8029d95000; item ordinal 1; addr 0xdab58c89ea77e143 art_table 32 285 0 82 2 0 2 2 0 8 0 art_node 16 54 0 18 1 0 1 1 0 8 0 sysvmsgpl 40 38 0 21 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 63 0 53 1 0 1 1 0 8 0 shmpl 112 18 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1626 0 225 46 0 46 46 0 8 0 ffsino 240 1626 0 225 83 0 83 83 0 8 0 nchpl 144 2087 0 494 60 0 60 60 0 8 0 uvmvnodes 72 1792 0 0 33 0 33 33 0 8 0 vnodes 208 1792 0 0 95 0 95 95 0 8 0 namei 1024 5402 0 5402 1 0 1 1 0 8 1 scxspl 192 5614 0 5614 8 1 7 7 0 8 7 plimitpl 152 21 0 14 1 0 1 1 0 8 0 sigapl 432 341 0 327 2 0 2 2 0 8 0 futexpl 56 4206 0 4206 1 0 1 1 0 8 1 knotepl 112 84 0 63 1 0 1 1 0 8 0 kqueuepl 104 38 0 36 1 0 1 1 0 8 0 pipepl 128 218 0 199 2 1 1 2 0 8 0 fdescpl 424 342 0 327 2 0 2 2 0 8 0 filepl 120 2238 0 2142 4 0 4 4 0 8 1 lockfpl 104 52 0 51 1 0 1 1 0 8 0 lockfspl 48 18 0 17 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 22 0 12 1 0 1 1 0 8 0 ucredpl 96 168 0 161 1 0 1 1 0 8 0 zombiepl 144 327 0 327 1 0 1 1 0 8 1 processpl 864 357 0 327 4 0 4 4 0 8 0 procpl 632 541 0 503 4 0 4 4 0 8 0 sosppl 128 3 0 3 1 0 1 1 0 8 1 sockpl 384 514 0 496 4 0 4 4 0 8 2 mcl64k 65536 23 0 23 1 0 1 1 0 8 1 mcl16k 16384 2 0 2 1 0 1 1 0 8 1 mcl12k 12288 4 0 4 1 0 1 1 0 8 1 mcl9k 9216 3 0 3 1 0 1 1 0 8 1 mcl8k 8192 6 0 6 1 0 1 1 0 8 1 mcl4k 4096 17 0 17 2 1 1 1 0 8 1 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 70000 0 69952 16 5 11 14 0 8 4 mtagpl 80 12 0 4 2 1 1 1 0 8 0 mbufpl 256 111790 0 111662 13 1 12 12 0 8 0 bufpl 256 6334 0 1518 302 0 302 302 0 8 0 anonpl 16 47851 0 32637 81 2 79 79 0 62 0 amapchunkpl 152 1587 0 1438 9 0 9 9 0 158 2 amappl16 192 1775 0 700 55 0 55 55 0 8 0 amappl15 184 1 0 1 1 1 0 1 0 8 0 amappl14 176 116 0 108 1 0 1 1 0 8 0 amappl13 168 66 0 66 1 0 1 1 0 8 1 amappl12 160 8 0 6 1 0 1 1 0 8 0 amappl11 152 49 0 37 1 0 1 1 0 8 0 amappl10 144 11 0 10 1 0 1 1 0 8 0 amappl9 136 563 0 559 1 0 1 1 0 8 0 amappl8 128 153 0 127 1 0 1 1 0 8 0 amappl7 120 36 0 31 1 0 1 1 0 8 0 amappl6 112 56 0 44 1 0 1 1 0 8 0 amappl5 104 148 0 134 1 0 1 1 0 8 0 amappl4 96 553 0 527 1 0 1 1 0 8 0 amappl3 88 113 0 107 1 0 1 1 0 8 0 amappl2 80 1978 0 1920 3 1 2 3 0 8 0 amappl1 72 15542 0 15107 26 17 9 20 0 8 0 amappl 80 767 0 724 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 19 0 2 1 0 1 1 0 8 0 uaddrrnd 24 342 0 327 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 342 0 327 1 0 1 1 0 8 0 vmmpekpl 168 6655 0 6631 2 0 2 2 0 8 0 vmmpepl 168 48991 0 46896 144 7 137 137 0 357 43 vmsppl 272 341 0 327 2 1 1 2 0 8 0 pdppl 4096 690 0 654 6 1 5 6 0 8 0 pvpl 32 156171 0 137871 188 0 188 188 0 265 5 pmappl 200 341 0 327 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 451 0 11 13 0 13 13 0 8 0