panic() at panic+0x15c sys/kern/subr_prf.c:207 __assert(ffffffff821ffbca,ffffffff821ec101,2b2,ffffffff821cea60) at __assert+0x2b sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: 11 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 ifa_update_broadaddr does not support dynamic length ddb{1}> 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 __assert(ffffffff821ffbca,ffffffff821ec101,2b2,ffffffff821cea60) at __assert+0x2b sys/kern/subr_prf.c:154 proc_trampoline_mp() at proc_trampoline_mp+0x123 end trace frame: 0x0, count: -4 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff800022d63ac0 rbx 0xffff800022d63b70 rdx 0xffff800020abf3d8 rcx 0 rax 0 r8 0xffffffff81e6f5af kprintf+0x16f r9 0x1 r10 0x25 r11 0xc03d8ad73badb2e4 r12 0x3000000008 r13 0xffff800022d63ad0 r14 0x104 r15 0x1 rip 0xffffffff81584398 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022d63ab0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.0) pid=403583 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020abe018,0xffff800020abe790 process=0xffff800020add880 user=0xffff800022d5e000, vmspace=0xfffffd807f00aa10 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 57886 19537 16321 0 2 0 syz-executor.1 57886 396655 16321 0 7 0x4000000 syz-executor.1 92373 188754 69049 0 2 0 syz-executor.0 92373 396422 69049 0 3 0x4000080 ttyout syz-executor.0 *92373 403583 69049 0 7 0x4000000 syz-executor.0 63407 228533 1 0 3 0x100083 ttyin getty 69049 93389 31438 0 2 0x2 syz-executor.0 16321 212355 31438 0 3 0x82 nanosleep syz-executor.1 34865 346396 0 0 3 0x14200 bored sosplice 31438 243983 3618 0 3 0x82 thrsleep syz-fuzzer 31438 227263 3618 0 3 0x4000082 nanosleep syz-fuzzer 31438 66144 3618 0 3 0x4000082 thrsleep syz-fuzzer 31438 133664 3618 0 3 0x4000082 thrsleep syz-fuzzer 31438 80744 3618 0 3 0x4000082 thrsleep syz-fuzzer 31438 521897 3618 0 3 0x4000082 thrsleep syz-fuzzer 31438 414450 3618 0 3 0x4000082 thrsleep syz-fuzzer 31438 451202 3618 0 3 0x4000082 thrsleep syz-fuzzer 31438 326894 3618 0 3 0x4000082 thrsleep syz-fuzzer 31438 123030 3618 0 3 0x4000082 kqread syz-fuzzer 3618 81884 26685 0 3 0x10008a pause ksh 26685 92146 54291 0 3 0x92 select sshd 54291 313457 1 0 3 0x80 select sshd 30926 106576 35021 74 3 0x100092 bpf pflogd 35021 160091 1 0 3 0x80 netio pflogd 49945 351849 17957 73 3 0x100090 kqread syslogd 17957 403745 1 0 3 0x100082 netio syslogd 21680 480966 1 77 3 0x100090 poll dhclient 30598 326456 1 0 3 0x80 poll dhclient 8540 290688 0 0 2 0x14200 zerothread 13448 428949 0 0 3 0x14200 aiodoned aiodoned 91570 85289 0 0 3 0x14200 syncer update 90580 498462 0 0 3 0x14200 cleaner cleaner 67320 34171 0 0 3 0x14200 reaper reaper 19169 399950 0 0 3 0x14200 pgdaemon pagedaemon 73793 128888 0 0 3 0x14200 bored crynlk 41721 416560 0 0 3 0x14200 bored crypto 87854 94111 0 0 3 0x40014200 acpi0 acpi0 97598 343675 0 0 3 0x40014200 idle1 10469 393921 0 0 3 0x14200 bored softnet 76335 518525 0 0 3 0x14200 bored systqmp 6061 100039 0 0 3 0x14200 bored systq 44102 273069 0 0 3 0x40014200 bored softclock 6063 347074 0 0 3 0x40014200 idle0 86653 215363 0 0 3 0x14200 bored smr 1 19899 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 57886 (syz-executor.1) thread 0xffff800020abe780 (396655) exclusive rwlock netlock r = 0 (0xffffffff8247b378) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 in_ioctl_change_ifaddr+0x3f #2 in_ioctl+0x205 sys/netinet/in.c:234 #3 ifioctl+0xb64 sys/net/if.c:2202 #4 sys_ioctl+0x5b9 #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 (0xffffffff826195b8) #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 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9567 6455K 7116K 78643K 16380 0 0 pcb 13 8K 8K 78643K 399 0 0 rtable 108 12K 13K 78643K 1150 0 0 ifaddr 72 16K 17K 78643K 347 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1563 0 0 iov 0 0K 24K 78643K 278 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1232 77K 78K 78643K 3417 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 39 0 0 VM map 2 1K 1K 78643K 4 0 0 sem 12 0K 0K 78643K 1060 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 2442 0 0 sigio 0 0K 0K 78643K 52 0 0 proc 61 63K 95K 78643K 1171 0 0 subproc 32 2K 2K 78643K 246 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 211 0 0 in_multi 30 2K 2K 78643K 221 0 0 ether_multi 1 0K 0K 78643K 16 0 0 mrt 0 0K 0K 78643K 18 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 102 450K 450K 78643K 102 0 0 exec 0 0K 1K 78643K 563 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 115 22K 31K 78643K 9344 0 0 UVM aobj 130 4K 4K 78643K 135 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 386 0 0 NDP 16 0K 0K 78643K 111 0 0 temp 200 3556K 3632K 78643K 70300 0 0 kqueue 0 0K 0K 78643K 9 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 32 0 26 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 142 0 140 1 0 1 1 0 8 0 rtentry 112 180 0 140 2 0 2 2 0 8 0 unpcb 120 1407 0 1392 4 3 1 2 0 8 0 syncache 264 12 0 12 4 4 0 1 0 8 0 tcpqe 32 6307 0 6307 3 3 0 2 0 8 0 tcpcb 544 1730 0 1725 3 2 1 3 0 8 0 inpcb 280 5624 0 5616 9 6 3 4 0 8 2 rttmr 72 5 0 5 5 4 1 1 0 8 1 nd6 48 29 0 26 1 0 1 1 0 8 0 pkpcb 40 13 0 13 5 4 1 1 0 8 1 ppxss 1128 39 0 39 10 9 1 1 0 8 1 pffrag 232 2 0 2 1 1 0 1 0 482 0 pffrnode 88 2 0 2 1 1 0 1 0 8 0 pffrent 40 4 0 4 1 1 0 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 1561 0 1022 4 0 4 4 0 8 0 pfstkey 112 1561 0 1022 19 1 18 18 0 8 0 pfstate 328 1561 0 1022 61 9 52 52 0 8 1 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 256 814 0 613 16 2 14 15 0 8 0 art_table 32 815 0 613 2 0 2 2 0 8 0 art_node 16 179 0 142 1 0 1 1 0 8 0 sysvmsgpl 40 27 0 13 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1056 0 1046 1 0 1 1 0 8 0 shmpl 112 133 0 5 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 4970 0 3573 46 0 46 46 0 8 0 ffsino 272 4970 0 3573 94 0 94 94 0 8 0 nchpl 144 9205 0 8721 61 39 22 61 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 29577 0 29577 3 2 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 2 0 2 1 1 0 1 0 8 0 scsiplug 64 7 0 7 4 3 1 1 0 8 1 scxspl 192 24661 0 24661 27 24 3 7 0 8 3 plimitpl 152 231 0 223 1 0 1 1 0 8 0 sigapl 432 2608 0 2592 4 2 2 3 0 8 0 futexpl 56 57834 0 57834 1 0 1 1 0 8 1 knotepl 112 632 0 613 2 1 1 2 0 8 0 kqueuepl 104 625 0 623 2 1 1 2 0 8 0 pipepl 112 2344 0 2325 7 6 1 2 0 8 0 fdescpl 488 2609 0 2592 3 0 3 3 0 8 0 filepl 152 23181 0 23078 20 14 6 8 0 8 2 lockfpl 104 637 0 636 1 0 1 1 0 8 0 lockfspl 48 221 0 220 1 0 1 1 0 8 0 sessionpl 112 32 0 21 1 0 1 1 0 8 0 pgrppl 48 252 0 241 1 0 1 1 0 8 0 ucredpl 96 2493 0 2484 1 0 1 1 0 8 0 zombiepl 144 2595 0 2595 3 2 1 1 0 8 1 processpl 896 2628 0 2595 4 0 4 4 0 8 0 procpl 632 8004 0 7959 5 0 5 5 0 8 1 srpgc 64 19 0 19 6 6 0 1 0 8 0 sosppl 128 31 0 31 8 7 1 1 0 8 1 sockpl 384 7215 0 7190 23 16 7 9 0 8 3 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 8 0 0 1 0 1 1 0 8 0 mcl12k 12288 17 0 0 2 0 2 2 0 8 0 mcl9k 9216 8 0 0 1 0 1 1 0 8 0 mcl8k 8192 21 0 0 3 1 2 3 0 8 0 mcl4k 4096 20 0 0 3 0 3 3 0 8 1 mcl2k2 2112 6 0 0 1 0 1 1 0 8 0 mcl2k 2048 249 0 0 30 2 28 30 0 8 0 mtagpl 80 73 0 0 1 0 1 1 0 8 0 mbufpl 256 366 0 0 17 0 17 17 0 8 0 bufpl 256 11576 0 4528 441 0 441 441 0 8 0 anonpl 16 269217 0 253417 119 47 72 79 0 124 7 amapchunkpl 152 17204 0 17091 38 28 10 12 0 158 5 amappl16 192 11967 0 11073 96 48 48 57 0 8 2 amappl15 184 406 0 406 2 2 0 1 0 8 0 amappl14 176 507 0 501 2 1 1 1 0 8 0 amappl13 168 291 0 290 1 0 1 1 0 8 0 amappl12 160 435 0 434 1 0 1 1 0 8 0 amappl11 152 97 0 82 1 0 1 1 0 8 0 amappl10 144 266 0 263 1 0 1 1 0 8 0 amappl9 136 1294 0 1287 1 0 1 1 0 8 0 amappl8 128 818 0 787 2 0 2 2 0 8 0 amappl7 120 355 0 347 1 0 1 1 0 8 0 amappl6 112 89 0 76 1 0 1 1 0 8 0 amappl5 104 641 0 627 1 0 1 1 0 8 0 amappl4 96 2606 0 2571 2 1 1 2 0 8 0 amappl3 88 1186 0 1173 1 0 1 1 0 8 0 amappl2 80 19590 0 19510 4 2 2 3 0 8 0 amappl1 72 68036 0 67571 27 17 10 20 0 8 0 amappl 80 8442 0 8403 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 17 0 17 1 1 0 1 0 8 0 aobjpl 64 134 0 5 3 0 3 3 0 8 0 uaddrrnd 24 2611 0 2592 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2611 0 2592 1 0 1 1 0 8 0 vmmpekpl 168 26134 0 26097 2 0 2 2 0 8 0 vmmpepl 168 328420 0 326266 278 150 128 138 0 357 29 vmsppl 368 2608 0 2592 2 0 2 2 0 8 0 pdppl 4096 5229 0 5188 7 1 6 6 0 8 0 pvpl 32 734325 0 715199 291 113 178 189 0 265 18 pmappl 232 2610 0 2594 4 3 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 629 0 13 18 0 18 18 0 8 0