panic: ifa_update_broadaddr does not support dynamic length Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *501733 85251 0 0 0 0K syz-executor.0 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 ifa_update_broadaddr(ffff800000a68000,ffff800000a92800,ffff800020b60e40) at ifa_update_broadaddr+0x61 sys/net/if.c:2970 in_ioctl(80206913,ffff800020b60e30,ffff800000a68000,1) at in_ioctl+0x463 sys/netinet/in.c:299 ifioctl(fffffd806e976c08,80206913,ffff800020b60e30,ffff800020ab1160) at ifioctl+0xb64 sys/net/if.c:2202 sys_ioctl(ffff800020ab1160,ffff800020b60f48,ffff800020b60f90) at sys_ioctl+0x5b9 syscall(ffff800020b61010) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020b61010) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff36,0,3,acb0f515010) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffead40, count: 7 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 ifa_update_broadaddr does not support dynamic length 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 ifa_update_broadaddr(ffff800000a68000,ffff800000a92800,ffff800020b60e40) at ifa_update_broadaddr+0x61 sys/net/if.c:2970 in_ioctl(80206913,ffff800020b60e30,ffff800000a68000,1) at in_ioctl+0x463 sys/netinet/in.c:299 ifioctl(fffffd806e976c08,80206913,ffff800020b60e30,ffff800020ab1160) at ifioctl+0xb64 sys/net/if.c:2202 sys_ioctl(ffff800020ab1160,ffff800020b60f48,ffff800020b60f90) at sys_ioctl+0x5b9 syscall(ffff800020b61010) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020b61010) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff36,0,3,acb0f515010) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffead40, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020b60bd0 rbx 0xffff800020b60c80 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff81ba769f kprintf+0x16f r9 0x1 r10 0x18cc9577c8fb2d2d r11 0xa9b5d603ac7241fb r12 0x3000000008 r13 0xffff800020b60be0 r14 0x100 r15 0x1 rip 0xffffffff810273e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020b60bc0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=501733 stat=onproc flags process=0 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab1650,0xffffffff8264fbd0 process=0xffff800020adce00 user=0xffff800020b5c000, vmspace=0xfffffd807f00b170 estcpu=0, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *85251 501733 87308 0 7 0 syz-executor.0 87308 392370 17911 0 3 0x82 nanosleep syz-executor.0 17911 1746 83862 0 3 0x82 kqread syz-execprog 17911 26458 83862 0 3 0x4000082 nanosleep syz-execprog 17911 39750 83862 0 3 0x4000082 thrsleep syz-execprog 17911 194765 83862 0 3 0x4000082 thrsleep syz-execprog 17911 155107 83862 0 3 0x4000082 thrsleep syz-execprog 17911 190538 83862 0 3 0x4000082 thrsleep syz-execprog 17911 223665 83862 0 3 0x4000082 thrsleep syz-execprog 17911 256725 83862 0 3 0x4000082 thrsleep syz-execprog 17911 397806 83862 0 3 0x4000082 thrsleep syz-execprog 83862 166707 95335 0 3 0x10008a pause ksh 95335 233451 92490 0 3 0x92 select sshd 29853 403901 1 0 3 0x100083 ttyin getty 92490 410626 1 0 3 0x80 select sshd 27916 446047 67530 74 3 0x100092 bpf pflogd 67530 405654 1 0 3 0x80 netio pflogd 17225 418568 42469 73 3 0x100090 kqread syslogd 42469 328499 1 0 3 0x100082 netio syslogd 68402 333093 1 77 3 0x100090 poll dhclient 82924 447566 1 0 3 0x80 poll dhclient 84849 194200 0 0 3 0x14200 pgzero zerothread 16145 100575 0 0 3 0x14200 aiodoned aiodoned 2107 253788 0 0 3 0x14200 syncer update 77273 2041 0 0 3 0x14200 cleaner cleaner 45997 16761 0 0 3 0x14200 reaper reaper 46441 95649 0 0 3 0x14200 pgdaemon pagedaemon 58906 204034 0 0 3 0x14200 bored crynlk 29890 14461 0 0 3 0x14200 bored crypto 55876 225151 0 0 3 0x40014200 acpi0 acpi0 69106 211977 0 0 7 0x40014200 idle1 93720 230091 0 0 3 0x14200 bored softnet 87976 402206 0 0 3 0x14200 bored systqmp 53168 96522 0 0 3 0x14200 bored systq 53939 165693 0 0 3 0x40014200 bored softclock 19543 423985 0 0 3 0x40014200 idle0 16691 267872 0 0 3 0x14200 bored smr 1 313097 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 85251 (syz-executor.0) thread 0xffff800020ab1160 (501733) exclusive rwlock netlock r = 0 (0xffffffff824c1198) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 in_ioctl+0x142 #2 ifioctl+0xb64 sys/net/if.c:2202 #3 sys_ioctl+0x5b9 #4 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #4 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #5 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82624d88) #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9457 6385K 6385K 78643K 10544 0 0 pcb 13 8K 8K 78643K 15 0 0 rtable 83 2K 2K 78643K 163 0 0 ifaddr 32 9K 9K 78643K 33 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1468 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1181 74K 74K 78643K 1186 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 1K 78643K 2 0 0 VM map 2 1K 1K 78643K 2 0 0 sem 2 0K 0K 78643K 2 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 3 8K 12K 78643K 18 0 0 proc 59 63K 83K 78643K 384 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 in_multi 22 1K 1K 78643K 22 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 18 79K 79K 78643K 18 0 0 exec 0 0K 1K 78643K 199 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 74 12K 12K 78643K 956 0 0 UVM aobj 2 2K 2K 78643K 2 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 NDP 7 0K 0K 78643K 7 0 0 temp 48 3546K 3610K 78643K 3336 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 4 0 0 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 17 0 15 1 0 1 1 0 8 0 rtentry 112 34 0 1 1 0 1 1 0 8 0 unpcb 120 29 0 19 1 0 1 1 0 8 0 syncache 264 5 0 5 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 1 0 1 0 8 0 tcpcb 544 8 0 5 1 0 1 1 0 8 0 inpcb 280 34 0 27 1 0 1 1 0 8 0 nd6 48 2 0 0 1 0 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 10 0 6 2 1 1 1 0 8 0 pfstkey 112 10 0 6 2 1 1 1 0 8 0 pfstate 328 10 0 6 2 1 1 1 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 256 168 0 0 11 0 11 11 0 8 0 art_table 32 169 0 0 2 0 2 2 0 8 0 art_node 16 33 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1422 0 20 46 0 46 46 0 8 0 ffsino 272 1422 0 20 94 0 94 94 0 8 0 nchpl 144 1661 0 49 60 0 60 60 0 8 0 uvmvnodes 72 1432 0 0 27 0 27 27 0 8 0 vnodes 208 1432 0 0 76 0 76 76 0 8 0 namei 1024 4142 0 4142 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 4334 0 4334 40 39 1 7 0 8 1 plimitpl 152 15 0 8 1 0 1 1 0 8 0 sigapl 432 226 0 212 2 0 2 2 0 8 0 knotepl 112 39 0 28 1 0 1 1 0 8 0 kqueuepl 104 2 0 0 1 0 1 1 0 8 0 pipepl 112 154 0 141 3 2 1 1 0 8 0 fdescpl 488 227 0 212 3 0 3 3 0 8 0 filepl 152 1121 0 1062 3 0 3 3 0 8 0 lockfpl 104 5 0 4 1 0 1 1 0 8 0 lockfspl 48 3 0 2 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 52 0 43 1 0 1 1 0 8 0 zombiepl 144 212 0 212 3 2 1 1 0 8 1 processpl 896 242 0 212 4 0 4 4 0 8 0 procpl 632 250 0 212 4 0 4 4 0 8 0 sockpl 384 80 0 61 3 1 2 3 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 78 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 117 0 0 7 0 7 7 0 8 0 bufpl 256 5887 0 1315 286 0 286 286 0 8 0 anonpl 16 22191 0 20621 16 3 13 13 0 124 6 amapchunkpl 152 810 0 744 5 0 5 5 0 158 2 amappl16 192 131 0 102 2 0 2 2 0 8 0 amappl14 176 27 0 23 3 2 1 1 0 8 0 amappl12 160 3 0 3 1 1 0 1 0 8 0 amappl11 152 62 0 43 1 0 1 1 0 8 0 amappl10 144 15 0 11 1 0 1 1 0 8 0 amappl9 136 452 0 447 1 0 1 1 0 8 0 amappl8 128 127 0 118 1 0 1 1 0 8 0 amappl7 120 35 0 32 1 0 1 1 0 8 0 amappl6 112 83 0 73 1 0 1 1 0 8 0 amappl5 104 146 0 131 1 0 1 1 0 8 0 amappl4 96 500 0 473 1 0 1 1 0 8 0 amappl3 88 118 0 112 1 0 1 1 0 8 0 amappl2 80 954 0 894 5 2 3 3 0 8 1 amappl1 72 15038 0 14616 25 7 18 20 0 8 8 amappl 80 478 0 449 1 0 1 1 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 1 0 0 1 0 1 1 0 8 0 uaddrrnd 24 227 0 212 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 227 0 212 1 0 1 1 0 8 0 vmmpekpl 168 6424 0 6402 2 0 2 2 0 8 0 vmmpepl 168 32591 0 31646 91 11 80 80 0 357 38 vmsppl 368 226 0 212 2 0 2 2 0 8 0 pdppl 4096 461 0 424 6 0 6 6 0 8 1 pvpl 32 112288 0 108300 124 9 115 115 0 265 81 pmappl 232 226 0 212 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 428 0 4 13 0 13 13 0 8 0