panic: ifa_update_broadaddr does not support dynamic length Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 74916 24041 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(ffff800000a67000,ffff800000a91800,ffff800020b4cfd0) at ifa_update_broadaddr+0x61 sys/net/if.c:2970 in_ioctl(80206913,ffff800020b4cfc0,ffff800000a67000,1) at in_ioctl+0x463 sys/netinet/in.c:299 ifioctl(fffffd806e990c08,80206913,ffff800020b4cfc0,ffff800020ab1b40) at ifioctl+0xb64 sys/net/if.c:2202 sys_ioctl(ffff800020ab1b40,ffff800020b4d0d8,ffff800020b4d120) at sys_ioctl+0x5b9 syscall(ffff800020b4d1a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020b4d1a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff36,0,3,105d1db5010) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe08d0, 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(ffff800000a67000,ffff800000a91800,ffff800020b4cfd0) at ifa_update_broadaddr+0x61 sys/net/if.c:2970 in_ioctl(80206913,ffff800020b4cfc0,ffff800000a67000,1) at in_ioctl+0x463 sys/netinet/in.c:299 ifioctl(fffffd806e990c08,80206913,ffff800020b4cfc0,ffff800020ab1b40) at ifioctl+0xb64 sys/net/if.c:2202 sys_ioctl(ffff800020ab1b40,ffff800020b4d0d8,ffff800020b4d120) at sys_ioctl+0x5b9 syscall(ffff800020b4d1a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800020b4d1a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffff36,0,3,105d1db5010) at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffe08d0, count: -8 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff800020b4cd60 rbx 0xffff800020b4ce10 rdx 0x8b rcx 0x2 rax 0x1 r8 0xffffffff8182804f kprintf+0x16f r9 0x1 r10 0xd183c27197a9ee83 r11 0x3179525c1ef6c503 r12 0x3000000008 r13 0xffff800020b4cd70 r14 0x100 r15 0x1 rip 0xffffffff81d20338 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800020b4cd50 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=74916 stat=onproc flags process=0 proc=0 pri=50, usrpri=50, nice=20 forw=0xffffffffffffffff, list=0xffff800020ab18c8,0xffffffff8266a638 process=0xffff800020add500 user=0xffff800020b48000, vmspace=0xfffffd807f00b450 estcpu=12, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND *24041 74916 74438 0 7 0 syz-executor.0 74438 170270 29251 0 3 0x82 nanosleep syz-executor.0 29251 387410 64419 0 3 0x82 thrsleep syz-execprog 29251 83779 64419 0 3 0x4000082 nanosleep syz-execprog 29251 345852 64419 0 3 0x4000082 thrsleep syz-execprog 29251 97815 64419 0 3 0x4000082 thrsleep syz-execprog 29251 252165 64419 0 3 0x4000082 nanosleep syz-execprog 29251 346488 64419 0 3 0x4000082 thrsleep syz-execprog 29251 267463 64419 0 3 0x4000082 thrsleep syz-execprog 29251 184962 64419 0 3 0x4000082 thrsleep syz-execprog 29251 371717 64419 0 3 0x4000082 kqread syz-execprog 64419 232874 41001 0 3 0x10008a pause ksh 41001 246941 16452 0 3 0x92 select sshd 78482 118184 1 0 3 0x100083 ttyin getty 16452 390060 1 0 3 0x80 select sshd 65593 113874 99847 74 3 0x100092 bpf pflogd 99847 290815 1 0 3 0x80 netio pflogd 62364 71865 14805 73 3 0x100090 kqread syslogd 14805 80196 1 0 3 0x100082 netio syslogd 82279 163968 1 77 3 0x100090 poll dhclient 70476 394584 1 0 3 0x80 poll dhclient 16910 235255 0 0 3 0x14200 pgzero zerothread 77584 318274 0 0 3 0x14200 aiodoned aiodoned 82578 406126 0 0 3 0x14200 syncer update 7250 342316 0 0 3 0x14200 cleaner cleaner 76246 346745 0 0 3 0x14200 reaper reaper 14654 355890 0 0 3 0x14200 pgdaemon pagedaemon 63647 423742 0 0 3 0x14200 bored crynlk 16215 226489 0 0 3 0x14200 bored crypto 96794 418891 0 0 3 0x40014200 acpi0 acpi0 99833 388527 0 0 7 0x40014200 idle1 50469 394070 0 0 3 0x14200 bored softnet 82273 250915 0 0 3 0x14200 bored systqmp 13324 334962 0 0 3 0x14200 bored systq 31839 200638 0 0 3 0x40014200 bored softclock 18202 426494 0 0 3 0x40014200 idle0 51849 278326 0 0 3 0x14200 bored smr 1 463991 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 24041 (syz-executor.0) thread 0xffff800020ab1b40 (74916) exclusive rwlock netlock r = 0 (0xffffffff82505ce8) #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 (0xffffffff8262ed78) #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 75 12K 12K 78643K 959 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 3542K 3606K 78643K 3335 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 1 0 1 1 0 8 1 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 0 1 0 1 1 0 8 0 pfstkey 112 10 0 0 1 0 1 1 0 8 0 pfstate 328 10 0 0 1 0 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 256 167 0 0 11 0 11 11 0 8 0 art_table 32 168 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 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scxspl 192 4092 0 4092 2 1 1 2 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 2 1 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 2 1 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 2 0 2 2 0 8 0 mcl4k 4096 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 79 0 0 10 0 10 10 0 8 0 mtagpl 80 1 0 0 1 0 1 1 0 8 0 mbufpl 256 106 0 0 7 0 7 7 0 8 0 bufpl 256 5887 0 1315 286 0 286 286 0 8 0 anonpl 16 22211 0 20637 15 2 13 13 0 124 6 amapchunkpl 152 889 0 823 5 0 5 5 0 158 1 amappl16 192 144 0 114 2 0 2 2 0 8 0 amappl15 184 1 0 1 1 0 1 1 0 8 1 amappl14 176 21 0 20 2 1 1 1 0 8 0 amappl13 168 2 0 1 1 0 1 1 0 8 0 amappl12 160 10 0 8 1 0 1 1 0 8 0 amappl11 152 58 0 39 1 0 1 1 0 8 0 amappl10 144 9 0 7 1 0 1 1 0 8 0 amappl9 136 440 0 435 1 0 1 1 0 8 0 amappl8 128 133 0 122 1 0 1 1 0 8 0 amappl7 120 35 0 32 1 0 1 1 0 8 0 amappl6 112 73 0 66 1 0 1 1 0 8 0 amappl5 104 160 0 145 1 0 1 1 0 8 0 amappl4 96 505 0 478 1 0 1 1 0 8 0 amappl3 88 115 0 110 1 0 1 1 0 8 0 amappl2 80 953 0 892 4 1 3 3 0 8 1 amappl1 72 15213 0 14786 25 7 18 20 0 8 8 amappl 80 479 0 450 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 6416 0 6394 2 0 2 2 0 8 0 vmmpepl 168 32427 0 31484 88 8 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 112552 0 108558 118 3 115 115 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 112 427 0 3 13 0 13 13 0 8 0 ddb{0}>