panic: kernel diagnostic assertion "ifp != NULL" failed: file "/syzkaller/managers/setuid/kernel/sys/netinet/if_ether.c", line 759 Stopped at db_enter+0x1c: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *191081 95453 0 0x14000 0x200 1 softclockmp 234889 57999 0 0x14000 0x40000200 0K softclock db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ab22d) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82825ecc,ffffffff82875e08,2f7,ffffffff82771d1d) at __assert+0x29 sys/kern/subr_prf.c:157 arptfree(fffffd80714fa698) at arptfree+0x132 sys/netinet/if_ether.c:759 arptimer(ffffffff82d794b8) at arptimer+0x88 sys/netinet/if_ether.c:135 timeout_run(ffffffff82d794b8) at timeout_run+0xd0 sys/kern/kern_timeout.c:665 softclock_thread_mp(ffff800021168000) at softclock_thread_mp+0xc4 sys/kern/kern_timeout.c:833 end trace frame: 0x0, count: 8 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 *cpu1: kernel diagnostic assertion "ifp != NULL" failed: file "/syzkaller/managers/setuid/kernel/sys/netinet/if_ether.c", line 759 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ab22d) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82825ecc,ffffffff82875e08,2f7,ffffffff82771d1d) at __assert+0x29 sys/kern/subr_prf.c:157 arptfree(fffffd80714fa698) at arptfree+0x132 sys/netinet/if_ether.c:759 arptimer(ffffffff82d794b8) at arptimer+0x88 sys/netinet/if_ether.c:135 timeout_run(ffffffff82d794b8) at timeout_run+0xd0 sys/kern/kern_timeout.c:665 softclock_thread_mp(ffff800021168000) at softclock_thread_mp+0xc4 sys/kern/kern_timeout.c:833 end trace frame: 0x0, count: -7 ddb{1}> show registers rdi 0 rsi 0x1 rbp 0xffff80002117b040 rbx 0xffff800020d59ba7 rdx 0 rcx 0xffff800021168000 rax 0xffff800020d58ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x4b19d7809f38717c r11 0x5160f84c15b58041 r12 0xffff800020d599a8 r13 0 r14 0 r15 0x1 rip 0xffffffff813d04dc db_enter+0x1c cs 0x8 rflags 0x246 rsp 0xffff80002117b030 ss 0 db_enter+0x1c: addq $0x8,%rsp ddb{1}> show proc PROC (softclockmp) tid=191081 pid=95453 tcnt=1 stat=onproc flags process=14000 proc=200 runpri=0, usrpri=50, slppri=0, nice=20 wchan=0x0, wmesg=, ps_single=0x0 forw=0xffffffffffffffff, list=0xffff800021168550,0xffff8000211682b8 process=0xffff8000ffffe9e0 user=0xffff800021176000, vmspace=0xffffffff82d13ff0 estcpu=0, cpticks=2, pctcpu=0.0, user=0, sys=2, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74746 471190 99783 32767 2 0x10 syz-executor.2 74746 112483 99783 32767 2 0x4000010 syz-executor.2 59139 214540 68684 32767 2 0x10 syz-executor.1 59139 195795 68684 32767 3 0x4000090 fsleep syz-executor.1 59139 454945 68684 32767 3 0x4000090 fsleep syz-executor.1 59139 374972 68684 32767 2 0x4000010 syz-executor.1 97354 484473 24302 32767 2 0x10 syz-executor.3 97354 502347 24302 32767 3 0x4000090 fsleep syz-executor.3 4782 279440 17357 32767 2 0x10 syz-executor.6 4782 427988 17357 32767 3 0x4000090 fsleep syz-executor.6 8238 219875 86439 32767 2 0x10 syz-executor.5 8238 266163 86439 32767 3 0x4000090 fsleep syz-executor.5 5327 309923 54207 32767 3 0x90 nanoslp syz-executor.4 54207 479210 99705 0 3 0x82 wait syz-executor.4 68684 173409 74888 32767 3 0x90 nanoslp syz-executor.1 74888 43610 99705 0 3 0x82 wait syz-executor.1 86439 167356 45105 32767 2 0x490 syz-executor.5 45105 292875 99705 0 3 0x82 wait syz-executor.5 13709 483490 16114 32767 2 0x490 syz-executor.7 16114 249420 99705 0 3 0x82 wait syz-executor.7 39506 157607 99705 0 3 0x82 wait syz-executor.0 24302 201099 76552 32767 2 0x490 syz-executor.3 76552 222957 99705 0 3 0x82 wait syz-executor.3 17357 157801 56349 32767 3 0x90 nanoslp syz-executor.6 56349 498044 99705 0 3 0x82 wait syz-executor.6 99783 361246 30737 32767 3 0x90 nanoslp syz-executor.2 30737 333467 99705 0 3 0x82 wait syz-executor.2 42183 506303 0 0 2 0x14200 sosplice 99705 259809 80551 0 3 0x2000082 wait syz-fuzzer 99705 350518 80551 0 3 0x6000082 thrsleep syz-fuzzer 99705 352181 80551 0 3 0x6000082 thrsleep syz-fuzzer 99705 281795 80551 0 3 0x6000082 thrsleep syz-fuzzer 99705 66032 80551 0 3 0x6000082 kqread syz-fuzzer 99705 158566 80551 0 3 0x6000082 thrsleep syz-fuzzer 99705 509938 80551 0 3 0x6000082 wait syz-fuzzer 99705 339196 80551 0 3 0x6000082 wait syz-fuzzer 99705 433075 80551 0 3 0x6000082 thrsleep syz-fuzzer 99705 346468 80551 0 3 0x6000082 thrsleep syz-fuzzer 99705 87004 80551 0 3 0x6000082 wait syz-fuzzer 99705 60242 80551 0 3 0x6000082 wait syz-fuzzer 99705 336426 80551 0 3 0x6000082 thrsleep syz-fuzzer 99705 316381 80551 0 3 0x6000082 wait syz-fuzzer 99705 352708 80551 0 3 0x6000082 wait syz-fuzzer 99705 442703 80551 0 3 0x6000082 wait syz-fuzzer 80551 288716 85111 0 3 0x10008a sigsusp ksh 85111 188112 63091 0 3 0x9a kqread sshd 42307 160784 1 0 3 0x100083 ttyin getty 63091 78687 1 0 3 0x88 kqread sshd 50521 95888 10308 73 3 0x1100090 kqread syslogd 10308 200499 1 0 3 0x100082 netio syslogd 88588 412139 1 0 3 0x100080 kqread resolvd 66170 145741 3697 77 3 0x100092 kqread dhcpleased 77826 152135 3697 77 3 0x100092 kqread dhcpleased 3697 486244 1 0 3 0x80 kqread dhcpleased 98355 290807 0 0 3 0x14200 bored smr 67347 212753 0 0 2 0x14200 zerothread 41313 505158 0 0 3 0x14200 aiodoned aiodoned 24765 18246 0 0 3 0x14200 syncer update 17984 337741 0 0 3 0x14200 cleaner cleaner 5807 112107 0 0 3 0x14200 reaper reaper 73311 130582 0 0 3 0x14200 pgdaemon pagedaemon 39283 237656 0 0 3 0x14200 bored viomb 57077 386916 0 0 3 0x40014200 acpi0 acpi0 52338 11754 0 0 3 0x40014200 idle1 18945 401182 0 0 3 0x14200 bored softnet3 72486 41022 0 0 3 0x14200 bored softnet2 89433 194653 0 0 3 0x14200 bored softnet1 5213 394875 0 0 3 0x14200 bored softnet0 37588 39598 0 0 3 0x14200 bored systqmp 18069 204992 0 0 3 0x14200 bored systq *95453 191081 0 0 7 0x14200 softclockmp 57999 234889 0 0 7 0x40014200 softclock 60322 266420 0 0 3 0x40014200 idle0 1 459642 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 74746 (syz-executor.2) thread 0xffff8000212822a8 (112483) exclusive rrwlock inode r = 0 (0xfffffd80679a7b38) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 ufs_ihashins+0x46 sys/ufs/ufs/ufs_ihash.c:140 #5 ffs_vget+0x141 sys/ufs/ffs/ffs_vfsops.c:1343 #6 ffs_inode_alloc+0x1c2 sys/ufs/ffs/ffs_alloc.c:394 #7 ufs_mkdir+0xf8 sys/ufs/ufs/ufs_vnops.c:1149 #8 VOP_MKDIR+0xc3 sys/kern/vfs_vops.c:388 #9 domkdirat+0x125 sys/kern/vfs_syscalls.c:3073 #10 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #10 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #11 Xsyscall+0x128 exclusive rrwlock inode r = 0 (0xfffffd8076695a38) #0 witness_lock+0x447 #1 rw_enter+0x3c8 sys/kern/kern_rwlock.c:309 #2 rrw_enter+0x8c sys/kern/kern_rwlock.c:464 #3 VOP_LOCK+0x8b sys/kern/vfs_vops.c:518 #4 vn_lock+0x84 sys/kern/vfs_vnops.c:564 #5 vfs_lookup+0xd5 sys/kern/vfs_lookup.c:418 #6 namei+0x55a sys/kern/vfs_lookup.c:250 #7 domkdirat+0x79 sys/kern/vfs_syscalls.c:3058 #8 syscall+0x5e2 mi_syscall sys/sys/syscall_mi.h:110 [inline] #8 syscall+0x5e2 sys/arch/amd64/amd64/trap.c:623 #9 Xsyscall+0x128 Process 95453 (softclockmp) thread 0xffff800021168000 (191081) exclusive rwlock netlock r = 0 (0xffffffff82be4ef0) #0 witness_lock+0x447 #1 arptimer+0x26 sys/netinet/if_ether.c:132 #2 timeout_run+0xd0 sys/kern/kern_timeout.c:665 #3 softclock_thread_mp+0xc4 sys/kern/kern_timeout.c:833 #4 proc_trampoline+0x10 shared rwlock timeout r = 0 (0xffffffff82bee088) #0 witness_lock+0x447 #1 timeout_run+0xbb sys/kern/kern_timeout.c:661 #2 softclock_thread_mp+0xc4 sys/kern/kern_timeout.c:833 #3 proc_trampoline+0x10 Process 57999 (softclock) thread 0xffff800021168550 (234889) exclusive kernel_lock &kernel_lock r = 0 (0xffffffff82d082e0) #0 witness_lock+0x447 #1 __mp_acquire_count+0x48 sys/kern/kern_lock.c:227 #2 mi_switch+0x46d sys/kern/sched_bsd.c:470 #3 sleep_finish+0x19b sys/kern/kern_synch.c:414 #4 msleep+0xea sys/kern/kern_synch.c:249 #5 softclock_thread+0xd0 sys/kern/kern_timeout.c:805 #6 proc_trampoline+0x10 ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10220 6413K 6420K 78643K 11516 0 pcb 13 16K 20K 78643K 19 0 rtable 242 6K 7K 78643K 4054 0 pf 29 8K 8K 78643K 173 0 ifaddr 44 16K 16K 78643K 340 0 ifgroup 50 2K 2K 78643K 338 0 sysctl 4 1K 5K 78643K 9 0 counters 60 35K 35K 78643K 204 0 ioctlops 0 0K 2K 78643K 260 0 iov 0 0K 28K 78643K 4700 0 mount 1 1K 1K 78643K 1 0 log 0 0K 0K 78643K 4 0 vnodes 1279 80K 80K 78643K 8679 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 9K 78643K 606 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 565 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1697 195K 286K 78643K 12548 0 file desc 23 85K 125K 78643K 43090 0 sigio 0 0K 0K 78643K 971 0 proc 56 78K 127K 78643K 4517 0 subproc 104 6K 6K 78643K 1040 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 2097 0 in_multi 99 7K 7K 78643K 1281 0 ether_multi 1 0K 0K 78643K 78 0 mrt 1 0K 0K 78643K 1 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 259 1155K 1155K 78643K 259 0 exec 0 0K 1K 78643K 6938 0 tdb 3 0K 0K 78643K 3 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 8 62K 64K 78643K 10 0 UVM amap 535 96K 112K 78643K 425855 0 UVM aobj 131 4K 4K 78643K 142 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 997 0 NDP 11 0K 2K 78643K 243 0 temp 74 5920K 6048K 78643K 106078 0 kqueue 12 18K 29K 78643K 3756 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 plcache 128 22 0 0 1 0 1 1 0 8 0 rtpcb 120 1918 0 1915 20 19 1 3 0 8 0 rtentry 112 953 0 839 4 0 4 4 0 8 0 unpcb 144 26297 0 26284 272 271 1 10 0 8 0 syncache 304 712 0 712 83 82 1 1 0 8 1 tcpqe 32 798 0 798 83 82 1 1 0 8 1 tcpcb 808 49609 0 49543 520 506 14 26 0 8 2 arp 120 170 0 151 1 0 1 1 0 8 0 ipq 40 40 0 39 21 20 1 1 0 8 0 ipqe 40 457 0 456 21 20 1 1 0 8 0 inpcb 368 77186 0 77115 572 560 12 23 0 8 0 nd6 136 282 0 255 3 2 1 2 0 8 0 kcovpl 48 80 0 72 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 3828 0 3360 40 10 30 32 0 8 0 art_table 32 3829 0 3360 5 1 4 5 0 8 0 art_node 16 952 0 848 1 0 1 1 0 8 0 sysvmsgpl 40 47 0 11 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 495 0 485 1 0 1 1 0 8 0 shmpl 112 139 0 11 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 56367 0 54852 95 0 95 95 0 8 0 ffsino 272 56367 0 54852 102 0 102 102 0 8 0 nchpl 144 111944 0 110296 63 0 63 63 0 8 0 uvmvnodes 80 5926 0 0 121 0 121 121 0 8 0 vnodes 216 5926 0 0 330 0 330 330 0 8 0 namei 1024 362108 0 362107 13 12 1 2 0 8 0 percpumem 16 115 0 72 1 0 1 1 0 8 0 kstatmem 264 166 0 144 2 0 2 2 0 8 0 scxspl 216 336302 0 336302 76 75 1 8 1 8 1 plimitpl 152 6537 0 6513 68 67 1 2 0 8 0 sigapl 424 43240 0 43185 8 1 7 7 0 8 0 futexpl 64 378378 0 378373 12 11 1 1 0 8 0 knotepl 120 2353 0 0 21 4 17 17 0 8 0 kqueuepl 216 9796 0 9788 167 166 1 9 0 8 0 pipepl 320 10511 0 10483 261 256 5 11 0 8 2 fdescpl 496 43221 0 43187 7 2 5 6 0 8 0 filepl 152 288008 0 287772 475 462 13 22 0 8 3 lockfpl 104 6329 0 6327 5 4 1 2 0 8 0 lockfspl 48 1694 0 1692 1 0 1 1 0 8 0 sessionpl 144 95 0 79 1 0 1 1 0 8 0 pgrppl 48 508 0 492 1 0 1 1 0 8 0 ucredpl 104 38112 0 38094 1 0 1 1 0 8 0 zombiepl 144 43188 0 43185 1 0 1 1 0 8 0 processpl 1072 43240 0 43185 5 1 4 5 0 8 0 procpl 680 121152 0 121075 62 54 8 9 0 8 1 sosppl 168 772 0 769 31 30 1 1 0 8 0 sockpl 488 107383 0 107285 1348 1328 20 41 0 8 1 mcl64k 65536 49 0 0 4 2 2 3 0 8 0 mcl16k 16384 31 0 0 3 0 3 3 0 8 0 mcl12k 12288 66 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 41 0 0 4 1 3 3 0 8 0 mcl4k 4096 177 0 0 8 4 4 7 0 8 0 mcl2k2 2112 54 0 0 3 0 3 3 0 8 0 mcl2k 2048 754 0 0 39 20 19 32 0 8 0 mtagpl 96 8 0 0 1 0 1 1 0 8 0 mbufpl 256 5354 0 0 210 0 210 210 0 8 0 bufpl 288 70233 0 63912 452 0 452 452 0 8 0 anonpl 24 4328376 0 4317162 326 227 99 129 0 186 0 amapchunkpl 152 1348618 0 1347745 338 300 38 50 0 158 2 amappl16 200 92360 0 92035 495 475 20 44 0 8 0 amappl15 192 16 0 16 3 3 0 1 0 8 0 amappl14 184 383 0 366 2 1 1 2 0 8 0 amappl13 176 55 0 52 1 0 1 1 0 8 0 amappl12 168 44984 0 44938 10 7 3 3 0 8 0 amappl11 160 83 0 73 1 0 1 1 0 8 0 amappl10 152 178 0 163 1 0 1 1 0 8 0 amappl9 144 541 0 540 1 0 1 1 0 8 0 amappl8 136 2227 0 1941 12 1 11 11 0 8 0 amappl7 128 555 0 530 2 0 2 2 0 8 0 amappl6 120 1882 0 1858 1 0 1 1 0 8 0 amappl5 112 1047 0 1039 1 0 1 1 0 8 0 amappl4 104 1674 0 1645 2 1 1 2 0 8 0 amappl3 96 262342 0 262239 49 46 3 4 0 8 0 amappl2 88 45876 0 45780 6 3 3 3 0 8 0 amappl1 80 162333 0 161804 22 10 12 22 0 8 0 amappl 88 423351 0 423086 7 0 7 7 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 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 72 141 0 11 3 0 3 3 0 8 0 uaddrrnd 24 43221 0 43187 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 43221 0 43187 1 0 1 1 0 8 0 vmmpekpl 168 338854 0 338792 4 0 4 4 0 8 0 vmmpepl 168 2515472 0 2512844 470 330 140 142 0 357 3 vmsppl 464 43220 0 43187 7 2 5 6 0 8 0 rwobjpl 56 614772 0 607112 129 17 112 114 0 8 0 pdppl 4096 86450 0 86374 1333 1251 82 96 0 8 6 pvpl 32 12351950 0 12334236 932 751 181 345 0 265 0 pmappl 248 43220 0 43187 4 1 3 3 0 8 0 extentpl 40 56 0 38 1 0 1 1 0 8 0 phpool 112 3464 0 2422 31 0 31 31 0 8 0 ddb{1}> machine ddbcpu 0 Stopped at x86_ipi_db+0x1e: addq $0x8,%rsp x86_ipi_db(ffffffff82babff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:158 _kernel_lock_held() at _kernel_lock_held+0x64 sys/kern/kern_lock.c:76 msleep(ffffffff82d0b2f0,ffffffff82bee058,0,ffffffff82785665,0) at msleep+0x136 sys/kern/kern_synch.c:232 softclock_thread(ffff800021168550) at softclock_thread+0xd0 sys/kern/kern_timeout.c:805 end trace frame: 0x0, count: 8 ddb{0}> trace x86_ipi_db(ffffffff82babff0) at x86_ipi_db+0x1e sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xb7 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 kd_curproc sys/dev/kcov.c:590 [inline] __sanitizer_cov_trace_pc() at __sanitizer_cov_trace_pc+0x30 sys/dev/kcov.c:158 _kernel_lock_held() at _kernel_lock_held+0x64 sys/kern/kern_lock.c:76 msleep(ffffffff82d0b2f0,ffffffff82bee058,0,ffffffff82785665,0) at msleep+0x136 sys/kern/kern_synch.c:232 softclock_thread(ffff800021168550) at softclock_thread+0xd0 sys/kern/kern_timeout.c:805 end trace frame: 0x0, count: -7 ddb{0}> machine ddbcpu 1 Stopped at db_enter+0x1c: addq $0x8,%rsp db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ab22d) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82825ecc,ffffffff82875e08,2f7,ffffffff82771d1d) at __assert+0x29 sys/kern/subr_prf.c:157 arptfree(fffffd80714fa698) at arptfree+0x132 sys/netinet/if_ether.c:759 arptimer(ffffffff82d794b8) at arptimer+0x88 sys/netinet/if_ether.c:135 timeout_run(ffffffff82d794b8) at timeout_run+0xd0 sys/kern/kern_timeout.c:665 softclock_thread_mp(ffff800021168000) at softclock_thread_mp+0xc4 sys/kern/kern_timeout.c:833 end trace frame: 0x0, count: 8 ddb{1}> trace db_enter() at db_enter+0x1c sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff827ab22d) at panic+0x17b sys/kern/subr_prf.c:198 __assert(ffffffff82825ecc,ffffffff82875e08,2f7,ffffffff82771d1d) at __assert+0x29 sys/kern/subr_prf.c:157 arptfree(fffffd80714fa698) at arptfree+0x132 sys/netinet/if_ether.c:759 arptimer(ffffffff82d794b8) at arptimer+0x88 sys/netinet/if_ether.c:135 timeout_run(ffffffff82d794b8) at timeout_run+0xd0 sys/kern/kern_timeout.c:665 softclock_thread_mp(ffff800021168000) at softclock_thread_mp+0xc4 sys/kern/kern_timeout.c:833 end trace frame: 0x0, count: -7