kernel: protection fault trap, code=0 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic the kernel did not panic ddb{1}> trace in_delmulti(bf3fffffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a24800) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff8000009c1000) at in_ifdetach+0x74 sys/netinet/in.c:969 if_detach(ffff8000009c1000) at if_detach+0x140 sys/net/if.c:1151 tun_clone_destroy(ffff8000009c1000) at tun_clone_destroy+0x179 sys/net/if_tun.c:312 spec_close(ffff800021b8ee40) at spec_close+0x311 sys/kern/spec_vnops.c:555 VOP_CLOSE(fffffd806e68e278,7,fffffd807f7c6600,ffff800020ace780) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:175 vn_closefile(fffffd806a035e58,ffff800020ace780) at vn_closefile+0xd8 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd806a035e58,ffff800020ace780) at vn_closefile+0xd8 sys/kern/vfs_vnops.c:610 fdrop(fffffd806a035e58,ffff800020ace780) at fdrop+0xc2 sys/kern/kern_descrip.c:1273 closef(fffffd806a035e58,ffff800020ace780) at closef+0x11d sys/kern/kern_descrip.c:1257 fdfree(ffff800020ace780) at fdfree+0x101 sys/kern/kern_descrip.c:1189 exit1(ffff800020ace780,0,1) at exit1+0x32f sys/kern/kern_exit.c:196 sys_exit(ffff800020ace780,ffff800021b8f0d0,ffff800021b8f120) at sys_exit+0x17 sys/kern/kern_exit.c:94 syscall(ffff800021b8f1a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021b8f1a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffc5f70, count: -15 ddb{1}> show registers rdi 0x2 rsi 0 rbp 0xffff800021b8ec70 rbx 0 rdx 0xffff800020ace780 rcx 0 rax 0 r8 0xffffffff81342423 rt_ifa_purge+0x153 r9 0x5 r10 0x2f r11 0x5c87cd6dd32a696d r12 0 r13 0x3 r14 0xbf3fffffffffffff r15 0x1 rip 0xffffffff81eee24d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021b8ec10 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> show proc PROC (syz-executor.1) pid=339545 stat=onproc flags process=1008 proc=2000 pri=26, usrpri=58, nice=20 forw=0xffffffffffffffff, list=0xffff800020acfb40,0xffffffff82634898 process=0xffff800020aed500 user=0xffff800021b8a000, vmspace=0xfffffd807f008a10 estcpu=8, cpticks=12, pctcpu=0.11 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 16168 114912 0 0 3 0x14200 acct acct 42243 325873 0 0 3 0x14200 bored sosplice 83163 62453 13296 0 3 0x82 piperd syz-executor.0 13296 402583 86228 0 3 0x82 thrsleep syz-fuzzer 13296 84199 86228 0 3 0x4000082 thrsleep syz-fuzzer 13296 488478 86228 0 3 0x4000082 thrsleep syz-fuzzer 13296 13988 86228 0 3 0x4000082 thrsleep syz-fuzzer 13296 69607 86228 0 2 0x4000082 syz-fuzzer 13296 371912 86228 0 3 0x4000082 thrsleep syz-fuzzer 13296 55082 86228 0 3 0x4000082 thrsleep syz-fuzzer 13296 197544 86228 0 3 0x4000082 thrsleep syz-fuzzer 13296 416067 86228 0 3 0x4000082 thrsleep syz-fuzzer 13296 75137 86228 0 3 0x4000082 thrsleep syz-fuzzer 86228 146472 97534 0 3 0x10008a pause ksh 97534 477876 30314 0 3 0x92 select sshd 13730 53668 1 0 3 0x100083 ttyin getty 30314 190168 1 0 3 0x80 select sshd 98305 7163 71910 74 3 0x100092 bpf pflogd 71910 419714 1 0 3 0x80 netio pflogd 90426 122521 49757 73 3 0x100090 kqread syslogd 49757 68063 1 0 3 0x100082 netio syslogd 62278 5758 1 77 2 0x100090 dhclient 65713 405077 1 0 3 0x80 poll dhclient 67165 369632 0 0 2 0x14200 zerothread 45428 341733 0 0 3 0x14200 aiodoned aiodoned 72004 73798 0 0 3 0x14200 syncer update 296 434469 0 0 3 0x14200 cleaner cleaner 59118 27033 0 0 7 0x14200 reaper 47672 167316 0 0 3 0x14200 pgdaemon pagedaemon 72125 428512 0 0 3 0x14200 bored crynlk 4690 243214 0 0 3 0x14200 bored crypto 57668 60655 0 0 3 0x40014200 acpi0 acpi0 90609 287853 0 0 3 0x40014200 idle1 12876 451473 0 0 2 0x14200 softnet 24144 328969 0 0 3 0x14200 bored systqmp 69184 191547 0 0 3 0x14200 bored systq 36837 64021 0 0 3 0x40014200 bored softclock 46001 231770 0 0 3 0x40014200 idle0 88326 514146 0 0 3 0x14200 bored smr 1 35415 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks ddb{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9490 6412K 6667K 78643K 10830 0 pcb 13 8K 8K 78643K 78 0 rtable 102 3K 3K 78643K 275 0 ifaddr 56 12K 12K 78643K 84 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1475 0 iov 0 0K 28K 78643K 222 0 mount 1 1K 1K 78643K 1 0 vnodes 1215 76K 77K 78643K 1306 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 4 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 25 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 4 9K 25K 78643K 165 0 sigio 0 0K 0K 78643K 4 0 proc 60 63K 95K 78643K 446 0 subproc 23 1K 2K 78643K 34 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 38 0 in_multi 43 2K 2K 78643K 71 0 ether_multi 1 0K 0K 78643K 7 0 mrt 0 0K 0K 78643K 3 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 66 291K 291K 78643K 66 0 exec 0 0K 1K 78643K 219 0 pagedep 1 8K 8K 78643K 1 0 inodedep 1 32K 32K 78643K 1 0 newblk 1 0K 0K 78643K 1 0 VM swap 7 26K 26K 78643K 7 0 UVM amap 114 22K 22K 78643K 1489 0 UVM aobj 10 2K 2K 78643K 10 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 55 0 NDP 8 0K 0K 78643K 18 0 temp 111 3015K 3081K 78643K 8015 0 kqueue 0 0K 0K 78643K 2 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 arp 64 6 0 1 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 37 0 35 1 0 1 1 0 8 0 rtentry 112 52 0 11 2 0 2 2 0 8 0 unpcb 120 93 0 83 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 10 0 10 1 1 0 1 0 8 0 tcpcb 544 84 0 80 1 0 1 1 0 8 0 inpcb 280 266 0 259 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 0 1 1 0 8 1 nd6 48 5 0 2 1 0 1 1 0 8 0 pffrag 232 5 0 5 1 0 1 1 0 482 1 pffrnode 88 5 0 5 1 0 1 1 0 8 1 pffrent 40 225 0 225 1 0 1 1 0 8 1 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 29 0 0 1 0 1 1 0 8 0 pfstkey 112 29 0 0 1 0 1 1 0 8 0 pfstate 328 29 0 0 3 0 3 3 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 256 242 0 41 15 0 15 15 0 8 0 art_table 32 243 0 41 2 0 2 2 0 8 0 art_node 16 51 0 13 1 0 1 1 0 8 0 sysvmsgpl 40 3 0 3 1 0 1 1 0 8 1 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 15 0 5 1 0 1 1 0 8 0 shmpl 112 8 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1637 0 226 46 0 46 46 0 8 0 ffsino 272 1637 0 226 95 0 95 95 0 8 0 nchpl 144 2119 0 495 61 0 61 61 0 8 0 uvmvnodes 72 1732 0 0 32 0 32 32 0 8 0 vnodes 208 1732 0 0 92 0 92 92 0 8 0 namei 1024 5739 0 5739 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 scsiplug 64 2 0 2 1 1 0 1 0 8 0 scxspl 192 5742 0 5742 8 2 6 7 0 8 6 plimitpl 152 17 0 9 1 0 1 1 0 8 0 sigapl 432 364 0 350 3 1 2 3 0 8 0 futexpl 56 3210 0 3210 1 0 1 1 0 8 1 knotepl 112 66 0 47 1 0 1 1 0 8 0 kqueuepl 104 30 0 28 1 0 1 1 0 8 0 pipepl 160 222 0 206 2 0 2 2 0 8 1 fdescpl 488 365 0 350 3 0 3 3 0 8 0 filepl 152 2391 0 2303 6 0 6 6 0 8 2 lockfpl 104 55 0 54 1 0 1 1 0 8 0 lockfspl 48 19 0 18 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 24 0 13 1 0 1 1 0 8 0 ucredpl 96 228 0 219 1 0 1 1 0 8 0 zombiepl 144 351 0 349 1 0 1 1 0 8 0 processpl 896 382 0 349 4 0 4 4 0 8 0 procpl 632 712 0 669 5 0 5 5 0 8 1 sosppl 128 2 0 2 1 0 1 1 0 8 1 sockpl 384 399 0 380 4 0 4 4 0 8 2 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 1 0 0 1 0 1 1 0 8 0 mcl12k 12288 4 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 4 0 0 1 0 1 1 0 8 0 mcl2k2 2112 3 0 0 1 0 1 1 0 8 0 mcl2k 2048 178 0 0 22 0 22 22 0 8 0 mtagpl 80 9 0 0 1 0 1 1 0 8 0 mbufpl 256 366 0 0 22 0 22 22 0 8 0 bufpl 280 6582 0 1342 375 0 375 375 0 8 0 anonpl 16 52256 0 31995 87 1 86 86 0 125 4 amapchunkpl 152 1939 0 1770 9 1 8 9 0 158 0 amappl16 192 1728 0 629 58 0 58 58 0 8 2 amappl15 184 187 0 182 1 0 1 1 0 8 0 amappl14 176 35 0 34 1 0 1 1 0 8 0 amappl13 168 1 0 0 1 0 1 1 0 8 0 amappl12 160 9 0 8 2 1 1 1 0 8 0 amappl11 152 55 0 39 1 0 1 1 0 8 0 amappl10 144 12 0 7 1 0 1 1 0 8 0 amappl9 136 669 0 665 1 0 1 1 0 8 0 amappl8 128 192 0 170 1 0 1 1 0 8 0 amappl7 120 103 0 90 1 0 1 1 0 8 0 amappl6 112 64 0 56 1 0 1 1 0 8 0 amappl5 104 130 0 115 1 0 1 1 0 8 0 amappl4 96 618 0 586 1 0 1 1 0 8 0 amappl3 88 121 0 114 1 0 1 1 0 8 0 amappl2 80 2090 0 2016 3 1 2 3 0 8 0 amappl1 72 18118 0 17654 26 16 10 21 0 8 0 amappl 80 968 0 918 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 9 0 0 1 0 1 1 0 8 0 uaddrrnd 24 365 0 350 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 365 0 350 1 0 1 1 0 8 0 vmmpekpl 168 6718 0 6681 2 0 2 2 0 8 0 vmmpepl 168 52683 0 50456 138 9 129 133 0 357 25 vmsppl 368 364 0 350 2 0 2 2 0 8 0 pdppl 4096 737 0 700 6 0 6 6 0 8 0 pvpl 32 167982 0 144086 201 0 201 201 0 265 8 pmappl 232 364 0 350 2 1 1 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 176 0 3 5 0 5 5 0 8 0