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(bfffbfffbfffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a5b000) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000a1b000) at in_ifdetach+0x74 sys/netinet/in.c:969 if_setrdomain(ffff800000a1b000,6) at if_setrdomain+0x19a sys/net/if.c:1888 ifioctl(fffffd806f66a480,8020699f,ffff800023bcb2c0,ffff800020ac13d8) at ifioctl+0x16ad sys/net/if.c:2148 sys_ioctl(ffff800020ac13d8,ffff800023bcb3d8,ffff800023bcb420) at sys_ioctl+0x5b9 syscall(ffff800023bcb4a0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023bcb4a0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x4ab0bad34c0, count: -8 ddb{1}> show registers rdi 0xffffffff81eee24d in_delmulti+0x8d rsi 0x323f2 acpi_pdirpa+0x1e25a rbp 0xffff800023bcb0e0 rbx 0 rdx 0x323f3 acpi_pdirpa+0x1e25b rcx 0xffff800021d92000 rax 0xffff800021d92000 r8 0xffffffff81342423 rt_ifa_purge+0x153 r9 0x5 r10 0x2f r11 0x224a767ec4682e76 r12 0 r13 0x3 r14 0xbfffbfffbfffffff r15 0x1 rip 0xffffffff81eee24d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800023bcb080 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{1}> show proc PROC (syz-executor.1) pid=317882 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020a6e280,0xffffffff82634898 process=0xffff800020aec000 user=0xffff800023bc6000, vmspace=0xfffffd807f008450 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 51048 198256 16123 0 2 0 syz-executor.1 *51048 317882 16123 0 7 0x4000000 syz-executor.1 16123 511330 5556 0 3 0x82 nanosleep syz-executor.1 49197 490739 0 0 3 0x14200 acct acct 44870 179763 0 0 3 0x14200 bored sosplice 92473 83315 5556 0 2 0x2 syz-executor.0 5556 16079 50258 0 3 0x82 thrsleep syz-fuzzer 5556 479423 50258 0 3 0x4000082 nanosleep syz-fuzzer 5556 340750 50258 0 3 0x4000082 thrsleep syz-fuzzer 5556 226333 50258 0 7 0x4000002 syz-fuzzer 5556 251090 50258 0 3 0x4000082 nanosleep syz-fuzzer 5556 3984 50258 0 3 0x4000082 thrsleep syz-fuzzer 5556 410050 50258 0 3 0x4000082 thrsleep syz-fuzzer 5556 394886 50258 0 3 0x4000082 thrsleep syz-fuzzer 5556 398865 50258 0 3 0x4000082 thrsleep syz-fuzzer 5556 156615 50258 0 3 0x4000082 thrsleep syz-fuzzer 50258 318938 29739 0 3 0x10008a pause ksh 29739 368111 31366 0 3 0x92 select sshd 97288 137733 1 0 3 0x100083 ttyin getty 31366 476277 1 0 3 0x80 select sshd 18258 433843 69702 74 3 0x100092 bpf pflogd 69702 272022 1 0 3 0x80 netio pflogd 28829 460632 83690 73 3 0x100090 kqread syslogd 83690 76581 1 0 3 0x100082 netio syslogd 5599 247636 1 77 2 0x100090 dhclient 15508 168017 1 0 3 0x80 poll dhclient 58612 318781 0 0 3 0x14200 pgzero zerothread 86811 2607 0 0 3 0x14200 aiodoned aiodoned 26485 430761 0 0 3 0x14200 syncer update 16745 295917 0 0 3 0x14200 cleaner cleaner 37063 307436 0 0 3 0x14200 reaper reaper 58964 356564 0 0 3 0x14200 pgdaemon pagedaemon 76494 179636 0 0 3 0x14200 bored crynlk 24795 519948 0 0 3 0x14200 bored crypto 30750 369480 0 0 3 0x40014200 acpi0 acpi0 48037 304899 0 0 3 0x40014200 idle1 38415 479505 0 0 3 0x14200 bored softnet 43819 78873 0 0 2 0x14200 systqmp 70352 438951 0 0 3 0x14200 bored systq 88009 516858 0 0 3 0x40014200 bored softclock 96896 251344 0 0 3 0x40014200 idle0 68990 238695 0 0 3 0x14200 bored smr 1 241248 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks Process 51048 (syz-executor.1) thread 0xffff800020ac13d8 (317882) exclusive rwlock netlock r = 0 (0xffffffff82495598) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 ifioctl+0x16a0 sys/net/if.c:2148 #2 sys_ioctl+0x5b9 #3 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #3 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #4 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 0 (0xffffffff826563c0) #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 devbuf 9501 6409K 7699K 78643K 10931 0 pcb 13 8K 8K 78643K 64 0 rtable 105 4K 4K 78643K 359 0 ifaddr 70 15K 15K 78643K 143 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1484 0 iov 0 0K 16K 78643K 42 0 mount 1 1K 1K 78643K 1 0 vnodes 1234 78K 78K 78643K 1348 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 7 0 VM map 2 1K 1K 78643K 2 0 sem 12 1K 1K 78643K 27 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 191 0 sigio 0 0K 0K 78643K 2 0 proc 60 63K 83K 78643K 498 0 subproc 32 2K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 10 0 in_multi 64 3K 3K 78643K 80 0 ether_multi 1 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 54 238K 238K 78643K 54 0 exec 0 0K 1K 78643K 239 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 124 38K 44K 78643K 1641 0 UVM aobj 18 2K 2K 78643K 18 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 38 0 NDP 10 0K 0K 78643K 28 0 temp 129 3022K 3086K 78643K 13162 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 11 0 7 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 47 0 45 1 0 1 1 0 8 0 rtentry 112 65 0 24 2 0 2 2 0 8 0 unpcb 120 128 0 118 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpcb 544 237 0 233 4 1 3 4 0 8 2 inpcb 280 670 0 662 5 1 4 4 0 8 3 nd6 48 6 0 2 1 0 1 1 0 8 0 ppxss 1128 8 0 8 1 0 1 1 0 8 1 pffrag 232 12 0 12 1 0 1 1 0 482 1 pffrnode 88 12 0 12 1 0 1 1 0 8 1 pffrent 40 457 0 457 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 30 0 3 1 0 1 1 0 8 0 pfstkey 112 30 0 3 1 0 1 1 0 8 0 pfstate 328 30 0 3 3 0 3 3 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 277 0 53 15 0 15 15 0 8 0 art_table 32 279 0 53 2 0 2 2 0 8 0 art_node 16 64 0 23 1 0 1 1 0 8 0 sysvmsgpl 40 30 0 13 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 16 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1679 0 269 46 0 46 46 0 8 0 ffsino 272 1679 0 269 95 0 95 95 0 8 0 nchpl 144 2148 0 541 61 0 61 61 0 8 0 uvmvnodes 72 1810 0 0 33 0 33 33 0 8 0 vnodes 208 1810 0 0 96 0 96 96 0 8 0 namei 1024 6012 0 6012 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 560 4 0 0 1 0 1 1 0 8 0 scxspl 192 5937 0 5937 7 6 1 6 0 8 1 plimitpl 152 30 0 22 1 0 1 1 0 8 0 sigapl 432 387 0 372 3 1 2 3 0 8 0 futexpl 56 4751 0 4751 1 0 1 1 0 8 1 knotepl 112 84 0 65 1 0 1 1 0 8 0 kqueuepl 104 40 0 38 1 0 1 1 0 8 0 pipepl 160 272 0 253 2 0 2 2 0 8 1 fdescpl 488 388 0 372 3 0 3 3 0 8 0 filepl 152 2882 0 2781 6 0 6 6 0 8 2 lockfpl 104 69 0 68 1 0 1 1 0 8 0 lockfspl 48 21 0 20 1 0 1 1 0 8 0 sessionpl 112 19 0 8 1 0 1 1 0 8 0 pgrppl 48 65 0 54 1 0 1 1 0 8 0 ucredpl 96 230 0 221 1 0 1 1 0 8 0 zombiepl 144 372 0 372 1 0 1 1 0 8 1 processpl 896 405 0 372 4 0 4 4 0 8 0 procpl 632 794 0 751 5 0 5 5 0 8 1 srpgc 64 4 0 2 1 0 1 1 0 8 0 sosppl 128 5 0 5 1 0 1 1 0 8 1 sockpl 384 855 0 835 7 1 6 7 0 8 4 mcl64k 65536 8 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl12k 12288 2 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 5 0 0 1 0 1 1 0 8 0 mcl2k2 2112 2 0 0 1 0 1 1 0 8 0 mcl2k 2048 171 0 0 21 0 21 21 0 8 0 mtagpl 80 10 0 0 1 0 1 1 0 8 0 mbufpl 256 338 0 0 21 0 21 21 0 8 0 bufpl 280 6642 0 1340 379 0 379 379 0 8 0 anonpl 16 62815 0 42784 90 6 84 89 0 125 3 amapchunkpl 152 2462 0 2299 14 1 13 13 0 158 5 amappl16 192 1934 0 847 61 5 56 61 0 8 1 amappl15 184 138 0 134 1 0 1 1 0 8 0 amappl14 176 41 0 40 1 0 1 1 0 8 0 amappl12 160 39 0 36 1 0 1 1 0 8 0 amappl11 152 61 0 46 1 0 1 1 0 8 0 amappl10 144 25 0 17 1 0 1 1 0 8 0 amappl9 136 652 0 648 1 0 1 1 0 8 0 amappl8 128 183 0 153 2 0 2 2 0 8 0 amappl7 120 120 0 105 1 0 1 1 0 8 0 amappl6 112 60 0 51 1 0 1 1 0 8 0 amappl5 104 174 0 158 1 0 1 1 0 8 0 amappl4 96 644 0 615 1 0 1 1 0 8 0 amappl3 88 121 0 113 1 0 1 1 0 8 0 amappl2 80 2218 0 2142 3 1 2 3 0 8 0 amappl1 72 18749 0 18311 26 16 10 20 0 8 0 amappl 80 1075 0 1026 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 17 0 0 1 0 1 1 0 8 0 uaddrrnd 24 392 0 372 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 392 0 372 1 0 1 1 0 8 0 vmmpekpl 168 7140 0 7106 3 1 2 2 0 8 0 vmmpepl 168 56665 0 54394 154 11 143 143 0 357 40 vmsppl 368 391 0 372 2 0 2 2 0 8 0 pdppl 4096 791 0 748 6 0 6 6 0 8 0 pvpl 32 189034 0 165798 208 5 203 208 0 265 14 pmappl 232 391 0 372 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 178 0 4 5 0 5 5 0 8 0