kernel: protection fault trap, code=0 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic the kernel did not panic ddb{0}> trace in_delmulti(fff7f7fffffeffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a29100) 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 ifioctl(fffffd806a965d98,80206979,ffff800023dd5a80,ffff800020adf658) at ifioctl+0x3ea sys/net/if.c:1938 fifo_ioctl(ffff800023dd58c8) at fifo_ioctl+0x9c sys/miscfs/fifofs/fifo_vnops.c:276 VOP_IOCTL(fffffd8063b1d6a0,80206979,ffff800023dd5a80,3,fffffd807f7c66c0,ffff800020adf658) at VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 vn_ioctl(fffffd80654ef1c8,80206979,ffff800023dd5a80,ffff800020adf658) at vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 sys_ioctl(ffff800020adf658,ffff800023dd5b98,ffff800023dd5be0) at sys_ioctl+0x5b9 syscall(ffff800023dd5c60) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023dd5c60) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x41230276ec0, count: -12 ddb{0}> show registers rdi 0xffffffff81eee24d in_delmulti+0x8d rsi 0x298c5 acpi_pdirpa+0x1572d rbp 0xffff800023dd55c0 rbx 0 rdx 0x298c6 acpi_pdirpa+0x1572e rcx 0xffff800020b74000 rax 0xffff800020b74000 r8 0xffffffff81342423 rt_ifa_purge+0x153 r9 0x5 r10 0x2f r11 0xb2562030f881dfa7 r12 0 r13 0x3 r14 0xfff7f7fffffeffff r15 0x1 rip 0xffffffff81eee24d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800023dd5560 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{0}> show proc PROC (syz-executor.0) pid=13259 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020adec78,0xffffffff82634898 process=0xffff800020aec700 user=0xffff800023dd0000, vmspace=0xfffffd8063b25d00 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 6781 225997 23897 0 2 0 syz-executor.0 * 6781 13259 23897 0 7 0x4000000 syz-executor.0 57774 485580 67637 0 7 0 syz-executor.1 57774 201437 67637 0 3 0x4000080 fsleep syz-executor.1 57774 131789 67637 0 3 0x4000080 fsleep syz-executor.1 52545 392909 0 0 3 0x14200 bored sosplice 50920 339090 0 0 3 0x14200 acct acct 67637 205488 46481 0 3 0x82 nanosleep syz-executor.1 23897 475801 46481 0 3 0x82 nanosleep syz-executor.0 46481 245765 48773 0 3 0x82 thrsleep syz-fuzzer 46481 255127 48773 0 3 0x4000082 thrsleep syz-fuzzer 46481 209925 48773 0 3 0x4000082 thrsleep syz-fuzzer 46481 160948 48773 0 3 0x4000082 thrsleep syz-fuzzer 46481 289340 48773 0 3 0x4000082 thrsleep syz-fuzzer 46481 41077 48773 0 3 0x4000082 thrsleep syz-fuzzer 46481 66001 48773 0 3 0x4000082 thrsleep syz-fuzzer 46481 148402 48773 0 3 0x4000082 kqread syz-fuzzer 46481 207761 48773 0 3 0x4000082 thrsleep syz-fuzzer 46481 173913 48773 0 3 0x4000082 thrsleep syz-fuzzer 48773 295187 94551 0 3 0x10008a pause ksh 94551 218697 48834 0 3 0x92 select sshd 63453 208843 1 0 3 0x100083 ttyin getty 48834 79147 1 0 3 0x80 select sshd 65223 26781 46521 74 3 0x100092 bpf pflogd 46521 505529 1 0 3 0x80 netio pflogd 16899 14041 63072 73 3 0x100090 kqread syslogd 63072 404950 1 0 3 0x100082 netio syslogd 79110 302792 1 77 2 0x100090 dhclient 51939 265870 1 0 3 0x80 poll dhclient 8195 132371 0 0 2 0x14200 zerothread 11323 473141 0 0 3 0x14200 aiodoned aiodoned 31221 423706 0 0 3 0x14200 syncer update 12062 122671 0 0 3 0x14200 cleaner cleaner 97220 172812 0 0 3 0x14200 reaper reaper 51547 517819 0 0 3 0x14200 pgdaemon pagedaemon 95923 124448 0 0 3 0x14200 bored crynlk 92210 324055 0 0 3 0x14200 bored crypto 36242 2079 0 0 3 0x40014200 acpi0 acpi0 10430 338016 0 0 3 0x40014200 idle1 41748 493005 0 0 3 0x14200 bored softnet 57696 307930 0 0 2 0x14200 systqmp 33666 160821 0 0 3 0x14200 bored systq 4819 127853 0 0 3 0x40014200 bored softclock 90020 42605 0 0 3 0x40014200 idle0 1200 318690 0 0 3 0x14200 bored smr 1 224474 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 6781 (syz-executor.0) thread 0xffff800020adf658 (13259) exclusive rwlock netlock r = 0 (0xffffffff82495598) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 if_detach+0x70 sys/net/if.c:1129 #2 tun_clone_destroy+0x179 sys/net/if_tun.c:312 #3 ifioctl+0x3ea sys/net/if.c:1938 #4 fifo_ioctl+0x9c sys/miscfs/fifofs/fifo_vnops.c:276 #5 VOP_IOCTL+0x88 sys/kern/vfs_vops.c:291 #6 vn_ioctl+0xb7 sys/kern/vfs_vnops.c:533 #7 sys_ioctl+0x5b9 #8 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #8 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #9 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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9507 6412K 7446K 78643K 11361 0 pcb 13 8K 8K 78643K 82 0 rtable 103 4K 4K 78643K 277 0 ifaddr 72 15K 16K 78643K 112 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1485 0 iov 0 0K 12K 78643K 63 0 mount 1 1K 1K 78643K 1 0 vnodes 1239 78K 78K 78643K 1462 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 52 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 6 17K 25K 78643K 269 0 sigio 0 0K 0K 78643K 10 0 proc 61 63K 95K 78643K 446 0 subproc 32 2K 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 32 0 in_multi 70 3K 3K 78643K 81 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 72 318K 318K 78643K 72 0 exec 0 0K 1K 78643K 238 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 138 83K 84K 78643K 2148 0 UVM aobj 19 2K 2K 78643K 20 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 44 0 NDP 10 0K 0K 78643K 21 0 temp 128 3018K 3086K 78643K 7751 0 kqueue 0 0K 0K 78643K 6 0 SYN cache 2 16K 16K 78643K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 6 0 2 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 38 0 36 1 0 1 1 0 8 0 rtentry 112 45 0 5 2 0 2 2 0 8 0 unpcb 120 220 0 205 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 sackhl 24 2 0 2 1 0 1 1 0 8 1 tcpqe 32 311 0 311 1 1 0 1 0 8 0 tcpcb 544 93 0 89 1 0 1 1 0 8 0 inpcb 280 456 0 448 3 0 3 3 0 8 2 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 6 0 6 2 1 1 1 0 8 1 pffrag 232 12 0 12 2 1 1 1 0 482 1 pffrnode 88 12 0 12 2 1 1 1 0 8 1 pffrent 40 287 0 287 2 1 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 34 0 4 1 0 1 1 0 8 0 pfstkey 112 34 0 4 1 0 1 1 0 8 0 pfstate 328 34 0 4 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 256 212 0 0 14 0 14 14 0 8 0 art_table 32 213 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 48 0 22 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 44 0 34 1 0 1 1 0 8 0 shmpl 112 18 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1858 0 445 46 0 46 46 0 8 0 ffsino 272 1858 0 445 95 0 95 95 0 8 0 nchpl 144 2547 0 922 61 0 61 61 0 8 0 uvmvnodes 72 2085 0 0 38 0 38 38 0 8 0 vnodes 208 2085 0 0 110 0 110 110 0 8 0 namei 1024 7254 0 7254 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 6 0 0 1 0 1 1 0 8 0 vmpool 560 6 0 0 1 0 1 1 0 8 0 scsiplug 64 1 0 1 1 1 0 1 0 8 0 scxspl 192 7621 0 7621 7 4 3 6 0 8 3 plimitpl 152 40 0 32 1 0 1 1 0 8 0 sigapl 432 468 0 452 3 1 2 3 0 8 0 futexpl 56 6213 0 6211 1 0 1 1 0 8 0 knotepl 112 111 0 92 1 0 1 1 0 8 0 kqueuepl 104 63 0 61 1 0 1 1 0 8 0 pipepl 160 310 0 291 3 1 2 2 0 8 1 fdescpl 488 469 0 452 3 0 3 3 0 8 0 filepl 152 3671 0 3561 6 0 6 6 0 8 1 lockfpl 104 107 0 105 1 0 1 1 0 8 0 lockfspl 48 40 0 38 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 20 0 9 1 0 1 1 0 8 0 ucredpl 96 310 0 301 1 0 1 1 0 8 0 zombiepl 144 452 0 452 1 0 1 1 0 8 1 processpl 896 486 0 452 4 0 4 4 0 8 0 procpl 632 1107 0 1061 5 0 5 5 0 8 0 srpgc 64 2 0 0 1 0 1 1 0 8 0 sosppl 128 20 0 20 2 1 1 1 0 8 1 sockpl 384 726 0 701 5 0 5 5 0 8 2 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 4 0 0 1 0 1 1 0 8 0 mcl12k 12288 1 0 0 1 0 1 1 0 8 0 mcl9k 9216 1 0 0 1 0 1 1 0 8 0 mcl8k 8192 4 0 0 1 0 1 1 0 8 0 mcl4k 4096 10 0 0 2 0 2 2 0 8 0 mcl2k2 2112 1 0 0 1 0 1 1 0 8 0 mcl2k 2048 162 0 0 20 0 20 20 0 8 0 mtagpl 80 33 0 0 1 0 1 1 0 8 0 mbufpl 256 317 0 0 19 0 19 19 0 8 0 bufpl 280 7372 0 1343 431 0 431 431 0 8 0 anonpl 16 64348 0 43706 99 1 98 98 0 125 15 amapchunkpl 152 19481 0 18924 27 1 26 26 0 158 4 amappl16 192 2498 0 1374 67 3 64 67 0 8 7 amappl15 184 179 0 173 1 0 1 1 0 8 0 amappl14 176 27 0 26 1 0 1 1 0 8 0 amappl12 160 5 0 2 1 0 1 1 0 8 0 amappl11 152 55 0 39 1 0 1 1 0 8 0 amappl10 144 133 0 128 1 0 1 1 0 8 0 amappl9 136 606 0 601 1 0 1 1 0 8 0 amappl8 128 139 0 109 2 0 2 2 0 8 0 amappl7 120 237 0 223 1 0 1 1 0 8 0 amappl6 112 65 0 56 1 0 1 1 0 8 0 amappl5 104 137 0 123 1 0 1 1 0 8 0 amappl4 96 723 0 691 1 0 1 1 0 8 0 amappl3 88 123 0 116 1 0 1 1 0 8 0 amappl2 80 2983 0 2900 3 1 2 3 0 8 0 amappl1 72 20571 0 20093 27 17 10 21 0 8 0 amappl 80 1542 0 1488 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 19 0 1 1 0 1 1 0 8 0 uaddrrnd 24 475 0 452 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 475 0 452 1 0 1 1 0 8 0 vmmpekpl 168 7620 0 7581 2 0 2 2 0 8 0 vmmpepl 168 65897 0 63462 141 18 123 133 0 357 17 vmsppl 368 474 0 452 3 0 3 3 0 8 0 pdppl 4096 957 0 910 7 0 7 7 0 8 1 pvpl 32 201579 0 177688 225 0 225 225 0 265 32 pmappl 232 474 0 452 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 173 0 3 5 0 5 5 0 8 0