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(bffffff7ffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000a0ea00) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000a10800) at in_ifdetach+0x74 sys/netinet/in.c:969 ifioctl(fffffd806f672300,801169ac,ffff800021bad820,ffff800020acec70) at ifioctl+0x1473 sys/net/if.c:1983 sys_ioctl(ffff800020acec70,ffff800021bad938,ffff800021bad980) at sys_ioctl+0x5b9 syscall(ffff800021bada00) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800021bada00) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcaa0e79d980, count: -7 ddb{0}> show registers rdi 0xffffffff81eee24d in_delmulti+0x8d rsi 0x5a4 rbp 0xffff800021bad6b0 rbx 0 rdx 0x5a5 rcx 0xffff800022d84000 rax 0xffff800022d84000 r8 0xffffffff81342423 rt_ifa_purge+0x153 r9 0x5 r10 0x2f r11 0x9afc01bdb462f86a r12 0 r13 0x3 r14 0xbffffff7ffffffff r15 0x1 rip 0xffffffff81eee24d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff800021bad650 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb{0}> show proc PROC (syz-executor.1) pid=145142 stat=onproc flags process=0 proc=4000000 pri=81, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff800020ace780,0xffffffff82634898 process=0xffff800020aed180 user=0xffff800021ba8000, vmspace=0xfffffd8060d92b90 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10017 210914 81165 0 7 0 syz-executor.1 *10017 145142 81165 0 7 0x4000000 syz-executor.1 81136 95027 0 0 3 0x14200 bored sosplice 81165 348879 70405 0 3 0x82 nanosleep syz-executor.1 42444 330067 70405 0 3 0x82 nanosleep syz-executor.0 70405 108873 51028 0 3 0x82 thrsleep syz-fuzzer 70405 372819 51028 0 3 0x4000082 thrsleep syz-fuzzer 70405 201657 51028 0 3 0x4000082 thrsleep syz-fuzzer 70405 113152 51028 0 3 0x4000082 thrsleep syz-fuzzer 70405 56986 51028 0 3 0x4000082 thrsleep syz-fuzzer 70405 264437 51028 0 3 0x4000082 kqread syz-fuzzer 70405 121177 51028 0 3 0x4000082 thrsleep syz-fuzzer 70405 14551 51028 0 3 0x4000082 thrsleep syz-fuzzer 70405 491619 51028 0 3 0x4000082 thrsleep syz-fuzzer 70405 134357 51028 0 3 0x4000082 thrsleep syz-fuzzer 51028 236625 86151 0 3 0x10008a pause ksh 86151 329351 55370 0 3 0x92 select sshd 56353 302482 1 0 3 0x100083 ttyin getty 55370 390093 1 0 3 0x80 select sshd 28102 229748 76795 74 3 0x100092 bpf pflogd 76795 76789 1 0 3 0x80 netio pflogd 6677 217139 33819 73 3 0x100090 kqread syslogd 33819 389712 1 0 3 0x100082 netio syslogd 94020 266739 1 77 3 0x100090 poll dhclient 18659 253376 1 0 3 0x80 poll dhclient 83523 10963 0 0 3 0x14200 pgzero zerothread 98390 175156 0 0 3 0x14200 aiodoned aiodoned 98353 8630 0 0 3 0x14200 syncer update 71647 197750 0 0 3 0x14200 cleaner cleaner 47744 59626 0 0 3 0x14200 reaper reaper 50018 139045 0 0 3 0x14200 pgdaemon pagedaemon 52513 511723 0 0 3 0x14200 bored crynlk 93062 378614 0 0 3 0x14200 bored crypto 39681 406034 0 0 3 0x40014200 acpi0 acpi0 89459 291884 0 0 3 0x40014200 idle1 45531 252220 0 0 3 0x14200 bored softnet 39720 4683 0 0 3 0x14200 bored systqmp 14433 262308 0 0 3 0x14200 bored systq 16719 136885 0 0 3 0x40014200 bored softclock 67492 471974 0 0 3 0x40014200 idle0 75771 233896 0 0 3 0x14200 bored smr 1 504110 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 10017 (syz-executor.1) thread 0xffff800020acec70 (145142) exclusive rwlock netlock r = 0 (0xffffffff82495598) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 ifioctl+0x104b sys/net/if.c:1979 #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{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9583 7578K 7578K 78643K 11285 0 pcb 13 8K 8K 78643K 60 0 rtable 102 12K 12K 78643K 307 0 ifaddr 86 15K 16K 78643K 122 0 counters 39 33K 33K 78643K 39 0 ioctlops 0 0K 4K 78643K 1491 0 iov 0 0K 48K 78643K 130 0 mount 1 1K 1K 78643K 1 0 vnodes 1217 76K 77K 78643K 1527 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 9 0 VM map 2 1K 1K 78643K 2 0 sem 12 0K 1K 78643K 92 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 196K 290K 78643K 12766 0 file desc 5 13K 25K 78643K 267 0 sigio 0 0K 0K 78643K 23 0 proc 61 63K 83K 78643K 469 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 85 0 in_multi 51 2K 3K 78643K 91 0 ether_multi 1 0K 0K 78643K 4 0 mrt 0 0K 0K 78643K 4 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 78 344K 344K 78643K 78 0 exec 0 0K 1K 78643K 247 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 132 71K 71K 78643K 1962 0 UVM aobj 35 2K 2K 78643K 39 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 58 0 NDP 15 0K 0K 78643K 26 0 temp 149 3023K 3663K 78643K 25234 0 kqueue 0 0K 0K 78643K 1 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 37 0 35 1 0 1 1 0 8 0 rtentry 112 55 0 17 2 0 2 2 0 8 0 unpcb 120 218 0 208 1 0 1 1 0 8 0 syncache 264 8 0 8 3 2 1 1 0 8 1 tcpqe 32 33 0 33 3 2 1 1 0 8 1 tcpcb 544 121 0 117 1 0 1 1 0 8 0 inpcb 280 409 0 401 3 1 2 2 0 8 1 rttmr 72 2 0 2 1 0 1 1 0 8 1 nd6 48 6 0 3 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 ppxss 1128 3 0 3 2 1 1 1 0 8 1 pffrag 232 9 0 9 3 2 1 1 0 482 1 pffrnode 88 9 0 9 3 2 1 1 0 8 1 pffrent 40 362 0 362 3 2 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 31 0 6 1 0 1 1 0 8 0 pfstkey 112 31 0 6 1 0 1 1 0 8 0 pfstate 328 31 0 6 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 256 278 0 67 14 0 14 14 0 8 0 art_table 32 279 0 67 2 0 2 2 0 8 0 art_node 16 54 0 19 1 0 1 1 0 8 0 sysvmsgpl 40 36 0 22 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 88 0 78 1 0 1 1 0 8 0 shmpl 112 37 0 4 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1967 0 563 46 0 46 46 0 8 0 ffsino 272 1967 0 563 95 0 95 95 0 8 0 nchpl 144 2586 0 966 61 0 61 61 0 8 0 uvmvnodes 72 2148 0 0 40 0 40 40 0 8 0 vnodes 208 2148 0 0 114 0 114 114 0 8 0 namei 1024 8679 0 8679 1 0 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 9 0 0 2 0 2 2 0 8 0 vmpool 560 9 0 0 1 0 1 1 0 8 0 scsiplug 64 4 0 4 1 1 0 1 0 8 0 scxspl 192 7752 0 7752 8 7 1 5 0 8 1 plimitpl 152 35 0 27 1 0 1 1 0 8 0 sigapl 432 466 0 451 3 1 2 3 0 8 0 futexpl 56 7481 0 7481 1 0 1 1 0 8 1 knotepl 112 83 0 64 1 0 1 1 0 8 0 kqueuepl 104 101 0 99 1 0 1 1 0 8 0 pipepl 160 406 0 387 3 1 2 2 0 8 1 fdescpl 488 467 0 451 3 0 3 3 0 8 0 filepl 152 4565 0 4463 8 2 6 7 0 8 2 lockfpl 104 230 0 229 1 0 1 1 0 8 0 lockfspl 48 71 0 70 1 0 1 1 0 8 0 sessionpl 112 18 0 7 1 0 1 1 0 8 0 pgrppl 48 27 0 16 1 0 1 1 0 8 0 ucredpl 96 1366 0 1356 1 0 1 1 0 8 0 zombiepl 144 452 0 451 1 0 1 1 0 8 0 processpl 896 484 0 451 4 0 4 4 0 8 0 procpl 632 1144 0 1101 6 1 5 5 0 8 1 sockpl 384 683 0 663 7 3 4 5 0 8 2 mcl64k 65536 11 0 0 2 0 2 2 0 8 0 mcl16k 16384 2 0 0 1 0 1 1 0 8 0 mcl12k 12288 14 0 0 2 0 2 2 0 8 0 mcl9k 9216 3 0 0 1 0 1 1 0 8 0 mcl8k 8192 5 0 0 1 0 1 1 0 8 0 mcl4k 4096 7 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 24 0 0 1 0 1 1 0 8 0 mbufpl 256 378 0 0 22 0 22 22 0 8 0 bufpl 280 7319 0 1340 428 0 428 428 0 8 0 anonpl 16 75540 0 55062 101 3 98 99 0 125 14 amapchunkpl 152 2798 0 2629 12 3 9 10 0 158 0 amappl16 192 2927 0 1808 74 11 63 67 0 8 6 amappl15 184 321 0 313 1 0 1 1 0 8 0 amappl14 176 28 0 27 1 0 1 1 0 8 0 amappl12 160 4 0 3 2 1 1 1 0 8 0 amappl11 152 50 0 35 1 0 1 1 0 8 0 amappl10 144 126 0 118 1 0 1 1 0 8 0 amappl9 136 603 0 600 1 0 1 1 0 8 0 amappl8 128 138 0 109 1 0 1 1 0 8 0 amappl7 120 211 0 198 1 0 1 1 0 8 0 amappl6 112 56 0 49 1 0 1 1 0 8 0 amappl5 104 145 0 131 1 0 1 1 0 8 0 amappl4 96 735 0 701 2 1 1 2 0 8 0 amappl3 88 160 0 152 1 0 1 1 0 8 0 amappl2 80 2968 0 2891 3 1 2 3 0 8 0 amappl1 72 20169 0 19714 26 16 10 21 0 8 0 amappl 80 1408 0 1356 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 38 0 4 1 0 1 1 0 8 0 uaddrrnd 24 476 0 451 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 476 0 451 1 0 1 1 0 8 0 vmmpekpl 168 8121 0 8086 3 1 2 2 0 8 0 vmmpepl 168 66084 0 63747 140 26 114 136 0 357 7 vmsppl 368 475 0 451 3 0 3 3 0 8 0 pdppl 4096 959 0 911 7 0 7 7 0 8 0 pvpl 32 220065 0 196646 229 3 226 228 0 265 32 pmappl 232 475 0 451 2 0 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 177 0 3 5 0 5 5 0 8 0