kernel: protection fault trap, code=0 Stopped at in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic the kernel did not panic ddb> trace in_delmulti(bfffffffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000ad8a00) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac7000) at in_ifdetach+0x74 sys/netinet/in.c:971 ifioctl(fffffd805e4e2190,801169ac,ffff80001e847c40,ffff80001d6bf8c8) at ifioctl+0x1463 sys/net/if.c:1866 sys_ioctl(ffff80001d6bf8c8,ffff80001e847d58,ffff80001e847da0) at sys_ioctl+0x4a1 syscall(ffff80001e847e20) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd5abd109ca0, count: -7 ddb> show registers rdi 0xffff80001f9a8000 rsi 0x5a17 __ALIGN_SIZE+0x4a17 rbp 0xffff80001e847ad0 rbx 0 rdx 0xffff80001f9a8000 rcx 0x5a16 __ALIGN_SIZE+0x4a16 rax 0xffffffff817ba21d in_delmulti+0x8d r8 0xffff800000ad8a00 r9 0xffffffff81256843 rt_ifa_purge+0x153 r10 0x5 r11 0x415b7abe014921db r12 0 r13 0x3 r14 0xbfffffffffffffff r15 0x1 rip 0xffffffff817ba21d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001e847a70 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.0) pid=101391 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=77, nice=20 forw=0xffffffffffffffff, list=0xffff80001e7a33e0,0xffffffff8280e530 process=0xffff80001d6e63e0 user=0xffff80001e842000, vmspace=0xfffffd805367fcd0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 85680 24916 58212 0 2 0 syz-executor.0 *85680 101391 58212 0 7 0x4000000 syz-executor.0 9523 469035 41878 0 2 0 syz-executor.1 9523 523932 41878 0 3 0x4000080 fsleep syz-executor.1 96398 430172 0 0 3 0x14280 nfsidl nfsio 20920 474189 0 0 3 0x14280 nfsidl nfsio 41779 258745 0 0 3 0x14280 nfsidl nfsio 7762 374130 0 0 3 0x14280 nfsidl nfsio 73931 386395 0 0 3 0x14280 nfsidl nfsio 13975 34716 0 0 3 0x14280 nfsidl nfsio 39567 198435 0 0 3 0x14280 nfsidl nfsio 49033 436034 0 0 3 0x14280 nfsidl nfsio 7510 374481 0 0 3 0x14280 nfsidl nfsio 19159 213908 0 0 3 0x14280 nfsidl nfsio 19939 283023 0 0 3 0x14280 nfsidl nfsio 49025 299657 0 0 3 0x14280 nfsidl nfsio 20184 42124 0 0 3 0x14280 nfsidl nfsio 37589 73438 0 0 3 0x14280 nfsidl nfsio 6040 380775 0 0 3 0x14280 nfsidl nfsio 45025 487868 0 0 3 0x14280 nfsidl nfsio 53233 429751 0 0 3 0x14280 nfsidl nfsio 40675 468370 0 0 3 0x14280 nfsidl nfsio 71138 523192 0 0 3 0x14280 nfsidl nfsio 68785 167468 0 0 3 0x14280 nfsidl nfsio 71866 31000 0 0 3 0x14200 bored sosplice 62588 456900 0 0 3 0x14200 acct acct 58212 212407 75828 0 3 0x82 nanosleep syz-executor.0 41878 495961 75828 0 3 0x82 nanosleep syz-executor.1 75828 468840 27003 0 3 0x82 thrsleep syz-fuzzer 75828 287555 27003 0 3 0x4000082 thrsleep syz-fuzzer 75828 284478 27003 0 3 0x4000082 thrsleep syz-fuzzer 75828 351245 27003 0 3 0x4000082 kqread syz-fuzzer 75828 184224 27003 0 3 0x4000082 thrsleep syz-fuzzer 75828 408932 27003 0 3 0x4000082 thrsleep syz-fuzzer 75828 73928 27003 0 3 0x4000082 thrsleep syz-fuzzer 27003 487616 2981 0 3 0x10008a pause ksh 2981 435073 25732 0 3 0x92 select sshd 76626 119915 1 0 3 0x100083 ttyin getty 25732 68964 1 0 3 0x80 select sshd 80284 278056 95970 73 3 0x100090 kqread syslogd 95970 342366 1 0 3 0x100082 netio syslogd 56575 394861 1 77 2 0x100090 dhclient 25405 339164 1 0 3 0x80 poll dhclient 83501 392430 0 0 3 0x14200 bored smr 2399 258867 0 0 2 0x14200 zerothread 70298 339103 0 0 3 0x14200 aiodoned aiodoned 68472 501475 0 0 3 0x14200 syncer update 21388 247791 0 0 3 0x14200 cleaner cleaner 73561 309621 0 0 3 0x14200 reaper reaper 89895 53362 0 0 3 0x14200 pgdaemon pagedaemon 1196 397700 0 0 3 0x14200 bored crynlk 1996 151492 0 0 3 0x14200 bored crypto 89932 147290 0 0 3 0x40014200 acpi0 acpi0 48702 69963 0 0 3 0x14200 bored softnet 96576 64472 0 0 2 0x14200 systqmp 41643 426371 0 0 3 0x14200 bored systq 38924 81291 0 0 3 0x40014200 bored softclock 12039 347433 0 0 3 0x40014200 idle0 1 316849 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 9486 6339K 6978K 78643K 10893 0 pcb 14 8K 8K 78643K 69 0 rtable 109 5K 7K 78643K 388 0 ifaddr 71 15K 15K 78643K 123 0 counters 21 16K 16K 78643K 22 0 ioctlops 0 0K 4K 78643K 49 0 iov 0 0K 16K 78643K 116 0 mount 1 1K 1K 78643K 1 0 vnodes 1222 77K 77K 78643K 1307 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 1K 78643K 2 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 80 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 6 17K 25K 78643K 290 0 proc 49 38K 63K 78643K 364 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 24 0 in_multi 58 3K 3K 78643K 107 0 ether_multi 1 0K 0K 78643K 8 0 mrt 0 0K 0K 78643K 10 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 197 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 127 38K 39K 78643K 1530 0 UVM aobj 7 2K 2K 78643K 7 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 22 0 temp 100 3865K 3929K 78643K 11658 0 kqueue 3 4K 12K 78643K 19 0 SYN cache 2 16K 16K 78643K 2 0 ddb> 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 rtpcb 88 33 0 31 1 0 1 1 0 8 0 rtentry 112 66 0 25 2 0 2 2 0 8 0 unpcb 120 87 0 79 1 0 1 1 0 8 0 syncache 272 7 0 7 3 3 0 1 0 8 0 tcpqe 32 243 0 243 2 2 0 1 0 8 0 tcpcb 592 97 0 87 4 2 2 2 0 8 1 ipq 40 1 0 1 1 0 1 1 0 8 1 ipqe 40 2 0 2 1 0 1 1 0 8 1 inpcb 296 491 0 483 4 2 2 2 0 8 1 rttmr 72 4 0 4 2 1 1 1 0 8 1 nd6 48 16 0 9 1 0 1 1 0 8 0 pfrktable 1344 58 0 55 4 3 1 1 0 8 0 pftag 88 9 0 8 3 2 1 1 0 8 0 pfrule 1360 8 0 6 4 3 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 253 0 68 15 2 13 14 0 8 0 art_table 32 254 0 68 2 0 2 2 0 8 0 art_node 16 65 0 24 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 1 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 78 0 68 1 0 1 1 0 8 0 shmpl 112 4 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1765 0 368 88 0 88 88 0 8 0 ffsino 240 1765 0 368 83 0 83 83 0 8 0 nchpl 144 2346 0 746 60 0 60 60 0 8 0 uvmvnodes 72 1874 0 0 35 0 35 35 0 8 0 vnodes 208 1874 0 0 99 0 99 99 0 8 0 namei 1024 6068 0 6068 1 0 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 528 2 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 18 0 16 4 3 1 1 0 8 0 scxspl 200 6851 0 6851 1 0 1 1 0 8 1 plimitpl 152 19 0 12 1 0 1 1 0 8 0 sigapl 424 498 0 447 6 0 6 6 0 8 0 futexpl 56 5394 0 5393 1 0 1 1 0 8 0 knotepl 112 78 0 58 1 0 1 1 0 8 0 kqueuepl 152 38 0 36 1 0 1 1 0 8 0 pipepl 272 93 0 82 3 2 1 2 0 8 0 fdescpl 432 462 0 447 2 0 2 2 0 8 0 filepl 120 2569 0 2469 4 0 4 4 0 8 0 lockfpl 104 175 0 174 1 0 1 1 0 8 0 lockfspl 48 71 0 70 1 0 1 1 0 8 0 sessionpl 120 17 0 7 1 0 1 1 0 8 0 pgrppl 48 36 0 26 1 0 1 1 0 8 0 ucredpl 96 252 0 244 1 0 1 1 0 8 0 zombiepl 144 447 0 447 1 0 1 1 0 8 1 processpl 944 498 0 447 7 0 7 7 0 8 0 procpl 632 806 0 747 6 0 6 6 0 8 1 sosppl 144 2 0 2 1 1 0 1 0 8 0 sockpl 400 612 0 594 3 0 3 3 0 8 1 mcl64k 65536 12 0 12 3 2 1 1 0 8 1 mcl16k 16384 3 0 3 2 2 0 1 0 8 0 mcl12k 12288 6 0 6 3 2 1 1 0 8 1 mcl9k 9216 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 13 0 13 4 3 1 1 0 8 1 mcl4k 4096 24 0 24 3 2 1 1 0 8 1 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 94893 0 94839 20 12 8 16 0 8 0 mtagpl 96 27 0 4 2 1 1 1 0 8 0 mbufpl 256 151895 0 151702 21 5 16 16 0 8 0 bufpl 280 3788 0 116 263 0 263 263 0 8 0 anonpl 16 66147 0 47246 96 2 94 94 0 107 15 amapchunkpl 152 1962 0 1780 10 2 8 10 0 158 0 amappl16 192 2584 0 1540 69 8 61 65 0 8 8 amappl15 184 3 0 1 1 0 1 1 0 8 0 amappl14 176 131 0 126 1 0 1 1 0 8 0 amappl13 168 26 0 23 1 0 1 1 0 8 0 amappl12 160 29 0 26 1 0 1 1 0 8 0 amappl11 152 305 0 292 1 0 1 1 0 8 0 amappl10 144 17 0 14 1 0 1 1 0 8 0 amappl9 136 363 0 361 1 0 1 1 0 8 0 amappl8 128 290 0 261 1 0 1 1 0 8 0 amappl7 120 101 0 91 1 0 1 1 0 8 0 amappl6 112 154 0 147 1 0 1 1 0 8 0 amappl5 104 258 0 246 1 0 1 1 0 8 0 amappl4 96 558 0 529 1 0 1 1 0 8 0 amappl3 88 256 0 245 1 0 1 1 0 8 0 amappl2 80 2875 0 2800 2 0 2 2 0 8 0 amappl1 72 18972 0 18535 23 14 9 17 0 8 0 amappl 80 1034 0 978 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 6 0 0 1 0 1 1 0 8 0 uaddrrnd 24 464 0 447 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 464 0 447 1 0 1 1 0 8 0 vmmpekpl 168 6665 0 6639 2 0 2 2 0 8 0 vmmpepl 168 63504 0 61244 131 20 111 114 0 357 12 vmsppl 272 463 0 447 3 1 2 2 0 8 0 pdppl 4096 934 0 896 6 1 5 6 0 8 0 pvpl 32 194221 0 172142 219 3 216 216 0 265 33 pmappl 200 463 0 447 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 268 0 40 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace in_delmulti(bfffffffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000ad8a00) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac7000) at in_ifdetach+0x74 sys/netinet/in.c:971 ifioctl(fffffd805e4e2190,801169ac,ffff80001e847c40,ffff80001d6bf8c8) at ifioctl+0x1463 sys/net/if.c:1866 sys_ioctl(ffff80001d6bf8c8,ffff80001e847d58,ffff80001e847da0) at sys_ioctl+0x4a1 syscall(ffff80001e847e20) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd5abd109ca0, count: -7 ddb> machine ddbcpu 1 No such command ddb> trace in_delmulti(bfffffffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000ad8a00) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac7000) at in_ifdetach+0x74 sys/netinet/in.c:971 ifioctl(fffffd805e4e2190,801169ac,ffff80001e847c40,ffff80001d6bf8c8) at ifioctl+0x1463 sys/net/if.c:1866 sys_ioctl(ffff80001d6bf8c8,ffff80001e847d58,ffff80001e847da0) at sys_ioctl+0x4a1 syscall(ffff80001e847e20) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd5abd109ca0, count: -7