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(fff9fffffff7feff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000af4500) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac7000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac7000) at if_detach+0x140 sys/net/if.c:1032 tun_clone_destroy(ffff800000ac7000) at tun_clone_destroy+0x1c7 sys/net/if_tun.c:326 ifioctl(fffffd806b63aaf0,80206979,ffff80001d797790,ffff80001d6bf3d8) at ifioctl+0x3de sys/net/if.c:1821 sys_ioctl(ffff80001d6bf3d8,ffff80001d7978a8,ffff80001d7978f0) at sys_ioctl+0x4a1 syscall(ffff80001d797970) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x519dae75fc0, count: -9 ddb> show registers rdi 0xffff80001f9a6000 rsi 0x11a66 __ALIGN_SIZE+0x10a66 rbp 0xffff80001d797570 rbx 0 rdx 0xffff80001f9a6000 rcx 0x11a65 __ALIGN_SIZE+0x10a65 rax 0xffffffff817ba21d in_delmulti+0x8d r8 0xffff800000af4500 r9 0xffffffff81256843 rt_ifa_purge+0x153 r10 0x5 r11 0x43e37db4c70b7082 r12 0 r13 0 r14 0xfff9fffffff7feff r15 0x1 rip 0xffffffff817ba21d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d797510 ss 0 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.0) pid=243676 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff9b30,0xffffffff8280e530 process=0xffff80001e82f2a0 user=0xffff80001d792000, vmspace=0xfffffd806bc0acc0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 5760 518972 84980 0 2 0 syz-executor.0 * 5760 243676 84980 0 7 0x4000000 syz-executor.0 88806 87898 0 0 3 0x14200 bored sosplice 78511 479598 0 0 3 0x14200 acct acct 15329 262734 0 0 3 0x14280 nfsidl nfsio 25458 45446 0 0 3 0x14280 nfsidl nfsio 31484 181506 0 0 3 0x14280 nfsidl nfsio 18186 162900 0 0 3 0x14280 nfsidl nfsio 65176 121210 0 0 3 0x14280 nfsidl nfsio 10766 97968 0 0 3 0x14280 nfsidl nfsio 20631 476294 0 0 3 0x14280 nfsidl nfsio 35026 36876 0 0 3 0x14280 nfsidl nfsio 96007 361384 0 0 3 0x14280 nfsidl nfsio 93898 221802 0 0 3 0x14280 nfsidl nfsio 15980 395435 0 0 3 0x14280 nfsidl nfsio 52128 320218 0 0 3 0x14280 nfsidl nfsio 71828 365386 0 0 3 0x14280 nfsidl nfsio 16249 214898 0 0 3 0x14280 nfsidl nfsio 36650 343973 0 0 3 0x14280 nfsidl nfsio 29793 38470 0 0 3 0x14280 nfsidl nfsio 43930 360958 0 0 3 0x14280 nfsidl nfsio 89787 150713 0 0 3 0x14280 nfsidl nfsio 76519 323630 0 0 3 0x14280 nfsidl nfsio 92029 520283 0 0 3 0x14280 nfsidl nfsio 84980 87715 24637 0 3 0x82 nanosleep syz-executor.0 87726 305952 24637 0 2 0x2 syz-executor.1 24637 345292 53341 0 3 0x82 thrsleep syz-fuzzer 24637 305424 53341 0 3 0x4000082 thrsleep syz-fuzzer 24637 250571 53341 0 3 0x4000082 thrsleep syz-fuzzer 24637 445730 53341 0 3 0x4000082 thrsleep syz-fuzzer 24637 467728 53341 0 3 0x4000082 thrsleep syz-fuzzer 24637 88376 53341 0 3 0x4000082 kqread syz-fuzzer 24637 309666 53341 0 3 0x4000082 thrsleep syz-fuzzer 53341 246607 95721 0 3 0x10008a pause ksh 95721 229168 98544 0 3 0x92 select sshd 84633 184778 1 0 3 0x100083 ttyin getty 98544 414678 1 0 3 0x80 select sshd 94879 208436 23709 73 3 0x100090 kqread syslogd 23709 327458 1 0 3 0x100082 netio syslogd 46791 420420 1 77 2 0x100090 dhclient 34682 80757 1 0 3 0x80 poll dhclient 50586 224367 0 0 3 0x14200 bored smr 86250 480445 0 0 2 0x14200 zerothread 1616 38527 0 0 3 0x14200 aiodoned aiodoned 84059 111507 0 0 3 0x14200 syncer update 62747 168399 0 0 3 0x14200 cleaner cleaner 77934 183387 0 0 3 0x14200 reaper reaper 55613 42132 0 0 3 0x14200 pgdaemon pagedaemon 94609 287461 0 0 3 0x14200 bored crynlk 48302 359328 0 0 3 0x14200 bored crypto 45628 396957 0 0 3 0x40014200 acpi0 acpi0 19708 372830 0 0 3 0x14200 bored softnet 48874 163806 0 0 2 0x14200 systqmp 18612 250638 0 0 3 0x14200 bored systq 72971 23962 0 0 3 0x40014200 bored softclock 7618 356235 0 0 3 0x40014200 idle0 1 407235 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 9487 6353K 6710K 78643K 10995 0 pcb 13 8K 8K 78643K 75 0 rtable 109 6K 10K 78643K 417 0 ifaddr 69 14K 16K 78643K 151 0 counters 21 16K 16K 78643K 24 0 ioctlops 0 0K 4K 78643K 73 0 iov 0 0K 12K 78643K 26 0 mount 1 1K 1K 78643K 1 0 vnodes 1223 77K 77K 78643K 1347 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 6 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 104 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 343 0 sigio 0 0K 0K 78643K 4 0 proc 50 38K 63K 78643K 372 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 18 0 in_multi 45 2K 2K 78643K 97 0 ether_multi 1 0K 0K 78643K 6 0 mrt 0 0K 0K 78643K 2 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 55 254K 254K 78643K 55 0 exec 0 0K 1K 78643K 205 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 128 22K 47K 78643K 1601 0 UVM aobj 21 2K 2K 78643K 23 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 49 0 NDP 10 0K 0K 78643K 26 0 temp 94 3860K 3924K 78643K 2971 0 kqueue 3 4K 8K 78643K 11 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 31 0 29 1 0 1 1 0 8 0 rtentry 112 66 0 27 2 0 2 2 0 8 0 unpcb 120 582 0 573 1 0 1 1 0 8 0 syncache 272 7 0 7 3 3 0 1 0 8 0 tcpqe 32 56 0 56 1 1 0 1 0 8 0 tcpcb 592 105 0 93 2 1 1 2 0 8 0 inpcb 296 754 0 744 3 1 2 2 0 8 1 nd6 48 18 0 13 1 0 1 1 0 8 0 pfstscr 40 2 0 2 1 1 0 1 0 8 0 pfrktable 1344 67 0 62 3 1 2 2 0 8 1 pftag 88 14 0 12 1 0 1 1 0 8 0 pfstkey 112 3 0 3 2 2 0 1 0 8 0 pfstate 328 2 0 2 2 2 0 1 0 8 0 pfrule 1360 19 0 14 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 286 0 108 15 2 13 15 0 8 0 art_table 32 287 0 108 2 0 2 2 0 8 0 art_node 16 65 0 25 1 0 1 1 0 8 0 sysvmsgpl 40 10 0 2 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 98 0 88 1 0 1 1 0 8 0 shmpl 112 20 0 2 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1847 0 450 88 0 88 88 0 8 0 ffsino 240 1847 0 450 83 0 83 83 0 8 0 nchpl 144 2512 0 920 60 0 60 60 0 8 0 uvmvnodes 72 1979 0 0 36 0 36 36 0 8 0 vnodes 208 1979 0 0 105 0 105 105 0 8 0 namei 1024 6556 0 6556 2 1 1 1 0 8 1 vmpool 528 2 0 2 1 1 0 1 0 8 0 pfiaddrpl 120 18 0 16 1 0 1 1 0 8 0 scxspl 200 7019 0 7019 2 1 1 1 0 8 1 plimitpl 152 46 0 39 1 0 1 1 0 8 0 sigapl 424 551 0 501 6 0 6 6 0 8 0 futexpl 56 7521 0 7521 2 1 1 1 0 8 1 knotepl 112 69 0 49 1 0 1 1 0 8 0 kqueuepl 152 26 0 23 1 0 1 1 0 8 0 pipepl 272 111 0 100 1 0 1 1 0 8 0 fdescpl 432 515 0 501 2 0 2 2 0 8 0 filepl 120 3531 0 3430 4 0 4 4 0 8 0 lockfpl 104 61 0 60 1 0 1 1 0 8 0 lockfspl 48 29 0 28 1 0 1 1 0 8 0 sessionpl 120 17 0 7 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 283 0 276 1 0 1 1 0 8 0 zombiepl 144 501 0 501 1 0 1 1 0 8 1 processpl 944 551 0 501 7 0 7 7 0 8 0 procpl 632 912 0 855 7 1 6 6 0 8 1 sosppl 144 2 0 2 1 1 0 1 0 8 0 sockpl 400 1371 0 1350 6 2 4 4 0 8 1 mcl64k 65536 17 0 17 2 1 1 1 0 8 1 mcl16k 16384 5 0 5 3 2 1 1 0 8 1 mcl12k 12288 8 0 8 1 1 0 1 0 8 0 mcl9k 9216 2 0 2 2 1 1 1 0 8 1 mcl8k 8192 16 0 16 2 1 1 1 0 8 1 mcl4k 4096 37 0 37 3 2 1 1 0 8 1 mcl2k 2048 94105 0 94062 16 9 7 13 0 8 0 mtagpl 96 41 0 28 2 1 1 1 0 8 0 mbufpl 256 151460 0 151320 24 6 18 20 0 8 2 bufpl 280 3600 0 116 249 0 249 249 0 8 0 anonpl 16 63909 0 46295 90 2 88 88 0 107 16 amapchunkpl 152 2718 0 2531 27 14 13 22 0 158 5 amappl16 192 2553 0 1627 59 4 55 59 0 8 8 amappl15 184 152 0 150 1 0 1 1 0 8 0 amappl14 176 162 0 159 1 0 1 1 0 8 0 amappl13 168 26 0 23 1 0 1 1 0 8 0 amappl12 160 25 0 22 1 0 1 1 0 8 0 amappl11 152 49 0 40 1 0 1 1 0 8 0 amappl10 144 17 0 13 1 0 1 1 0 8 0 amappl9 136 366 0 363 1 0 1 1 0 8 0 amappl8 128 302 0 269 2 0 2 2 0 8 0 amappl7 120 102 0 91 1 0 1 1 0 8 0 amappl6 112 21 0 18 1 0 1 1 0 8 0 amappl5 104 448 0 436 1 0 1 1 0 8 0 amappl4 96 431 0 404 1 0 1 1 0 8 0 amappl3 88 288 0 278 1 0 1 1 0 8 0 amappl2 80 3466 0 3402 2 0 2 2 0 8 0 amappl1 72 20258 0 19845 23 14 9 17 0 8 0 amappl 80 1130 0 1077 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 22 0 2 1 0 1 1 0 8 0 uaddrrnd 24 517 0 503 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 517 0 503 1 0 1 1 0 8 0 vmmpekpl 168 6843 0 6814 2 0 2 2 0 8 0 vmmpepl 168 69655 0 67629 117 17 100 112 0 357 11 vmsppl 272 516 0 503 2 1 1 2 0 8 0 pdppl 4096 1040 0 1006 6 1 5 6 0 8 0 pvpl 32 197129 0 176430 205 0 205 205 0 265 36 pmappl 200 516 0 503 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 263 0 33 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace in_delmulti(fff9fffffff7feff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000af4500) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac7000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac7000) at if_detach+0x140 sys/net/if.c:1032 tun_clone_destroy(ffff800000ac7000) at tun_clone_destroy+0x1c7 sys/net/if_tun.c:326 ifioctl(fffffd806b63aaf0,80206979,ffff80001d797790,ffff80001d6bf3d8) at ifioctl+0x3de sys/net/if.c:1821 sys_ioctl(ffff80001d6bf3d8,ffff80001d7978a8,ffff80001d7978f0) at sys_ioctl+0x4a1 syscall(ffff80001d797970) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x519dae75fc0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace in_delmulti(fff9fffffff7feff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000af4500) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac7000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac7000) at if_detach+0x140 sys/net/if.c:1032 tun_clone_destroy(ffff800000ac7000) at tun_clone_destroy+0x1c7 sys/net/if_tun.c:326 ifioctl(fffffd806b63aaf0,80206979,ffff80001d797790,ffff80001d6bf3d8) at ifioctl+0x3de sys/net/if.c:1821 sys_ioctl(ffff80001d6bf3d8,ffff80001d7978a8,ffff80001d7978f0) at sys_ioctl+0x4a1 syscall(ffff80001d797970) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x519dae75fc0, count: -9