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(ffff800000ae3500) 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 tun_dev_close(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff80001e7b5090) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805dc9f820,7,fffffd806c3bf900,ffff80001d6be290) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd805d7facb0,ffff80001d6be290) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd805d7facb0,ffff80001d6be290) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd805d7facb0,ffff80001d6be290) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd805d7facb0,ffff80001d6be290) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6be290) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6be290,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d6be290,ffff80001e7b5320,ffff80001e7b5370) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80001e7b53f0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffeb1b0, count: -16 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff80001e7b4e60 rbx 0 rdx 0 rcx 0x1 rax 0xffff80001d6be290 r8 0xffff800000ae3500 r9 0xffffffff81256843 rt_ifa_purge+0x153 r10 0x5 r11 0x827056d48e5d6bf r12 0 r13 0x3 r14 0xbfffffffffffffff r15 0x1 rip 0xffffffff817ba21d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001e7b4e00 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.0) pid=479957 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=68, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6bfb40,0xffff80001d6bea08 process=0xffff80001d6c0b20 user=0xffff80001e7b0000, vmspace=0xfffffd8056fb09a0 estcpu=18, cpticks=0, pctcpu=0.3 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 51148 103433 28772 0 2 0 syz-executor.1 51148 6003 28772 0 3 0x4000080 fsleep syz-executor.1 91306 459279 0 0 3 0x14200 bored sosplice 13722 454986 0 0 3 0x14200 acct acct 28772 348138 27468 0 3 0x82 nanosleep syz-executor.1 27468 119780 30381 0 3 0x82 thrsleep syz-fuzzer 27468 457290 30381 0 3 0x4000082 nanosleep syz-fuzzer 27468 438989 30381 0 3 0x4000082 thrsleep syz-fuzzer 27468 486513 30381 0 3 0x4000082 thrsleep syz-fuzzer 27468 407550 30381 0 3 0x4000082 thrsleep syz-fuzzer 27468 509176 30381 0 3 0x4000082 thrsleep syz-fuzzer 27468 263233 30381 0 2 0x4000002 syz-fuzzer 30381 288428 74366 0 3 0x10008a pause ksh 74366 237798 58004 0 3 0x92 select sshd 526 335788 1 0 3 0x100083 ttyin getty 58004 179570 1 0 3 0x80 select sshd 41435 38412 80142 73 3 0x100090 kqread syslogd 80142 103554 1 0 3 0x100082 netio syslogd 86948 143809 1 77 2 0x100090 dhclient 35834 273771 1 0 3 0x80 poll dhclient 15801 104986 0 0 3 0x14200 bored smr 72572 392416 0 0 2 0x14200 zerothread 12466 395620 0 0 3 0x14200 aiodoned aiodoned 94513 524195 0 0 3 0x14200 syncer update 33651 112175 0 0 3 0x14200 cleaner cleaner 84915 158702 0 0 3 0x14200 reaper reaper 31732 420298 0 0 3 0x14200 pgdaemon pagedaemon 33277 158419 0 0 3 0x14200 bored crynlk 50348 277467 0 0 3 0x14200 bored crypto 80004 443048 0 0 3 0x40014200 acpi0 acpi0 33723 56856 0 0 3 0x14200 bored softnet 29752 311574 0 0 2 0x14200 systqmp 20089 237176 0 0 3 0x14200 bored systq 60594 159320 0 0 3 0x40014200 bored softclock 24580 8767 0 0 3 0x40014200 idle0 1 289996 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 9494 6356K 6875K 78643K 11098 0 pcb 13 8K 8K 78643K 63 0 rtable 88 4K 8K 78643K 601 0 ifaddr 80 16K 17K 78643K 208 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 29 0 ioctlops 0 0K 4K 78643K 89 0 iov 0 0K 24K 78643K 65 0 mount 1 1K 1K 78643K 1 0 vnodes 1224 77K 77K 78643K 1386 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 11 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 176 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 478 0 sigio 0 0K 0K 78643K 10 0 proc 49 38K 54K 78643K 420 0 subproc 23 1K 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 30 0 in_multi 70 3K 3K 78643K 159 0 ether_multi 1 0K 0K 78643K 10 0 mrt 0 0K 0K 78643K 6 0 ISOFS mount 1 32K 32K 78643K 1 0 MSDOSFS mount 1 16K 16K 78643K 1 0 ttys 61 281K 281K 78643K 61 0 exec 0 0K 1K 78643K 211 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 157 58K 74K 78643K 1961 0 UVM aobj 26 2K 3K 78643K 35 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 42 0 NDP 12 0K 0K 78643K 36 0 temp 117 3861K 3928K 78643K 3801 0 kqueue 3 4K 8K 78643K 16 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 12 0 4 1 0 1 1 0 8 0 rtpcb 88 47 0 45 1 0 1 1 0 8 0 rtentry 112 95 0 65 2 0 2 2 0 8 0 unpcb 120 211 0 203 1 0 1 1 0 8 0 syncache 272 12 0 12 3 2 1 1 0 8 1 tcpqe 32 74 0 74 1 1 0 1 0 8 0 tcpcb 592 146 0 142 4 1 3 3 0 8 2 inpcb 296 1070 0 1063 2 0 2 2 0 8 1 rttmr 72 3 0 3 2 1 1 1 0 8 1 nd6 48 23 0 20 1 0 1 1 0 8 0 ppxss 1136 4 0 4 3 2 1 1 0 8 1 pfstscr 40 2 0 2 1 0 1 1 0 8 1 pfrktable 1344 107 0 103 2 1 1 1 0 8 0 pftag 88 18 0 18 2 1 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 6 0 4 1 0 1 1 0 8 0 pfstate 328 3 0 2 1 0 1 1 0 8 0 pfrule 1360 22 0 18 2 1 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 412 0 267 14 1 13 14 0 8 0 art_table 32 413 0 267 2 0 2 2 0 8 0 art_node 16 93 0 63 1 0 1 1 0 8 0 sysvmsgpl 40 9 0 2 2 1 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 172 0 162 1 0 1 1 0 8 0 shmpl 112 32 0 9 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2015 0 622 88 0 88 88 0 8 0 ffsino 240 2015 0 622 83 0 83 83 0 8 0 nchpl 144 2907 0 1336 60 0 60 60 0 8 0 uvmvnodes 72 2181 0 0 40 0 40 40 0 8 0 vnodes 208 2181 0 0 115 0 115 115 0 8 0 namei 1024 7627 0 7627 1 0 1 1 0 8 1 vcpupl 1984 3 0 0 1 0 1 1 0 8 0 vmpool 528 3 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 34 0 30 2 1 1 1 0 8 0 scxspl 200 8670 0 8670 1 0 1 1 0 8 1 plimitpl 152 49 0 42 1 0 1 1 0 8 0 sigapl 424 666 0 636 4 0 4 4 0 8 0 futexpl 56 9763 0 9762 1 0 1 1 0 8 0 knotepl 112 78 0 64 1 0 1 1 0 8 0 kqueuepl 152 48 0 46 1 0 1 1 0 8 0 pipepl 272 121 0 113 2 1 1 2 0 8 0 fdescpl 432 650 0 636 2 0 2 2 0 8 0 filepl 120 3878 0 3792 4 0 4 4 0 8 1 lockfpl 104 114 0 113 1 0 1 1 0 8 0 lockfspl 48 45 0 44 1 0 1 1 0 8 0 sessionpl 120 17 0 7 1 0 1 1 0 8 0 pgrppl 48 23 0 13 1 0 1 1 0 8 0 ucredpl 96 275 0 268 1 0 1 1 0 8 0 zombiepl 144 637 0 636 1 0 1 1 0 8 0 processpl 944 666 0 636 4 0 4 4 0 8 0 procpl 632 1209 0 1172 4 0 4 4 0 8 0 sosppl 144 9 0 9 2 2 0 1 0 8 0 sockpl 400 1330 0 1313 5 1 4 4 0 8 2 mcl64k 65536 28 0 28 1 0 1 1 0 8 1 mcl16k 16384 3 0 3 2 2 0 1 0 8 0 mcl12k 12288 11 0 11 3 2 1 1 0 8 1 mcl9k 9216 11 0 11 1 0 1 1 0 8 1 mcl8k 8192 19 0 19 1 0 1 1 0 8 1 mcl4k 4096 34 0 34 2 1 1 1 0 8 1 mcl2k2 2112 2 0 2 1 0 1 1 0 8 1 mcl2k 2048 95949 0 95907 17 10 7 13 0 8 0 mtagpl 96 44 0 21 2 1 1 1 0 8 0 mbufpl 256 154612 0 154437 30 3 27 27 0 8 3 bufpl 280 4131 0 119 287 0 287 287 0 8 0 anonpl 16 78635 0 58421 100 3 97 97 0 107 15 amapchunkpl 152 3153 0 2934 23 0 23 23 0 158 13 amappl16 192 3156 0 2106 66 5 61 65 0 8 8 amappl15 184 446 0 442 1 0 1 1 0 8 0 amappl14 176 4 0 1 1 0 1 1 0 8 0 amappl13 168 26 0 23 1 0 1 1 0 8 0 amappl12 160 20 0 16 1 0 1 1 0 8 0 amappl11 152 47 0 37 1 0 1 1 0 8 0 amappl10 144 232 0 229 1 0 1 1 0 8 0 amappl9 136 293 0 291 1 0 1 1 0 8 0 amappl8 128 356 0 306 2 0 2 2 0 8 0 amappl7 120 102 0 91 1 0 1 1 0 8 0 amappl6 112 32 0 25 1 0 1 1 0 8 0 amappl5 104 716 0 702 1 0 1 1 0 8 0 amappl4 96 432 0 404 1 0 1 1 0 8 0 amappl3 88 143 0 135 1 0 1 1 0 8 0 amappl2 80 4839 0 4767 2 0 2 2 0 8 0 amappl1 72 23135 0 22702 23 13 10 17 0 8 0 amappl 80 1455 0 1396 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 34 0 9 1 0 1 1 0 8 0 uaddrrnd 24 653 0 636 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 653 0 636 1 0 1 1 0 8 0 vmmpekpl 168 7789 0 7766 2 0 2 2 0 8 0 vmmpepl 168 85398 0 83173 156 32 124 151 0 357 27 vmsppl 272 652 0 636 3 1 2 2 0 8 0 pdppl 4096 1312 0 1275 6 1 5 6 0 8 0 pvpl 32 230011 0 206664 229 5 224 224 0 265 35 pmappl 200 652 0 636 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 266 0 26 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(ffff800000ae3500) 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 tun_dev_close(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff80001e7b5090) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805dc9f820,7,fffffd806c3bf900,ffff80001d6be290) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd805d7facb0,ffff80001d6be290) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd805d7facb0,ffff80001d6be290) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd805d7facb0,ffff80001d6be290) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd805d7facb0,ffff80001d6be290) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6be290) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6be290,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d6be290,ffff80001e7b5320,ffff80001e7b5370) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80001e7b53f0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffeb1b0, count: -16 ddb> machine ddbcpu 1 No such command ddb> trace in_delmulti(bfffffffffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000ae3500) 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 tun_dev_close(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff80001e7b5090) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805dc9f820,7,fffffd806c3bf900,ffff80001d6be290) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd805d7facb0,ffff80001d6be290) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd805d7facb0,ffff80001d6be290) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd805d7facb0,ffff80001d6be290) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd805d7facb0,ffff80001d6be290) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6be290) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6be290,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d6be290,ffff80001e7b5320,ffff80001e7b5370) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80001e7b53f0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffeb1b0, count: -16