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(fffdffbffbffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000ad6600) 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(5d01,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff80001f9a7750) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805dc54820,7,fffffd806c3bfa80,ffff80001d6be780) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80601f2ca8,ffff80001d6be780) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80601f2ca8,ffff80001d6be780) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80601f2ca8,ffff80001d6be780) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80601f2ca8,ffff80001d6be780) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6be780) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6be780,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d6be780,ffff80001f9a79e0,ffff80001f9a7a30) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80001f9a7ab0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd4800, count: -16 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff80001f9a7520 rbx 0 rdx 0 rcx 0x1 rax 0xffff80001d6be780 r8 0xffff800000ad6600 r9 0xffffffff81256843 rt_ifa_purge+0x153 r10 0x5 r11 0x21506934912dda77 r12 0 r13 0x3 r14 0xfffdffbffbffffff r15 0x1 rip 0xffffffff817ba21d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001f9a74c0 ss 0 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.1) pid=377248 stat=onproc flags process=1008 proc=2000 pri=32, usrpri=73, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff8008,0xffffffff8280e530 process=0xffff80001d6c19e0 user=0xffff80001f9a2000, vmspace=0xfffffd806bc0add0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 83445 324159 68961 0 3 0x82 nanosleep syz-executor.0 68961 59325 42075 0 3 0x82 thrsleep syz-fuzzer 68961 218374 42075 0 3 0x4000082 nanosleep syz-fuzzer 68961 22349 42075 0 2 0x4000002 syz-fuzzer 68961 85902 42075 0 3 0x4000082 thrsleep syz-fuzzer 68961 22771 42075 0 3 0x4000082 thrsleep syz-fuzzer 68961 206015 42075 0 3 0x4000082 thrsleep syz-fuzzer 68961 464329 42075 0 3 0x4000082 thrsleep syz-fuzzer 42075 201991 27206 0 3 0x10008a pause ksh 27206 335941 82045 0 3 0x92 select sshd 93244 261308 1 0 3 0x100083 ttyin getty 82045 219989 1 0 3 0x80 select sshd 3287 502703 76311 73 3 0x100090 kqread syslogd 76311 424341 1 0 3 0x100082 netio syslogd 66898 198908 1 77 2 0x100090 dhclient 27781 450271 1 0 3 0x80 poll dhclient 99374 132873 0 0 3 0x14200 bored smr 82548 17454 0 0 2 0x14200 zerothread 26074 451915 0 0 3 0x14200 aiodoned aiodoned 33296 5843 0 0 3 0x14200 syncer update 58531 131584 0 0 3 0x14200 cleaner cleaner 52330 165612 0 0 3 0x14200 reaper reaper 35901 183119 0 0 3 0x14200 pgdaemon pagedaemon 26925 196008 0 0 3 0x14200 bored crynlk 20940 356756 0 0 3 0x14200 bored crypto 49155 446776 0 0 3 0x40014200 acpi0 acpi0 88410 73135 0 0 3 0x14200 bored softnet 85696 192814 0 0 2 0x14200 systqmp 1711 217881 0 0 3 0x14200 bored systq 56725 352877 0 0 3 0x40014200 bored softclock 77766 93398 0 0 3 0x40014200 idle0 1 485057 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 9448 6323K 6776K 78643K 10786 0 pcb 13 8K 8K 78643K 65 0 rtable 106 3K 4K 78643K 246 0 ifaddr 42 10K 11K 78643K 67 0 counters 21 16K 16K 78643K 24 0 ioctlops 0 0K 4K 78643K 37 0 iov 0 0K 16K 78643K 8 0 mount 1 1K 1K 78643K 1 0 vnodes 1221 77K 77K 78643K 1284 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 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 20 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 4 9K 25K 78643K 114 0 sigio 0 0K 0K 78643K 2 0 proc 48 38K 54K 78643K 364 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 10 0 in_multi 43 2K 2K 78643K 78 0 ether_multi 1 0K 0K 78643K 2 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 49 228K 228K 78643K 49 0 exec 0 0K 1K 78643K 183 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 117 22K 31K 78643K 1104 0 UVM aobj 5 2K 2K 78643K 8 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 12 0 NDP 6 0K 0K 78643K 16 0 temp 61 3851K 3915K 78643K 2036 0 kqueue 3 4K 8K 78643K 5 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 21 0 19 1 0 1 1 0 8 0 rtentry 112 56 0 13 2 0 2 2 0 8 0 unpcb 120 65 0 57 1 0 1 1 0 8 0 syncache 272 4 0 4 1 1 0 1 0 8 0 tcpqe 32 591 0 591 1 0 1 1 0 8 1 tcpcb 592 26 0 22 2 0 2 2 0 8 1 inpcb 296 212 0 205 2 0 2 2 0 8 1 nd6 48 15 0 7 1 0 1 1 0 8 0 ppxss 1136 1 0 1 1 0 1 1 0 8 1 pfrktable 1344 6 0 6 1 0 1 1 0 8 1 pftag 88 1 0 0 1 0 1 1 0 8 0 pfqueue 264 2 0 0 1 0 1 1 0 8 0 pfrule 1360 4 0 2 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 213 0 0 14 0 14 14 0 8 0 art_table 32 214 0 0 2 0 2 2 0 8 0 art_node 16 55 0 13 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 14 0 4 1 0 1 1 0 8 0 shmpl 112 5 0 3 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1521 0 130 88 0 88 88 0 8 0 ffsino 240 1521 0 130 83 0 83 83 0 8 0 nchpl 144 1860 0 280 60 0 60 60 0 8 0 uvmvnodes 72 1617 0 0 30 0 30 30 0 8 0 vnodes 208 1617 0 0 86 0 86 86 0 8 0 namei 1024 4748 0 4748 1 0 1 1 0 8 1 pfiaddrpl 120 2 0 2 1 0 1 1 0 8 1 scxspl 200 5312 0 5312 1 0 1 1 0 8 1 plimitpl 152 20 0 13 1 0 1 1 0 8 0 sigapl 424 300 0 273 4 0 4 4 0 8 0 futexpl 56 1825 0 1825 1 0 1 1 0 8 1 knotepl 112 64 0 50 1 0 1 1 0 8 0 kqueuepl 152 14 0 12 1 0 1 1 0 8 0 pipepl 272 79 0 71 1 0 1 1 0 8 0 fdescpl 432 286 0 273 2 0 2 2 0 8 0 filepl 120 1575 0 1493 4 0 4 4 0 8 1 lockfpl 104 30 0 29 1 0 1 1 0 8 0 lockfspl 48 12 0 11 1 0 1 1 0 8 0 sessionpl 120 17 0 7 1 0 1 1 0 8 0 pgrppl 48 17 0 7 1 0 1 1 0 8 0 ucredpl 96 138 0 131 1 0 1 1 0 8 0 zombiepl 144 274 0 272 2 1 1 1 0 8 0 processpl 944 300 0 272 4 0 4 4 0 8 0 procpl 632 395 0 361 4 0 4 4 0 8 0 sockpl 400 298 0 281 4 0 4 4 0 8 2 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl12k 12288 2 0 2 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 2 0 2 1 0 1 1 0 8 1 mcl4k 4096 17 0 17 2 1 1 1 0 8 1 mcl2k 2048 93618 0 93555 25 8 17 20 0 8 8 mtagpl 96 8 0 4 2 1 1 1 0 8 0 mbufpl 256 148695 0 148562 16 3 13 13 0 8 2 bufpl 280 3376 0 120 233 0 233 233 0 8 0 anonpl 16 46917 0 28767 82 1 81 81 0 107 8 amapchunkpl 152 1506 0 1309 13 0 13 13 0 158 5 amappl16 192 1392 0 451 48 0 48 48 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 42 0 40 1 0 1 1 0 8 0 amappl13 168 26 0 23 1 0 1 1 0 8 0 amappl12 160 31 0 26 1 0 1 1 0 8 0 amappl11 152 88 0 78 1 0 1 1 0 8 0 amappl10 144 12 0 10 1 0 1 1 0 8 0 amappl9 136 359 0 358 1 0 1 1 0 8 0 amappl8 128 292 0 260 2 0 2 2 0 8 0 amappl7 120 109 0 98 1 0 1 1 0 8 0 amappl6 112 26 0 21 1 0 1 1 0 8 0 amappl5 104 168 0 157 1 0 1 1 0 8 0 amappl4 96 463 0 434 1 0 1 1 0 8 0 amappl3 88 165 0 156 1 0 1 1 0 8 0 amappl2 80 1429 0 1366 2 0 2 2 0 8 0 amappl1 72 15373 0 14965 22 9 13 17 0 8 4 amappl 80 647 0 594 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 7 0 3 1 0 1 1 0 8 0 uaddrrnd 24 286 0 273 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 286 0 273 1 0 1 1 0 8 0 vmmpekpl 168 5932 0 5907 2 0 2 2 0 8 0 vmmpepl 168 42488 0 40527 120 2 118 118 0 357 29 vmsppl 272 285 0 273 2 0 2 2 0 8 1 pdppl 4096 578 0 546 6 0 6 6 0 8 1 pvpl 32 149462 0 128443 190 0 190 190 0 265 18 pmappl 200 285 0 273 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 252 0 15 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace in_delmulti(fffdffbffbffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000ad6600) 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(5d01,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff80001f9a7750) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805dc54820,7,fffffd806c3bfa80,ffff80001d6be780) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80601f2ca8,ffff80001d6be780) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80601f2ca8,ffff80001d6be780) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80601f2ca8,ffff80001d6be780) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80601f2ca8,ffff80001d6be780) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6be780) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6be780,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d6be780,ffff80001f9a79e0,ffff80001f9a7a30) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80001f9a7ab0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd4800, count: -16 ddb> machine ddbcpu 1 No such command ddb> trace in_delmulti(fffdffbffbffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000ad6600) 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(5d01,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff80001f9a7750) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805dc54820,7,fffffd806c3bfa80,ffff80001d6be780) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80601f2ca8,ffff80001d6be780) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80601f2ca8,ffff80001d6be780) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80601f2ca8,ffff80001d6be780) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80601f2ca8,ffff80001d6be780) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6be780) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6be780,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d6be780,ffff80001f9a79e0,ffff80001f9a7a30) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80001f9a7ab0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd4800, count: -16