uvm_fault(0xfffffd806bc09cc0, 0xe7, 0, 1) -> e kernel: page 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 kernel page fault uvm_fault(0xfffffd806bc09cc0, 0xe7, 0, 1) -> e in_delmulti(db) at in_delmulti+0x8d sys/netinet/in.c:914 end trace frame: 0xffff80001d79f330, count: 0 ddb> trace in_delmulti(db) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000ae8300) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac6000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac6000) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac6000) 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(ffff80001d79f510) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd8066ebe8f0,7,fffffd806c3bf900,ffff80001d6aa5f8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd8057412b50,ffff80001d6aa5f8) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8057412b50,ffff80001d6aa5f8) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd8057412b50,ffff80001d6aa5f8) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd8057412b50,ffff80001d6aa5f8) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6aa5f8) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6aa5f8,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff80001d6aa5f8,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff80001d6aa5f8,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff80001d6aa5f8) at userret+0x159 sys/kern/kern_sig.c:1872 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x7f7ffffca2d0, count: -16 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff80001d79f2e0 rbx 0 rdx 0x3 rcx 0x1 rax 0 r8 0xffffffff818ebc13 rt_ifa_purge+0x153 r9 0x5 r10 0xa328e2b689e4fc1e r11 0x4554ea69124f7f5d r12 0 r13 0x8da1216f __kernel_virt_to_phys+0xda1216f r14 0xdb r15 0x1 rip 0xffffffff81e46f2d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d79f280 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.1) pid=148869 stat=onproc flags process=a proc=2000 pri=32, usrpri=81, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6aa388,0xffff80001d6c2ec8 process=0xffff80001d6c55d0 user=0xffff80001d79a000, vmspace=0xfffffd806bc09cc0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 21340 126431 2007 0 2 0 syz-executor.0 21340 514971 2007 0 2 0x4000000 syz-executor.0 21340 14283 2007 0 3 0x4000080 fsleep syz-executor.0 2033 197702 1 0 3 0x100083 ttyin getty 2007 132864 10674 0 3 0x82 nanosleep syz-executor.0 49726 273809 0 0 3 0x14280 nfsidl nfsio 21403 38876 0 0 3 0x14280 nfsidl nfsio 39046 266005 0 0 3 0x14280 nfsidl nfsio 13855 240002 0 0 3 0x14280 nfsidl nfsio 61810 300112 0 0 3 0x14280 nfsidl nfsio 84320 75989 0 0 3 0x14280 nfsidl nfsio 13992 246120 0 0 3 0x14280 nfsidl nfsio 693 461591 0 0 3 0x14280 nfsidl nfsio 10386 517897 0 0 3 0x14280 nfsidl nfsio 33896 117915 0 0 3 0x14280 nfsidl nfsio 40916 76342 0 0 3 0x14280 nfsidl nfsio 9939 434237 0 0 3 0x14280 nfsidl nfsio 97366 367099 0 0 3 0x14280 nfsidl nfsio 99537 169668 0 0 3 0x14280 nfsidl nfsio 25475 18831 0 0 3 0x14280 nfsidl nfsio 86629 487307 0 0 3 0x14280 nfsidl nfsio 16677 98379 0 0 3 0x14280 nfsidl nfsio 69675 177689 0 0 3 0x14280 nfsidl nfsio 11612 430514 0 0 3 0x14280 nfsidl nfsio 18799 470956 0 0 3 0x14280 nfsidl nfsio 22469 54400 0 0 3 0x14200 bored sosplice 10674 321989 52029 0 3 0x82 thrsleep syz-fuzzer 10674 336722 52029 0 3 0x4000082 thrsleep syz-fuzzer 10674 56599 52029 0 3 0x4000082 thrsleep syz-fuzzer 10674 21998 52029 0 3 0x4000082 thrsleep syz-fuzzer 10674 175802 52029 0 3 0x4000082 thrsleep syz-fuzzer 10674 138261 52029 0 3 0x4000082 thrsleep syz-fuzzer 10674 359686 52029 0 3 0x4000082 thrsleep syz-fuzzer 10674 313210 52029 0 3 0x4000082 kqread syz-fuzzer 52029 429784 30899 0 3 0x10008a pause ksh 30899 92497 83502 0 3 0x92 select sshd 83502 451023 1 0 3 0x80 select sshd 11157 88958 39089 73 3 0x100090 kqread syslogd 39089 45849 1 0 3 0x100082 netio syslogd 4805 326753 1 77 2 0x100090 dhclient 14751 451997 1 0 3 0x80 poll dhclient 21732 240813 0 0 3 0x14200 bored smr 59938 417776 0 0 2 0x14200 zerothread 700 513856 0 0 3 0x14200 aiodoned aiodoned 45137 404401 0 0 3 0x14200 syncer update 45731 187091 0 0 3 0x14200 cleaner cleaner 24989 100789 0 0 3 0x14200 reaper reaper 86067 66929 0 0 3 0x14200 pgdaemon pagedaemon 37084 362336 0 0 3 0x14200 bored crynlk 40506 251984 0 0 3 0x14200 bored crypto 9622 159472 0 0 3 0x40014200 acpi0 acpi0 51414 66745 0 0 3 0x14200 bored softnet 80553 283422 0 0 2 0x14200 systqmp 29361 247871 0 0 3 0x14200 bored systq 34502 10991 0 0 3 0x40014200 bored softclock 88023 305679 0 0 3 0x40014200 idle0 1 76295 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 9521 6375K 6882K 78643K 11790 0 pcb 13 8K 8K 78643K 137 0 rtable 125 9K 13K 78643K 625 0 ifaddr 93 17K 19K 78643K 223 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 37 0 ioctlops 0 0K 4K 78643K 172 0 iov 0 0K 32K 78643K 96 0 mount 1 1K 1K 78643K 1 0 vnodes 1225 77K 77K 78643K 1605 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 14 0 VM map 2 0K 0K 78643K 2 0 sem 12 1K 1K 78643K 115 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 932 0 sigio 0 0K 0K 78643K 6 0 proc 50 38K 63K 78643K 493 0 subproc 23 1K 2K 78643K 51 0 NFS srvsock 1 0K 0K 78643K 1 0 NFS daemon 1 16K 16K 78643K 1 0 ip_moptions 0 0K 0K 78643K 523 0 in_multi 41 2K 2K 78643K 232 0 ether_multi 1 0K 0K 78643K 26 0 mrt 0 0K 0K 78643K 9 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 245 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 144 89K 98K 78643K 3126 0 UVM aobj 41 4K 4K 78643K 47 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 1K 78643K 105 0 NDP 15 0K 0K 78643K 52 0 temp 135 3871K 3935K 78643K 31894 0 kqueue 5 8K 12K 78643K 63 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 13 0 9 1 0 1 1 0 8 0 rtpcb 80 47 0 45 1 0 1 1 0 8 0 rtentry 112 96 0 57 2 0 2 2 0 8 0 unpcb 120 1391 0 1383 1 0 1 1 0 8 0 syncache 264 13 0 13 5 4 1 1 0 8 1 tcpqe 32 42 0 42 2 2 0 1 0 8 0 tcpcb 544 708 0 703 6 4 2 2 0 8 0 ipq 40 10 0 10 2 2 0 1 0 8 0 ipqe 40 71 0 71 2 2 0 1 0 8 0 inpcb 296 1271 0 1263 3 1 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 ip6q 72 1 0 1 1 0 1 1 0 8 1 ip6af 40 2 0 2 1 0 1 1 0 8 1 nd6 48 32 0 26 1 0 1 1 0 8 0 pkpcb 40 4 0 4 2 2 0 1 0 8 0 ppxss 1136 6 0 6 3 3 0 1 0 8 0 pfstscr 40 6 0 5 1 0 1 1 0 8 0 pfrktable 1344 80 0 69 6 5 1 2 0 8 0 pftag 88 8 0 4 1 0 1 1 0 8 0 pfstitem 24 6 0 4 1 0 1 1 0 8 0 pfstkey 112 12 0 10 1 0 1 1 0 8 0 pfstate 328 6 0 5 1 0 1 1 0 8 0 pfrule 1360 50 0 24 3 0 3 3 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 297 0 105 13 0 13 13 0 8 0 art_table 32 298 0 105 2 0 2 2 0 8 0 art_node 16 95 0 55 1 0 1 1 0 8 0 sysvmsgpl 40 36 0 28 4 3 1 1 0 8 0 semupl 112 4 0 4 1 1 0 1 0 8 0 semapl 112 107 0 97 1 0 1 1 0 8 0 shmpl 112 44 0 7 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2570 0 1171 88 0 88 88 0 8 0 ffsino 240 2570 0 1171 83 0 83 83 0 8 0 nchpl 144 4498 0 2914 60 0 60 60 0 8 0 uvmvnodes 72 2901 0 0 53 0 53 53 0 8 0 vnodes 208 2901 0 0 153 0 153 153 0 8 0 namei 1024 11860 0 11860 2 1 1 1 0 8 1 vcpupl 1984 8 0 0 1 0 1 1 0 8 0 vmpool 528 17 0 9 2 1 1 1 0 8 0 pfiaddrpl 120 34 0 24 1 0 1 1 0 8 0 scxspl 192 12122 0 12122 1 0 1 1 0 8 1 plimitpl 152 77 0 68 1 0 1 1 0 8 0 sigapl 424 1139 0 1090 6 0 6 6 0 8 0 futexpl 56 19129 0 19128 2 1 1 1 0 8 0 knotepl 112 167 0 149 1 0 1 1 0 8 0 kqueuepl 144 692 0 687 1 0 1 1 0 8 0 pipepl 272 171 0 162 2 1 1 2 0 8 0 fdescpl 432 1102 0 1088 2 0 2 2 0 8 0 filepl 120 7993 0 7905 4 0 4 4 0 8 0 lockfpl 104 189 0 188 1 0 1 1 0 8 0 lockfspl 48 67 0 66 1 0 1 1 0 8 0 sessionpl 112 19 0 9 1 0 1 1 0 8 0 pgrppl 48 33 0 23 1 0 1 1 0 8 0 ucredpl 96 640 0 633 1 0 1 1 0 8 0 zombiepl 144 1091 0 1090 1 0 1 1 0 8 0 processpl 928 1139 0 1090 7 0 7 7 0 8 0 procpl 624 2337 0 2279 6 1 5 6 0 8 0 sosppl 128 13 0 13 3 3 0 1 0 8 0 sockpl 400 2714 0 2696 11 7 4 5 0 8 2 mcl64k 65536 40 0 40 4 4 0 1 0 8 0 mcl16k 16384 10 0 10 4 4 0 1 0 8 0 mcl12k 12288 28 0 28 4 4 0 1 0 8 0 mcl9k 9216 11 0 11 4 3 1 1 0 8 1 mcl8k 8192 30 0 30 5 4 1 1 0 8 1 mcl4k 4096 94 0 94 3 2 1 1 0 8 1 mcl2k2 2112 9 0 9 5 5 0 1 0 8 0 mcl2k 2048 87650 0 87608 17 11 6 13 0 8 0 mtagpl 96 88 0 78 3 2 1 2 0 8 0 mbufpl 256 146528 0 146408 26 9 17 18 0 8 1 bufpl 280 5246 0 135 366 0 366 366 0 8 0 anonpl 16 243147 0 226434 100 29 71 85 0 107 0 amapchunkpl 152 5893 0 5748 34 28 6 14 0 158 0 amappl16 192 12132 0 11201 58 9 49 54 0 8 2 amappl15 184 541 0 536 1 0 1 1 0 8 0 amappl14 176 372 0 364 1 0 1 1 0 8 0 amappl13 168 35 0 32 1 0 1 1 0 8 0 amappl12 160 8 0 6 1 0 1 1 0 8 0 amappl11 152 396 0 386 1 0 1 1 0 8 0 amappl10 144 115 0 107 1 0 1 1 0 8 0 amappl9 136 368 0 366 1 0 1 1 0 8 0 amappl8 128 385 0 334 2 0 2 2 0 8 0 amappl7 120 115 0 102 1 0 1 1 0 8 0 amappl6 112 369 0 364 1 0 1 1 0 8 0 amappl5 104 709 0 696 1 0 1 1 0 8 0 amappl4 96 795 0 767 1 0 1 1 0 8 0 amappl3 88 138 0 133 1 0 1 1 0 8 0 amappl2 80 8504 0 8436 2 0 2 2 0 8 0 amappl1 72 35000 0 34575 23 14 9 17 0 8 0 amappl 80 2580 0 2532 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 46 0 6 1 0 1 1 0 8 0 uaddrrnd 24 1119 0 1097 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1119 0 1097 1 0 1 1 0 8 0 vmmpekpl 168 10375 0 10336 2 0 2 2 0 8 0 vmmpepl 168 148978 0 146908 151 39 112 125 0 357 16 vmsppl 272 1118 0 1097 3 1 2 2 0 8 0 pdppl 4096 2244 0 2202 8 2 6 6 0 8 0 pvpl 32 579732 0 559390 217 42 175 203 0 265 9 pmappl 200 1118 0 1097 2 0 2 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 290 0 53 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace in_delmulti(db) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000ae8300) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac6000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac6000) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac6000) 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(ffff80001d79f510) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd8066ebe8f0,7,fffffd806c3bf900,ffff80001d6aa5f8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd8057412b50,ffff80001d6aa5f8) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8057412b50,ffff80001d6aa5f8) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd8057412b50,ffff80001d6aa5f8) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd8057412b50,ffff80001d6aa5f8) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6aa5f8) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6aa5f8,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff80001d6aa5f8,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff80001d6aa5f8,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff80001d6aa5f8) at userret+0x159 sys/kern/kern_sig.c:1872 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x7f7ffffca2d0, count: -16 ddb> machine ddbcpu 1 No such command ddb> trace in_delmulti(db) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000ae8300) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac6000) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac6000) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac6000) 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(ffff80001d79f510) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd8066ebe8f0,7,fffffd806c3bf900,ffff80001d6aa5f8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd8057412b50,ffff80001d6aa5f8) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8057412b50,ffff80001d6aa5f8) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd8057412b50,ffff80001d6aa5f8) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd8057412b50,ffff80001d6aa5f8) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6aa5f8) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6aa5f8,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff80001d6aa5f8,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff80001d6aa5f8,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff80001d6aa5f8) at userret+0x159 sys/kern/kern_sig.c:1872 Xsyscall() at Xsyscall+0x156 end of kernel end trace frame: 0x7f7ffffca2d0, count: -16