uvm_fault(0xfffffd806bc0a440, 0xef, 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(0xfffffd806bc0a440, 0xef, 0, 1) -> e in_delmulti(e3) at in_delmulti+0x8d sys/netinet/in.c:914 end trace frame: 0xffff80001e59f4a0, count: 0 ddb> trace in_delmulti(e3) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b44b00) 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(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff80001e59f680) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd8061ee4b60,7,fffffd806c3bf8a0,ffff80001d6aa388) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd8057439cb8,ffff80001d6aa388) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8057439cb8,ffff80001d6aa388) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd8057439cb8,ffff80001d6aa388) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd8057439cb8,ffff80001d6aa388) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6aa388) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6aa388,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d6aa388,ffff80001e59f910,ffff80001e59f960) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80001e59f9e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbada0, count: -16 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff80001e59f450 rbx 0 rdx 0x3 rcx 0x1 rax 0 r8 0xffffffff815fff63 rt_ifa_purge+0x153 r9 0x5 r10 0xa976fcd005b4fa67 r11 0x1a40461048388bf0 r12 0 r13 0x3 r14 0xe3 r15 0x1 rip 0xffffffff819a982d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001e59f3f0 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.0) pid=455899 stat=onproc flags process=a proc=2000 pri=32, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6a94e8,0xffff80001d6a9018 process=0xffff80001d6c4750 user=0xffff80001e59a000, vmspace=0xfffffd806bc0a440 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 52324 32746 69181 0 3 0x82 piperd syz-executor.1 41103 368773 0 0 3 0x14200 acct acct 36157 124332 0 0 3 0x14200 bored sosplice 69181 442934 6490 0 3 0x82 thrsleep syz-fuzzer 69181 300827 6490 0 3 0x4000082 nanosleep syz-fuzzer 69181 354523 6490 0 3 0x4000082 thrsleep syz-fuzzer 69181 516485 6490 0 3 0x4000082 thrsleep syz-fuzzer 69181 392644 6490 0 3 0x4000082 thrsleep syz-fuzzer 69181 175588 6490 0 3 0x4000082 thrsleep syz-fuzzer 69181 230727 6490 0 3 0x4000082 thrsleep syz-fuzzer 69181 132477 6490 0 2 0x4000002 syz-fuzzer 6490 52587 46379 0 3 0x10008a pause ksh 46379 396624 7007 0 3 0x92 select sshd 23503 269316 1 0 3 0x100083 ttyin getty 7007 68722 1 0 3 0x80 select sshd 40658 403390 9775 73 3 0x100090 kqread syslogd 9775 350475 1 0 3 0x100082 netio syslogd 51758 161069 1 77 2 0x100090 dhclient 72689 161447 1 0 3 0x80 poll dhclient 53886 13082 0 0 3 0x14200 bored smr 49369 475721 0 0 2 0x14200 zerothread 80277 59305 0 0 3 0x14200 aiodoned aiodoned 8185 123667 0 0 3 0x14200 syncer update 83162 404457 0 0 3 0x14200 cleaner cleaner 3392 351187 0 0 3 0x14200 reaper reaper 76577 259819 0 0 3 0x14200 pgdaemon pagedaemon 7852 350255 0 0 3 0x14200 bored crynlk 81600 372136 0 0 3 0x14200 bored crypto 61267 403427 0 0 3 0x40014200 acpi0 acpi0 44474 102568 0 0 3 0x14200 bored softnet 82661 197552 0 0 2 0x14200 systqmp 83038 189378 0 0 3 0x14200 bored systq 66281 75983 0 0 3 0x40014200 bored softclock 29479 395093 0 0 3 0x40014200 idle0 1 110486 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 6346K 7424K 78643K 13564 0 pcb 13 8K 8K 78643K 85 0 rtable 122 8K 10K 78643K 628 0 ifaddr 71 15K 16K 78643K 208 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 32 0 ioctlops 0 0K 4K 78643K 100 0 iov 0 0K 16K 78643K 61 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 2001 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 1K 1K 78643K 14 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 4 9K 25K 78643K 847 0 sigio 0 0K 0K 78643K 18 0 proc 50 38K 63K 78643K 469 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 47 0 in_multi 73 3K 4K 78643K 204 0 ether_multi 1 0K 0K 78643K 15 0 mrt 0 0K 0K 78643K 3 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 214 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 124 55K 56K 78643K 2739 0 UVM aobj 44 2K 2K 78643K 46 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 45 0 NDP 10 0K 0K 78643K 34 0 temp 123 3864K 3928K 78643K 15068 0 kqueue 3 4K 14K 78643K 43 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 9 0 5 1 0 1 1 0 8 0 rtpcb 80 79 0 77 1 0 1 1 0 8 0 rtentry 112 86 0 45 2 0 2 2 0 8 0 unpcb 120 572 0 561 1 0 1 1 0 8 0 syncache 264 10 0 10 4 4 0 1 0 8 0 tcpqe 32 141 0 141 3 3 0 1 0 8 0 tcpcb 544 213 0 206 2 0 2 2 0 8 0 inpcb 296 928 0 918 2 0 2 2 0 8 1 rttmr 72 1 0 1 1 1 0 1 0 8 0 ip6q 72 2 0 1 2 1 1 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 48 30 0 24 1 0 1 1 0 8 0 ppxss 1136 2 0 2 2 2 0 1 0 8 0 pfrktable 1344 105 0 95 3 2 1 2 0 8 0 pftag 88 18 0 16 2 1 1 1 0 8 0 pfrule 1360 28 0 16 1 0 1 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 283 0 84 13 0 13 13 0 8 0 art_table 32 285 0 84 2 0 2 2 0 8 0 art_node 16 85 0 44 1 0 1 1 0 8 0 sysvmsgpl 40 2 0 0 1 0 1 1 0 8 0 semupl 112 5 0 5 1 1 0 1 0 8 0 semapl 112 10 0 0 1 0 1 1 0 8 0 shmpl 112 43 0 2 3 1 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 2444 0 1047 88 0 88 88 0 8 0 ffsino 240 2444 0 1047 83 0 83 83 0 8 0 nchpl 144 3726 0 2148 60 0 60 60 0 8 0 uvmvnodes 72 3177 0 0 58 0 58 58 0 8 0 vnodes 208 3177 0 0 168 0 168 168 0 8 0 namei 1024 10385 0 10385 1 0 1 1 0 8 1 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 528 4 0 0 1 0 1 1 0 8 0 pfiaddrpl 120 36 0 28 1 0 1 1 0 8 0 scxspl 192 10605 0 10605 1 0 1 1 0 8 1 plimitpl 152 65 0 58 1 0 1 1 0 8 0 sigapl 424 1032 0 1003 4 0 4 4 0 8 0 futexpl 56 15808 0 15808 1 0 1 1 0 8 1 knotepl 112 132 0 115 1 0 1 1 0 8 0 kqueuepl 144 96 0 93 1 0 1 1 0 8 0 pipepl 272 167 0 158 1 0 1 1 0 8 0 fdescpl 432 1016 0 1003 2 0 2 2 0 8 0 filepl 120 5571 0 5487 4 0 4 4 0 8 1 lockfpl 104 1013 0 1012 1 0 1 1 0 8 0 lockfspl 48 486 0 485 1 0 1 1 0 8 0 sessionpl 112 18 0 8 1 0 1 1 0 8 0 pgrppl 48 20 0 10 1 0 1 1 0 8 0 ucredpl 96 545 0 538 1 0 1 1 0 8 0 zombiepl 144 1004 0 1003 1 0 1 1 0 8 0 processpl 928 1032 0 1003 4 0 4 4 0 8 0 procpl 624 1986 0 1950 4 0 4 4 0 8 0 sosppl 128 2 0 2 1 1 0 1 0 8 0 sockpl 400 1581 0 1558 6 3 3 4 0 8 0 mcl64k 65536 31 0 31 1 1 0 1 0 8 0 mcl16k 16384 1 0 1 1 1 0 1 0 8 0 mcl12k 12288 30 0 30 2 2 0 1 0 8 0 mcl9k 9216 15 0 15 3 3 0 1 0 8 0 mcl8k 8192 295 0 295 3 2 1 1 0 8 1 mcl4k 4096 78 0 78 2 1 1 1 0 8 1 mcl2k2 2112 3 0 3 2 2 0 1 0 8 0 mcl2k 2048 96301 0 96254 17 9 8 14 0 8 1 mtagpl 96 424 0 376 8 1 7 7 0 8 2 mbufpl 256 158140 0 157921 57 5 52 54 0 8 6 bufpl 280 4403 0 128 306 0 306 306 0 8 0 anonpl 16 102662 0 85370 86 16 70 76 0 107 0 amapchunkpl 152 4230 0 4092 15 9 6 11 0 158 0 amappl16 192 4493 0 3554 52 4 48 49 0 8 0 amappl15 184 3 0 0 1 0 1 1 0 8 0 amappl14 176 27 0 22 1 0 1 1 0 8 0 amappl13 168 41 0 38 1 0 1 1 0 8 0 amappl12 160 160 0 158 2 1 1 1 0 8 0 amappl11 152 56 0 46 1 0 1 1 0 8 0 amappl10 144 252 0 248 1 0 1 1 0 8 0 amappl9 136 751 0 749 1 0 1 1 0 8 0 amappl8 128 367 0 319 2 0 2 2 0 8 0 amappl7 120 350 0 336 1 0 1 1 0 8 0 amappl6 112 24 0 19 1 0 1 1 0 8 0 amappl5 104 1163 0 1151 1 0 1 1 0 8 0 amappl4 96 436 0 406 1 0 1 1 0 8 0 amappl3 88 145 0 140 1 0 1 1 0 8 0 amappl2 80 7247 0 7187 2 0 2 2 0 8 0 amappl1 72 31692 0 31298 22 12 10 17 0 8 0 amappl 80 2225 0 2184 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 45 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1020 0 1003 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1020 0 1003 1 0 1 1 0 8 0 vmmpekpl 168 8952 0 8921 3 1 2 2 0 8 0 vmmpepl 168 128049 0 126098 148 57 91 124 0 357 1 vmsppl 272 1019 0 1003 2 0 2 2 0 8 0 pdppl 4096 2046 0 2010 7 2 5 6 0 8 0 pvpl 32 300978 0 280752 201 34 167 180 0 265 3 pmappl 200 1019 0 1003 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 296 0 26 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace in_delmulti(e3) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b44b00) 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(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff80001e59f680) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd8061ee4b60,7,fffffd806c3bf8a0,ffff80001d6aa388) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd8057439cb8,ffff80001d6aa388) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8057439cb8,ffff80001d6aa388) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd8057439cb8,ffff80001d6aa388) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd8057439cb8,ffff80001d6aa388) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6aa388) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6aa388,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d6aa388,ffff80001e59f910,ffff80001e59f960) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80001e59f9e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbada0, count: -16 ddb> machine ddbcpu 1 No such command ddb> trace in_delmulti(e3) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b44b00) 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(5d00,7) at tun_dev_close+0x160 sys/net/if_tun.c:477 spec_close(ffff80001e59f680) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd8061ee4b60,7,fffffd806c3bf8a0,ffff80001d6aa388) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd8057439cb8,ffff80001d6aa388) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd8057439cb8,ffff80001d6aa388) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd8057439cb8,ffff80001d6aa388) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd8057439cb8,ffff80001d6aa388) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6aa388) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6aa388,0,0,1) at exit1+0x32c sys/kern/kern_exit.c:197 sys_exit(ffff80001d6aa388,ffff80001e59f910,ffff80001e59f960) at sys_exit+0x16 sys/kern/kern_exit.c:95 syscall(ffff80001e59f9e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffbada0, count: -16