uvm_fault(0xfffffd806bc0aee0, 0x3fff7ee000b, 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(0xfffffd806bc0aee0, 0x3fff7ee000b, 0, 1) -> e in_delmulti(3fff7edffff) at in_delmulti+0x8d sys/netinet/in.c:914 end trace frame: 0xffff80001d76d610, count: 0 ddb> trace in_delmulti(3fff7edffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b13500) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ioctl_change_ifaddr(80206919,ffff80001d76d800,ffff800000aed800,1) at in_ioctl_change_ifaddr+0x1c2 in_ioctl(80206919,ffff80001d76d800,ffff800000aed800,1) at in_ioctl+0x2fb sys/netinet/in.c:246 ifioctl(fffffd80576ba978,80206919,ffff80001d76d800,ffff80001d6be290) at ifioctl+0xe60 sys/net/if.c:2174 sys_ioctl(ffff80001d6be290,ffff80001d76d918,ffff80001d76d960) at sys_ioctl+0x4a1 syscall(ffff80001d76d9e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2d82b33a0c0, count: -8 ddb> show registers rdi 0xffff8000209a8000 rsi 0x1540 __ALIGN_SIZE+0x540 rbp 0xffff80001d76d5c0 rbx 0 rdx 0xffff8000209a8000 rcx 0x153f __ALIGN_SIZE+0x53f rax 0xffffffff817ba21d in_delmulti+0x8d r8 0xffff800000b13500 r9 0xffffffff81256843 rt_ifa_purge+0x153 r10 0x5 r11 0x29b717765e0a1f38 r12 0 r13 0x3 r14 0x3fff7edffff r15 0x1 rip 0xffffffff817ba21d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d76d560 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.1) pid=338666 stat=onproc flags process=0 proc=4000000 pri=32, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6bfb40,0xffffffff8280e530 process=0xffff80001d6c1280 user=0xffff80001d768000, vmspace=0xfffffd806bc0aee0 estcpu=29, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 20687 383688 29969 0 2 0 syz-executor.1 *20687 338666 29969 0 7 0x4000000 syz-executor.1 29969 398997 47899 0 3 0x82 nanosleep syz-executor.1 56900 117625 0 0 3 0x14200 bored sosplice 36927 416758 47899 0 3 0x82 piperd syz-executor.0 47899 468253 27749 0 3 0x82 thrsleep syz-fuzzer 47899 430304 27749 0 3 0x4000082 nanosleep syz-fuzzer 47899 173066 27749 0 3 0x4000082 thrsleep syz-fuzzer 47899 14549 27749 0 2 0x4000002 syz-fuzzer 47899 411434 27749 0 3 0x4000082 thrsleep syz-fuzzer 47899 85626 27749 0 3 0x4000082 thrsleep syz-fuzzer 47899 455217 27749 0 3 0x4000082 thrsleep syz-fuzzer 27749 60748 75604 0 3 0x10008a pause ksh 75604 389283 88844 0 3 0x92 select sshd 22011 7259 1 0 3 0x100083 ttyin getty 88844 438462 1 0 3 0x80 select sshd 60318 477942 91451 73 3 0x100090 kqread syslogd 91451 116714 1 0 3 0x100082 netio syslogd 13213 244906 1 77 3 0x100090 poll dhclient 15122 308690 1 0 3 0x80 poll dhclient 56910 212128 0 0 3 0x14200 bored smr 51988 486035 0 0 2 0x14200 zerothread 65153 231370 0 0 3 0x14200 aiodoned aiodoned 96036 124009 0 0 3 0x14200 syncer update 87202 140902 0 0 3 0x14200 cleaner cleaner 17966 298805 0 0 3 0x14200 reaper reaper 15527 463082 0 0 3 0x14200 pgdaemon pagedaemon 56999 486689 0 0 3 0x14200 bored crynlk 48680 239274 0 0 3 0x14200 bored crypto 73610 307344 0 0 3 0x40014200 acpi0 acpi0 60441 133034 0 0 3 0x14200 bored softnet 55583 396742 0 0 3 0x14200 bored systqmp 66441 71341 0 0 3 0x14200 bored systq 38583 58318 0 0 3 0x40014200 bored softclock 37588 332279 0 0 3 0x40014200 idle0 1 38975 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 9484 6337K 6530K 78643K 10827 0 pcb 13 8K 9K 78643K 333 0 rtable 97 3K 7K 78643K 374 0 ifaddr 61 12K 14K 78643K 125 0 counters 21 16K 16K 78643K 26 0 ioctlops 0 0K 4K 78643K 52 0 iov 0 0K 12K 78643K 20 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1312 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 3 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 1K 78643K 58 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 5 13K 25K 78643K 243 0 sigio 0 0K 0K 78643K 2 0 proc 51 38K 63K 78643K 410 0 subproc 32 2K 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 26 0 in_multi 35 2K 2K 78643K 90 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 43 201K 201K 78643K 43 0 exec 0 0K 1K 78643K 210 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 130 55K 75K 78643K 1404 0 UVM aobj 14 2K 2K 78643K 14 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 21 0 NDP 11 0K 0K 78643K 24 0 temp 97 3855K 3919K 78643K 4702 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 9 0 4 1 0 1 1 0 8 0 rtpcb 88 39 0 37 1 0 1 1 0 8 0 rtentry 112 73 0 35 2 0 2 2 0 8 0 unpcb 120 105 0 97 1 0 1 1 0 8 0 syncache 272 8 0 8 2 1 1 1 0 8 1 tcpqe 32 717 0 717 1 1 0 1 0 8 0 tcpcb 592 98 0 92 2 1 1 2 0 8 0 inpcb 296 598 0 581 2 0 2 2 0 8 0 nd6 48 16 0 12 1 0 1 1 0 8 0 pkpcb 40 25 0 25 3 2 1 1 0 8 1 pfrktable 1344 28 0 28 2 1 1 1 0 8 1 pftag 88 4 0 4 1 0 1 1 0 8 1 pfrule 1360 8 0 6 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 337 0 168 14 1 13 14 0 8 0 art_table 32 338 0 168 2 0 2 2 0 8 0 art_node 16 72 0 37 1 0 1 1 0 8 0 sysvmsgpl 40 6 0 2 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 52 0 42 1 0 1 1 0 8 0 shmpl 112 11 0 0 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1679 0 281 88 0 88 88 0 8 0 ffsino 240 1679 0 281 83 0 83 83 0 8 0 nchpl 144 2166 0 577 60 0 60 60 0 8 0 uvmvnodes 72 1790 0 0 33 0 33 33 0 8 0 vnodes 208 1790 0 0 95 0 95 95 0 8 0 namei 1024 5719 0 5719 1 0 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 528 3 0 1 1 0 1 1 0 8 0 pfiaddrpl 120 8 0 8 1 0 1 1 0 8 1 scxspl 200 6300 0 6300 1 0 1 1 0 8 1 plimitpl 152 26 0 19 1 0 1 1 0 8 0 sigapl 424 427 0 398 4 0 4 4 0 8 0 futexpl 56 4476 0 4476 1 0 1 1 0 8 1 knotepl 112 76 0 56 1 0 1 1 0 8 0 kqueuepl 152 26 0 24 1 0 1 1 0 8 0 pipepl 272 97 0 86 1 0 1 1 0 8 0 fdescpl 432 412 0 398 2 0 2 2 0 8 0 filepl 120 2467 0 2362 4 0 4 4 0 8 0 lockfpl 104 81 0 80 1 0 1 1 0 8 0 lockfspl 48 26 0 25 1 0 1 1 0 8 0 sessionpl 120 18 0 8 1 0 1 1 0 8 0 pgrppl 48 22 0 12 1 0 1 1 0 8 0 ucredpl 96 165 0 158 1 0 1 1 0 8 0 zombiepl 144 398 0 398 1 0 1 1 0 8 1 processpl 944 427 0 398 4 0 4 4 0 8 0 procpl 632 662 0 626 4 0 4 4 0 8 0 sosppl 144 10 0 10 2 1 1 1 0 8 1 sockpl 400 778 0 753 4 1 3 4 0 8 0 mcl64k 65536 21 0 21 1 1 0 1 0 8 0 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl12k 12288 12 0 12 1 0 1 1 0 8 1 mcl9k 9216 3 0 3 1 1 0 1 0 8 0 mcl8k 8192 13 0 13 2 1 1 1 0 8 1 mcl4k 4096 22 0 22 3 3 0 1 0 8 0 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 94767 0 94702 34 25 9 31 0 8 0 mtagpl 96 21 0 4 2 1 1 1 0 8 0 mbufpl 256 151701 0 151522 31 8 23 23 0 8 3 bufpl 280 3638 0 117 252 0 252 252 0 8 0 anonpl 16 60919 0 41879 82 4 78 78 0 107 1 amapchunkpl 152 2328 0 2144 22 1 21 21 0 158 13 amappl16 192 2138 0 1116 63 11 52 59 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 55 0 54 1 0 1 1 0 8 0 amappl13 168 148 0 142 1 0 1 1 0 8 0 amappl12 160 21 0 17 1 0 1 1 0 8 0 amappl11 152 94 0 84 1 0 1 1 0 8 0 amappl10 144 25 0 20 1 0 1 1 0 8 0 amappl9 136 381 0 379 1 0 1 1 0 8 0 amappl8 128 345 0 315 2 0 2 2 0 8 0 amappl7 120 109 0 97 1 0 1 1 0 8 0 amappl6 112 28 0 22 1 0 1 1 0 8 0 amappl5 104 315 0 303 1 0 1 1 0 8 0 amappl4 96 599 0 569 1 0 1 1 0 8 0 amappl3 88 179 0 170 1 0 1 1 0 8 0 amappl2 80 2414 0 2350 2 0 2 2 0 8 0 amappl1 72 18135 0 17721 24 15 9 17 0 8 0 amappl 80 911 0 857 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 13 0 0 1 0 1 1 0 8 0 uaddrrnd 24 415 0 399 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 415 0 399 1 0 1 1 0 8 0 vmmpekpl 168 6710 0 6687 2 0 2 2 0 8 0 vmmpepl 168 58067 0 55952 131 29 102 124 0 357 10 vmsppl 272 414 0 399 2 0 2 2 0 8 1 pdppl 4096 836 0 800 6 1 5 6 0 8 0 pvpl 32 181503 0 159443 191 9 182 182 0 265 4 pmappl 200 414 0 399 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 280 0 45 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace in_delmulti(3fff7edffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b13500) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ioctl_change_ifaddr(80206919,ffff80001d76d800,ffff800000aed800,1) at in_ioctl_change_ifaddr+0x1c2 in_ioctl(80206919,ffff80001d76d800,ffff800000aed800,1) at in_ioctl+0x2fb sys/netinet/in.c:246 ifioctl(fffffd80576ba978,80206919,ffff80001d76d800,ffff80001d6be290) at ifioctl+0xe60 sys/net/if.c:2174 sys_ioctl(ffff80001d6be290,ffff80001d76d918,ffff80001d76d960) at sys_ioctl+0x4a1 syscall(ffff80001d76d9e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2d82b33a0c0, count: -8 ddb> machine ddbcpu 1 No such command ddb> trace in_delmulti(3fff7edffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b13500) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ioctl_change_ifaddr(80206919,ffff80001d76d800,ffff800000aed800,1) at in_ioctl_change_ifaddr+0x1c2 in_ioctl(80206919,ffff80001d76d800,ffff800000aed800,1) at in_ioctl+0x2fb sys/netinet/in.c:246 ifioctl(fffffd80576ba978,80206919,ffff80001d76d800,ffff80001d6be290) at ifioctl+0xe60 sys/net/if.c:2174 sys_ioctl(ffff80001d6be290,ffff80001d76d918,ffff80001d76d960) at sys_ioctl+0x4a1 syscall(ffff80001d76d9e0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:570 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2d82b33a0c0, count: -8