uvm_fault(0xffffffff82795140, 0xffffffff0000000b, 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(0xffffffff82795140, 0xffffffff0000000b, 0, 1) -> e in_delmulti(fffffffeffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 end trace frame: 0xffff80001e3a95e0, count: 0 ddb> trace in_delmulti(fffffffeffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b10200) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac6800) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac6800) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac6800) 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(ffff80001e3a97c0) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805dcd5c30,7,fffffd806c3bfb40,ffff80001d6a99c8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd805754d790,ffff80001d6a99c8) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd805754d790,ffff80001d6a99c8) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd805754d790,ffff80001d6a99c8) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd805754d790,ffff80001d6a99c8) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6a99c8) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6a99c8,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff80001d6a99c8,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff80001d6a99c8,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff80001d6a99c8) at userret+0x159 sys/kern/kern_sig.c:1872 syscall(ffff80001e3a9c40) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001e3a9c40) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd8c30, count: -17 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff80001e3a9590 rbx 0 rdx 0x3 rcx 0x1 rax 0 r8 0xffffffff818ebc13 rt_ifa_purge+0x153 r9 0x5 r10 0x71c2dc27e5f94301 r11 0x9fc60a823ef5306e r12 0 r13 0x3 r14 0xfffffffeffffffff r15 0x1 rip 0xffffffff81e46f2d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001e3a9530 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.1) pid=453455 stat=onproc flags process=a proc=2000 pri=32, usrpri=65, nice=20 forw=0xffffffffffffffff, list=0xffff80001d6a9758,0xffff80001d6a9c48 process=0xffff80001d6c4e90 user=0xffff80001e3a4000, vmspace=0xfffffd806bc09440 estcpu=36, cpticks=2, pctcpu=0.0 user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 29594 207297 0 0 3 0x14200 bored sosplice 9400 19280 77977 0 3 0x2 biowait syz-executor.0 77977 386260 70733 0 3 0x82 thrsleep syz-fuzzer 77977 398282 70733 0 3 0x4000082 nanosleep syz-fuzzer 77977 320888 70733 0 3 0x4000082 kqread syz-fuzzer 77977 4897 70733 0 3 0x4000082 thrsleep syz-fuzzer 77977 7862 70733 0 3 0x4000082 thrsleep syz-fuzzer 77977 288984 70733 0 3 0x4000082 thrsleep syz-fuzzer 77977 199544 70733 0 3 0x4000082 thrsleep syz-fuzzer 77977 296707 70733 0 3 0x4000082 thrsleep syz-fuzzer 70733 461177 68407 0 3 0x10008a pause ksh 68407 414782 35665 0 3 0x92 select sshd 47026 332806 1 0 3 0x100083 ttyin getty 35665 520262 1 0 3 0x80 select sshd 81847 58764 69225 73 3 0x100090 kqread syslogd 69225 134729 1 0 3 0x100082 netio syslogd 88918 494677 1 77 2 0x100090 dhclient 31238 348164 1 0 3 0x80 poll dhclient 45472 114372 0 0 3 0x14200 bored smr 49068 209652 0 0 3 0x14200 pgzero zerothread 79742 331105 0 0 3 0x14200 aiodoned aiodoned 14492 358731 0 0 3 0x14200 syncer update 90533 218192 0 0 3 0x14200 cleaner cleaner 55359 378364 0 0 3 0x14200 reaper reaper 13917 236658 0 0 3 0x14200 pgdaemon pagedaemon 6266 487712 0 0 3 0x14200 bored crynlk 98137 317352 0 0 3 0x14200 bored crypto 14266 247271 0 0 3 0x40014200 acpi0 acpi0 86619 172533 0 0 3 0x14200 bored softnet 80977 364710 0 0 2 0x14200 systqmp 60161 118904 0 0 3 0x14200 bored systq 30404 306547 0 0 3 0x40014200 bored softclock 77016 406409 0 0 3 0x40014200 idle0 1 109321 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 9459 6335K 6464K 78643K 10737 0 pcb 13 8K 8K 78643K 61 0 rtable 87 4K 5K 78643K 230 0 ifaddr 54 13K 13K 78643K 64 0 sysctl 2 0K 0K 78643K 2 0 counters 21 16K 16K 78643K 21 0 ioctlops 0 0K 4K 78643K 59 0 iov 0 0K 20K 78643K 59 0 mount 1 1K 1K 78643K 1 0 vnodes 1220 77K 77K 78643K 1324 0 UFS quota 1 32K 32K 78643K 1 0 UFS mount 5 36K 36K 78643K 5 0 shm 2 1K 5K 78643K 5 0 VM map 2 0K 0K 78643K 2 0 sem 12 0K 0K 78643K 88 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 4 9K 25K 78643K 298 0 sigio 0 0K 0K 78643K 4 0 proc 49 38K 63K 78643K 373 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 13 0 in_multi 61 3K 3K 78643K 96 0 ether_multi 1 0K 0K 78643K 11 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 203 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 132 72K 72K 78643K 1545 0 UVM aobj 16 2K 3K 78643K 23 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 32 0 NDP 6 0K 0K 78643K 10 0 temp 73 3851K 3927K 78643K 16676 0 kqueue 3 4K 18K 78643K 25 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 80 33 0 31 1 0 1 1 0 8 0 rtentry 112 46 0 17 2 0 2 2 0 8 0 unpcb 120 147 0 139 1 0 1 1 0 8 0 syncache 264 4 0 4 1 1 0 1 0 8 0 tcpqe 32 384 0 384 1 1 0 1 0 8 0 tcpcb 544 86 0 78 1 0 1 1 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 4 0 4 1 1 0 1 0 8 0 inpcb 296 266 0 259 2 1 1 2 0 8 0 nd6 48 6 0 0 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 pfrktable 1344 6 0 2 1 0 1 1 0 8 0 pfrule 1360 8 0 2 1 0 1 1 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 220 0 72 12 1 11 12 0 8 0 art_table 32 221 0 72 2 0 2 2 0 8 0 art_node 16 45 0 16 1 0 1 1 0 8 0 sysvmsgpl 40 8 0 0 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 80 0 70 1 0 1 1 0 8 0 shmpl 112 20 0 9 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1876 0 478 88 0 88 88 0 8 0 ffsino 240 1876 0 478 83 0 83 83 0 8 0 nchpl 144 2538 0 937 60 0 60 60 0 8 0 uvmvnodes 72 1966 0 0 36 0 36 36 0 8 0 vnodes 208 1966 0 0 104 0 104 104 0 8 0 namei 1024 7005 0 7005 2 1 1 1 0 8 1 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 528 8 0 4 1 0 1 1 0 8 0 pfiaddrpl 120 4 0 0 1 0 1 1 0 8 0 scxspl 192 7818 0 7817 1 0 1 1 0 8 0 plimitpl 152 20 0 13 1 0 1 1 0 8 0 sigapl 424 485 0 457 4 0 4 4 0 8 0 futexpl 56 6067 0 6067 1 0 1 1 0 8 1 knotepl 112 87 0 70 1 0 1 1 0 8 0 kqueuepl 144 40 0 38 1 0 1 1 0 8 0 pipepl 272 108 0 99 2 1 1 2 0 8 0 fdescpl 432 470 0 457 2 0 2 2 0 8 0 filepl 120 3000 0 2916 4 0 4 4 0 8 1 lockfpl 104 49 0 48 1 0 1 1 0 8 0 lockfspl 48 20 0 19 1 0 1 1 0 8 0 sessionpl 112 17 0 7 1 0 1 1 0 8 0 pgrppl 48 19 0 9 1 0 1 1 0 8 0 ucredpl 96 635 0 628 1 0 1 1 0 8 0 zombiepl 144 458 0 457 2 1 1 1 0 8 0 processpl 928 485 0 457 4 0 4 4 0 8 0 procpl 624 811 0 776 6 2 4 4 0 8 1 sosppl 128 2 0 2 1 1 0 1 0 8 0 sockpl 400 448 0 431 3 0 3 3 0 8 1 mcl64k 65536 4 0 4 2 2 0 1 0 8 0 mcl16k 16384 2 0 2 2 2 0 1 0 8 0 mcl12k 12288 9 0 9 2 1 1 1 0 8 1 mcl9k 9216 3 0 3 3 2 1 1 0 8 1 mcl8k 8192 7 0 7 3 2 1 1 0 8 1 mcl4k 4096 34 0 34 3 2 1 1 0 8 1 mcl2k 2048 94924 0 94864 28 20 8 25 0 8 0 mtagpl 96 21 0 13 2 1 1 1 0 8 0 mbufpl 256 150981 0 150877 14 6 8 13 0 8 0 bufpl 280 4125 0 126 286 0 286 286 0 8 0 anonpl 16 56578 0 39843 71 1 70 70 0 107 0 amapchunkpl 152 1995 0 1867 8 1 7 8 0 158 0 amappl16 192 1938 0 995 49 1 48 48 0 8 0 amappl15 184 1 0 0 1 0 1 1 0 8 0 amappl14 176 161 0 151 1 0 1 1 0 8 0 amappl13 168 158 0 154 1 0 1 1 0 8 0 amappl12 160 144 0 139 1 0 1 1 0 8 0 amappl11 152 180 0 170 1 0 1 1 0 8 0 amappl10 144 13 0 8 1 0 1 1 0 8 0 amappl9 136 368 0 367 1 0 1 1 0 8 0 amappl8 128 329 0 287 2 0 2 2 0 8 0 amappl7 120 106 0 94 1 0 1 1 0 8 0 amappl6 112 157 0 152 1 0 1 1 0 8 0 amappl5 104 154 0 143 1 0 1 1 0 8 0 amappl4 96 684 0 656 1 0 1 1 0 8 0 amappl3 88 249 0 240 1 0 1 1 0 8 0 amappl2 80 2938 0 2880 2 0 2 2 0 8 0 amappl1 72 19564 0 19165 24 15 9 17 0 8 0 amappl 80 1056 0 1014 1 0 1 1 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 22 0 7 1 0 1 1 0 8 0 uaddrrnd 24 478 0 461 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 478 0 461 1 0 1 1 0 8 0 vmmpekpl 168 6834 0 6802 2 0 2 2 0 8 0 vmmpepl 168 64330 0 62365 122 26 96 112 0 357 2 vmsppl 272 477 0 461 3 1 2 2 0 8 0 pdppl 4096 962 0 926 7 1 6 6 0 8 1 pvpl 32 182173 0 162795 169 7 162 166 0 265 1 pmappl 200 477 0 461 2 1 1 2 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 266 0 43 7 0 7 7 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace in_delmulti(fffffffeffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b10200) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac6800) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac6800) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac6800) 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(ffff80001e3a97c0) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805dcd5c30,7,fffffd806c3bfb40,ffff80001d6a99c8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd805754d790,ffff80001d6a99c8) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd805754d790,ffff80001d6a99c8) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd805754d790,ffff80001d6a99c8) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd805754d790,ffff80001d6a99c8) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6a99c8) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6a99c8,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff80001d6a99c8,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff80001d6a99c8,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff80001d6a99c8) at userret+0x159 sys/kern/kern_sig.c:1872 syscall(ffff80001e3a9c40) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001e3a9c40) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd8c30, count: -17 ddb> machine ddbcpu 1 No such command ddb> trace in_delmulti(fffffffeffffffff) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000b10200) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac6800) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac6800) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac6800) 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(ffff80001e3a97c0) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd805dcd5c30,7,fffffd806c3bfb40,ffff80001d6a99c8) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd805754d790,ffff80001d6a99c8) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd805754d790,ffff80001d6a99c8) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd805754d790,ffff80001d6a99c8) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd805754d790,ffff80001d6a99c8) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff80001d6a99c8) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff80001d6a99c8,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff80001d6a99c8,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff80001d6a99c8,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff80001d6a99c8) at userret+0x159 sys/kern/kern_sig.c:1872 syscall(ffff80001e3a9c40) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001e3a9c40) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffd8c30, count: -17