uvm_fault(0xfffffd806bc0add0, 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(0xfffffd806bc0add0, 0xef, 0, 1) -> e in_delmulti(e3) at in_delmulti+0x8d sys/netinet/in.c:914 end trace frame: 0xffff80001d7a4f60, count: 0 ddb> trace in_delmulti(e3) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000af2d00) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac7800) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac7800) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac7800) 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(ffff80001d7a5140) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd8066532820,7,fffffd806c3bfba0,ffff8000ffff9b30) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80572dbbc8,ffff8000ffff9b30) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80572dbbc8,ffff8000ffff9b30) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80572dbbc8,ffff8000ffff9b30) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80572dbbc8,ffff8000ffff9b30) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000ffff9b30) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff8000ffff9b30,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff8000ffff9b30,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff8000ffff9b30,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff8000ffff9b30) at userret+0x159 sys/kern/kern_sig.c:1872 syscall(ffff80001d7a55c0) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001d7a55c0) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffce380, count: -17 ddb> show registers rdi 0x2 rsi 0 rbp 0xffff80001d7a4f10 rbx 0 rdx 0 rcx 0x1 rax 0xffff8000ffff9b30 r8 0xffff800000af2d00 r9 0xffffffff817c4993 rt_ifa_purge+0x153 r10 0x5 r11 0xa824bd5f39148865 r12 0 r13 0x3 r14 0xe3 r15 0x1 rip 0xffffffff81b5242d in_delmulti+0x8d cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80001d7a4eb0 ss 0x10 in_delmulti+0x8d: movl 0xc(%r14),%r15d ddb> show proc PROC (syz-executor.1) pid=364710 stat=onproc flags process=a proc=2000 pri=32, usrpri=74, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff84f8,0xffff80001d6be2a0 process=0xffff80001d6c0ed0 user=0xffff80001d7a0000, vmspace=0xfffffd806bc0add0 estcpu=36, cpticks=0, pctcpu=0.2 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 76144 106169 0 0 3 0x14200 acct acct 62134 266986 86075 0 2 0x2 syz-executor.0 86075 53545 9510 0 3 0x82 thrsleep syz-fuzzer 86075 522428 9510 0 2 0x4000082 syz-fuzzer 86075 204330 9510 0 3 0x4000082 thrsleep syz-fuzzer 86075 37469 9510 0 3 0x4000082 thrsleep syz-fuzzer 86075 131843 9510 0 3 0x4000082 thrsleep syz-fuzzer 86075 211850 9510 0 2 0x4000002 syz-fuzzer 86075 354380 9510 0 3 0x4000082 thrsleep syz-fuzzer 86075 239624 9510 0 3 0x4000082 thrsleep syz-fuzzer 9510 38811 31374 0 3 0x10008a pause ksh 31374 81124 92519 0 3 0x92 select sshd 52157 303803 1 0 3 0x100083 ttyin getty 92519 68820 1 0 3 0x80 select sshd 540 19618 79536 73 3 0x100090 kqread syslogd 79536 366383 1 0 3 0x100082 netio syslogd 68038 29452 1 77 2 0x100090 dhclient 75206 389399 1 0 3 0x80 poll dhclient 38552 194420 0 0 3 0x14200 bored smr 1469 12836 0 0 3 0x14200 pgzero zerothread 58741 449646 0 0 3 0x14200 aiodoned aiodoned 52132 79793 0 0 3 0x14200 syncer update 48188 203175 0 0 3 0x14200 cleaner cleaner 62006 26564 0 0 3 0x14200 reaper reaper 17842 221029 0 0 3 0x14200 pgdaemon pagedaemon 38939 279191 0 0 3 0x14200 bored crynlk 72579 404176 0 0 3 0x14200 bored crypto 43630 138858 0 0 3 0x40014200 acpi0 acpi0 94921 352163 0 0 3 0x14200 bored softnet 16929 380470 0 0 2 0x14200 systqmp 29638 519616 0 0 3 0x14200 bored systq 38594 345289 0 0 3 0x40014200 bored softclock 74506 130714 0 0 3 0x40014200 idle0 1 345984 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 9482 6337K 6723K 78643K 10937 0 pcb 13 8K 8K 78643K 33 0 rtable 100 3K 7K 78643K 338 0 ifaddr 61 12K 13K 78643K 124 0 counters 21 16K 16K 78643K 27 0 ioctlops 0 0K 4K 78643K 49 0 iov 0 0K 16K 78643K 32 0 mount 1 1K 1K 78643K 1 0 vnodes 1219 77K 77K 78643K 1333 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 0K 78643K 66 0 dirhash 12 2K 2K 78643K 12 0 ACPI 1809 195K 288K 78643K 12938 0 file desc 4 9K 25K 78643K 251 0 sigio 0 0K 0K 78643K 2 0 proc 48 38K 54K 78643K 377 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 6 0 in_multi 36 2K 2K 78643K 51 0 ether_multi 1 0K 0K 78643K 3 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 184 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 126 23K 39K 78643K 1412 0 UVM aobj 15 2K 2K 78643K 16 0 memdesc 1 4K 4K 78643K 1 0 crypto data 1 1K 1K 78643K 1 0 ip6_options 0 0K 0K 78643K 8 0 NDP 10 0K 0K 78643K 20 0 temp 98 3856K 3920K 78643K 4738 0 kqueue 3 4K 9K 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 88 27 0 25 1 0 1 1 0 8 0 rtentry 112 47 0 7 2 0 2 2 0 8 0 unpcb 120 363 0 355 1 0 1 1 0 8 0 syncache 272 6 0 6 2 2 0 1 0 8 0 tcpqe 32 118 0 118 1 1 0 1 0 8 0 tcpcb 592 212 0 190 3 0 3 3 0 8 1 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 2 0 1 1 0 1 1 0 8 0 inpcb 296 334 0 327 2 0 2 2 0 8 1 nd6 48 8 0 2 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 1 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1136 1 0 1 1 0 1 1 0 8 1 pfstscr 40 8 0 6 1 0 1 1 0 8 0 pfrktable 1344 44 0 44 2 1 1 1 0 8 1 pftag 88 14 0 14 2 1 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 112 8 0 6 1 0 1 1 0 8 0 pfstate 328 4 0 3 1 0 1 1 0 8 0 pfrule 1360 8 0 8 2 1 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 188 0 0 12 0 12 12 0 8 0 art_table 32 189 0 0 2 0 2 2 0 8 0 art_node 16 46 0 6 1 0 1 1 0 8 0 sysvmsgpl 40 12 0 9 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 62 0 52 1 0 1 1 0 8 0 shmpl 112 13 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1725 0 330 88 0 88 88 0 8 0 ffsino 240 1725 0 330 83 0 83 83 0 8 0 nchpl 144 2312 0 712 60 0 60 60 0 8 0 uvmvnodes 72 1857 0 0 34 0 34 34 0 8 0 vnodes 208 1857 0 0 98 0 98 98 0 8 0 namei 1024 5936 0 5936 1 0 1 1 0 8 1 pfiaddrpl 120 12 0 12 2 1 1 1 0 8 1 scxspl 200 6645 0 6645 1 0 1 1 0 8 1 plimitpl 152 33 0 26 1 0 1 1 0 8 0 sigapl 424 438 0 410 4 0 4 4 0 8 0 futexpl 56 4439 0 4439 1 0 1 1 0 8 1 knotepl 112 90 0 72 1 0 1 1 0 8 0 kqueuepl 152 30 0 27 1 0 1 1 0 8 0 pipepl 272 106 0 96 2 1 1 2 0 8 0 fdescpl 432 423 0 410 2 0 2 2 0 8 0 filepl 120 2547 0 2461 4 0 4 4 0 8 1 lockfpl 104 56 0 55 1 0 1 1 0 8 0 lockfspl 48 22 0 21 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 96 173 0 166 1 0 1 1 0 8 0 zombiepl 144 411 0 410 1 0 1 1 0 8 0 processpl 944 438 0 410 4 0 4 4 0 8 0 procpl 632 708 0 673 4 0 4 4 0 8 0 sockpl 400 726 0 709 4 1 3 4 0 8 1 mcl64k 65536 15 0 15 1 0 1 1 0 8 1 mcl16k 16384 2 0 2 1 0 1 1 0 8 1 mcl12k 12288 10 0 10 1 0 1 1 0 8 1 mcl9k 9216 5 0 5 1 0 1 1 0 8 1 mcl8k 8192 5 0 5 1 0 1 1 0 8 1 mcl4k 4096 23 0 23 2 2 0 1 0 8 0 mcl2k2 2112 1 0 1 1 1 0 1 0 8 0 mcl2k 2048 93153 0 93109 15 8 7 14 0 8 0 mtagpl 96 29 0 24 2 1 1 1 0 8 0 mbufpl 256 148668 0 148591 12 3 9 9 0 8 0 bufpl 280 3656 0 118 253 0 253 253 0 8 0 anonpl 16 56912 0 39696 76 5 71 73 0 107 1 amapchunkpl 152 2424 0 2249 21 1 20 21 0 158 11 amappl16 192 1885 0 976 47 0 47 47 0 8 1 amappl15 184 107 0 104 1 0 1 1 0 8 0 amappl14 176 10 0 7 1 0 1 1 0 8 0 amappl13 168 27 0 24 1 0 1 1 0 8 0 amappl12 160 19 0 17 1 0 1 1 0 8 0 amappl11 152 45 0 35 1 0 1 1 0 8 0 amappl10 144 125 0 118 1 0 1 1 0 8 0 amappl9 136 467 0 465 1 0 1 1 0 8 0 amappl8 128 407 0 375 2 0 2 2 0 8 0 amappl7 120 103 0 91 1 0 1 1 0 8 0 amappl6 112 25 0 22 1 0 1 1 0 8 0 amappl5 104 364 0 353 1 0 1 1 0 8 0 amappl4 96 426 0 398 1 0 1 1 0 8 0 amappl3 88 130 0 121 1 0 1 1 0 8 0 amappl2 80 2668 0 2610 2 0 2 2 0 8 0 amappl1 72 18128 0 17735 22 13 9 17 0 8 0 amappl 80 942 0 892 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 15 0 1 1 0 1 1 0 8 0 uaddrrnd 24 423 0 410 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 423 0 410 1 0 1 1 0 8 0 vmmpekpl 168 6609 0 6585 2 0 2 2 0 8 0 vmmpepl 168 58337 0 56442 119 19 100 112 0 357 10 vmsppl 272 422 0 410 2 1 1 2 0 8 0 pdppl 4096 852 0 820 6 1 5 6 0 8 0 pvpl 32 176784 0 156654 178 6 172 175 0 265 7 pmappl 200 422 0 410 1 0 1 1 0 8 0 extentpl 40 53 0 36 1 0 1 1 0 8 0 phpool 112 240 0 22 7 0 7 7 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(ffff800000af2d00) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac7800) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac7800) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac7800) 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(ffff80001d7a5140) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd8066532820,7,fffffd806c3bfba0,ffff8000ffff9b30) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80572dbbc8,ffff8000ffff9b30) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80572dbbc8,ffff8000ffff9b30) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80572dbbc8,ffff8000ffff9b30) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80572dbbc8,ffff8000ffff9b30) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000ffff9b30) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff8000ffff9b30,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff8000ffff9b30,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff8000ffff9b30,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff8000ffff9b30) at userret+0x159 sys/kern/kern_sig.c:1872 syscall(ffff80001d7a55c0) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001d7a55c0) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffce380, count: -17 ddb> machine ddbcpu 1 No such command ddb> trace in_delmulti(e3) at in_delmulti+0x8d sys/netinet/in.c:914 in_purgeaddr(ffff800000af2d00) at in_purgeaddr+0x156 sys/netinet/in.c:760 in_ifdetach(ffff800000ac7800) at in_ifdetach+0x74 sys/netinet/in.c:971 if_detach(ffff800000ac7800) at if_detach+0x140 sys/net/if.c:1039 tun_clone_destroy(ffff800000ac7800) 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(ffff80001d7a5140) at spec_close+0x311 sys/kern/spec_vnops.c:560 VOP_CLOSE(fffffd8066532820,7,fffffd806c3bfba0,ffff8000ffff9b30) at VOP_CLOSE+0xc0 sys/kern/vfs_vops.c:174 vn_closefile(fffffd80572dbbc8,ffff8000ffff9b30) at vn_closefile+0xd2 vn_close sys/kern/vfs_vnops.c:298 [inline] vn_closefile(fffffd80572dbbc8,ffff8000ffff9b30) at vn_closefile+0xd2 sys/kern/vfs_vnops.c:614 fdrop(fffffd80572dbbc8,ffff8000ffff9b30) at fdrop+0xc2 sys/kern/kern_descrip.c:1279 closef(fffffd80572dbbc8,ffff8000ffff9b30) at closef+0x117 sys/kern/kern_descrip.c:1263 fdfree(ffff8000ffff9b30) at fdfree+0x100 sys/kern/kern_descrip.c:1195 exit1(ffff8000ffff9b30,0,19,1) at exit1+0x32c sys/kern/kern_exit.c:197 postsig(ffff8000ffff9b30,19) at postsig+0x4b2 sigexit sys/kern/kern_sig.c:1483 [inline] postsig(ffff8000ffff9b30,19) at postsig+0x4b2 sys/kern/kern_sig.c:1415 userret(ffff8000ffff9b30) at userret+0x159 sys/kern/kern_sig.c:1872 syscall(ffff80001d7a55c0) at syscall+0x42e mi_syscall_return sys/sys/syscall_mi.h:129 [inline] syscall(ffff80001d7a55c0) at syscall+0x42e sys/arch/amd64/amd64/trap.c:592 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x7f7ffffce380, count: -17