uvm_fault(0xffffffff839add90, 0xffff80000162f000, 0, 1) -> e kernel: page fault trap, code=0 Stopped at memcpy+0x19: repe movsq (%rsi),%es:(%rdi) TID PID UID PRFLAGS PFLAGS CPU COMMAND *227914 69041 0 0 0x4000000 0 syz-executor memcpy() at memcpy+0x19 rtm_msg1(14,ffff80002ccfb2c8) at rtm_msg1+0x306 sys/net/rtsock.c:1627 rtm_addr(14,ffff80000162ef00) at rtm_addr+0xb9 sys/net/rtsock.c:-1 in6_update_ifa(ffff800000b3f000,ffff80002ccfb6e0,ffff80000162ef00) at in6_update_ifa+0x19aa sys/netinet6/in6.c:741 in6_ioctl_change_ifaddr(8080691a,ffff80002ccfb6e0,ffff800000b3f000) at in6_ioctl_change_ifaddr+0x638 sys/netinet6/in6.c:352 ifioctl(ffff8000014eb3a8,8080691a,ffff80002ccfb6e0,ffff80003c94aa80) at ifioctl+0x1682 pru_control sys/sys/protosw.h:353 [inline] ifioctl(ffff8000014eb3a8,8080691a,ffff80002ccfb6e0,ffff80003c94aa80) at ifioctl+0x1682 sys/net/if.c:2481 sys_ioctl(ffff80003c94aa80,ffff80002ccfb8b0,ffff80002ccfb800) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80002ccfb8b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccfb8b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2bf5ff144a0, count: 6 https://www.openbsd.org/ddb.html describes the minimum info required in bug reports. Insufficient info makes it difficult to find and fix bugs. ddb> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: uvm_fault(0xffffffff839add90, 0xffff80000162f000, 0, 1) -> e ddb> trace memcpy() at memcpy+0x19 rtm_msg1(14,ffff80002ccfb2c8) at rtm_msg1+0x306 sys/net/rtsock.c:1627 rtm_addr(14,ffff80000162ef00) at rtm_addr+0xb9 sys/net/rtsock.c:-1 in6_update_ifa(ffff800000b3f000,ffff80002ccfb6e0,ffff80000162ef00) at in6_update_ifa+0x19aa sys/netinet6/in6.c:741 in6_ioctl_change_ifaddr(8080691a,ffff80002ccfb6e0,ffff800000b3f000) at in6_ioctl_change_ifaddr+0x638 sys/netinet6/in6.c:352 ifioctl(ffff8000014eb3a8,8080691a,ffff80002ccfb6e0,ffff80003c94aa80) at ifioctl+0x1682 pru_control sys/sys/protosw.h:353 [inline] ifioctl(ffff8000014eb3a8,8080691a,ffff80002ccfb6e0,ffff80003c94aa80) at ifioctl+0x1682 sys/net/if.c:2481 sys_ioctl(ffff80003c94aa80,ffff80002ccfb8b0,ffff80002ccfb800) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80002ccfb8b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccfb8b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2bf5ff144a0, count: -9 ddb> show registers rdi 0xfffffd8073dc6138 rsi 0xffff80000162f000 rbp 0xffff80002ccfb240 rbx 0 rdx 0xea rcx 0xe rax 0x7d8072797138 r8 0x2 r9 0x8080808080808080 r10 0xadab5af55a75bfb2 r11 0xfffffd8073dc60c0 r12 0xea r13 0xea r14 0xc0 r15 0xfffffd806d91b300 rip 0xffffffff81ed4c59 memcpy+0x19 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80002ccfb198 ss 0x10 memcpy+0x19: repe movsq (%rsi),%es:(%rdi) ddb> show proc PROC (syz-executor) tid=227914 pid=69041 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=83, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c94a2b8,0xffffffff83998a70 process=0xffff8000ffffad18 user=0xffff80002ccf6000, vmspace=0xfffffd807441acf8 estcpu=33, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 69041 270807 92134 0 2 0 syz-executor *69041 227914 92134 0 7 0x4000000 syz-executor 90999 83652 90339 0 2 0 syz-executor 90999 205460 90339 0 3 0x4000080 semwait syz-executor 90999 445596 90339 0 2 0x4000000 syz-executor 56452 514147 1 0 4 0x82000 syz-executor 56452 49 1 0 2 0x4082000 syz-executor 56452 296174 1 0 3 0x4002000 suspend syz-executor 67148 98703 1 0 3 0x80 nanoslp init 22642 262325 38290 0 3 0x82 piperd syz-executor 89076 345048 38290 0 3 0x82 piperd syz-executor 52269 345252 46516 0 3 0x82 sbwait sshd-session 68294 257245 38290 0 2 0x2 syz-executor 67610 406992 0 0 3 0x14280 nfsidl nfsio 40759 471085 0 0 3 0x14280 nfsidl nfsio 15797 226536 0 0 3 0x14280 nfsidl nfsio 15676 139176 0 0 3 0x14280 nfsidl nfsio 92134 523628 38290 0 2 0xc82 syz-executor 90339 416019 38290 0 2 0xc82 syz-executor 34777 219992 38290 0 3 0x82 piperd syz-executor 58236 403375 38290 0 3 0x82 piperd syz-executor 38290 172795 58603 0 3 0x82 nanoslp syz-executor 58603 483449 88749 0 3 0x10008a sigsusp ksh 88749 296354 59088 0 3 0x98 kqread sshd-session 59088 241474 46516 0 3 0x92 kqread sshd-session 46516 438976 1 0 3 0x88 kqread sshd 60053 204713 20515 73 3 0x1100090 kqread syslogd 20515 358743 1 0 3 0x100082 sbwait syslogd 964 204808 1 0 3 0x100080 kqread resolvd 16471 224179 81123 77 2 0x100092 dhcpleased 11461 323986 81123 77 3 0x100092 kqread dhcpleased 81123 220412 1 0 3 0x80 kqread dhcpleased 73327 251339 0 0 3 0x14200 bored smr 10813 159356 0 0 2 0x14200 zerothread 55708 441336 0 0 3 0x14200 aiodoned aiodoned 62442 41931 0 0 3 0x14200 syncer update 82179 377113 0 0 3 0x14200 cleaner cleaner 19101 440969 0 0 3 0x14200 reaper reaper 54032 158634 0 0 3 0x14200 pgdaemon pagedaemon 18919 149155 0 0 3 0x14200 bored viomb 10724 220215 0 0 3 0x40014200 acpi0 acpi0 27261 36044 0 0 3 0x14200 bored softnet0 35394 15707 0 0 3 0x14200 bored systqmp 60563 223835 0 0 3 0x14200 bored systq 86481 494335 0 0 3 0x40014200 tmoslp softclock 28320 430857 0 0 3 0x40014200 idle0 1 455875 0 0 3 0x80082 wait init 0 0 -1 0 3 0x10010200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10171 11050K 12464K 166960K 14258 0 pcb 20 15K 16K 166960K 350 0 rtable 174 8K 8K 166960K 737 0 pf 26 12K 19K 166960K 162 0 ifaddr 31 5K 8K 166960K 124 0 ifgroup 38 1K 2K 166960K 191 0 sysctl 4 1K 9K 166960K 17 0 counters 29 17K 18K 166960K 230 0 ioctlops 0 0K 4K 166960K 617 0 iov 0 0K 16K 166960K 139 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1526 96K 96K 166960K 3021 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 33 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 0K 166960K 102 0 dirhash 12 2K 2K 166960K 39 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 12 41K 240K 166960K 1546 0 sigio 0 0K 0K 166960K 28 0 proc 52 50K 124K 166960K 751 0 subproc 72 4K 5K 166960K 198 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 167 0 in_multi 65 4K 7K 166960K 201 0 ether_multi 1 0K 0K 166960K 11 0 mrt 1 0K 0K 166960K 11 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 103 466K 466K 166960K 103 0 exec 0 0K 1K 166960K 617 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 196 147K 164K 166960K 14485 0 UVM aobj 35 10K 10K 166960K 45 0 pinsyscall 34 68K 96K 166960K 2737 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 65 0 NDP 8 0K 2K 166960K 85 0 temp 77 8668K 8924K 166960K 59997 0 kqueue 13 20K 33K 166960K 276 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 171 0 168 2 0 2 2 0 8 1 rtentry 136 212 0 146 5 0 5 5 0 8 0 unpcb 144 988 0 969 6 0 6 6 0 8 5 syncache 336 5 0 5 1 0 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 654 0 647 7 0 7 7 0 8 6 arp 96 34 0 24 1 0 1 1 0 8 0 ipq 40 1 0 1 1 0 1 1 0 8 1 ipqe 40 1 0 1 1 0 1 1 0 8 1 inpcb 328 1533 0 1520 10 0 10 10 0 8 8 ip6q 72 3 0 1 1 0 1 1 0 8 0 ip6af 40 4 0 2 1 0 1 1 0 8 0 nd6 112 46 0 28 1 0 1 1 0 8 0 pkpcb 40 15 0 15 1 0 1 1 0 8 1 kcovpl 48 22 0 14 1 0 1 1 0 8 0 mppekey 1024 1 0 1 1 0 1 1 0 8 1 ppxss 1072 182 0 182 1 0 1 1 0 8 1 pppxif 1384 6 0 6 1 0 1 1 0 8 1 pfstscr 40 5 0 4 1 0 1 1 0 8 0 pfrktable 1344 4 0 4 1 0 1 1 0 8 1 pfanchor 1288 3 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 0 1 1 0 8 1 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 6 0 4 1 0 1 1 0 8 0 pfstate 384 3 0 2 1 0 1 1 0 8 0 pfrule 1344 6 0 6 1 0 1 1 0 8 1 rttmr 136 3 0 3 1 0 1 1 0 8 1 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 881 0 598 30 0 30 30 0 8 7 art_table 40 884 0 598 5 0 5 5 0 8 0 art_node 32 207 0 149 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 0 1 0 1 1 0 8 0 semupl 112 1 0 1 1 0 1 1 0 8 1 semapl 112 100 0 90 1 0 1 1 0 8 0 shmpl 112 38 0 10 1 0 1 1 0 8 0 dirhash 1024 35 0 18 3 0 3 3 0 8 0 dino2pl 256 4071 0 2564 95 0 95 95 0 8 0 ffsino 256 4071 0 2564 95 0 95 95 0 8 0 nchpl 144 6116 0 4415 64 0 64 64 0 8 0 rtmask 32 11 0 11 1 0 1 1 0 8 1 vnodes 216 5280 0 0 294 0 294 294 0 8 0 namei 1024 21577 0 21576 2 0 2 2 0 8 1 vcpupl 3904 4 0 0 1 0 1 1 0 8 0 vmpool 800 4 0 0 1 0 1 1 0 8 0 kstatmem 264 118 0 102 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 5 0 5 1 0 1 1 0 8 1 scxspl 216 19614 0 19614 8 0 8 8 1 8 8 plimitpl 152 463 0 448 1 0 1 1 0 8 0 sigapl 424 1806 0 1764 8 0 8 8 0 8 1 knotepl 120 50001 0 49953 16 5 11 16 0 8 8 kqueuepl 184 667 0 658 4 0 4 4 0 8 3 pipepl 304 391 0 363 8 0 8 8 0 8 5 fdescpl 448 1770 0 1745 5 0 5 5 0 8 1 filepl 120 11953 0 11736 15 0 15 15 0 8 6 lockfpl 104 628 0 626 1 0 1 1 0 8 0 lockfspl 48 288 0 286 1 0 1 1 0 8 0 sessionpl 144 35 0 27 1 0 1 1 0 8 0 pgrppl 48 105 0 89 1 0 1 1 0 8 0 ucredpl 104 1540 0 1529 1 0 1 1 0 8 0 zombiepl 144 1764 0 1764 1 0 1 1 0 8 1 processpl 1152 1806 0 1764 5 0 5 5 0 8 0 procpl 664 3711 0 3664 7 0 7 7 0 8 1 sosppl 176 5 0 5 1 0 1 1 0 8 1 sockpl 552 2865 0 2830 14 2 12 13 0 8 8 mcl64k 65536 279 0 279 3 0 3 3 0 8 3 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 16 0 15 1 0 1 1 0 8 0 mcl4k 4096 4210 0 4147 14 0 14 14 0 8 5 mcl2k 2048 2201 0 2196 3 0 3 3 0 8 2 mtagpl 96 124 0 28 3 0 3 3 0 8 0 mbufpl 256 19481 0 19228 22 0 22 22 0 8 3 bufpl 280 7385 0 1163 445 0 445 445 0 8 0 anonpl 24 277518 0 274523 100 0 100 100 0 187 67 amapchunkpl 152 49597 0 49242 38 0 38 38 0 158 16 amappl16 200 5211 0 5180 48 36 12 39 0 8 8 amappl15 192 3 0 3 1 0 1 1 0 8 1 amappl14 184 22 0 22 1 0 1 1 0 8 1 amappl13 176 467 0 466 1 0 1 1 0 8 0 amappl12 168 2153 0 2120 2 0 2 2 0 8 0 amappl11 160 37 0 37 1 0 1 1 0 8 1 amappl10 152 73 0 62 1 0 1 1 0 8 0 amappl9 144 303 0 302 1 0 1 1 0 8 0 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 112 0 111 1 0 1 1 0 8 0 amappl6 120 338 0 325 1 0 1 1 0 8 0 amappl5 112 71 0 62 1 0 1 1 0 8 0 amappl4 104 427 0 404 1 0 1 1 0 8 0 amappl3 96 8705 0 8642 3 0 3 3 0 8 0 amappl2 88 1881 0 1810 2 0 2 2 0 8 0 amappl1 80 15264 0 14687 15 0 15 15 0 8 0 amappl 88 13461 0 13336 5 0 5 5 0 92 0 uvmvnodes 80 136 0 0 3 0 3 3 0 8 0 dma32768 32768 1 0 1 1 0 1 1 0 8 1 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 7 0 7 1 0 1 1 0 8 1 dma128 128 255 0 255 1 0 1 1 0 8 1 dma64 64 7 0 7 1 0 1 1 0 8 1 dma32 32 7 0 7 1 0 1 1 0 8 1 dma16 16 20 0 19 1 0 1 1 0 8 0 aobjpl 72 44 0 10 1 0 1 1 0 8 0 uaddrrnd 24 1770 0 1745 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1770 0 1745 1 0 1 1 0 8 0 vmmpekpl 168 14765 0 14729 2 0 2 2 0 8 0 vmmpepl 168 116159 0 114532 111 0 111 111 0 357 22 vmsppl 368 1769 0 1745 4 0 4 4 0 8 1 rwobjpl 40 30822 0 29792 17 0 17 17 0 8 3 pdppl 4096 3555 0 3494 122 51 71 83 0 8 10 pvpl 32 780043 0 772107 204 0 204 204 0 265 110 pmappl 216 1773 0 1745 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 416 0 51 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace memcpy() at memcpy+0x19 rtm_msg1(14,ffff80002ccfb2c8) at rtm_msg1+0x306 sys/net/rtsock.c:1627 rtm_addr(14,ffff80000162ef00) at rtm_addr+0xb9 sys/net/rtsock.c:-1 in6_update_ifa(ffff800000b3f000,ffff80002ccfb6e0,ffff80000162ef00) at in6_update_ifa+0x19aa sys/netinet6/in6.c:741 in6_ioctl_change_ifaddr(8080691a,ffff80002ccfb6e0,ffff800000b3f000) at in6_ioctl_change_ifaddr+0x638 sys/netinet6/in6.c:352 ifioctl(ffff8000014eb3a8,8080691a,ffff80002ccfb6e0,ffff80003c94aa80) at ifioctl+0x1682 pru_control sys/sys/protosw.h:353 [inline] ifioctl(ffff8000014eb3a8,8080691a,ffff80002ccfb6e0,ffff80003c94aa80) at ifioctl+0x1682 sys/net/if.c:2481 sys_ioctl(ffff80003c94aa80,ffff80002ccfb8b0,ffff80002ccfb800) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80002ccfb8b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccfb8b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2bf5ff144a0, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace memcpy() at memcpy+0x19 rtm_msg1(14,ffff80002ccfb2c8) at rtm_msg1+0x306 sys/net/rtsock.c:1627 rtm_addr(14,ffff80000162ef00) at rtm_addr+0xb9 sys/net/rtsock.c:-1 in6_update_ifa(ffff800000b3f000,ffff80002ccfb6e0,ffff80000162ef00) at in6_update_ifa+0x19aa sys/netinet6/in6.c:741 in6_ioctl_change_ifaddr(8080691a,ffff80002ccfb6e0,ffff800000b3f000) at in6_ioctl_change_ifaddr+0x638 sys/netinet6/in6.c:352 ifioctl(ffff8000014eb3a8,8080691a,ffff80002ccfb6e0,ffff80003c94aa80) at ifioctl+0x1682 pru_control sys/sys/protosw.h:353 [inline] ifioctl(ffff8000014eb3a8,8080691a,ffff80002ccfb6e0,ffff80003c94aa80) at ifioctl+0x1682 sys/net/if.c:2481 sys_ioctl(ffff80003c94aa80,ffff80002ccfb8b0,ffff80002ccfb800) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80002ccfb8b0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002ccfb8b0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x2bf5ff144a0, count: -9