uvm_fault(0xffffffff839300e0, 0xffff8000015eb000, 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 *208546 8590 0 0 0x4000000 0 syz-executor memcpy() at memcpy+0x19 rtm_msg1(14,ffff80003c958a68) at rtm_msg1+0x306 sys/net/rtsock.c:1627 rtm_addr(14,ffff8000015eaf00) at rtm_addr+0xb9 sys/net/rtsock.c:-1 in6_update_ifa(ffff800000c47000,ffff80003c958e80,ffff8000015eaf00) at in6_update_ifa+0x19aa sys/netinet6/in6.c:741 in6_ioctl_change_ifaddr(8080691a,ffff80003c958e80,ffff800000c47000) at in6_ioctl_change_ifaddr+0x638 sys/netinet6/in6.c:352 ifioctl(ffff800010fe17b8,8080691a,ffff80003c958e80,ffff80003a52bcb0) at ifioctl+0x16c4 pru_control sys/sys/protosw.h:353 [inline] ifioctl(ffff800010fe17b8,8080691a,ffff80003c958e80,ffff80003a52bcb0) at ifioctl+0x16c4 sys/net/if.c:2553 sys_ioctl(ffff80003a52bcb0,ffff80003c959050,ffff80003c958fa0) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80003c959050) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c959050) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd8321417a40, 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(0xffffffff839300e0, 0xffff8000015eb000, 0, 1) -> e ddb> trace memcpy() at memcpy+0x19 rtm_msg1(14,ffff80003c958a68) at rtm_msg1+0x306 sys/net/rtsock.c:1627 rtm_addr(14,ffff8000015eaf00) at rtm_addr+0xb9 sys/net/rtsock.c:-1 in6_update_ifa(ffff800000c47000,ffff80003c958e80,ffff8000015eaf00) at in6_update_ifa+0x19aa sys/netinet6/in6.c:741 in6_ioctl_change_ifaddr(8080691a,ffff80003c958e80,ffff800000c47000) at in6_ioctl_change_ifaddr+0x638 sys/netinet6/in6.c:352 ifioctl(ffff800010fe17b8,8080691a,ffff80003c958e80,ffff80003a52bcb0) at ifioctl+0x16c4 pru_control sys/sys/protosw.h:353 [inline] ifioctl(ffff800010fe17b8,8080691a,ffff80003c958e80,ffff80003a52bcb0) at ifioctl+0x16c4 sys/net/if.c:2553 sys_ioctl(ffff80003a52bcb0,ffff80003c959050,ffff80003c958fa0) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80003c959050) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c959050) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd8321417a40, count: -9 ddb> show registers rdi 0xfffffd806f2a8938 rsi 0xffff8000015eb000 rbp 0xffff80003c9589e0 rbx 0 rdx 0xea rcx 0xe rax 0x7d806dcbd938 r8 0x2 r9 0x8080808080808080 r10 0x78038fb3941a503d r11 0xfffffd806f2a88c0 r12 0xea r13 0xea r14 0xc0 r15 0xfffffd807e9c7300 rip 0xffffffff8277faa9 memcpy+0x19 cs 0x8 rflags 0x10206 __ALIGN_SIZE+0xf206 rsp 0xffff80003c958938 ss 0x10 memcpy+0x19: repe movsq (%rsi),%es:(%rdi) ddb> show proc PROC (syz-executor) tid=208546 pid=8590 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=50, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003a529a20,0xffff80003a52a568 process=0xffff8000ffffad18 user=0xffff80003c954000, vmspace=0xfffffd806c9be010 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 38279 390187 8217 0 3 0x80 nanoslp syz-executor 38279 62396 8217 0 3 0x4000080 fsleep syz-executor 38279 188076 8217 0 3 0x4000080 fsleep syz-executor 38279 372063 8217 0 3 0x4000080 fsleep syz-executor 8590 74128 64209 0 2 0 syz-executor * 8590 208546 64209 0 7 0x4000000 syz-executor 8590 326608 64209 0 3 0x4000080 fsleep syz-executor 77078 34392 87703 0 3 0x80 nanoslp syz-executor 77078 359526 87703 0 3 0x4000080 kqread syz-executor 77078 396318 87703 0 3 0x4000080 fsleep syz-executor 25036 384415 74738 0 4 0x82000 syz-executor 25036 29797 74738 0 2 0x4082000 syz-executor 25036 260717 74738 0 3 0x4082000 inode syz-executor 25036 233258 74738 0 3 0x4002000 suspend syz-executor 25036 220814 74738 0 4 0x4082000 syz-executor 46724 202505 22723 0 2 0xc82 syz-executor 74738 138695 22723 0 3 0x82 wait syz-executor 8217 257618 22723 0 3 0x82 nanoslp syz-executor 87703 107301 22723 0 2 0xc82 syz-executor 53233 256803 22723 0 2 0x2 syz-executor 97551 32601 22723 0 2 0x2 syz-executor 75152 396864 22723 0 3 0x82 wait syz-executor 64209 10339 22723 0 2 0xc82 syz-executor 22723 12645 70881 0 3 0x82 kqread syz-executor 70881 189000 14398 0 3 0x10008a sigsusp ksh 14398 165093 43475 0 3 0x98 kqread sshd-session 43475 305332 95584 0 3 0x92 kqread sshd-session 79944 256483 1 0 3 0x100083 ttyin getty 95584 476808 1 0 3 0x88 kqread sshd 22249 46354 71986 73 3 0x1100090 kqread syslogd 71986 487203 1 0 3 0x100082 sbwait syslogd 58277 302892 1 0 3 0x100080 kqread resolvd 27834 130297 17098 77 2 0x100092 dhcpleased 50347 5001 17098 77 3 0x100092 kqread dhcpleased 17098 350418 1 0 3 0x80 kqread dhcpleased 39820 360978 0 0 3 0x14200 bored smr 3104 515450 0 0 2 0x14200 zerothread 90182 135983 0 0 3 0x14200 aiodoned aiodoned 69415 278339 0 0 3 0x14200 syncer update 31289 313431 0 0 3 0x14200 cleaner cleaner 16070 488615 0 0 3 0x14200 reaper reaper 40256 18879 0 0 3 0x14200 pgdaemon pagedaemon 90773 428946 0 0 3 0x14200 bored viomb 76669 408018 0 0 3 0x40014200 acpi0 acpi0 44193 466074 0 0 3 0x14200 bored softnet0 88494 183390 0 0 3 0x14200 smrbar systqmp 22846 365317 0 0 3 0x14200 bored systq 35328 379342 0 0 3 0x40014200 tmoslp softclock 95673 240975 0 0 3 0x40014200 idle0 1 389450 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 11043 12232K 12362K 166960K 12259 0 pcb 18 12K 12K 166960K 33 0 rtable 237 8K 9K 166960K 390 0 pf 31 13K 17K 166960K 43 0 ifaddr 42 7K 7K 166960K 49 0 ifgroup 50 2K 2K 166960K 58 0 sysctl 1 1K 9K 166960K 6 0 counters 33 17K 18K 166960K 39 0 ioctlops 0 0K 4K 166960K 73 0 iov 0 0K 12K 166960K 8 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1341 84K 85K 166960K 1430 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 7 0 VM map 2 1K 1K 166960K 2 0 sem 3 0K 0K 166960K 3 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 16 57K 93K 166960K 233 0 proc 63 67K 108K 166960K 490 0 subproc 72 4K 4K 166960K 72 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 5 0 in_multi 99 7K 7K 166960K 102 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 79 360K 360K 166960K 79 0 exec 0 0K 1K 166960K 372 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 231 159K 167K 166960K 3972 0 UVM aobj 8 2K 2K 166960K 9 0 pinsyscall 37 74K 94K 166960K 1311 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 8 0 NDP 11 0K 2K 166960K 31 0 temp 36 8658K 8722K 166960K 4217 0 kqueue 14 22K 26K 166960K 44 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 48 0 45 1 0 1 1 0 8 0 rtentry 136 114 0 12 4 0 4 4 0 8 0 unpcb 144 77 0 61 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 736 29 0 25 1 0 1 1 0 8 0 arp 96 18 0 0 1 0 1 1 0 8 0 inpcb 328 118 0 110 3 1 2 2 0 8 1 nd6 112 25 0 0 1 0 1 1 0 8 0 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 6 0 6 1 0 1 1 0 8 1 pfstscr 40 1 0 0 1 0 1 1 0 8 0 pfstitem 24 2 0 0 1 0 1 1 0 8 0 pfstkey 128 2 0 0 1 0 1 1 0 8 0 pfstate 384 1 0 0 1 0 1 1 0 8 0 pfrule 1344 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 490 0 6 31 0 31 31 0 8 0 art_table 40 491 0 6 5 0 5 5 0 8 0 art_node 32 114 0 12 1 0 1 1 0 8 0 semapl 112 1 0 0 1 0 1 1 0 8 0 shmpl 112 6 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1726 0 221 95 0 95 95 0 8 0 ffsino 256 1726 0 221 95 0 95 95 0 8 0 nchpl 144 2058 0 367 63 0 63 63 0 8 0 rtmask 32 2 0 2 1 0 1 1 0 8 1 vnodes 216 1850 0 0 103 0 103 103 0 8 0 namei 1024 6054 0 6053 4 2 2 2 0 8 1 kstatmem 264 30 0 8 2 0 2 2 0 8 0 scxspl 216 9474 0 9474 9 1 8 8 1 8 8 plimitpl 152 179 0 161 1 0 1 1 0 8 0 sigapl 424 522 0 481 6 1 5 6 0 8 0 knotepl 120 6338 0 6283 10 1 9 9 0 8 7 kqueuepl 184 56 0 46 1 0 1 1 0 8 0 pipepl 304 119 0 92 3 0 3 3 0 8 0 fdescpl 448 509 0 481 5 1 4 5 0 8 0 filepl 120 1974 0 1761 10 2 8 9 0 8 0 lockfpl 104 29 0 27 1 0 1 1 0 8 0 lockfspl 48 14 0 12 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 29 0 13 1 0 1 1 0 8 0 ucredpl 104 214 0 203 1 0 1 1 0 8 0 zombiepl 144 528 0 526 2 1 1 1 0 8 0 processpl 1152 522 0 481 4 0 4 4 0 8 0 procpl 664 700 0 648 7 1 6 6 0 8 0 sosppl 176 2 0 2 1 0 1 1 0 8 1 sockpl 552 250 0 223 3 0 3 3 0 8 1 mcl64k 65536 3 0 3 2 1 1 1 0 8 1 mcl16k 16384 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 5 0 5 2 1 1 1 0 8 1 mcl4k 4096 2591 0 2540 13 5 8 12 0 8 1 mcl2k 2048 407 0 403 1 0 1 1 0 8 0 mtagpl 96 11 0 4 1 0 1 1 0 8 0 mbufpl 256 5021 0 4849 12 0 12 12 0 8 0 bufpl 280 4422 0 119 308 0 308 308 0 8 0 anonpl 24 117663 0 110722 54 2 52 52 0 187 9 amapchunkpl 152 11324 0 10830 23 1 22 22 0 158 0 amappl16 200 2645 0 2394 22 3 19 19 0 8 5 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 12 0 10 1 0 1 1 0 8 0 amappl13 176 412 0 411 1 0 1 1 0 8 0 amappl12 168 853 0 816 2 0 2 2 0 8 0 amappl11 160 4 0 4 1 1 0 1 0 8 0 amappl10 152 40 0 30 1 0 1 1 0 8 0 amappl9 144 247 0 247 1 1 0 1 0 8 0 amappl8 136 19 0 18 1 0 1 1 0 8 0 amappl7 128 81 0 80 1 0 1 1 0 8 0 amappl6 120 260 0 249 1 0 1 1 0 8 0 amappl5 112 78 0 70 1 0 1 1 0 8 0 amappl4 104 380 0 357 1 0 1 1 0 8 0 amappl3 96 1891 0 1790 3 0 3 3 0 8 0 amappl2 88 510 0 458 2 0 2 2 0 8 0 amappl1 80 9133 0 8602 13 1 12 13 0 8 0 amappl 88 3247 0 3086 5 0 5 5 0 92 0 uvmvnodes 80 97 0 0 2 0 2 2 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 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 72 8 0 1 1 0 1 1 0 8 0 uaddrrnd 24 509 0 481 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 509 0 481 1 0 1 1 0 8 0 vmmpekpl 168 5764 0 5732 2 0 2 2 0 8 0 vmmpepl 168 40672 0 38721 95 1 94 94 0 357 4 vmsppl 368 508 0 481 4 1 3 4 0 8 0 rwobjpl 40 14842 0 13686 13 0 13 13 0 8 0 pdppl 4096 1025 0 962 95 28 67 81 0 8 4 pvpl 32 257185 0 245025 123 0 123 123 0 265 19 pmappl 216 508 0 481 3 0 3 3 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 369 0 42 10 0 10 10 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace memcpy() at memcpy+0x19 rtm_msg1(14,ffff80003c958a68) at rtm_msg1+0x306 sys/net/rtsock.c:1627 rtm_addr(14,ffff8000015eaf00) at rtm_addr+0xb9 sys/net/rtsock.c:-1 in6_update_ifa(ffff800000c47000,ffff80003c958e80,ffff8000015eaf00) at in6_update_ifa+0x19aa sys/netinet6/in6.c:741 in6_ioctl_change_ifaddr(8080691a,ffff80003c958e80,ffff800000c47000) at in6_ioctl_change_ifaddr+0x638 sys/netinet6/in6.c:352 ifioctl(ffff800010fe17b8,8080691a,ffff80003c958e80,ffff80003a52bcb0) at ifioctl+0x16c4 pru_control sys/sys/protosw.h:353 [inline] ifioctl(ffff800010fe17b8,8080691a,ffff80003c958e80,ffff80003a52bcb0) at ifioctl+0x16c4 sys/net/if.c:2553 sys_ioctl(ffff80003a52bcb0,ffff80003c959050,ffff80003c958fa0) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80003c959050) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c959050) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd8321417a40, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace memcpy() at memcpy+0x19 rtm_msg1(14,ffff80003c958a68) at rtm_msg1+0x306 sys/net/rtsock.c:1627 rtm_addr(14,ffff8000015eaf00) at rtm_addr+0xb9 sys/net/rtsock.c:-1 in6_update_ifa(ffff800000c47000,ffff80003c958e80,ffff8000015eaf00) at in6_update_ifa+0x19aa sys/netinet6/in6.c:741 in6_ioctl_change_ifaddr(8080691a,ffff80003c958e80,ffff800000c47000) at in6_ioctl_change_ifaddr+0x638 sys/netinet6/in6.c:352 ifioctl(ffff800010fe17b8,8080691a,ffff80003c958e80,ffff80003a52bcb0) at ifioctl+0x16c4 pru_control sys/sys/protosw.h:353 [inline] ifioctl(ffff800010fe17b8,8080691a,ffff80003c958e80,ffff80003a52bcb0) at ifioctl+0x16c4 sys/net/if.c:2553 sys_ioctl(ffff80003a52bcb0,ffff80003c959050,ffff80003c958fa0) at sys_ioctl+0x660 sys/kern/sys_generic.c:-1 syscall(ffff80003c959050) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c959050) at syscall+0x962 sys/arch/amd64/amd64/trap.c:775 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd8321417a40, count: -9