uvm_fault(0xffffffff839639b8, 0xffff80000161604a, 0, 1) -> e kernel: page fault trap, code=0 Stopped at arp_rtrequest+0x65e: movzwl 0xc(%r15,%rbx,1),%ecx TID PID UID PRFLAGS PFLAGS CPU COMMAND *346423 89752 0 0 0x4000000 0 syz-executor arp_rtrequest(ffff800000039058,1,fffffd806c25e5e8) at arp_rtrequest+0x65e arprequest sys/netinet/if_ether.c:281 [inline] arp_rtrequest(ffff800000039058,1,fffffd806c25e5e8) at arp_rtrequest+0x65e sys/netinet/if_ether.c:184 rtrequest(1,ffff80003c96d638,0,ffff80003c96d5b0,16) at rtrequest+0xd4c sys/net/route.c:1117 rtm_output(ffff800001604400,ffff80003c96d6e0,ffff80003c96d638,0,16) at rtm_output+0x855 sys/net/rtsock.c:973 route_output(fffffd807470d200,ffff8000015b34a0) at route_output+0x9ac sys/net/rtsock.c:878 route_send(ffff8000015b34a0,fffffd807470d200,0,0) at route_send+0xd7 sys/net/rtsock.c:342 sosend(ffff8000015b34a0,0,ffff80003c96d888,0,0,808) at sosend+0x824 sys/kern/uipc_socket.c:-1 sendit(ffff80002a7f2f90,3,ffff80003c96d980,808,ffff80003c96da30) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendto(ffff80002a7f2f90,ffff80003c96dae0,ffff80003c96da30) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557 syscall(ffff80003c96dae0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96dae0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8200cdf5380, count: 5 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(0xffffffff839639b8, 0xffff80000161604a, 0, 1) -> e ddb> trace arp_rtrequest(ffff800000039058,1,fffffd806c25e5e8) at arp_rtrequest+0x65e arprequest sys/netinet/if_ether.c:281 [inline] arp_rtrequest(ffff800000039058,1,fffffd806c25e5e8) at arp_rtrequest+0x65e sys/netinet/if_ether.c:184 rtrequest(1,ffff80003c96d638,0,ffff80003c96d5b0,16) at rtrequest+0xd4c sys/net/route.c:1117 rtm_output(ffff800001604400,ffff80003c96d6e0,ffff80003c96d638,0,16) at rtm_output+0x855 sys/net/rtsock.c:973 route_output(fffffd807470d200,ffff8000015b34a0) at route_output+0x9ac sys/net/rtsock.c:878 route_send(ffff8000015b34a0,fffffd807470d200,0,0) at route_send+0xd7 sys/net/rtsock.c:342 sosend(ffff8000015b34a0,0,ffff80003c96d888,0,0,808) at sosend+0x824 sys/kern/uipc_socket.c:-1 sendit(ffff80002a7f2f90,3,ffff80003c96d980,808,ffff80003c96da30) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendto(ffff80002a7f2f90,ffff80003c96dae0,ffff80003c96da30) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557 syscall(ffff80003c96dae0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96dae0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8200cdf5380, count: -10 ddb> show registers rdi 0x20 rsi 0x90 rbp 0xffff80003c96d480 rbx 0xde rdx 0 rcx 0x100040600080100 rax 0xfffffd80668be9e0 r8 0x1000 __ALIGN_SIZE r9 0 r10 0xc35be20d284ee902 r11 0x35823d9493351cf r12 0x4b r13 0xfffffd80668be900 r14 0xfffffd806c25e5e8 r15 0xffff800001615f60 rip 0xffffffff81a6607e arp_rtrequest+0x65e cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80003c96d400 ss 0x10 arp_rtrequest+0x65e: movzwl 0xc(%r15,%rbx,1),%ecx ddb> show proc PROC (syz-executor) tid=346423 pid=89752 tcnt=2 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=50, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a7f2d00,0xffff80002a7f34c0 process=0xffff8000ffff4db0 user=0xffff80003c968000, vmspace=0xfffffd806c2a7448 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 88256 91059 25431 0 2 0 syz-executor 88256 123179 25431 0 3 0x4000080 fsleep syz-executor 89752 214131 11662 0 2 0 syz-executor *89752 346423 11662 0 7 0x4000000 syz-executor 62166 223717 48263 0 2 0xc80 syz-executor 62166 183706 48263 0 3 0x4000080 fsleep syz-executor 62166 48732 48263 0 3 0x4000080 fsleep syz-executor 84814 434440 66174 -1 2 0xc90 syz-executor 84814 247397 66174 -1 3 0x4000090 sbwait syz-executor 84814 465526 66174 -1 3 0x4000090 fsleep syz-executor 53109 145445 53299 0 2 0xc80 syz-executor 53109 405511 53299 0 3 0x4000080 netcon syz-executor 53109 104058 53299 0 3 0x4000080 fsleep syz-executor 48263 513367 54455 0 3 0x82 nanoslp syz-executor 25406 511049 0 0 3 0x14200 acct acct 66174 383961 54455 0 3 0x82 nanoslp syz-executor 11662 518176 54455 0 3 0x82 nanoslp syz-executor 53299 135736 54455 0 3 0x82 nanoslp syz-executor 70057 95007 1 0 3 0x100083 ttyopn getty 47577 412121 0 0 3 0x14200 bored sosplice 95153 17649 54455 0 3 0x82 nanoslp syz-executor 2248 51616 54455 0 3 0x82 nanoslp syz-executor 25431 206141 54455 0 3 0x82 nanoslp syz-executor 34618 259502 54455 0 2 0x2 syz-executor 54455 48331 81230 0 3 0x82 kqread syz-executor 81230 504994 30556 0 3 0x10008a sigsusp ksh 30556 260990 87518 0 3 0x98 kqread sshd-session 87518 438501 41267 0 3 0x92 kqread sshd-session 41267 320058 1 0 3 0x88 kqread sshd 85228 966 39486 73 3 0x1100090 kqread syslogd 39486 312916 1 0 3 0x100082 sbwait syslogd 84963 34246 1 0 3 0x100080 kqread resolvd 1392 180883 11415 77 3 0x100092 kqread dhcpleased 5389 362694 11415 77 3 0x100092 kqread dhcpleased 11415 433795 1 0 3 0x80 kqread dhcpleased 10484 239114 0 0 3 0x14200 bored smr 65014 153068 0 0 2 0x14200 zerothread 56 124091 0 0 3 0x14200 aiodoned aiodoned 28830 50528 0 0 3 0x14200 syncer update 23686 274953 0 0 3 0x14200 cleaner cleaner 42673 109831 0 0 3 0x14200 reaper reaper 31698 32054 0 0 3 0x14200 pgdaemon pagedaemon 10023 212893 0 0 3 0x14200 bored viomb 34245 137574 0 0 3 0x40014200 acpi0 acpi0 54462 253586 0 0 3 0x14200 bored softnet3 30276 150296 0 0 3 0x14200 bored softnet2 46087 444323 0 0 3 0x14200 bored softnet1 67203 282008 0 0 3 0x14200 bored softnet0 32125 98232 0 0 3 0x14200 bored systqmp 88280 174585 0 0 3 0x14200 bored systq 14379 424843 0 0 2 0x40014200 softclock 5330 59980 0 0 3 0x40014200 idle0 1 202387 0 0 3 0x82 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 10221 11194K 12176K 166960K 14246 0 pcb 18 16K 18K 166960K 358 0 rtable 238 19K 19K 166960K 783 0 pf 37 14K 21K 166960K 187 0 ifaddr 39 7K 8K 166960K 123 0 ifgroup 48 2K 2K 166960K 196 0 sysctl 4 1K 9K 166960K 25 0 counters 33 17K 18K 166960K 90 0 ioctlops 0 0K 4K 166960K 217 0 iov 1 4K 18K 166960K 104 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1470 92K 93K 166960K 3103 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 35 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 131 0 dirhash 12 2K 2K 166960K 42 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 1694 0 sigio 1 0K 0K 166960K 96 0 proc 60 59K 91K 166960K 806 0 subproc 72 4K 4K 166960K 127 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 230 0 in_multi 87 6K 7K 166960K 227 0 ether_multi 1 0K 0K 166960K 18 0 mrt 2 0K 0K 166960K 17 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 253 1129K 1129K 166960K 253 0 exec 0 0K 1K 166960K 836 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 36 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 243 157K 169K 166960K 15952 0 UVM aobj 77 7K 7K 166960K 81 0 pinsyscall 38 76K 93K 166960K 2871 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 100 0 NDP 11 0K 2K 166960K 81 0 temp 79 8688K 8935K 166960K 62777 0 kqueue 14 22K 29K 166960K 297 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 120 187 0 183 1 0 1 1 0 8 0 rtentry 136 224 0 127 4 0 4 4 0 8 0 unpcb 144 1712 0 1693 14 8 6 9 0 8 5 syncache 336 4 0 4 2 1 1 1 0 8 1 tcpqe 32 1 0 1 1 0 1 1 0 8 1 tcpcb 736 540 0 534 13 6 7 7 0 8 6 arp 88 34 0 15 1 0 1 1 0 8 0 ipq 40 5 0 2 1 0 1 1 0 8 0 ipqe 40 73 0 70 1 0 1 1 0 8 0 inpcb 328 2067 0 2055 17 7 10 12 0 8 8 ip6q 72 6 0 1 1 0 1 1 0 8 0 ip6af 40 7 0 2 1 0 1 1 0 8 0 nd6 104 53 0 28 1 0 1 1 0 8 0 pkpcb 40 11 0 11 2 1 1 1 0 8 1 kcovpl 48 14 0 6 1 0 1 1 0 8 0 ppxss 1072 35 0 33 2 1 1 1 0 8 0 pppxif 1384 7 0 7 1 0 1 1 0 8 1 pfstscr 40 1 0 1 1 0 1 1 0 8 1 pfrktable 1344 7 0 5 2 1 1 1 0 8 0 pfanchor 1288 5 0 0 1 0 1 1 0 8 0 pftag 88 6 0 2 1 0 1 1 0 8 0 pfqueue 320 3 0 1 1 0 1 1 0 8 0 pfstitem 24 8 0 2 1 0 1 1 0 8 0 pfstkey 128 12 0 5 1 0 1 1 0 8 0 pfstate 384 6 0 3 1 0 1 1 0 8 0 pfrule 1344 18 0 13 1 0 1 1 0 8 0 rttmr 136 1 0 1 1 1 0 1 0 8 0 art_heap8 4096 5 0 0 5 0 5 5 0 8 0 art_heap4 256 1013 0 629 31 3 28 31 0 8 1 art_table 32 1018 0 629 4 0 4 4 0 8 0 art_node 16 217 0 131 1 0 1 1 0 8 0 sysvmsgpl 40 13 0 9 2 1 1 1 0 8 0 semupl 112 2 0 2 2 1 1 1 0 8 1 semapl 112 122 0 112 1 0 1 1 0 8 0 shmpl 112 78 0 4 3 0 3 3 0 8 0 dirhash 1024 37 0 20 3 0 3 3 0 8 0 dino2pl 256 4494 0 2986 95 0 95 95 0 8 0 ffsino 248 4494 0 2986 95 0 95 95 0 8 0 nchpl 144 6719 0 5020 64 0 64 64 0 8 0 rtmask 32 6 0 6 1 0 1 1 0 8 1 uvmvnodes 80 4586 0 0 94 0 94 94 0 8 0 vnodes 216 4586 0 0 255 0 255 255 0 8 0 namei 1024 25561 0 25560 3 2 1 2 0 8 0 pfiaddrpl 120 1 0 0 1 0 1 1 0 8 0 kstatmem 264 106 0 84 3 0 3 3 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 11 0 11 2 1 1 1 0 8 1 scxspl 216 21737 0 21737 10 2 8 8 1 8 8 plimitpl 152 342 0 326 1 0 1 1 0 8 0 sigapl 424 1968 0 1921 8 0 8 8 0 8 1 knotepl 120 121503 0 121456 38 28 10 24 0 8 8 kqueuepl 184 578 0 568 5 2 3 3 0 8 2 pipepl 296 333 0 302 8 0 8 8 0 8 5 fdescpl 440 1928 0 1899 5 1 4 5 0 8 0 filepl 120 14123 0 13894 24 9 15 17 0 8 7 lockfpl 104 514 0 511 1 0 1 1 0 8 0 lockfspl 48 207 0 204 1 0 1 1 0 8 0 sessionpl 144 29 0 21 1 0 1 1 0 8 0 pgrppl 48 98 0 81 1 0 1 1 0 8 0 ucredpl 104 2459 0 2445 1 0 1 1 0 8 0 zombiepl 144 1923 0 1921 1 0 1 1 0 8 0 processpl 1160 1968 0 1921 5 0 5 5 0 8 0 procpl 656 4173 0 4118 8 0 8 8 0 8 2 sosppl 168 11 0 11 2 1 1 1 0 8 1 sockpl 528 4009 0 3974 36 24 12 20 0 8 8 mcl64k 65536 72 0 72 2 1 1 1 0 8 1 mcl16k 16384 4 0 4 2 1 1 1 0 8 1 mcl12k 12288 2 0 2 1 1 0 1 0 8 0 mcl9k 9216 2 0 2 1 0 1 1 0 8 1 mcl8k 8192 23 0 23 2 1 1 1 0 8 1 mcl4k 4096 4398 0 4341 17 8 9 16 0 8 1 mcl2k2 2112 1 0 1 1 0 1 1 0 8 1 mcl2k 2048 1618 0 1611 5 2 3 3 0 8 1 mtagpl 96 112 0 26 3 0 3 3 0 8 0 mbufpl 256 19903 0 19674 17 0 17 17 0 8 0 bufpl 280 6215 0 127 435 0 435 435 0 8 0 anonpl 24 237010 0 230056 79 22 57 57 0 187 14 amapchunkpl 152 54634 0 53936 44 7 37 37 0 158 9 amappl16 200 3392 0 3323 32 19 13 15 0 8 7 amappl15 192 2 0 2 1 1 0 1 0 8 0 amappl14 184 120 0 110 1 0 1 1 0 8 0 amappl13 176 5 0 5 1 1 0 1 0 8 0 amappl12 168 2631 0 2602 2 0 2 2 0 8 0 amappl11 160 43 0 33 1 0 1 1 0 8 0 amappl10 152 3 0 3 2 1 1 1 0 8 1 amappl9 144 317 0 317 1 1 0 1 0 8 0 amappl8 136 84 0 82 1 0 1 1 0 8 0 amappl7 128 114 0 103 1 0 1 1 0 8 0 amappl6 120 260 0 256 1 0 1 1 0 8 0 amappl5 112 134 0 127 1 0 1 1 0 8 0 amappl4 104 306 0 290 1 0 1 1 0 8 0 amappl3 96 10991 0 10877 4 0 4 4 0 8 0 amappl2 88 701 0 645 2 0 2 2 0 8 0 amappl1 80 14695 0 14150 15 1 14 14 0 8 1 amappl 88 14918 0 14741 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 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 2 1 1 1 0 8 1 dma128 128 258 0 258 2 1 1 1 0 8 1 dma64 64 7 0 7 2 1 1 1 0 8 1 dma32 32 8 0 8 2 1 1 1 0 8 1 dma16 16 83 0 82 1 0 1 1 0 8 0 aobjpl 72 80 0 4 2 0 2 2 0 8 0 uaddrrnd 24 1928 0 1899 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1928 0 1899 1 0 1 1 0 8 0 vmmpekpl 168 14956 0 14905 3 0 3 3 0 8 0 vmmpepl 168 120378 0 118459 106 10 96 96 0 357 9 vmsppl 360 1927 0 1899 4 1 3 4 0 8 0 rwobjpl 32 33689 0 28121 47 0 47 47 0 8 1 pdppl 4096 3863 0 3798 111 44 67 79 0 8 2 pvpl 32 766693 0 753130 165 27 138 138 0 265 24 pmappl 216 1927 0 1899 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 313 0 71 8 0 8 8 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace arp_rtrequest(ffff800000039058,1,fffffd806c25e5e8) at arp_rtrequest+0x65e arprequest sys/netinet/if_ether.c:281 [inline] arp_rtrequest(ffff800000039058,1,fffffd806c25e5e8) at arp_rtrequest+0x65e sys/netinet/if_ether.c:184 rtrequest(1,ffff80003c96d638,0,ffff80003c96d5b0,16) at rtrequest+0xd4c sys/net/route.c:1117 rtm_output(ffff800001604400,ffff80003c96d6e0,ffff80003c96d638,0,16) at rtm_output+0x855 sys/net/rtsock.c:973 route_output(fffffd807470d200,ffff8000015b34a0) at route_output+0x9ac sys/net/rtsock.c:878 route_send(ffff8000015b34a0,fffffd807470d200,0,0) at route_send+0xd7 sys/net/rtsock.c:342 sosend(ffff8000015b34a0,0,ffff80003c96d888,0,0,808) at sosend+0x824 sys/kern/uipc_socket.c:-1 sendit(ffff80002a7f2f90,3,ffff80003c96d980,808,ffff80003c96da30) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendto(ffff80002a7f2f90,ffff80003c96dae0,ffff80003c96da30) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557 syscall(ffff80003c96dae0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96dae0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8200cdf5380, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace arp_rtrequest(ffff800000039058,1,fffffd806c25e5e8) at arp_rtrequest+0x65e arprequest sys/netinet/if_ether.c:281 [inline] arp_rtrequest(ffff800000039058,1,fffffd806c25e5e8) at arp_rtrequest+0x65e sys/netinet/if_ether.c:184 rtrequest(1,ffff80003c96d638,0,ffff80003c96d5b0,16) at rtrequest+0xd4c sys/net/route.c:1117 rtm_output(ffff800001604400,ffff80003c96d6e0,ffff80003c96d638,0,16) at rtm_output+0x855 sys/net/rtsock.c:973 route_output(fffffd807470d200,ffff8000015b34a0) at route_output+0x9ac sys/net/rtsock.c:878 route_send(ffff8000015b34a0,fffffd807470d200,0,0) at route_send+0xd7 sys/net/rtsock.c:342 sosend(ffff8000015b34a0,0,ffff80003c96d888,0,0,808) at sosend+0x824 sys/kern/uipc_socket.c:-1 sendit(ffff80002a7f2f90,3,ffff80003c96d980,808,ffff80003c96da30) at sendit+0x721 sys/kern/uipc_syscalls.c:779 sys_sendto(ffff80002a7f2f90,ffff80003c96dae0,ffff80003c96da30) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:557 syscall(ffff80003c96dae0) at syscall+0x97e mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80003c96dae0) at syscall+0x97e sys/arch/amd64/amd64/trap.c:579 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x8200cdf5380, count: -10