uvm_fault(0xffffffff838cfa28, 0xffff8000015c004a, 0, 1) -> e kernel: page fault trap, code=0 Stopped at arp_rtrequest+0x6a4: movzwl 0xc(%rcx,%rbx,1),%ecx TID PID UID PRFLAGS PFLAGS CPU COMMAND *169903 50850 0 0 0x4000000 0 syz-executor arp_rtrequest(ffff800000039058,1,fffffd806f77cbb0) at arp_rtrequest+0x6a4 arprequest sys/netinet/if_ether.c:325 [inline] arp_rtrequest(ffff800000039058,1,fffffd806f77cbb0) at arp_rtrequest+0x6a4 sys/netinet/if_ether.c:226 rtrequest(1,ffff80002a8c7630,0,ffff80002a8c75a0,16) at rtrequest+0xdc1 sys/net/route.c:1114 rtm_output(ffff800001564800,ffff80002a8c76d8,ffff80002a8c7630,0,16) at rtm_output+0x91a sys/net/rtsock.c:953 route_output(fffffd806d26a000,ffff800010fd9c28) at route_output+0xa2b sys/net/rtsock.c:858 route_send(ffff800010fd9c28,fffffd806d26a000,0,0) at route_send+0xd7 sys/net/rtsock.c:322 sosend(ffff800010fd9c28,0,ffff80002a8c7888,0,0,808) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80003c94c7e8,7,ffff80002a8c7980,808,ffff80002a8c7a20) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendto(ffff80003c94c7e8,ffff80002a8c7ad0,ffff80002a8c7a20) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 syscall(ffff80002a8c7ad0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8c7ad0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb4c7f58cca0, 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(0xffffffff838cfa28, 0xffff8000015c004a, 0, 1) -> e ddb> trace arp_rtrequest(ffff800000039058,1,fffffd806f77cbb0) at arp_rtrequest+0x6a4 arprequest sys/netinet/if_ether.c:325 [inline] arp_rtrequest(ffff800000039058,1,fffffd806f77cbb0) at arp_rtrequest+0x6a4 sys/netinet/if_ether.c:226 rtrequest(1,ffff80002a8c7630,0,ffff80002a8c75a0,16) at rtrequest+0xdc1 sys/net/route.c:1114 rtm_output(ffff800001564800,ffff80002a8c76d8,ffff80002a8c7630,0,16) at rtm_output+0x91a sys/net/rtsock.c:953 route_output(fffffd806d26a000,ffff800010fd9c28) at route_output+0xa2b sys/net/rtsock.c:858 route_send(ffff800010fd9c28,fffffd806d26a000,0,0) at route_send+0xd7 sys/net/rtsock.c:322 sosend(ffff800010fd9c28,0,ffff80002a8c7888,0,0,808) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80003c94c7e8,7,ffff80002a8c7980,808,ffff80002a8c7a20) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendto(ffff80003c94c7e8,ffff80002a8c7ad0,ffff80002a8c7a20) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 syscall(ffff80002a8c7ad0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8c7ad0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb4c7f58cca0, count: -10 ddb> show registers rdi 0x20 rsi 0x90 rbp 0xffff80002a8c7480 rbx 0xde rdx 0 rcx 0xffff8000015bff60 rax 0xfffffd806d26ade0 r8 0x1000 __ALIGN_SIZE r9 0 r10 0x45ee0bc3de4cf4bf r11 0xd9d02d7a9ce26e63 r12 0x25 r13 0xfffffd806d26ad00 r14 0xfffffd806f77cbb0 r15 0xffff800000039058 rip 0xffffffff831402c4 arp_rtrequest+0x6a4 cs 0x8 rflags 0x10246 __ALIGN_SIZE+0xf246 rsp 0xffff80002a8c7400 ss 0x10 arp_rtrequest+0x6a4: movzwl 0xc(%rcx,%rbx,1),%ecx ddb> show proc PROC (syz-executor) tid=169903 pid=50850 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=32, usrpri=86, slppri=32, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80003c94c550,0xffff80002a7cc7f0 process=0xffff8000ffff8498 user=0xffff80002a8c2000, vmspace=0xfffffd806c992e78 estcpu=36, cpticks=3, pctcpu=0.0, user=0, sys=3, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 50850 480571 90608 0 2 0 syz-executor *50850 169903 90608 0 7 0x4000000 syz-executor 50850 452401 90608 0 3 0x4000080 fsleep syz-executor 70548 242774 59850 0 3 0x80 nanoslp syz-executor 70548 317120 59850 0 3 0x4000080 sbwait syz-executor 70548 264190 59850 0 3 0x4000080 fsleep syz-executor 53987 158244 34430 -1 3 0x90 nanoslp syz-executor 53987 351031 34430 -1 3 0x4000090 semwait syz-executor 53987 42449 34430 -1 3 0x4000090 semwait syz-executor 53987 477352 34430 -1 3 0x4000090 fsleep syz-executor 90372 241550 28864 0 3 0x80 nanoslp syz-executor 90372 253406 28864 0 3 0x4000080 nanoslp syz-executor 90372 388070 28864 0 3 0x4000080 fsleep syz-executor 95417 510163 44372 0 3 0x80 nanoslp syz-executor 95417 374094 44372 0 3 0x4000080 netcon syz-executor 95417 165470 44372 0 3 0x4000080 fsleep syz-executor 39306 288032 12636 0 3 0x80 nanoslp syz-executor 39306 447548 12636 0 3 0x4000080 fsleep syz-executor 39306 58135 12636 0 3 0x4000080 pipewr syz-executor 90608 455439 99638 0 3 0x82 nanoslp syz-executor 34704 85111 99638 0 3 0x82 wait syz-executor 12636 119997 99638 0 3 0x82 nanoslp syz-executor 39647 353359 99638 0 2 0x2 syz-executor 44372 221551 99638 0 3 0x82 nanoslp syz-executor 34430 102940 99638 0 3 0x82 nanoslp syz-executor 59850 168160 99638 0 3 0x82 nanoslp syz-executor 28864 442800 99638 0 3 0x82 nanoslp syz-executor 99638 142243 93186 0 3 0x82 kqread syz-executor 93186 362285 54642 0 3 0x10008a sigsusp ksh 54642 491824 29056 0 3 0x98 kqread sshd-session 29056 280614 76768 0 3 0x92 kqread sshd-session 25208 858 1 0 3 0x100083 ttyin getty 76768 71532 1 0 3 0x88 kqread sshd 87992 238482 9033 73 3 0x1100090 kqread syslogd 9033 327819 1 0 3 0x100082 sbwait syslogd 92584 388756 1 0 3 0x100080 kqread resolvd 20362 106853 98665 77 3 0x100092 kqread dhcpleased 6597 104429 98665 77 3 0x100092 kqread dhcpleased 98665 120983 1 0 3 0x80 kqread dhcpleased 51575 468098 0 0 3 0x14200 bored smr 65507 501294 0 0 2 0x14200 zerothread 77032 328553 0 0 3 0x14200 aiodoned aiodoned 36804 114950 0 0 3 0x14200 syncer update 3494 150317 0 0 3 0x14200 cleaner cleaner 68610 160599 0 0 3 0x14200 reaper reaper 62335 221847 0 0 3 0x14200 pgdaemon pagedaemon 13046 263392 0 0 3 0x14200 bored viomb 59797 352701 0 0 3 0x40014200 acpi0 acpi0 28014 364005 0 0 3 0x14200 bored softnet0 86739 107485 0 0 3 0x14200 bored systqmp 1337 260115 0 0 3 0x14200 bored systq 13230 137263 0 0 3 0x40014200 tmoslp softclock 53675 114791 0 0 3 0x40014200 idle0 1 293783 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 10203 11115K 11370K 166960K 11731 0 pcb 83 17K 17K 166960K 163 0 rtable 236 8K 8K 166960K 492 0 pf 31 13K 15K 166960K 59 0 ifaddr 42 7K 7K 166960K 68 0 ifgroup 50 2K 2K 166960K 84 0 sysctl 3 1K 9K 166960K 8 0 counters 32 17K 18K 166960K 48 0 ioctlops 0 0K 4K 166960K 76 0 iov 0 0K 20K 166960K 20 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1378 87K 87K 166960K 1652 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 5 0 VM map 2 1K 1K 166960K 2 0 sem 13 3K 3K 166960K 25 0 dirhash 12 2K 2K 166960K 18 0 ACPI 1692 195K 286K 166960K 12470 0 file desc 17 61K 236K 166960K 469 0 sigio 0 0K 0K 166960K 4 0 proc 60 59K 91K 166960K 549 0 subproc 72 4K 4K 166960K 90 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 39 0 in_multi 99 7K 7K 166960K 136 0 ether_multi 1 0K 0K 166960K 2 0 mrt 1 0K 0K 166960K 4 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 229 1023K 1023K 166960K 229 0 exec 0 0K 1K 166960K 408 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 243 151K 167K 166960K 5549 0 UVM aobj 7 2K 2K 166960K 8 0 pinsyscall 38 76K 88K 166960K 1584 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 1 0K 0K 166960K 13 0 NDP 11 0K 1K 166960K 43 0 temp 76 8652K 8718K 166960K 20156 0 kqueue 14 22K 30K 166960K 91 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 71 0 67 1 0 1 1 0 8 0 rtentry 136 153 0 51 4 0 4 4 0 8 0 unpcb 144 232 0 211 2 0 2 2 0 8 0 syncache 336 4 0 4 1 0 1 1 0 8 1 tcpcb 736 117 0 109 4 0 4 4 0 8 3 arp 96 24 0 6 1 0 1 1 0 8 0 ipq 40 2 0 0 1 0 1 1 0 8 0 ipqe 40 3 0 0 1 0 1 1 0 8 0 inpcb 328 396 0 318 7 0 7 7 0 8 0 ip6q 72 2 0 1 1 0 1 1 0 8 0 ip6af 40 3 0 2 1 0 1 1 0 8 0 nd6 112 34 0 9 1 0 1 1 0 8 0 pkpcb 40 3 0 3 1 0 1 1 0 8 1 kcovpl 48 10 0 2 1 0 1 1 0 8 0 mppekey 1024 2 0 2 1 0 1 1 0 8 1 ppxss 1072 12 0 12 1 0 1 1 0 8 1 pppxif 1384 2 0 2 1 0 1 1 0 8 1 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 rttmr 136 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 667 0 219 31 0 31 31 0 8 2 art_table 40 669 0 219 6 0 6 6 0 8 1 art_node 32 151 0 61 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semupl 112 1 0 0 1 0 1 1 0 8 0 semapl 112 18 0 8 1 0 1 1 0 8 0 shmpl 112 5 0 1 1 0 1 1 0 8 0 dirhash 1024 21 0 4 3 0 3 3 0 8 0 dino2pl 256 2106 0 600 95 0 95 95 0 8 0 ffsino 256 2106 0 600 95 0 95 95 0 8 0 nchpl 144 2705 0 1010 64 0 64 64 0 8 0 vnodes 216 2374 0 0 132 0 132 132 0 8 0 namei 1024 9014 0 9013 2 0 2 2 0 8 1 kstatmem 264 46 0 24 2 0 2 2 0 8 0 scsiplug 72 1 0 1 1 0 1 1 0 8 1 scxspl 216 8629 0 8629 8 0 8 8 1 8 8 plimitpl 152 134 0 117 1 0 1 1 0 8 0 sigapl 424 736 0 694 6 0 6 6 0 8 1 knotepl 120 22134 0 22081 9 0 9 9 0 8 7 kqueuepl 184 125 0 114 1 0 1 1 0 8 0 pipepl 304 141 0 113 3 0 3 3 0 8 0 fdescpl 448 722 0 693 4 0 4 4 0 8 0 filepl 120 3539 0 3236 10 0 10 10 0 8 0 lockfpl 104 188 0 185 2 0 2 2 0 8 1 lockfspl 48 88 0 85 1 0 1 1 0 8 0 sessionpl 144 24 0 16 1 0 1 1 0 8 0 pgrppl 48 39 0 23 1 0 1 1 0 8 0 ucredpl 104 537 0 525 1 0 1 1 0 8 0 zombiepl 144 695 0 694 1 0 1 1 0 8 0 processpl 1152 736 0 694 4 0 4 4 0 8 0 procpl 664 1164 0 1109 6 0 6 6 0 8 1 sosppl 176 1 0 1 1 0 1 1 0 8 1 sockpl 552 713 0 610 8 0 8 8 0 8 0 mcl64k 65536 27 0 27 1 0 1 1 0 8 1 mcl8k 8192 8 0 8 1 0 1 1 0 8 1 mcl4k 4096 2842 0 2790 16 1 15 16 0 8 7 mcl2k 2048 717 0 714 4 0 4 4 0 8 2 mtagpl 96 7 0 4 1 0 1 1 0 8 0 mbufpl 256 7179 0 6999 15 0 15 15 0 8 1 bufpl 280 3887 0 120 270 0 270 270 0 8 0 anonpl 24 136679 0 133428 44 0 44 44 0 187 18 amapchunkpl 152 17820 0 17300 34 0 34 34 0 158 12 amappl16 200 2604 0 2573 15 4 11 15 0 8 8 amappl15 192 8 0 8 1 0 1 1 0 8 1 amappl14 184 6 0 5 1 0 1 1 0 8 0 amappl13 176 429 0 428 1 0 1 1 0 8 0 amappl12 168 1079 0 1041 2 0 2 2 0 8 0 amappl11 160 6 0 6 1 0 1 1 0 8 1 amappl10 152 49 0 39 1 0 1 1 0 8 0 amappl9 144 244 0 244 1 0 1 1 0 8 1 amappl8 136 26 0 25 1 0 1 1 0 8 0 amappl7 128 87 0 86 1 0 1 1 0 8 0 amappl6 120 296 0 285 1 0 1 1 0 8 0 amappl5 112 101 0 93 1 0 1 1 0 8 0 amappl4 104 405 0 379 1 0 1 1 0 8 0 amappl3 96 2936 0 2837 3 0 3 3 0 8 0 amappl2 88 835 0 766 2 0 2 2 0 8 0 amappl1 80 10401 0 9863 13 0 13 13 0 8 1 amappl 88 4767 0 4592 5 0 5 5 0 92 0 uvmvnodes 80 111 0 0 3 0 3 3 0 8 0 dma4096 4096 1 0 1 1 0 1 1 0 8 1 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma512 512 1 0 1 1 0 1 1 0 8 1 dma256 256 6 0 6 1 0 1 1 0 8 1 dma128 128 254 0 254 1 0 1 1 0 8 1 dma64 64 6 0 6 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 7 0 1 1 0 1 1 0 8 0 uaddrrnd 24 722 0 693 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 722 0 693 1 0 1 1 0 8 0 vmmpekpl 168 7173 0 7132 3 0 3 3 0 8 0 vmmpepl 168 53211 0 51402 90 0 90 90 0 357 9 vmsppl 368 721 0 693 4 0 4 4 0 8 1 rwobjpl 40 17210 0 16232 13 0 13 13 0 8 1 pdppl 4096 1451 0 1386 95 28 67 75 0 8 2 pvpl 32 341829 0 330916 115 0 115 115 0 265 23 pmappl 216 721 0 693 2 0 2 2 0 8 0 extentpl 40 45 0 27 1 0 1 1 0 8 0 phpool 112 378 0 29 11 0 11 11 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace arp_rtrequest(ffff800000039058,1,fffffd806f77cbb0) at arp_rtrequest+0x6a4 arprequest sys/netinet/if_ether.c:325 [inline] arp_rtrequest(ffff800000039058,1,fffffd806f77cbb0) at arp_rtrequest+0x6a4 sys/netinet/if_ether.c:226 rtrequest(1,ffff80002a8c7630,0,ffff80002a8c75a0,16) at rtrequest+0xdc1 sys/net/route.c:1114 rtm_output(ffff800001564800,ffff80002a8c76d8,ffff80002a8c7630,0,16) at rtm_output+0x91a sys/net/rtsock.c:953 route_output(fffffd806d26a000,ffff800010fd9c28) at route_output+0xa2b sys/net/rtsock.c:858 route_send(ffff800010fd9c28,fffffd806d26a000,0,0) at route_send+0xd7 sys/net/rtsock.c:322 sosend(ffff800010fd9c28,0,ffff80002a8c7888,0,0,808) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80003c94c7e8,7,ffff80002a8c7980,808,ffff80002a8c7a20) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendto(ffff80003c94c7e8,ffff80002a8c7ad0,ffff80002a8c7a20) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 syscall(ffff80002a8c7ad0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8c7ad0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb4c7f58cca0, count: -10 ddb> machine ddbcpu 1 No such command ddb> trace arp_rtrequest(ffff800000039058,1,fffffd806f77cbb0) at arp_rtrequest+0x6a4 arprequest sys/netinet/if_ether.c:325 [inline] arp_rtrequest(ffff800000039058,1,fffffd806f77cbb0) at arp_rtrequest+0x6a4 sys/netinet/if_ether.c:226 rtrequest(1,ffff80002a8c7630,0,ffff80002a8c75a0,16) at rtrequest+0xdc1 sys/net/route.c:1114 rtm_output(ffff800001564800,ffff80002a8c76d8,ffff80002a8c7630,0,16) at rtm_output+0x91a sys/net/rtsock.c:953 route_output(fffffd806d26a000,ffff800010fd9c28) at route_output+0xa2b sys/net/rtsock.c:858 route_send(ffff800010fd9c28,fffffd806d26a000,0,0) at route_send+0xd7 sys/net/rtsock.c:322 sosend(ffff800010fd9c28,0,ffff80002a8c7888,0,0,808) at sosend+0x804 sys/kern/uipc_socket.c:-1 sendit(ffff80003c94c7e8,7,ffff80002a8c7980,808,ffff80002a8c7a20) at sendit+0x5a5 sys/kern/uipc_syscalls.c:785 sys_sendto(ffff80003c94c7e8,ffff80002a8c7ad0,ffff80002a8c7a20) at sys_sendto+0x8d sys/kern/uipc_syscalls.c:563 syscall(ffff80002a8c7ad0) at syscall+0x962 mi_syscall sys/sys/syscall_mi.h:-1 [inline] syscall(ffff80002a8c7ad0) at syscall+0x962 sys/arch/amd64/amd64/trap.c:765 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xb4c7f58cca0, count: -10