login: panic: attempt to execute user address 0x0 in supervisor mode Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *152954 50556 0 0 0x4000000 0 syz-executor.1 db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 pageflttrap() at pageflttrap+0x3eb kerntrap(ffff80001775da30) at kerntrap+0xdb sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800017b5d000,fffffd802e4d7008,10,ffff80000005b490,ffff80001775dc98) at alltraps_kern_meltdown+0x7b 0(b,ffff80001775dbf8,83,ffff80001775dc98,0,b) at 0 rt_match(fffffd8036ff95f8,0,1,0) at rt_match+0xbe rt_clone sys/net/route.c:266 [inline] rt_match(fffffd8036ff95f8,0,1,0) at rt_match+0xbe sys/net/route.c:242 in_pcbselsrc(ffff80001775dd70,fffffd802f75ac20,fffffd8036ff9578) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934 in_pcbconnect(fffffd8036ff9578,fffffd802f75ac00) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492 udp_usrreq(fffffd802e48e910,4,0,fffffd802f75ac00,0,ffff8000ffff3b40) at udp_usrreq+0x560 sys_connect(ffff8000ffff3b40,ffff80001775def8,ffff80001775df40) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388 syscall(ffff80001775dfc0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,fffffffffffffecf,0,3,d6cca661010) at Xsyscall+0x128 end of kernel end trace frame: 0xd6f78e27e10, count: 2 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 attempt to execute user address 0x0 in supervisor mode ddb> trace db_enter() at db_enter+0x18 sys/arch/amd64/amd64/db_interface.c:398 panic() at panic+0x15c sys/kern/subr_prf.c:207 pageflttrap() at pageflttrap+0x3eb kerntrap(ffff80001775da30) at kerntrap+0xdb sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800017b5d000,fffffd802e4d7008,10,ffff80000005b490,ffff80001775dc98) at alltraps_kern_meltdown+0x7b 0(b,ffff80001775dbf8,83,ffff80001775dc98,0,b) at 0 rt_match(fffffd8036ff95f8,0,1,0) at rt_match+0xbe rt_clone sys/net/route.c:266 [inline] rt_match(fffffd8036ff95f8,0,1,0) at rt_match+0xbe sys/net/route.c:242 in_pcbselsrc(ffff80001775dd70,fffffd802f75ac20,fffffd8036ff9578) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934 in_pcbconnect(fffffd8036ff9578,fffffd802f75ac00) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492 udp_usrreq(fffffd802e48e910,4,0,fffffd802f75ac00,0,ffff8000ffff3b40) at udp_usrreq+0x560 sys_connect(ffff8000ffff3b40,ffff80001775def8,ffff80001775df40) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388 syscall(ffff80001775dfc0) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,fffffffffffffecf,0,3,d6cca661010) at Xsyscall+0x128 end of kernel end trace frame: 0xd6f78e27e10, count: -13 ddb> show registers rdi 0xffffffff81ed85e7 db_enter+0x17 rsi 0x226e __ALIGN_SIZE+0x126e rbp 0xffff80001775d8a0 rbx 0xffff80001775d950 rdx 0x226f __ALIGN_SIZE+0x126f rcx 0xffff800017b5d000 rax 0xffff800017b5d000 r8 0xffff80001775d860 r9 0x1 r10 0xffff800000b2d1c0 r11 0x87daf6ec00aa221a r12 0x3000000008 r13 0xffff80001775d8b0 r14 0x100 r15 0x1 rip 0xffffffff81ed85e8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001775d890 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=152954 stat=onproc flags process=0 proc=4000000 pri=82, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff2780,0xffff8000ffff3170 process=0xffff8000ffff6010 user=0xffff800017759000, vmspace=0xfffffd803f014000 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 97760 398060 66564 0 2 0 syz-executor.0 97760 467955 66564 0 3 0x4000080 fsleep syz-executor.0 50556 80285 3121 0 2 0 syz-executor.1 *50556 152954 3121 0 7 0x4000000 syz-executor.1 57626 14922 0 0 3 0x14200 acct acct 3121 439346 98516 0 3 0x82 nanosleep syz-executor.1 66564 518476 98516 0 3 0x82 nanosleep syz-executor.0 93093 149010 1 0 3 0x100083 ttyin getty 29337 475735 0 0 3 0x14200 bored sosplice 98516 348985 97289 0 3 0x82 thrsleep syz-fuzzer 98516 401876 97289 0 3 0x4000082 thrsleep syz-fuzzer 98516 290879 97289 0 3 0x4000082 thrsleep syz-fuzzer 98516 46207 97289 0 3 0x4000082 thrsleep syz-fuzzer 98516 253524 97289 0 3 0x4000082 thrsleep syz-fuzzer 98516 60400 97289 0 3 0x4000082 kqread syz-fuzzer 98516 168765 97289 0 3 0x4000082 thrsleep syz-fuzzer 97289 199569 83024 0 3 0x10008a pause ksh 83024 229321 2636 0 3 0x92 select sshd 2636 341199 1 0 3 0x80 select sshd 70015 290033 64131 73 3 0x100090 kqread syslogd 64131 397239 1 0 3 0x100082 netio syslogd 67149 281799 1 77 3 0x100090 poll dhclient 73892 511703 1 0 3 0x80 poll dhclient 18295 484436 0 0 2 0x14200 zerothread 35541 294825 0 0 3 0x14200 aiodoned aiodoned 61442 508074 0 0 3 0x14200 syncer update 29054 141693 0 0 3 0x14200 cleaner cleaner 92326 99119 0 0 3 0x14200 reaper reaper 83117 58369 0 0 3 0x14200 pgdaemon pagedaemon 53406 373668 0 0 3 0x14200 bored crynlk 67175 404318 0 0 3 0x14200 bored crypto 19400 228978 0 0 3 0x40014200 acpi0 acpi0 43840 368093 0 0 3 0x14200 bored softnet 86513 454439 0 0 3 0x14200 bored systqmp 34497 473218 0 0 3 0x14200 bored systq 92118 230783 0 0 3 0x40014200 bored softclock 44824 175376 0 0 3 0x40014200 idle0 8668 352924 0 0 3 0x14200 bored smr 1 452268 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 Kern Lim devbuf 9590 7012K 7180K 78643K 13723 0 0 pcb 13 12K 14K 78643K 1461 0 0 rtable 115 12K 13K 78643K 3217 0 0 ifaddr 88 20K 21K 78643K 1010 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 203 0 0 iov 0 0K 32K 78643K 1217 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1201 75K 77K 78643K 4562 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 5K 78643K 44 0 0 VM map 2 0K 0K 78643K 27 0 0 sem 12 0K 1K 78643K 1361 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 6 17K 25K 78643K 5402 0 0 sigio 0 0K 0K 78643K 67 0 0 proc 50 38K 55K 78643K 2050 0 0 subproc 32 2K 2K 78643K 577 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 0K 78643K 264 0 0 in_multi 25 1K 2K 78643K 532 0 0 ether_multi 1 0K 0K 78643K 22 0 0 mrt 0 0K 0K 78643K 53 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 162 715K 715K 78643K 162 0 0 exec 0 0K 1K 78643K 1262 0 0 pfkey data 0 0K 0K 78643K 2 0 0 pagedep 1 8K 8K 78643K 1 0 0 inodedep 1 32K 32K 78643K 1 0 0 newblk 1 0K 0K 78643K 1 0 0 VM swap 7 26K 26K 78643K 7 0 0 UVM amap 112 22K 30K 78643K 14323 0 0 UVM aobj 130 8K 8K 78643K 140 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 1K 78643K 1617 0 0 NDP 21 0K 1K 78643K 312 0 0 temp 233 3537K 4177K 78643K 111496 0 0 kqueue 0 0K 0K 78643K 35 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 98 0 92 1 0 1 1 0 8 0 rtpcb 80 361 0 359 1 0 1 1 0 8 0 rtentry 112 516 0 476 2 0 2 2 0 8 0 unpcb 120 1982 0 1970 2 1 1 2 0 8 0 syncache 264 28 0 28 12 11 1 1 0 8 1 tcpqe 32 4525 0 4525 6 6 0 2 0 8 0 tcpcb 544 2297 0 2292 26 25 1 13 0 8 0 ipq 40 19 0 19 8 7 1 1 0 8 1 ipqe 40 52 0 52 8 7 1 1 0 8 1 inpcb 280 6547 0 6539 40 38 2 13 0 8 1 rttmr 72 18 0 17 8 7 1 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 ip6af 40 2 0 2 1 1 0 1 0 8 0 nd6 48 72 0 70 3 2 1 1 0 8 0 pkpcb 40 18 0 18 5 5 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 132 0 132 17 16 1 1 0 8 1 art_heap8 4096 4 0 3 4 3 1 3 0 8 0 art_heap4 256 2138 0 1929 38 23 15 16 0 8 1 art_table 32 2142 0 1932 3 0 3 3 0 8 0 art_node 16 508 0 472 1 0 1 1 0 8 0 sysvmsgpl 40 38 0 25 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 1355 0 1345 1 0 1 1 0 8 0 shmpl 112 138 0 10 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 10794 0 9386 46 0 46 46 0 8 0 ffsino 240 10794 0 9386 84 0 84 84 0 8 0 nchpl 144 18291 0 16655 61 0 61 61 0 8 0 uvmvnodes 72 8269 0 0 151 0 151 151 0 8 0 vnodes 208 8269 0 0 436 0 436 436 0 8 0 namei 1024 77350 0 77350 8 7 1 1 0 8 1 vmpool 520 25 0 25 9 9 0 1 0 8 0 scsiplug 64 8 0 8 5 5 0 1 0 8 0 scxspl 192 80139 0 80139 44 41 3 7 0 8 3 plimitpl 152 445 0 438 1 0 1 1 0 8 0 sigapl 432 5484 0 5470 2 0 2 2 0 8 0 futexpl 56 134532 0 134531 7 6 1 1 0 8 0 knotepl 112 1364 0 1345 2 1 1 2 0 8 0 kqueuepl 104 1810 0 1808 7 6 1 4 0 8 0 pipepl 112 10986 0 10965 14 13 1 2 0 8 0 fdescpl 424 5485 0 5470 2 0 2 2 0 8 0 filepl 120 60676 0 60574 37 32 5 11 0 8 1 lockfpl 104 2087 0 2085 1 0 1 1 0 8 0 lockfspl 48 692 0 690 1 0 1 1 0 8 0 sessionpl 112 52 0 42 1 0 1 1 0 8 0 pgrppl 48 74 0 64 1 0 1 1 0 8 0 ucredpl 96 19424 0 19417 1 0 1 1 0 8 0 zombiepl 144 5475 0 5475 2 1 1 1 0 8 1 processpl 864 5506 0 5475 4 0 4 4 0 8 0 procpl 632 12058 0 12019 5 1 4 5 0 8 0 sosppl 128 55 0 55 15 14 1 1 0 8 1 sockpl 384 8944 0 8922 57 54 3 22 0 8 0 mcl64k 65536 1178 0 1178 76 43 33 33 0 8 33 mcl16k 16384 41 0 41 20 19 1 1 0 8 1 mcl12k 12288 123 0 123 15 14 1 1 0 8 1 mcl9k 9216 93 0 93 19 18 1 1 0 8 1 mcl8k 8192 157 0 157 14 13 1 1 0 8 1 mcl4k 4096 495 0 495 8 7 1 1 0 8 1 mcl2k2 2112 49 0 49 24 23 1 1 0 8 1 mcl2k 2048 68845 0 68801 38 31 7 23 0 8 1 mtagpl 80 50 0 50 3 3 0 1 0 8 0 mbufpl 256 148171 0 148078 53 32 21 24 0 8 8 bufpl 256 32206 0 23903 520 0 520 520 0 8 0 anonpl 16 673042 0 657889 217 139 78 83 0 62 8 amapchunkpl 152 29277 0 29170 111 102 9 18 0 158 4 amappl16 192 33096 0 32194 254 200 54 59 0 8 8 amappl15 184 677 0 675 7 6 1 1 0 8 0 amappl14 176 978 0 977 1 0 1 1 0 8 0 amappl13 168 783 0 781 6 5 1 1 0 8 0 amappl12 160 889 0 886 1 0 1 1 0 8 0 amappl11 152 684 0 673 1 0 1 1 0 8 0 amappl10 144 393 0 392 1 0 1 1 0 8 0 amappl9 136 2154 0 2147 1 0 1 1 0 8 0 amappl8 128 1636 0 1602 2 0 2 2 0 8 0 amappl7 120 533 0 525 1 0 1 1 0 8 0 amappl6 112 644 0 627 1 0 1 1 0 8 0 amappl5 104 1260 0 1249 1 0 1 1 0 8 0 amappl4 96 5994 0 5961 1 0 1 1 0 8 0 amappl3 88 1331 0 1325 1 0 1 1 0 8 0 amappl2 80 41704 0 41628 3 1 2 3 0 8 0 amappl1 72 111552 0 111136 26 17 9 20 0 8 0 amappl 80 12801 0 12764 1 0 1 1 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 17 0 17 1 1 0 1 0 8 0 aobjpl 64 139 0 10 3 0 3 3 0 8 0 uaddrrnd 24 5510 0 5470 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5510 0 5470 1 0 1 1 0 8 0 vmmpekpl 168 54551 0 54528 2 0 2 2 0 8 0 vmmpepl 168 670074 0 668012 385 265 120 124 0 357 27 vmsppl 272 5484 0 5470 4 3 1 2 0 8 0 pdppl 4096 11026 0 10990 6 1 5 6 0 8 0 pvpl 32 1942105 0 1923724 654 426 228 299 0 265 67 pmappl 200 5509 0 5495 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 904 0 209 20 0 20 20 0 8 0