panic: attempt to execute user address 0x20ffe000 in supervisor mode Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *477042 93016 0 0 0x4000000 0 syz-executor.0 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(ffff800016d4e200) at kerntrap+0xdb sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800016b37000,fffffd802e823d98,10,ffff800000025520,ffff800016d4e468) at alltraps_kern_meltdown+0x7b __kernel_end_phys(b,ffff800016d4e3c8,83,ffff800016d4e468,0,b) at 0x20ffe000 rt_match(fffffd803da3c4e0,fffffd803a6ccdf8,1,0) at rt_match+0xbe rt_clone sys/net/route.c:266 [inline] rt_match(fffffd803da3c4e0,fffffd803a6ccdf8,1,0) at rt_match+0xbe sys/net/route.c:242 ip_output(fffffd803a6ccd00,0,fffffd803da3c4d0,20,0,fffffd803da3c460) at ip_output+0x4d2 sys/netinet/ip_output.c:204 rip_output(fffffd803a6ccd00,fffffd802eb847b0,ffff800016d4e678,ffff800016b37000) at rip_output+0x22b sys/netinet/raw_ip.c:289 rip_usrreq(fffffd802eb847b0,9,fffffd803a6ccd00,0,0,ffff8000ffff2018) at rip_usrreq+0x46a sys/netinet/raw_ip.c:538 sosend(fffffd802eb847b0,0,ffff800016d4e7e0,0,0,0) at sosend+0x63d sys/kern/uipc_socket.c:524 sendit(ffff8000ffff2018,4,ffff800016d4e8c0,0,ffff800016d4e9a0) at sendit+0x52b sys/kern/uipc_syscalls.c:662 sys_sendto(ffff8000ffff2018,ffff800016d4e958,ffff800016d4e9a0) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:527 syscall(ffff800016d4ea20) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 end trace frame: 0xffff800016d4eaa0, count: 0 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 0x20ffe000 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(ffff800016d4e200) at kerntrap+0xdb sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800016b37000,fffffd802e823d98,10,ffff800000025520,ffff800016d4e468) at alltraps_kern_meltdown+0x7b __kernel_end_phys(b,ffff800016d4e3c8,83,ffff800016d4e468,0,b) at 0x20ffe000 rt_match(fffffd803da3c4e0,fffffd803a6ccdf8,1,0) at rt_match+0xbe rt_clone sys/net/route.c:266 [inline] rt_match(fffffd803da3c4e0,fffffd803a6ccdf8,1,0) at rt_match+0xbe sys/net/route.c:242 ip_output(fffffd803a6ccd00,0,fffffd803da3c4d0,20,0,fffffd803da3c460) at ip_output+0x4d2 sys/netinet/ip_output.c:204 rip_output(fffffd803a6ccd00,fffffd802eb847b0,ffff800016d4e678,ffff800016b37000) at rip_output+0x22b sys/netinet/raw_ip.c:289 rip_usrreq(fffffd802eb847b0,9,fffffd803a6ccd00,0,0,ffff8000ffff2018) at rip_usrreq+0x46a sys/netinet/raw_ip.c:538 sosend(fffffd802eb847b0,0,ffff800016d4e7e0,0,0,0) at sosend+0x63d sys/kern/uipc_socket.c:524 sendit(ffff8000ffff2018,4,ffff800016d4e8c0,0,ffff800016d4e9a0) at sendit+0x52b sys/kern/uipc_syscalls.c:662 sys_sendto(ffff8000ffff2018,ffff800016d4e958,ffff800016d4e9a0) at sys_sendto+0x80 sys/kern/uipc_syscalls.c:527 syscall(ffff800016d4ea20) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,ffffffffffffffd7,0,6,7b9cd0230e0) at Xsyscall+0x128 end of kernel end trace frame: 0x7bc37502070, count: -15 ddb> show registers rdi 0xffffffff812241d7 db_enter+0x17 rsi 0x264f __ALIGN_SIZE+0x164f rbp 0xffff800016d4e070 rbx 0xffff800016d4e120 rdx 0x2650 __ALIGN_SIZE+0x1650 rcx 0xffff800016b37000 rax 0xffff800016b37000 r8 0xffff800016d4e030 r9 0x1 r10 0xffff800000a63680 r11 0x37c3f2bd8de1e8bd r12 0x3000000008 r13 0xffff800016d4e080 r14 0x100 r15 0x1 rip 0xffffffff812241d8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800016d4e060 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=477042 stat=onproc flags process=0 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff33d8,0xffffffff825686e0 process=0xffff8000148a26d8 user=0xffff800016d49000, vmspace=0xfffffd803f013cc0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 50723 357356 8420 0 2 0 syz-executor.1 50723 221870 8420 0 3 0x4000080 fsleep syz-executor.1 93016 35875 39127 0 2 0 syz-executor.0 93016 392114 39127 0 3 0x4000080 netio syz-executor.0 *93016 477042 39127 0 7 0x4000000 syz-executor.0 39127 151283 28961 0 3 0x82 nanosleep syz-executor.0 8420 496711 28961 0 3 0x82 nanosleep syz-executor.1 53450 101802 1 0 3 0x100083 ttyin getty 59237 179247 0 0 3 0x14200 bored sosplice 28961 95763 40932 0 3 0x82 thrsleep syz-fuzzer 28961 205206 40932 0 3 0x4000082 thrsleep syz-fuzzer 28961 147042 40932 0 3 0x4000082 kqread syz-fuzzer 28961 269162 40932 0 3 0x4000082 thrsleep syz-fuzzer 28961 115425 40932 0 3 0x4000082 thrsleep syz-fuzzer 28961 282257 40932 0 3 0x4000082 thrsleep syz-fuzzer 28961 12477 40932 0 3 0x4000082 thrsleep syz-fuzzer 28961 57756 40932 0 3 0x4000082 thrsleep syz-fuzzer 40932 202419 76706 0 3 0x10008a pause ksh 76706 126986 25743 0 3 0x92 select sshd 25743 345062 1 0 3 0x80 select sshd 44427 131672 10157 73 3 0x100090 kqread syslogd 10157 64915 1 0 3 0x100082 netio syslogd 2599 161885 1 77 3 0x100090 poll dhclient 6454 417514 1 0 3 0x80 poll dhclient 33278 466577 0 0 2 0x14200 zerothread 49406 254879 0 0 3 0x14200 aiodoned aiodoned 52473 312518 0 0 3 0x14200 syncer update 5057 33574 0 0 3 0x14200 cleaner cleaner 43835 429121 0 0 3 0x14200 reaper reaper 59664 360947 0 0 3 0x14200 pgdaemon pagedaemon 82751 317700 0 0 3 0x14200 bored crynlk 98261 157565 0 0 3 0x14200 bored crypto 34515 21980 0 0 3 0x40014200 acpi0 acpi0 11277 28114 0 0 3 0x14200 bored softnet 28946 257358 0 0 3 0x14200 bored systqmp 23383 475055 0 0 3 0x14200 bored systq 13764 297454 0 0 3 0x40014200 bored softclock 75221 313361 0 0 3 0x40014200 idle0 80390 305370 0 0 3 0x14200 bored smr 1 246873 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 9616 6399K 7665K 78643K 20895 0 0 pcb 13 10K 12K 78643K 1024 0 0 rtable 113 8K 9K 78643K 3212 0 0 ifaddr 93 20K 23K 78643K 999 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 276 0 0 iov 0 0K 28K 78643K 1180 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1205 76K 77K 78643K 5397 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 2 1K 9K 78643K 96 0 0 VM map 2 0K 0K 78643K 28 0 0 sem 12 0K 1K 78643K 907 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1793 195K 288K 78643K 12645 0 0 file desc 6 17K 25K 78643K 5113 0 0 sigio 0 0K 0K 78643K 100 0 0 proc 50 38K 63K 78643K 1934 0 0 subproc 32 2K 2K 78643K 446 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 626 0 0 in_multi 25 1K 2K 78643K 650 0 0 ether_multi 1 0K 0K 78643K 17 0 0 mrt 0 0K 0K 78643K 23 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 174 768K 768K 78643K 174 0 0 exec 0 0K 1K 78643K 1118 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 132 23K 32K 78643K 13793 0 0 UVM aobj 130 4K 5K 78643K 211 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 0K 78643K 991 0 0 NDP 22 0K 1K 78643K 319 0 0 temp 240 3537K 4172K 78643K 148501 0 0 kqueue 0 0K 0K 78643K 51 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 99 0 93 1 0 1 1 0 8 0 rtpcb 80 421 0 419 1 0 1 1 0 8 0 rtentry 112 513 0 473 2 0 2 2 0 8 0 unpcb 120 3009 0 2996 6 5 1 2 0 8 0 syncache 264 33 0 33 16 16 0 1 0 8 0 sackhl 24 2 0 2 2 2 0 1 0 8 0 tcpqe 32 7126 0 7126 8 8 0 1 0 8 0 tcpcb 544 1628 0 1624 3 2 1 2 0 8 0 ipq 40 34 0 34 12 12 0 1 0 8 0 ipqe 40 84 0 84 12 12 0 1 0 8 0 inpcb 280 13406 0 13397 49 41 8 13 0 8 7 rttmr 72 8 0 7 3 2 1 1 0 8 0 ip6q 72 3 0 2 3 2 1 1 0 8 0 nd6 48 65 0 63 4 3 1 1 0 8 0 pkpcb 40 31 0 31 10 10 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 113 0 113 19 19 0 1 0 8 0 art_heap8 4096 9 0 8 7 6 1 3 0 8 0 art_heap4 256 2157 0 1947 44 27 17 18 0 8 1 art_table 32 2166 0 1955 3 0 3 3 0 8 0 art_node 16 498 0 462 1 0 1 1 0 8 0 sysvmsgpl 40 38 0 30 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 905 0 895 1 0 1 1 0 8 0 shmpl 112 209 0 81 5 1 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 9551 0 8151 46 0 46 46 0 8 0 ffsino 240 9551 0 8151 83 0 83 83 0 8 0 nchpl 144 17198 0 15597 61 0 61 61 0 8 0 uvmvnodes 72 8190 0 0 149 0 149 149 0 8 0 vnodes 208 8190 0 0 432 0 432 432 0 8 0 namei 1024 57824 0 57824 5 4 1 1 0 8 1 vmpool 520 26 0 26 12 12 0 1 0 8 0 scsiplug 64 3 0 3 3 3 0 1 0 8 0 scxspl 192 74263 0 74263 38 37 1 7 0 8 1 plimitpl 152 463 0 456 1 0 1 1 0 8 0 sigapl 432 5215 0 5201 2 0 2 2 0 8 0 futexpl 56 128700 0 128699 5 4 1 1 0 8 0 knotepl 112 1293 0 1274 2 1 1 2 0 8 0 kqueuepl 104 1315 0 1313 1 0 1 1 0 8 0 pipepl 112 3020 0 3001 11 10 1 2 0 8 0 fdescpl 424 5216 0 5201 2 0 2 2 0 8 0 filepl 120 45304 0 45206 38 28 10 11 0 8 7 lockfpl 104 1980 0 1979 1 0 1 1 0 8 0 lockfspl 48 624 0 623 1 0 1 1 0 8 0 sessionpl 112 44 0 34 1 0 1 1 0 8 0 pgrppl 48 86 0 76 1 0 1 1 0 8 0 ucredpl 96 6076 0 6069 1 0 1 1 0 8 0 zombiepl 144 5202 0 5202 2 1 1 1 0 8 1 processpl 864 5232 0 5202 4 0 4 4 0 8 0 procpl 632 11742 0 11702 5 1 4 5 0 8 0 sosppl 128 73 0 73 19 19 0 1 0 8 0 sockpl 384 16923 0 16899 86 76 10 22 0 8 7 mcl64k 65536 1741 0 1741 162 161 1 64 0 8 1 mcl16k 16384 58 0 58 23 23 0 1 0 8 0 mcl12k 12288 212 0 212 12 11 1 1 0 8 1 mcl9k 9216 173 0 173 12 11 1 1 0 8 1 mcl8k 8192 187 0 187 17 16 1 1 0 8 1 mcl4k 4096 727 0 727 9 8 1 1 0 8 1 mcl2k2 2112 61 0 61 20 19 1 1 0 8 1 mcl2k 2048 58716 0 58673 40 33 7 20 0 8 1 mtagpl 80 216 0 210 8 7 1 1 0 8 0 mbufpl 256 142853 0 142766 123 109 14 38 0 8 2 bufpl 256 30575 0 22385 513 0 513 513 0 8 0 anonpl 16 663338 0 647942 228 151 77 85 0 62 7 amapchunkpl 152 30302 0 30165 124 115 9 19 0 158 3 amappl16 192 32583 0 31721 255 203 52 58 0 8 7 amappl15 184 1009 0 1007 1 0 1 1 0 8 0 amappl14 176 641 0 638 1 0 1 1 0 8 0 amappl13 168 287 0 285 5 4 1 1 0 8 0 amappl12 160 1172 0 1169 1 0 1 1 0 8 0 amappl11 152 1426 0 1415 1 0 1 1 0 8 0 amappl10 144 445 0 442 1 0 1 1 0 8 0 amappl9 136 936 0 929 1 0 1 1 0 8 0 amappl8 128 461 0 415 2 0 2 2 0 8 0 amappl7 120 582 0 572 1 0 1 1 0 8 0 amappl6 112 1377 0 1366 1 0 1 1 0 8 0 amappl5 104 1524 0 1514 1 0 1 1 0 8 0 amappl4 96 4234 0 4202 1 0 1 1 0 8 0 amappl3 88 2331 0 2325 1 0 1 1 0 8 0 amappl2 80 40133 0 40056 3 1 2 3 0 8 0 amappl1 72 105604 0 105170 28 19 9 20 0 8 0 amappl 80 12422 0 12376 3 1 2 2 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 64 210 0 81 3 0 3 3 0 8 0 uaddrrnd 24 5242 0 5201 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5242 0 5201 1 0 1 1 0 8 0 vmmpekpl 168 36253 0 36225 2 0 2 2 0 8 0 vmmpepl 168 634881 0 632813 386 269 117 122 0 357 21 vmsppl 272 5215 0 5201 6 5 1 2 0 8 0 pdppl 4096 10490 0 10454 6 1 5 6 0 8 0 pvpl 32 2081108 0 2062493 554 371 183 298 0 265 19 pmappl 200 5241 0 5227 1 0 1 1 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 1046 0 397 23 3 20 20 0 8 0