panic: attempt to access user address 0x2000000c in supervisor mode Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *135232 25647 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(ffff800014919b40) at kerntrap+0xdb sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b in_delmulti(20000000) at in_delmulti+0x95 sys/netinet/in.c:894 in_purgeaddr(ffff800000aa5700) at in_purgeaddr+0x156 sys/netinet/in.c:740 in_ifdetach(ffff800000a63800) at in_ifdetach+0x74 sys/netinet/in.c:949 if_setrdomain(ffff800000a63800,6) at if_setrdomain+0x19a sys/net/if.c:1888 ifioctl(fffffd8038e9ec00,8020699f,ffff800014919e30,ffff800015957458) at ifioctl+0x169d sys/net/if.c:2148 sys_ioctl(ffff800015957458,ffff800014919f48,ffff800014919f90) at sys_ioctl+0x5b9 syscall(ffff80001491a010) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9ccf3deaaa0, 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 access user address 0x2000000c 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(ffff800014919b40) at kerntrap+0xdb sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown() at alltraps_kern_meltdown+0x7b in_delmulti(20000000) at in_delmulti+0x95 sys/netinet/in.c:894 in_purgeaddr(ffff800000aa5700) at in_purgeaddr+0x156 sys/netinet/in.c:740 in_ifdetach(ffff800000a63800) at in_ifdetach+0x74 sys/netinet/in.c:949 if_setrdomain(ffff800000a63800,6) at if_setrdomain+0x19a sys/net/if.c:1888 ifioctl(fffffd8038e9ec00,8020699f,ffff800014919e30,ffff800015957458) at ifioctl+0x169d sys/net/if.c:2148 sys_ioctl(ffff800015957458,ffff800014919f48,ffff800014919f90) at sys_ioctl+0x5b9 syscall(ffff80001491a010) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0x9ccf3deaaa0, count: -13 ddb> show registers rdi 0xffffffff815aa087 db_enter+0x17 rsi 0x1aaf7 acpi_pdirpa+0x695f rbp 0xffff8000149199b0 rbx 0xffff800014919a60 rdx 0x1aaf8 acpi_pdirpa+0x6960 rcx 0xffff800014923000 rax 0xffff800014923000 r8 0xffff800014919970 r9 0x1 r10 0xffff800000a66940 r11 0x57789003434f6190 r12 0x3000000008 r13 0xffff8000149199c0 r14 0x100 r15 0x1 rip 0xffffffff815aa088 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000149199a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.1) pid=135232 stat=onproc flags process=0 proc=4000000 pri=75, usrpri=75, nice=20 forw=0xffffffffffffffff, list=0xffff800015957968,0xffffffff825b7af8 process=0xffff8000ffff6a90 user=0xffff800014915000, vmspace=0xfffffd803f012660 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 25647 357879 59010 0 2 0 syz-executor.1 *25647 135232 59010 0 7 0x4000000 syz-executor.1 96889 456550 0 0 3 0x14200 bored sosplice 95944 465448 65302 0 3 0x2 biowait syz-executor.0 59010 71636 65302 0 3 0x82 nanosleep syz-executor.1 65302 216354 69065 0 3 0x82 kqread syz-fuzzer 65302 365359 69065 0 3 0x4000082 nanosleep syz-fuzzer 65302 455819 69065 0 3 0x4000082 thrsleep syz-fuzzer 65302 71482 69065 0 3 0x4000082 thrsleep syz-fuzzer 65302 512589 69065 0 3 0x4000082 thrsleep syz-fuzzer 65302 106534 69065 0 3 0x4000082 thrsleep syz-fuzzer 65302 242137 69065 0 3 0x4000082 thrsleep syz-fuzzer 69065 443992 19229 0 3 0x10008a pause ksh 19229 218177 70133 0 3 0x92 select sshd 66941 244650 1 0 3 0x100083 ttyin getty 70133 62661 1 0 3 0x80 select sshd 59063 203628 27763 73 3 0x100090 kqread syslogd 27763 310179 1 0 3 0x100082 netio syslogd 57397 189883 1 77 2 0x100090 dhclient 26377 41020 1 0 3 0x80 poll dhclient 61586 181369 0 0 2 0x14200 zerothread 66618 122656 0 0 3 0x14200 aiodoned aiodoned 42058 410412 0 0 3 0x14200 syncer update 39983 15337 0 0 3 0x14200 cleaner cleaner 27556 357898 0 0 3 0x14200 reaper reaper 23466 330957 0 0 3 0x14200 pgdaemon pagedaemon 80452 302960 0 0 3 0x14200 bored crynlk 45747 382370 0 0 3 0x14200 bored crypto 84320 145559 0 0 3 0x40014200 acpi0 acpi0 56625 31932 0 0 3 0x14200 bored softnet 56640 344450 0 0 2 0x14200 systqmp 95840 18022 0 0 3 0x14200 bored systq 12640 105233 0 0 3 0x40014200 bored softclock 96170 140766 0 0 3 0x40014200 idle0 50472 334544 0 0 3 0x14200 bored smr 1 424054 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 9470 6331K 6850K 78643K 10977 0 0 pcb 13 8K 8K 78643K 59 0 0 rtable 103 4K 4K 78643K 226 0 0 ifaddr 55 12K 13K 78643K 72 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 21 0 0 iov 0 0K 24K 78643K 28 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1226 77K 77K 78643K 1345 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 4 0 0 VM map 4 1K 1K 78643K 4 0 0 sem 12 0K 0K 78643K 126 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 5 13K 21K 78643K 155 0 0 sigio 0 0K 0K 78643K 2 0 0 proc 48 38K 54K 78643K 383 0 0 subproc 32 2K 2K 78643K 34 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 3 0 0 in_multi 52 2K 3K 78643K 56 0 0 ether_multi 1 0K 0K 78643K 2 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 48 212K 212K 78643K 48 0 0 exec 0 0K 1K 78643K 193 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 103 37K 42K 78643K 1205 0 0 UVM aobj 43 2K 2K 78643K 45 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 27 0 0 NDP 8 0K 0K 78643K 14 0 0 temp 96 3529K 3593K 78643K 3598 0 0 kqueue 0 0K 0K 78643K 4 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 6 0 2 1 0 1 1 0 8 0 rtpcb 96 39 0 37 1 0 1 1 0 8 0 rtentry 112 45 0 5 2 0 2 2 0 8 0 unpcb 120 155 0 147 1 0 1 1 0 8 0 syncache 280 4 0 4 1 1 0 1 0 8 0 tcpqe 32 397 0 397 2 2 0 1 0 8 0 tcpcb 640 190 0 186 2 0 2 2 0 8 1 inpcb 280 325 0 317 2 0 2 2 0 8 1 nd6 48 4 0 0 1 0 1 1 0 8 0 ppxss 1128 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 256 213 0 0 14 0 14 14 0 8 0 art_table 32 214 0 0 2 0 2 2 0 8 0 art_node 16 44 0 4 1 0 1 1 0 8 0 sysvmsgpl 40 4 0 2 1 0 1 1 0 8 0 semupl 112 3 0 3 1 1 0 1 0 8 0 semapl 112 124 0 114 1 0 1 1 0 8 0 shmpl 112 43 0 2 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 1590 0 195 46 0 46 46 0 8 0 ffsino 240 1590 0 195 83 0 83 83 0 8 0 nchpl 144 2006 0 397 60 0 60 60 0 8 0 uvmvnodes 72 1735 0 0 32 0 32 32 0 8 0 vnodes 208 1735 0 0 92 0 92 92 0 8 0 namei 1024 5519 0 5519 1 0 1 1 0 8 1 vcpupl 1984 2 0 0 1 0 1 1 0 8 0 vmpool 520 2 0 0 1 0 1 1 0 8 0 scxspl 208 5752 0 5751 8 3 5 7 0 8 4 plimitpl 152 38 0 31 1 0 1 1 0 8 0 sigapl 432 325 0 312 2 0 2 2 0 8 0 futexpl 56 5231 0 5231 1 0 1 1 0 8 1 knotepl 112 113 0 94 2 0 2 2 0 8 1 kqueuepl 104 42 0 40 1 0 1 1 0 8 0 pipepl 128 410 0 391 2 0 2 2 0 8 1 fdescpl 424 326 0 312 2 0 2 2 0 8 0 filepl 120 2499 0 2403 6 1 5 5 0 8 2 lockfpl 104 39 0 38 1 0 1 1 0 8 0 lockfspl 48 14 0 13 1 0 1 1 0 8 0 sessionpl 128 17 0 7 1 0 1 1 0 8 0 pgrppl 48 21 0 11 1 0 1 1 0 8 0 ucredpl 96 273 0 266 1 0 1 1 0 8 0 zombiepl 144 312 0 312 1 0 1 1 0 8 1 processpl 896 341 0 312 4 0 4 4 0 8 0 procpl 648 521 0 485 4 0 4 4 0 8 0 sosppl 144 2 0 2 1 0 1 1 0 8 1 sockpl 384 525 0 507 5 0 5 5 0 8 3 mcl64k 65536 4 0 4 1 0 1 1 0 8 1 mcl16k 16384 2 0 2 1 1 0 1 0 8 0 mcl12k 12288 4 0 4 1 0 1 1 0 8 1 mcl9k 9216 4 0 4 1 0 1 1 0 8 1 mcl8k 8192 7 0 7 1 0 1 1 0 8 1 mcl4k 4096 23 0 23 2 1 1 1 0 8 1 mcl2k2 2112 2 0 2 2 1 1 1 0 8 1 mcl2k 2048 69759 0 69727 19 14 5 16 0 8 0 mtagpl 80 17 0 15 2 1 1 1 0 8 0 mbufpl 256 111454 0 111373 13 5 8 11 0 8 0 bufpl 256 6591 0 1686 307 0 307 307 0 8 0 anonpl 16 48094 0 28142 84 2 82 82 0 62 1 amapchunkpl 152 1442 0 1297 7 0 7 7 0 158 0 amappl16 192 1764 0 652 57 0 57 57 0 8 1 amappl14 176 45 0 40 1 0 1 1 0 8 0 amappl13 168 65 0 64 1 0 1 1 0 8 0 amappl12 160 9 0 7 2 1 1 1 0 8 0 amappl11 152 105 0 91 1 0 1 1 0 8 0 amappl10 144 10 0 8 1 0 1 1 0 8 0 amappl9 136 563 0 559 1 0 1 1 0 8 0 amappl8 128 146 0 121 1 0 1 1 0 8 0 amappl7 120 33 0 30 1 0 1 1 0 8 0 amappl6 112 117 0 105 1 0 1 1 0 8 0 amappl5 104 143 0 133 1 0 1 1 0 8 0 amappl4 96 596 0 571 1 0 1 1 0 8 0 amappl3 88 119 0 114 1 0 1 1 0 8 0 amappl2 80 1821 0 1755 3 1 2 3 0 8 0 amappl1 72 15415 0 15005 26 16 10 20 0 8 0 amappl 80 744 0 701 2 0 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 18 0 17 1 0 1 1 0 8 0 aobjpl 64 44 0 2 1 0 1 1 0 8 0 uaddrrnd 24 328 0 312 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 328 0 312 1 0 1 1 0 8 0 vmmpekpl 168 6913 0 6887 2 0 2 2 0 8 0 vmmpepl 168 46520 0 44352 141 13 128 136 0 357 33 vmsppl 272 325 0 312 2 1 1 2 0 8 0 pdppl 4096 662 0 626 5 0 5 5 0 8 0 pvpl 32 158802 0 135837 194 0 194 194 0 265 7 pmappl 200 327 0 312 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 455 0 24 13 0 13 13 0 8 0