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 *195194 93008 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(ffff80001794c540) 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(ffff800000aa8600) 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(fffffd8036ff6a80,8020699f,ffff80001794c830,ffff8000ffff27b0) at ifioctl+0x169d sys/net/if.c:2148 sys_ioctl(ffff8000ffff27b0,ffff80001794c948,ffff80001794c990) at sys_ioctl+0x5b9 syscall(ffff80001794ca10) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xecb0a8497f0, 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(ffff80001794c540) 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(ffff800000aa8600) 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(fffffd8036ff6a80,8020699f,ffff80001794c830,ffff8000ffff27b0) at ifioctl+0x169d sys/net/if.c:2148 sys_ioctl(ffff8000ffff27b0,ffff80001794c948,ffff80001794c990) at sys_ioctl+0x5b9 syscall(ffff80001794ca10) at syscall+0x507 sys/arch/amd64/amd64/trap.c:555 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xecb0a8497f0, count: -13 ddb> show registers rdi 0xffffffff815aa087 db_enter+0x17 rsi 0x13e09 __ALIGN_SIZE+0x12e09 rbp 0xffff80001794c3b0 rbx 0xffff80001794c460 rdx 0x13e0a __ALIGN_SIZE+0x12e0a rcx 0xffff800014947000 rax 0xffff800014947000 r8 0xffff80001794c370 r9 0x1 r10 0xffff800000a67640 r11 0xe9f4399c1a14bb41 r12 0x3000000008 r13 0xffff80001794c3c0 r14 0x100 r15 0x1 rip 0xffffffff815aa088 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80001794c3a0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb> show proc PROC (syz-executor.0) pid=195194 stat=onproc flags process=0 proc=4000000 pri=78, usrpri=78, nice=20 forw=0xffffffffffffffff, list=0xffff8000ffff3968,0xffffffff825b7af8 process=0xffff8000ffff7190 user=0xffff800017947000, vmspace=0xfffffd803f012aa0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 93008 225801 84366 0 2 0 syz-executor.0 *93008 195194 84366 0 7 0x4000000 syz-executor.0 32192 342020 76129 0 3 0x2 biowait syz-executor.1 30097 97131 0 0 3 0x14200 bored sosplice 84366 15161 76129 0 3 0x82 nanosleep syz-executor.0 76129 130469 5680 0 3 0x82 thrsleep syz-fuzzer 76129 167693 5680 0 3 0x4000082 thrsleep syz-fuzzer 76129 515001 5680 0 3 0x4000082 thrsleep syz-fuzzer 76129 224840 5680 0 3 0x4000082 thrsleep syz-fuzzer 76129 512082 5680 0 3 0x4000082 thrsleep syz-fuzzer 76129 106410 5680 0 3 0x4000082 kqread syz-fuzzer 76129 8372 5680 0 3 0x4000082 thrsleep syz-fuzzer 76129 264103 5680 0 3 0x4000082 thrsleep syz-fuzzer 5680 72519 50449 0 3 0x10008a pause ksh 50449 180633 85585 0 3 0x92 select sshd 68035 82983 1 0 3 0x100083 ttyin getty 85585 311663 1 0 3 0x80 select sshd 74865 148583 47506 73 3 0x100090 kqread syslogd 47506 77284 1 0 3 0x100082 netio syslogd 45549 287656 1 77 2 0x100090 dhclient 44743 153766 1 0 3 0x80 poll dhclient 34571 229738 0 0 2 0x14200 zerothread 21476 377538 0 0 3 0x14200 aiodoned aiodoned 20794 166624 0 0 3 0x14200 syncer update 21847 503340 0 0 3 0x14200 cleaner cleaner 52973 260433 0 0 3 0x14200 reaper reaper 51598 399918 0 0 3 0x14200 pgdaemon pagedaemon 13687 81034 0 0 3 0x14200 bored crynlk 52803 335648 0 0 3 0x14200 bored crypto 16027 293850 0 0 3 0x40014200 acpi0 acpi0 88092 61488 0 0 3 0x14200 bored softnet 59578 61301 0 0 2 0x14200 systqmp 30606 2683 0 0 3 0x14200 bored systq 61521 286792 0 0 3 0x40014200 bored softclock 53931 182579 0 0 3 0x40014200 idle0 15638 478306 0 0 3 0x14200 bored smr 1 444450 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 9517 7002K 7714K 78643K 11802 0 0 pcb 13 8K 8K 78643K 140 0 0 rtable 104 4K 4K 78643K 481 0 0 ifaddr 78 14K 14K 78643K 181 0 0 counters 19 16K 16K 78643K 19 0 0 ioctlops 0 0K 2K 78643K 33 0 0 iov 0 0K 24K 78643K 170 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1225 77K 77K 78643K 1628 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 11 0 0 VM map 6 1K 1K 78643K 6 0 0 sem 12 0K 1K 78643K 111 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1794 195K 288K 78643K 12646 0 0 file desc 5 13K 25K 78643K 506 0 0 sigio 0 0K 0K 78643K 6 0 0 proc 48 38K 62K 78643K 510 0 0 subproc 32 2K 2K 78643K 72 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 41 0 0 in_multi 50 2K 3K 78643K 81 0 0 ether_multi 1 0K 0K 78643K 3 0 0 mrt 0 0K 0K 78643K 4 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 60 265K 265K 78643K 60 0 0 exec 0 0K 1K 78643K 262 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 111 54K 54K 78643K 2108 0 0 UVM aobj 41 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 111 0 0 NDP 14 0K 0K 78643K 40 0 0 temp 142 3539K 4177K 78643K 33154 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 17 0 13 1 0 1 1 0 8 0 rtpcb 96 87 0 85 1 0 1 1 0 8 0 rtentry 112 85 0 46 2 0 2 2 0 8 0 unpcb 120 1277 0 1269 4 2 2 3 0 8 1 syncache 280 10 0 10 3 3 0 1 0 8 0 tcpqe 32 186 0 186 2 2 0 1 0 8 0 tcpcb 640 190 0 186 1 0 1 1 0 8 0 ipq 40 3 0 3 2 1 1 1 0 8 1 ipqe 40 92 0 92 2 1 1 1 0 8 1 inpcb 280 588 0 580 2 0 2 2 0 8 1 nd6 48 9 0 6 1 0 1 1 0 8 0 pkpcb 40 2 0 2 1 0 1 1 0 8 1 ppxss 1128 8 0 8 2 2 0 1 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 360 0 150 16 1 15 15 0 8 1 art_table 32 362 0 150 2 0 2 2 0 8 0 art_node 16 84 0 43 1 0 1 1 0 8 0 sysvmsgpl 40 21 0 16 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 106 0 96 1 0 1 1 0 8 0 shmpl 112 43 0 4 2 0 2 2 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 2170 0 772 46 0 46 46 0 8 0 ffsino 240 2170 0 772 83 0 83 83 0 8 0 nchpl 144 3237 0 1639 60 0 60 60 0 8 0 uvmvnodes 72 2514 0 0 46 0 46 46 0 8 0 vnodes 208 2514 0 0 133 0 133 133 0 8 0 namei 1024 9511 0 9511 1 0 1 1 0 8 1 vcpupl 1984 4 0 0 1 0 1 1 0 8 0 vmpool 520 4 0 0 1 0 1 1 0 8 0 scxspl 208 11025 0 11024 9 7 2 7 0 8 1 plimitpl 152 64 0 57 1 0 1 1 0 8 0 sigapl 432 670 0 657 2 0 2 2 0 8 0 futexpl 56 13266 0 13266 1 0 1 1 0 8 1 knotepl 112 119 0 100 1 0 1 1 0 8 0 kqueuepl 104 153 0 151 1 0 1 1 0 8 0 pipepl 128 400 0 381 2 1 1 2 0 8 0 fdescpl 424 671 0 657 2 0 2 2 0 8 0 filepl 120 5991 0 5895 8 3 5 7 0 8 2 lockfpl 104 239 0 238 1 0 1 1 0 8 0 lockfspl 48 85 0 84 1 0 1 1 0 8 0 sessionpl 128 19 0 9 1 0 1 1 0 8 0 pgrppl 48 23 0 13 1 0 1 1 0 8 0 ucredpl 96 508 0 501 1 0 1 1 0 8 0 zombiepl 144 657 0 657 1 0 1 1 0 8 1 processpl 896 686 0 657 4 0 4 4 0 8 0 procpl 648 1305 0 1268 4 0 4 4 0 8 0 sosppl 144 8 0 8 2 2 0 1 0 8 0 sockpl 384 1969 0 1951 14 7 7 11 0 8 5 mcl64k 65536 82 0 82 1 0 1 1 0 8 1 mcl16k 16384 7 0 7 2 1 1 1 0 8 1 mcl12k 12288 29 0 29 1 0 1 1 0 8 1 mcl9k 9216 10 0 10 2 1 1 1 0 8 1 mcl8k 8192 15 0 15 2 1 1 1 0 8 1 mcl4k 4096 65 0 65 2 1 1 1 0 8 1 mcl2k2 2112 2 0 2 2 2 0 1 0 8 0 mcl2k 2048 70950 0 70920 15 10 5 12 0 8 1 mtagpl 80 55 0 45 2 1 1 1 0 8 0 mbufpl 256 117925 0 117799 33 13 20 23 0 8 8 bufpl 256 8059 0 3153 307 0 307 307 0 8 0 anonpl 16 105129 0 86762 100 10 90 98 0 62 6 amapchunkpl 152 3836 0 3688 22 11 11 20 0 158 3 amappl16 192 4373 0 3213 81 19 62 70 0 8 3 amappl15 184 206 0 204 1 0 1 1 0 8 0 amappl14 176 64 0 59 1 0 1 1 0 8 0 amappl13 168 1 0 1 1 1 0 1 0 8 0 amappl12 160 7 0 6 1 0 1 1 0 8 0 amappl11 152 265 0 253 1 0 1 1 0 8 0 amappl10 144 9 0 8 1 0 1 1 0 8 0 amappl9 136 609 0 605 1 0 1 1 0 8 0 amappl8 128 202 0 175 2 0 2 2 0 8 0 amappl7 120 52 0 44 1 0 1 1 0 8 0 amappl6 112 273 0 262 1 0 1 1 0 8 0 amappl5 104 168 0 157 1 0 1 1 0 8 0 amappl4 96 889 0 861 1 0 1 1 0 8 0 amappl3 88 141 0 135 1 0 1 1 0 8 0 amappl2 80 4663 0 4596 3 1 2 3 0 8 0 amappl1 72 21689 0 21287 27 18 9 20 0 8 0 amappl 80 1572 0 1527 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 4 1 0 1 1 0 8 0 uaddrrnd 24 675 0 657 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 675 0 657 1 0 1 1 0 8 0 vmmpekpl 168 8751 0 8725 2 0 2 2 0 8 0 vmmpepl 168 91403 0 89184 186 37 149 180 0 357 48 vmsppl 272 670 0 657 2 1 1 2 0 8 0 pdppl 4096 1356 0 1318 6 1 5 6 0 8 0 pvpl 32 288760 0 267331 229 19 210 229 0 265 18 pmappl 200 674 0 657 1 0 1 1 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 477 0 31 13 0 13 13 0 8 0