""‰~¼t§êÏ€ñúHôD^Õpanic: attempt to execute user address 0x0 in supervisor mode Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 216233 7796 0 0 0 1 syz-executor.1 *248265 7796 0 0 0x4000000 0K 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+0x40b kerntrap(ffff8000239bd8a0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800022f92000,fffffd80623a81d0,10,ffff80000005b410,ffff8000239bdb08) at alltraps_kern_meltdown+0x7b 0(b,ffff8000239bda68,83,ffff8000239bdb08,0,b) at 0 rt_clone(ffff8000239bdb78,fffffd806f6d3080,0) at rt_clone+0x78 sys/net/route.c:266 rtalloc_mpath(fffffd806f6d3080,0,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] rtalloc_mpath(fffffd806f6d3080,0,0) at rtalloc_mpath+0xba sys/net/route.c:359 in_pcbselsrc(ffff8000239bdc50,fffffd807131f220,fffffd806f6d3000) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934 in_pcbconnect(fffffd806f6d3000,fffffd807131f200) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492 udp_usrreq(fffffd8063f55c90,4,0,fffffd807131f200,0,ffff800020acfb48) at udp_usrreq+0x560 sys_connect(ffff800020acfb48,ffff8000239bddd8,ffff8000239bde20) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388 syscall(ffff8000239bdea0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff8000239bdea0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,fffffffffffffed2,0,3,d20789a70e0) at Xsyscall+0x128 end of kernel end trace frame: 0xd22a9ebe210, count: 1 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic attempt to execute user address 0x0 in supervisor mode ddb{0}> 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+0x40b kerntrap(ffff8000239bd8a0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800022f92000,fffffd80623a81d0,10,ffff80000005b410,ffff8000239bdb08) at alltraps_kern_meltdown+0x7b 0(b,ffff8000239bda68,83,ffff8000239bdb08,0,b) at 0 rt_clone(ffff8000239bdb78,fffffd806f6d3080,0) at rt_clone+0x78 sys/net/route.c:266 rtalloc_mpath(fffffd806f6d3080,0,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] rtalloc_mpath(fffffd806f6d3080,0,0) at rtalloc_mpath+0xba sys/net/route.c:359 in_pcbselsrc(ffff8000239bdc50,fffffd807131f220,fffffd806f6d3000) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934 in_pcbconnect(fffffd806f6d3000,fffffd807131f200) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492 udp_usrreq(fffffd8063f55c90,4,0,fffffd807131f200,0,ffff800020acfb48) at udp_usrreq+0x560 sys_connect(ffff800020acfb48,ffff8000239bddd8,ffff8000239bde20) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388 syscall(ffff8000239bdea0) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff8000239bdea0) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,fffffffffffffed2,0,3,d20789a70e0) at Xsyscall+0x128 end of kernel end trace frame: 0xd22a9ebe210, count: -14 ddb{0}> show registers rdi 0xffffffff814c4807 db_enter+0x17 rsi 0x218f __ALIGN_SIZE+0x118f rbp 0xffff8000239bd710 rbx 0xffff8000239bd7c0 rdx 0x2190 __ALIGN_SIZE+0x1190 rcx 0xffff800022f92000 rax 0xffff800022f92000 r8 0xffffffff8141f94f kprintf+0x16f r9 0x1 r10 0x25 r11 0x13a98f2678087a80 r12 0x3000000008 r13 0xffff8000239bd720 r14 0x100 r15 0x1 rip 0xffffffff814c4808 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000239bd700 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=248265 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020acf658,0xffffffff8265b7c8 process=0xffff800020addc00 user=0xffff8000239b8000, vmspace=0xfffffd807f00a730 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 7796 216233 13587 0 7 0 syz-executor.1 7796 87041 13587 0 3 0x4000080 netcon syz-executor.1 * 7796 248265 13587 0 7 0x4000000 syz-executor.1 93969 472915 72113 0 3 0x82 nanosleep syz-executor.0 13587 13275 72113 0 3 0x82 nanosleep syz-executor.1 88794 175021 1 0 3 0x100083 ttyin getty 580 504821 0 0 3 0x14200 acct acct 30823 173503 0 0 3 0x14200 bored sosplice 72113 406079 41132 0 3 0x82 thrsleep syz-fuzzer 72113 45640 41132 0 3 0x4000082 nanosleep syz-fuzzer 72113 234977 41132 0 3 0x4000082 thrsleep syz-fuzzer 72113 38444 41132 0 3 0x4000082 thrsleep syz-fuzzer 72113 175140 41132 0 3 0x4000082 thrsleep syz-fuzzer 72113 431869 41132 0 3 0x4000082 thrsleep syz-fuzzer 72113 488961 41132 0 3 0x4000082 thrsleep syz-fuzzer 72113 446534 41132 0 3 0x4000082 kqread syz-fuzzer 72113 122609 41132 0 3 0x4000082 thrsleep syz-fuzzer 72113 238961 41132 0 3 0x4000082 thrsleep syz-fuzzer 41132 86756 66024 0 3 0x10008a pause ksh 66024 27948 12175 0 3 0x92 select sshd 12175 70025 1 0 3 0x80 select sshd 8621 266968 58167 74 3 0x100092 bpf pflogd 58167 200948 1 0 3 0x80 netio pflogd 72648 473275 26963 73 3 0x100090 kqread syslogd 26963 369213 1 0 3 0x100082 netio syslogd 63473 498704 1 77 3 0x100090 poll dhclient 85452 474312 1 0 3 0x80 poll dhclient 80377 257891 0 0 3 0x14200 pgzero zerothread 94837 494822 0 0 3 0x14200 aiodoned aiodoned 29135 367863 0 0 3 0x14200 syncer update 39838 423033 0 0 3 0x14200 cleaner cleaner 38140 118747 0 0 3 0x14200 reaper reaper 35207 4153 0 0 3 0x14200 pgdaemon pagedaemon 16817 512624 0 0 3 0x14200 bored crynlk 30702 286397 0 0 3 0x14200 bored crypto 21394 507350 0 0 3 0x40014200 acpi0 acpi0 91201 279555 0 0 3 0x40014200 idle1 91575 517298 0 0 3 0x14200 bored softnet 54742 72481 0 0 3 0x14200 bored systqmp 44209 275045 0 0 3 0x14200 bored systq 68957 30275 0 0 3 0x40014200 bored softclock 54393 293857 0 0 3 0x40014200 idle0 86205 429690 0 0 3 0x14200 bored smr 1 29737 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 7796 (syz-executor.1) thread 0xffff800020acfb48 (248265) exclusive rwlock netlock r = 0 (0xffffffff824dc718) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 uvn_io+0x3b2 sys/uvm/uvm_vnode.c:1206 #2 uvn_get+0x226 sys/uvm/uvm_vnode.c:1049 #3 uvm_fault+0x11cc sys/uvm/uvm_fault.c:1023 #4 pageflttrap+0x20b sys/arch/amd64/amd64/trap.c:199 #5 kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 #6 alltraps_kern_meltdown+0x7b #7 copyin+0x4b #8 sys_connect+0x9c sys/kern/uipc_syscalls.c:367 #9 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #9 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #10 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 2 (0xffffffff82648ec0) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 syscall+0x400 mi_syscall sys/sys/syscall_mi.h:83 [inline] #1 syscall+0x400 sys/arch/amd64/amd64/trap.c:555 #2 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9639 6648K 8629K 78643K 31021 0 0 pcb 13 12K 14K 78643K 1958 0 0 rtable 185 18K 18K 78643K 5692 0 0 ifaddr 119 30K 31K 78643K 1643 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 2028 0 0 iov 0 0K 28K 78643K 1822 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1225 77K 78K 78643K 8890 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 114 0 0 VM map 73 36K 36K 78643K 115 0 0 sem 12 0K 0K 78643K 2173 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 5 13K 25K 78643K 8551 0 0 sigio 1 0K 0K 78643K 148 0 0 proc 62 63K 103K 78643K 3655 0 0 subproc 32 2K 2K 78643K 901 0 0 NFS srvsock 1 0K 0K 78643K 1 0 0 NFS daemon 1 16K 16K 78643K 1 0 0 ip_moptions 0 0K 1K 78643K 758 0 0 in_multi 37 2K 3K 78643K 1116 0 0 ether_multi 1 0K 0K 78643K 102 0 0 mrt 2 0K 0K 78643K 63 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 102 450K 450K 78643K 102 0 0 exec 0 0K 1K 78643K 1820 0 0 pfkey data 0 0K 0K 78643K 4 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 261 592K 594K 78643K 38619 0 0 UVM aobj 130 4K 4K 78643K 138 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 1824 0 0 NDP 24 0K 1K 78643K 528 0 0 temp 256 3561K 4201K 78643K 270863 0 0 kqueue 0 0K 0K 78643K 52 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 177 0 171 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 803 0 801 1 0 1 1 0 8 0 rtentry 112 1028 0 954 3 0 3 3 0 8 0 unpcb 120 5409 0 5391 20 19 1 2 0 8 0 syncache 264 54 0 54 28 28 0 1 0 8 0 tcpqe 32 140 0 140 14 14 0 1 0 8 0 tcpcb 544 17373 0 17368 90 89 1 12 0 8 0 ipq 40 1 0 1 1 1 0 1 0 8 0 ipqe 40 2 0 2 1 1 0 1 0 8 0 inpcb 280 26550 0 26541 95 93 2 13 0 8 1 rttmr 72 19 0 19 8 8 0 1 0 8 0 ip6q 72 3 0 2 2 1 1 1 0 8 0 ip6af 40 7 0 6 2 1 1 1 0 8 0 nd6 48 147 0 145 11 10 1 1 0 8 0 pkpcb 40 31 0 31 17 17 0 1 0 8 0 swfcl 56 6 0 0 1 0 1 1 0 8 0 ppxss 1128 234 0 234 85 85 0 1 0 8 0 pffrag 232 231 0 231 79 78 1 1 0 482 1 pffrnode 88 231 0 231 79 78 1 1 0 8 1 pffrent 40 7589 0 7589 79 78 1 1 0 8 1 pfosfp 40 846 0 423 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 732 0 697 1 0 1 1 0 8 0 pfstkey 112 732 0 697 2 0 2 2 0 8 0 pfstate 328 732 0 697 9 5 4 5 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 29 0 21 24 16 8 9 0 8 0 art_heap4 256 4289 0 4009 51 31 20 21 0 8 0 art_table 32 4318 0 4030 5 2 3 3 0 8 0 art_node 16 1018 0 961 1 0 1 1 0 8 0 sysvmsgpl 40 57 0 32 1 0 1 1 0 8 0 semapl 112 2167 0 2157 1 0 1 1 0 8 0 shmpl 112 136 0 8 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 14344 0 12920 48 1 47 47 0 8 0 ffsino 272 14344 0 12920 98 2 96 96 0 8 0 nchpl 144 27037 0 26553 60 41 19 60 0 8 0 uvmvnodes 72 5926 0 0 108 0 108 108 0 8 0 vnodes 208 5926 0 0 312 0 312 312 0 8 0 namei 1024 94325 0 94325 8 7 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 73 0 2 9 0 9 9 0 8 0 vmpool 552 113 0 42 9 3 6 6 0 8 0 scsiplug 64 8 0 8 6 6 0 1 0 8 0 scxspl 192 91105 0 91105 96 95 1 7 0 8 1 plimitpl 152 727 0 719 1 0 1 1 0 8 0 sigapl 432 8606 0 8591 4 2 2 3 0 8 0 futexpl 56 220169 0 220169 4 3 1 1 0 8 1 knotepl 112 1878 0 1859 10 9 1 3 0 8 0 kqueuepl 104 2592 0 2590 7 6 1 4 0 8 0 pipepl 112 5206 0 5187 11 10 1 2 0 8 0 fdescpl 488 8607 0 8591 3 0 3 3 0 8 0 filepl 152 88384 0 88280 124 118 6 14 0 8 1 lockfpl 104 2885 0 2884 1 0 1 1 0 8 0 lockfspl 48 1001 0 1000 1 0 1 1 0 8 0 sessionpl 112 79 0 68 1 0 1 1 0 8 0 pgrppl 48 215 0 204 1 0 1 1 0 8 0 ucredpl 96 8822 0 8813 1 0 1 1 0 8 0 zombiepl 144 8591 0 8590 5 4 1 1 0 8 0 processpl 896 8624 0 8590 5 1 4 5 0 8 0 procpl 632 34928 0 34883 6 1 5 6 0 8 0 srpgc 64 76 0 76 31 31 0 1 0 8 0 sosppl 128 251 0 251 54 54 0 1 0 8 0 sockpl 384 32904 0 32875 198 193 5 23 0 8 1 mcl64k 65536 778 0 0 86 46 40 66 0 8 2 mcl16k 16384 38 0 0 4 2 2 3 0 8 0 mcl12k 12288 65 0 0 2 0 2 2 0 8 0 mcl9k 9216 25 0 0 2 0 2 2 0 8 0 mcl8k 8192 33 0 0 5 2 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 251 0 0 25 10 15 25 0 8 0 mtagpl 80 151 0 0 1 0 1 1 0 8 0 mbufpl 256 2012 0 0 56 9 47 47 0 8 0 bufpl 256 33488 0 26430 442 0 442 442 0 8 0 anonpl 16 1095825 0 1071804 429 314 115 128 0 124 0 amapchunkpl 152 83359 0 82931 242 223 19 32 0 158 0 amappl16 192 46087 0 44755 409 338 71 79 0 8 2 amappl15 184 2425 0 2425 9 8 1 1 0 8 1 amappl14 176 1971 0 1965 1 0 1 1 0 8 0 amappl13 168 285 0 284 4 3 1 1 0 8 0 amappl12 160 628 0 624 2 1 1 1 0 8 0 amappl11 152 1257 0 1241 1 0 1 1 0 8 0 amappl10 144 932 0 925 1 0 1 1 0 8 0 amappl9 136 2320 0 2314 1 0 1 1 0 8 0 amappl8 128 1938 0 1860 3 0 3 3 0 8 0 amappl7 120 1176 0 1167 1 0 1 1 0 8 0 amappl6 112 1157 0 1142 1 0 1 1 0 8 0 amappl5 104 1210 0 1195 1 0 1 1 0 8 0 amappl4 96 8421 0 8381 7 5 2 2 0 8 0 amappl3 88 1990 0 1983 1 0 1 1 0 8 0 amappl2 80 66890 0 66803 5 3 2 3 0 8 0 amappl1 72 216283 0 215832 26 16 10 20 0 8 0 amappl 80 36208 0 36122 4 1 3 3 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 64 137 0 8 3 0 3 3 0 8 0 uaddrrnd 24 8720 0 8591 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 8720 0 8591 1 0 1 1 0 8 0 vmmpekpl 168 85179 0 85131 3 0 3 3 0 8 0 vmmpepl 168 1133105 0 1130346 1243 1069 174 174 0 357 42 vmsppl 368 8606 0 8591 2 0 2 2 0 8 0 pdppl 4096 17447 0 17337 27 12 15 15 0 8 0 pvpl 32 2843059 0 2822970 884 681 203 244 0 265 0 pmappl 232 8719 0 8633 9 3 6 6 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 928 0 229 21 0 21 21 0 8 0