b+:m~a4.D}d] GP6:Rȿfq$X;QkaNb+:m~a4.D}d] GP6:Rȿfq$X;QkaNpanic: attempt to execute user address 0x0 in supervisor mode Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND * 41046 74183 0 0 0x4000000 0K syz-executor.0 202102 84087 0 0x2 0x4000000 1 syz-fuzzer 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(ffff80002277ad20) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800020d50000,fffffd807d75c0e8,10,ffff80000005b650,ffff80002277af88) at alltraps_kern_meltdown+0x7b 0(b,ffff80002277aee8,83,ffff80002277af88,0,b) at 0 rt_clone(ffff80002277aff8,fffffd806f6d45f8,0) at rt_clone+0x78 sys/net/route.c:266 rtalloc_mpath(fffffd806f6d45f8,0,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] rtalloc_mpath(fffffd806f6d45f8,0,0) at rtalloc_mpath+0xba sys/net/route.c:359 in_pcbselsrc(ffff80002277b0d0,fffffd8066278520,fffffd806f6d4578) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934 in_pcbconnect(fffffd806f6d4578,fffffd8066278500) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492 udp_usrreq(fffffd8066b9b7a8,4,0,fffffd8066278500,0,ffff800020a5f8b8) at udp_usrreq+0x560 sys_connect(ffff800020a5f8b8,ffff80002277b258,ffff80002277b2a0) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388 syscall(ffff80002277b320) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff80002277b320) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,fffffffffffffecf,0,3,4e19b3ac010) at Xsyscall+0x128 end of kernel end trace frame: 0x4e405213990, 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(ffff80002277ad20) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800020d50000,fffffd807d75c0e8,10,ffff80000005b650,ffff80002277af88) at alltraps_kern_meltdown+0x7b 0(b,ffff80002277aee8,83,ffff80002277af88,0,b) at 0 rt_clone(ffff80002277aff8,fffffd806f6d45f8,0) at rt_clone+0x78 sys/net/route.c:266 rtalloc_mpath(fffffd806f6d45f8,0,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] rtalloc_mpath(fffffd806f6d45f8,0,0) at rtalloc_mpath+0xba sys/net/route.c:359 in_pcbselsrc(ffff80002277b0d0,fffffd8066278520,fffffd806f6d4578) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934 in_pcbconnect(fffffd806f6d4578,fffffd8066278500) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492 udp_usrreq(fffffd8066b9b7a8,4,0,fffffd8066278500,0,ffff800020a5f8b8) at udp_usrreq+0x560 sys_connect(ffff800020a5f8b8,ffff80002277b258,ffff80002277b2a0) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388 syscall(ffff80002277b320) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff80002277b320) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,fffffffffffffecf,0,3,4e19b3ac010) at Xsyscall+0x128 end of kernel end trace frame: 0x4e405213990, count: -14 ddb{0}> show registers rdi 0xffffffff81e07517 db_enter+0x17 rsi 0x2af5 __ALIGN_SIZE+0x1af5 rbp 0xffff80002277ab90 rbx 0xffff80002277ac40 rdx 0x2af6 __ALIGN_SIZE+0x1af6 rcx 0xffff800020d50000 rax 0xffff800020d50000 r8 0xffffffff817fb7bf kprintf+0x16f r9 0x1 r10 0x25 r11 0xd6df098cd8d61c9e r12 0x3000000008 r13 0xffff80002277aba0 r14 0x100 r15 0x1 rip 0xffffffff81e07518 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff80002277ab80 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=41046 stat=onproc flags process=0 proc=4000000 pri=80, usrpri=80, nice=20 forw=0xffffffffffffffff, list=0xffff800020ac09f0,0xffffffff826286b0 process=0xffff800020adc000 user=0xffff800022776000, vmspace=0xfffffd807f00a5c0 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 74183 291413 68272 0 2 0 syz-executor.0 *74183 41046 68272 0 7 0x4000000 syz-executor.0 82777 80289 84087 0 2 0x2 syz-executor.1 59113 491420 0 0 3 0x14200 acct acct 68272 441085 84087 0 3 0x82 nanosleep syz-executor.0 2260 124649 1 0 3 0x100083 ttyin getty 77331 49876 0 0 3 0x14200 bored sosplice 84087 318304 46220 0 3 0x82 thrsleep syz-fuzzer 84087 200862 46220 0 3 0x4000082 nanosleep syz-fuzzer 84087 180843 46220 0 3 0x4000082 thrsleep syz-fuzzer 84087 518133 46220 0 3 0x4000082 nanosleep syz-fuzzer 84087 310658 46220 0 3 0x4000082 thrsleep syz-fuzzer 84087 202102 46220 0 7 0x4000002 syz-fuzzer 84087 78650 46220 0 3 0x4000082 thrsleep syz-fuzzer 84087 133581 46220 0 3 0x4000082 thrsleep syz-fuzzer 84087 325158 46220 0 3 0x4000082 thrsleep syz-fuzzer 84087 19326 46220 0 3 0x4000082 thrsleep syz-fuzzer 46220 327517 89039 0 3 0x10008a pause ksh 89039 381665 4832 0 3 0x92 select sshd 4832 464945 1 0 3 0x80 select sshd 69178 466496 77934 74 3 0x100092 bpf pflogd 77934 425831 1 0 3 0x80 netio pflogd 24441 215451 28676 73 3 0x100090 kqread syslogd 28676 415411 1 0 3 0x100082 netio syslogd 14605 385158 1 77 3 0x100090 poll dhclient 57846 512320 1 0 3 0x80 poll dhclient 20554 455453 0 0 2 0x14200 zerothread 1677 495977 0 0 3 0x14200 aiodoned aiodoned 39905 140223 0 0 3 0x14200 syncer update 51117 201699 0 0 3 0x14200 cleaner cleaner 70820 244775 0 0 3 0x14200 reaper reaper 23233 13746 0 0 3 0x14200 pgdaemon pagedaemon 54417 258133 0 0 3 0x14200 bored crynlk 89883 113124 0 0 3 0x14200 bored crypto 19289 37292 0 0 3 0x40014200 acpi0 acpi0 76108 461433 0 0 3 0x40014200 idle1 91557 82923 0 0 3 0x14200 bored softnet 35256 124325 0 0 3 0x14200 bored systqmp 16634 436825 0 0 3 0x14200 bored systq 88670 374478 0 0 2 0x40014200 softclock 50027 62112 0 0 3 0x40014200 idle0 35373 325687 0 0 3 0x14200 bored smr 1 500289 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 74183 (syz-executor.0) thread 0xffff800020a5f8b8 (41046) exclusive rwlock netlock r = 0 (0xffffffff82485b08) #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 (0xffffffff826408b0) #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 9621 6535K 8761K 78643K 51400 0 0 pcb 13 12K 14K 78643K 1424 0 0 rtable 121 13K 15K 78643K 4686 0 0 ifaddr 119 31K 33K 78643K 1374 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1867 0 0 iov 0 0K 32K 78643K 1624 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1229 77K 78K 78643K 12673 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 103 0 0 VM map 2 1K 1K 78643K 33 0 0 sem 12 0K 0K 78643K 1078 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 5 13K 25K 78643K 7212 0 0 sigio 0 0K 0K 78643K 70 0 0 proc 62 63K 95K 78643K 2909 0 0 subproc 32 2K 2K 78643K 703 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 500 0 0 in_multi 32 2K 2K 78643K 808 0 0 ether_multi 1 0K 0K 78643K 34 0 0 mrt 0 0K 0K 78643K 44 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 1443 0 0 pfkey data 0 0K 4K 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 140 24K 32K 78643K 25936 0 0 UVM aobj 130 9K 9K 78643K 151 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 1399 0 0 NDP 23 0K 1K 78643K 435 0 0 temp 249 3557K 4197K 78643K 170937 0 0 kqueue 0 0K 0K 78643K 46 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 64 173 0 166 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 513 0 511 1 0 1 1 0 8 0 rtentry 112 815 0 772 2 0 2 2 0 8 0 unpcb 120 4662 0 4646 18 16 2 2 0 8 1 syncache 264 28 0 28 11 11 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 7111 0 7111 2 2 0 2 0 8 0 tcpcb 544 7423 0 7418 20 19 1 12 0 8 0 inpcb 280 13963 0 13953 38 35 3 13 0 8 2 rttmr 72 13 0 12 5 4 1 1 0 8 0 nd6 48 112 0 109 3 2 1 1 0 8 0 pkpcb 40 18 0 18 8 7 1 1 0 8 1 swfcl 56 4 0 0 1 0 1 1 0 8 0 ppxss 1128 194 0 194 18 17 1 1 0 8 1 pffrag 232 99 0 99 22 21 1 1 0 482 1 pffrnode 88 99 0 99 22 21 1 1 0 8 1 pffrent 40 230 0 230 22 21 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 24 463 0 409 1 0 1 1 0 8 0 pfstkey 112 463 0 409 3 0 3 3 0 8 0 pfstate 328 463 0 409 8 1 7 7 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 13 0 12 7 6 1 3 0 8 0 art_heap4 256 3298 0 3035 37 18 19 19 0 8 0 art_table 32 3311 0 3047 3 0 3 3 0 8 0 art_node 16 808 0 769 1 0 1 1 0 8 0 sysvmsgpl 40 64 0 32 1 0 1 1 0 8 0 semapl 112 1076 0 1066 1 0 1 1 0 8 0 shmpl 112 149 0 21 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 12185 0 10752 47 0 47 47 0 8 0 ffsino 272 12185 0 10752 97 1 96 96 0 8 0 nchpl 144 23184 0 22688 61 40 21 61 0 8 0 uvmvnodes 72 6665 0 0 122 0 122 122 0 8 0 vnodes 208 6665 0 0 351 0 351 351 0 8 0 namei 1024 90009 0 90009 4 3 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 31 0 31 12 12 0 1 0 8 0 scsiplug 64 8 0 8 5 5 0 1 0 8 0 scxspl 192 73044 0 73044 55 54 1 7 0 8 1 plimitpl 152 721 0 713 1 0 1 1 0 8 0 sigapl 432 7298 0 7283 4 2 2 3 0 8 0 futexpl 56 170195 0 170195 2 1 1 1 0 8 1 knotepl 112 1971 0 1952 10 9 1 3 0 8 0 kqueuepl 104 1842 0 1840 4 3 1 4 0 8 0 pipepl 112 7578 0 7559 24 22 2 2 0 8 1 fdescpl 488 7299 0 7283 3 0 3 3 0 8 0 filepl 152 66338 0 66236 58 51 7 14 0 8 3 lockfpl 104 2736 0 2735 1 0 1 1 0 8 0 lockfspl 48 865 0 864 1 0 1 1 0 8 0 sessionpl 112 60 0 49 1 0 1 1 0 8 0 pgrppl 48 129 0 118 1 0 1 1 0 8 0 ucredpl 96 6989 0 6980 1 0 1 1 0 8 0 zombiepl 144 7287 0 7287 3 2 1 1 0 8 1 processpl 896 7320 0 7287 4 0 4 4 0 8 0 procpl 632 23151 0 23108 7 2 5 5 0 8 1 srpgc 64 61 0 61 19 18 1 1 0 8 1 sosppl 128 745 0 744 16 15 1 1 0 8 0 sockpl 384 19207 0 19181 102 93 9 22 0 8 5 mcl64k 65536 531 0 0 66 25 41 66 0 8 1 mcl16k 16384 33 0 0 5 2 3 3 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 17 0 0 3 0 3 3 0 8 0 mcl4k 4096 25 0 0 4 1 3 3 0 8 0 mcl2k2 2112 11 0 0 1 0 1 1 0 8 0 mcl2k 2048 198 0 0 22 4 18 22 0 8 0 mtagpl 80 88 0 0 1 0 1 1 0 8 0 mbufpl 256 734 0 0 38 0 38 38 0 8 0 bufpl 256 28216 0 21168 441 0 441 441 0 8 0 anonpl 16 795298 0 780162 212 143 69 85 0 124 0 amapchunkpl 152 50966 0 50856 79 73 6 19 0 158 0 amappl16 192 37468 0 36522 225 176 49 62 0 8 0 amappl15 184 97 0 97 2 2 0 1 0 8 0 amappl14 176 1447 0 1445 2 1 1 1 0 8 0 amappl13 168 992 0 989 5 4 1 1 0 8 0 amappl12 160 1081 0 1080 6 5 1 1 0 8 0 amappl11 152 1272 0 1256 1 0 1 1 0 8 0 amappl10 144 633 0 627 1 0 1 1 0 8 0 amappl9 136 2819 0 2812 1 0 1 1 0 8 0 amappl8 128 2350 0 2303 3 1 2 2 0 8 0 amappl7 120 740 0 732 1 0 1 1 0 8 0 amappl6 112 1194 0 1180 1 0 1 1 0 8 0 amappl5 104 1582 0 1568 1 0 1 1 0 8 0 amappl4 96 7773 0 7736 1 0 1 1 0 8 0 amappl3 88 1708 0 1703 1 0 1 1 0 8 0 amappl2 80 55370 0 55295 4 2 2 3 0 8 0 amappl1 72 172501 0 172063 25 15 10 20 0 8 0 amappl 80 24096 0 24058 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 17 0 17 1 1 0 1 0 8 0 aobjpl 64 150 0 21 3 0 3 3 0 8 0 uaddrrnd 24 7330 0 7283 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 7330 0 7283 1 0 1 1 0 8 0 vmmpekpl 168 68404 0 68369 2 0 2 2 0 8 0 vmmpepl 168 919265 0 917154 354 224 130 130 0 357 27 vmsppl 368 7298 0 7283 2 0 2 2 0 8 0 pdppl 4096 14667 0 14628 8 2 6 6 0 8 0 pvpl 32 2085483 0 2067070 435 259 176 206 0 265 10 pmappl 232 7329 0 7314 15 14 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 761 0 84 20 0 20 20 0 8 0