login: panic: attempt to execute user address 0x0 in supervisor mode Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND 369255 36482 0 0 0 1 syz-executor.0 *121763 87008 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(ffff800023bc92d0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800020b50000,fffffd8067088388,10,ffff800000025850,ffff800023bc9538) at alltraps_kern_meltdown+0x7b 0(b,ffff800023bc9498,83,ffff800023bc9538,0,b) at 0 rt_clone(ffff800023bc95a8,fffffd806f6c74e0,0) at rt_clone+0x78 sys/net/route.c:266 rtalloc_mpath(fffffd806f6c74e0,fffffd8069ef44f8,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] rtalloc_mpath(fffffd806f6c74e0,fffffd8069ef44f8,0) at rtalloc_mpath+0xba sys/net/route.c:359 ip_output(fffffd8069ef4400,0,fffffd806f6c74d0,20,0,fffffd806f6c7460) at ip_output+0x4f2 sys/netinet/ip_output.c:204 rip_output(fffffd8069ef4400,fffffd805c0a7c40,ffff800023bc97b8,ffff800020b50000) at rip_output+0x252 sys/netinet/raw_ip.c:289 rip_usrreq(fffffd805c0a7c40,9,fffffd8069ef4400,0,0,ffff800020abe290) at rip_usrreq+0x46a sys/netinet/raw_ip.c:538 sosend(fffffd805c0a7c40,0,ffff800023bc99d8,0,0,0) at sosend+0x645 sys/kern/uipc_socket.c:524 dofilewritev(ffff800020abe290,3,ffff800023bc99d8,0,ffff800023bc9ac0) at dofilewritev+0x1b7 sys/kern/sys_generic.c:364 sys_write(ffff800020abe290,ffff800023bc9a78,ffff800023bc9ac0) at sys_write+0x83 sys/kern/sys_generic.c:284 end trace frame: 0xffff800023bc9b30, 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{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(ffff800023bc92d0) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800020b50000,fffffd8067088388,10,ffff800000025850,ffff800023bc9538) at alltraps_kern_meltdown+0x7b 0(b,ffff800023bc9498,83,ffff800023bc9538,0,b) at 0 rt_clone(ffff800023bc95a8,fffffd806f6c74e0,0) at rt_clone+0x78 sys/net/route.c:266 rtalloc_mpath(fffffd806f6c74e0,fffffd8069ef44f8,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] rtalloc_mpath(fffffd806f6c74e0,fffffd8069ef44f8,0) at rtalloc_mpath+0xba sys/net/route.c:359 ip_output(fffffd8069ef4400,0,fffffd806f6c74d0,20,0,fffffd806f6c7460) at ip_output+0x4f2 sys/netinet/ip_output.c:204 rip_output(fffffd8069ef4400,fffffd805c0a7c40,ffff800023bc97b8,ffff800020b50000) at rip_output+0x252 sys/netinet/raw_ip.c:289 rip_usrreq(fffffd805c0a7c40,9,fffffd8069ef4400,0,0,ffff800020abe290) at rip_usrreq+0x46a sys/netinet/raw_ip.c:538 sosend(fffffd805c0a7c40,0,ffff800023bc99d8,0,0,0) at sosend+0x645 sys/kern/uipc_socket.c:524 dofilewritev(ffff800020abe290,3,ffff800023bc99d8,0,ffff800023bc9ac0) at dofilewritev+0x1b7 sys/kern/sys_generic.c:364 sys_write(ffff800020abe290,ffff800023bc9a78,ffff800023bc9ac0) at sys_write+0x83 sys/kern/sys_generic.c:284 syscall(ffff800023bc9b40) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023bc9b40) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,c,0,3,8bb6b177010) at Xsyscall+0x128 end of kernel end trace frame: 0x8bdbe605040, count: -16 ddb{0}> show registers rdi 0xffffffff81db2357 db_enter+0x17 rsi 0x2235 __ALIGN_SIZE+0x1235 rbp 0xffff800023bc9140 rbx 0xffff800023bc91f0 rdx 0x2236 __ALIGN_SIZE+0x1236 rcx 0xffff800020b50000 rax 0xffff800020b50000 r8 0xffffffff81879bcf kprintf+0x16f r9 0x1 r10 0x25 r11 0x63cc92a5b213038e r12 0x3000000008 r13 0xffff800023bc9150 r14 0x100 r15 0x1 rip 0xffffffff81db2358 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023bc9130 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.1) pid=121763 stat=onproc flags process=0 proc=4000000 pri=82, usrpri=82, nice=20 forw=0xffffffffffffffff, list=0xffff800020abf8c8,0xffff800020abe790 process=0xffff800020adc380 user=0xffff800023bc4000, vmspace=0xfffffd807f00ab80 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 36482 369255 54796 0 7 0 syz-executor.0 36482 226116 54796 0 3 0x4000080 fsleep syz-executor.0 87008 216842 34188 0 2 0 syz-executor.1 *87008 121763 34188 0 7 0x4000000 syz-executor.1 34188 427769 90139 0 3 0x82 nanosleep syz-executor.1 18287 98206 1 0 3 0x100083 ttyin getty 54796 211571 90139 0 3 0x82 nanosleep syz-executor.0 94857 360914 0 0 3 0x14200 acct acct 95106 151469 0 0 3 0x14200 bored sosplice 90139 335026 95443 0 3 0x82 thrsleep syz-fuzzer 90139 58686 95443 0 3 0x4000082 nanosleep syz-fuzzer 90139 19514 95443 0 3 0x4000082 thrsleep syz-fuzzer 90139 171691 95443 0 3 0x4000082 kqread syz-fuzzer 90139 95413 95443 0 3 0x4000082 thrsleep syz-fuzzer 90139 98201 95443 0 3 0x4000082 thrsleep syz-fuzzer 90139 303562 95443 0 3 0x4000082 thrsleep syz-fuzzer 90139 519820 95443 0 3 0x4000082 thrsleep syz-fuzzer 90139 492314 95443 0 3 0x4000082 thrsleep syz-fuzzer 90139 337037 95443 0 3 0x4000082 thrsleep syz-fuzzer 95443 429099 1750 0 3 0x10008a pause ksh 1750 245746 38664 0 3 0x92 select sshd 38664 482298 1 0 3 0x80 select sshd 19482 387746 4244 74 3 0x100092 bpf pflogd 4244 363292 1 0 3 0x80 netio pflogd 55149 377936 63127 73 3 0x100090 kqread syslogd 63127 37146 1 0 3 0x100082 netio syslogd 57563 176382 1 77 3 0x100090 poll dhclient 85994 187592 1 0 3 0x80 poll dhclient 59774 18580 0 0 2 0x14200 zerothread 72898 273454 0 0 3 0x14200 aiodoned aiodoned 20609 198807 0 0 3 0x14200 syncer update 12561 494306 0 0 3 0x14200 cleaner cleaner 231 242005 0 0 3 0x14200 reaper reaper 19599 183091 0 0 3 0x14200 pgdaemon pagedaemon 24914 509325 0 0 3 0x14200 bored crynlk 29151 88920 0 0 3 0x14200 bored crypto 52269 128660 0 0 3 0x40014200 acpi0 acpi0 35416 15994 0 0 3 0x40014200 idle1 11285 402582 0 0 3 0x14200 bored softnet 98857 265458 0 0 3 0x14200 bored systqmp 11138 94759 0 0 3 0x14200 bored systq 58609 34504 0 0 3 0x40014200 bored softclock 23506 246532 0 0 3 0x40014200 idle0 60545 490056 0 0 3 0x14200 bored smr 1 114635 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 87008 (syz-executor.1) thread 0xffff800020abe290 (121763) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82645558) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 rt_clone+0x5c sys/net/route.c:266 #2 rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] #2 rtalloc_mpath+0xba sys/net/route.c:359 #3 ip_output+0x4f2 sys/netinet/ip_output.c:204 #4 rip_output+0x252 sys/netinet/raw_ip.c:289 #5 rip_usrreq+0x46a sys/netinet/raw_ip.c:538 #6 sosend+0x645 sys/kern/uipc_socket.c:524 #7 dofilewritev+0x1b7 sys/kern/sys_generic.c:364 #8 sys_write+0x83 sys/kern/sys_generic.c:284 #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 rwlock netlock r = 0 (0xffffffff824fd158) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sosend+0x51b sys/kern/uipc_socket.c:512 #3 dofilewritev+0x1b7 sys/kern/sys_generic.c:364 #4 sys_write+0x83 sys/kern/sys_generic.c:284 #5 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #5 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #6 Xsyscall+0x128 ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9582 6452K 8262K 78643K 20250 0 0 pcb 13 10K 12K 78643K 681 0 0 rtable 136 14K 14K 78643K 1785 0 0 ifaddr 89 21K 22K 78643K 870 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1761 0 0 iov 0 0K 28K 78643K 589 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1229 77K 77K 78643K 4721 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 46 0 0 VM map 26 13K 13K 78643K 38 0 0 sem 12 0K 1K 78643K 712 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 5800 0 0 sigio 0 0K 0K 78643K 70 0 0 proc 62 63K 95K 78643K 1314 0 0 subproc 32 2K 2K 78643K 187 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 507 0 0 in_multi 32 2K 2K 78643K 388 0 0 ether_multi 1 0K 0K 78643K 29 0 0 mrt 0 0K 0K 78643K 30 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 96 424K 424K 78643K 96 0 0 exec 0 0K 1K 78643K 609 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 165 299K 300K 78643K 17066 0 0 UVM aobj 130 4K 4K 78643K 130 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 704 0 0 NDP 18 0K 0K 78643K 172 0 0 temp 178 3564K 4203K 78643K 59960 0 0 kqueue 0 0K 0K 78643K 31 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 50 0 44 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 187 0 185 1 0 1 1 0 8 0 rtentry 112 257 0 205 2 0 2 2 0 8 0 unpcb 120 2620 0 2606 3 2 1 2 0 8 0 syncache 264 33 0 33 7 7 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 78 0 78 7 7 0 1 0 8 0 tcpcb 544 2878 0 2873 14 13 1 6 0 8 0 inpcb 280 6945 0 6934 31 30 1 13 0 8 0 rttmr 72 11 0 10 4 3 1 1 0 8 0 ip6q 72 2 0 2 1 1 0 1 0 8 0 ip6af 40 4 0 4 1 1 0 1 0 8 0 nd6 48 29 0 26 1 0 1 1 0 8 0 pkpcb 40 14 0 14 4 4 0 1 0 8 0 ppxss 1128 101 0 101 12 12 0 1 0 8 0 pffrag 232 146 0 146 9 8 1 1 0 482 1 pffrnode 88 146 0 146 9 8 1 1 0 8 1 pffrent 40 4999 0 4999 9 8 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 24 288 0 263 1 0 1 1 0 8 0 pfstkey 112 288 0 263 3 0 3 3 0 8 1 pfstate 328 288 0 263 8 3 5 8 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 2 0 0 2 0 2 2 0 8 0 art_heap4 256 973 0 726 23 6 17 17 0 8 0 art_table 32 975 0 726 3 0 3 3 0 8 0 art_node 16 253 0 208 1 0 1 1 0 8 0 sysvmsgpl 40 40 0 40 1 1 0 1 0 8 0 semupl 112 18 0 18 1 1 0 1 0 8 0 semapl 112 710 0 700 1 0 1 1 0 8 0 shmpl 112 128 0 0 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 9859 0 8452 46 0 46 46 0 8 0 ffsino 272 9859 0 8452 95 0 95 95 0 8 0 nchpl 144 18210 0 17742 61 42 19 61 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 51750 0 51750 4 3 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 24 0 0 3 0 3 3 0 8 0 vmpool 552 36 0 12 3 1 2 2 0 8 0 scsiplug 64 9 0 9 2 2 0 1 0 8 0 scxspl 192 54941 0 54941 16 15 1 6 0 8 1 plimitpl 152 352 0 344 1 0 1 1 0 8 0 sigapl 432 5974 0 5958 3 1 2 3 0 8 0 futexpl 56 79844 0 79843 4 3 1 1 0 8 0 knotepl 112 687 0 668 1 0 1 1 0 8 0 kqueuepl 104 856 0 854 1 0 1 1 0 8 0 pipepl 112 1838 0 1819 6 5 1 2 0 8 0 fdescpl 488 5975 0 5958 3 0 3 3 0 8 0 filepl 152 34090 0 33986 27 22 5 14 0 8 1 lockfpl 104 1144 0 1143 1 0 1 1 0 8 0 lockfspl 48 441 0 440 1 0 1 1 0 8 0 sessionpl 112 30 0 19 1 0 1 1 0 8 0 pgrppl 48 127 0 116 1 0 1 1 0 8 0 ucredpl 96 4388 0 4379 1 0 1 1 0 8 0 zombiepl 144 5958 0 5958 4 3 1 1 0 8 1 processpl 896 5992 0 5958 4 0 4 4 0 8 0 procpl 632 15492 0 15447 9 4 5 5 0 8 0 srpgc 64 20 0 20 5 5 0 1 0 8 0 sosppl 128 108 0 108 12 11 1 1 0 8 1 sockpl 384 9807 0 9780 45 41 4 22 0 8 0 mcl64k 65536 268 0 0 33 0 33 33 0 8 0 mcl16k 16384 17 0 0 3 0 3 3 0 8 0 mcl12k 12288 22 0 0 2 0 2 2 0 8 0 mcl9k 9216 17 0 0 2 0 2 2 0 8 0 mcl8k 8192 25 0 0 4 1 3 3 0 8 0 mcl4k 4096 17 0 0 3 0 3 3 0 8 0 mcl2k2 2112 9 0 0 1 0 1 1 0 8 0 mcl2k 2048 309 0 0 19 5 14 19 0 8 0 mtagpl 80 175 0 0 4 0 4 4 0 8 1 mbufpl 256 783 0 0 41 1 40 40 0 8 0 bufpl 256 18867 0 11809 442 0 442 442 0 8 0 anonpl 16 502090 0 453149 260 51 209 214 0 124 7 amapchunkpl 152 30258 0 27832 113 18 95 101 0 158 1 amappl16 192 29626 0 28923 110 69 41 48 0 8 5 amappl15 184 17 0 16 2 1 1 1 0 8 0 amappl14 176 1104 0 1099 1 0 1 1 0 8 0 amappl13 168 26 0 25 3 2 1 1 0 8 0 amappl12 160 719 0 719 2 2 0 1 0 8 0 amappl11 152 562 0 547 1 0 1 1 0 8 0 amappl10 144 493 0 487 1 0 1 1 0 8 0 amappl9 136 2257 0 2249 1 0 1 1 0 8 0 amappl8 128 1823 0 1780 2 0 2 2 0 8 0 amappl7 120 561 0 552 1 0 1 1 0 8 0 amappl6 112 551 0 537 1 0 1 1 0 8 0 amappl5 104 949 0 935 1 0 1 1 0 8 0 amappl4 96 5606 0 5572 1 0 1 1 0 8 0 amappl3 88 959 0 950 1 0 1 1 0 8 0 amappl2 80 46565 0 46485 3 1 2 3 0 8 0 amappl1 72 124991 0 124529 25 15 10 20 0 8 0 amappl 80 15911 0 15850 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 64 129 0 0 3 0 3 3 0 8 0 uaddrrnd 24 6011 0 5958 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 6011 0 5958 1 0 1 1 0 8 0 vmmpekpl 168 37591 0 37551 2 0 2 2 0 8 0 vmmpepl 168 707061 0 705023 182 77 105 105 0 357 14 vmsppl 368 5974 0 5958 2 0 2 2 0 8 0 pdppl 4096 12029 0 11964 9 0 9 9 0 8 0 pvpl 32 1623768 0 1609818 316 171 145 169 0 265 23 pmappl 232 6010 0 5970 4 1 3 3 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 701 0 32 20 0 20 20 0 8 0