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 233656 6949 0 0 0 1 syz-executor.0 *439911 6949 0 0 0x4000000 0K 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+0x40b kerntrap(ffff800023b9b280) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800023da2000,fffffd8063683bd8,10,ffff80000005b5d0,ffff800023b9b4e8) at alltraps_kern_meltdown+0x7b 0(b,ffff800023b9b448,83,ffff800023b9b4e8,0,b) at 0 rt_clone(ffff800023b9b558,fffffd806f6d15f8,0) at rt_clone+0x78 sys/net/route.c:266 rtalloc_mpath(fffffd806f6d15f8,0,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] rtalloc_mpath(fffffd806f6d15f8,0,0) at rtalloc_mpath+0xba sys/net/route.c:359 in_pcbselsrc(ffff800023b9b630,fffffd807d419420,fffffd806f6d1578) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934 in_pcbconnect(fffffd806f6d1578,fffffd807d419400) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492 udp_usrreq(fffffd807e9e04c0,4,0,fffffd807d419400,0,ffff800020abf650) at udp_usrreq+0x560 sys_connect(ffff800020abf650,ffff800023b9b7b8,ffff800023b9b800) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388 syscall(ffff800023b9b880) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023b9b880) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,fffffffffffffed2,0,3,f60ecbb9010) at Xsyscall+0x128 end of kernel end trace frame: 0xf6316885f40, 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(ffff800023b9b280) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800023da2000,fffffd8063683bd8,10,ffff80000005b5d0,ffff800023b9b4e8) at alltraps_kern_meltdown+0x7b 0(b,ffff800023b9b448,83,ffff800023b9b4e8,0,b) at 0 rt_clone(ffff800023b9b558,fffffd806f6d15f8,0) at rt_clone+0x78 sys/net/route.c:266 rtalloc_mpath(fffffd806f6d15f8,0,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] rtalloc_mpath(fffffd806f6d15f8,0,0) at rtalloc_mpath+0xba sys/net/route.c:359 in_pcbselsrc(ffff800023b9b630,fffffd807d419420,fffffd806f6d1578) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934 in_pcbconnect(fffffd806f6d1578,fffffd807d419400) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492 udp_usrreq(fffffd807e9e04c0,4,0,fffffd807d419400,0,ffff800020abf650) at udp_usrreq+0x560 sys_connect(ffff800020abf650,ffff800023b9b7b8,ffff800023b9b800) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388 syscall(ffff800023b9b880) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800023b9b880) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,fffffffffffffed2,0,3,f60ecbb9010) at Xsyscall+0x128 end of kernel end trace frame: 0xf6316885f40, count: -14 ddb{0}> show registers rdi 0xffffffff81ceddf7 db_enter+0x17 rsi 0x2655 __ALIGN_SIZE+0x1655 rbp 0xffff800023b9b0f0 rbx 0xffff800023b9b1a0 rdx 0x2656 __ALIGN_SIZE+0x1656 rcx 0xffff800023da2000 rax 0xffff800023da2000 r8 0xffffffff81931c2f kprintf+0x16f r9 0x1 r10 0x25 r11 0xda1a468da9ad96b2 r12 0x3000000008 r13 0xffff800023b9b100 r14 0x100 r15 0x1 rip 0xffffffff81ceddf8 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800023b9b0e0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=439911 stat=onproc flags process=0 proc=4000000 pri=79, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800020abfb40,0xffff800020abf8d8 process=0xffff800020adc000 user=0xffff800023b96000, vmspace=0xfffffd807f00ba10 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 69330 377883 36632 0 2 0 syz-executor.1 6949 233656 82832 0 7 0 syz-executor.0 * 6949 439911 82832 0 7 0x4000000 syz-executor.0 6949 421616 82832 0 2 0x4000080 syz-executor.0 53926 2054 1 0 3 0x100083 ttyin getty 36632 306336 25775 0 3 0x82 nanosleep syz-executor.1 82832 493331 25775 0 2 0x482 syz-executor.0 81619 487535 0 0 3 0x14200 bored sosplice 25775 204600 8046 0 3 0x82 thrsleep syz-fuzzer 25775 28595 8046 0 3 0x4000082 nanosleep syz-fuzzer 25775 513811 8046 0 3 0x4000082 thrsleep syz-fuzzer 25775 323348 8046 0 3 0x4000082 thrsleep syz-fuzzer 25775 58815 8046 0 3 0x4000082 thrsleep syz-fuzzer 25775 40457 8046 0 3 0x4000082 kqread syz-fuzzer 25775 244477 8046 0 3 0x4000082 thrsleep syz-fuzzer 25775 72571 8046 0 3 0x4000082 thrsleep syz-fuzzer 25775 185266 8046 0 3 0x4000082 nanosleep syz-fuzzer 25775 395835 8046 0 3 0x4000082 thrsleep syz-fuzzer 8046 85227 83694 0 3 0x10008a pause ksh 83694 271718 2966 0 3 0x92 select sshd 2966 118063 1 0 3 0x80 select sshd 7583 428486 3027 74 3 0x100092 bpf pflogd 3027 512884 1 0 3 0x80 netio pflogd 58202 166299 35214 73 3 0x100090 kqread syslogd 35214 105935 1 0 3 0x100082 netio syslogd 7686 182172 1 77 3 0x100090 poll dhclient 48461 38729 1 0 3 0x80 poll dhclient 74792 88926 0 0 3 0x14200 pgzero zerothread 90262 428976 0 0 3 0x14200 aiodoned aiodoned 77416 2231 0 0 3 0x14200 syncer update 82285 114721 0 0 3 0x14200 cleaner cleaner 29795 455407 0 0 3 0x14200 reaper reaper 62206 167377 0 0 3 0x14200 pgdaemon pagedaemon 20967 135098 0 0 3 0x14200 bored crynlk 94542 234466 0 0 3 0x14200 bored crypto 90912 400938 0 0 3 0x40014200 acpi0 acpi0 60841 385385 0 0 3 0x40014200 idle1 16255 294597 0 0 3 0x14200 bored softnet 43358 292652 0 0 3 0x14200 bored systqmp 62451 397437 0 0 3 0x14200 bored systq 69439 71328 0 0 2 0x40014200 softclock 86865 45360 0 0 3 0x40014200 idle0 40843 116465 0 0 3 0x14200 bored smr 1 299437 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 6949 (syz-executor.0) thread 0xffff800020abf650 (439911) exclusive rwlock netlock r = 0 (0xffffffff824e54e8) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 solock+0x5a sys/kern/uipc_socket2.c:282 #2 sys_connect+0x6b sys/kern/uipc_syscalls.c:362 #3 syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] #3 syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 #4 Xsyscall+0x128 exclusive kernel_lock &kernel_lock r = 2 (0xffffffff8265c4c8) #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 9630 7110K 8534K 78643K 57044 0 0 pcb 13 10K 12K 78643K 1816 0 0 rtable 125 13K 14K 78643K 6539 0 0 ifaddr 105 31K 39K 78643K 2225 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1829 0 0 iov 0 0K 32K 78643K 2816 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1228 77K 78K 78643K 20029 0 0 UFS quota 1 32K 32K 78643K 1 0 0 UFS mount 5 36K 36K 78643K 5 0 0 shm 3 5K 9K 78643K 170 0 0 VM map 2 1K 1K 78643K 47 0 0 sem 12 0K 0K 78643K 1788 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 12928 0 0 sigio 0 0K 0K 78643K 98 0 0 proc 62 63K 95K 78643K 5702 0 0 subproc 32 2K 2K 78643K 869 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 654 0 0 in_multi 29 1K 2K 78643K 1023 0 0 ether_multi 1 0K 0K 78643K 41 0 0 mrt 0 0K 0K 78643K 47 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 114 503K 503K 78643K 114 0 0 exec 0 0K 1K 78643K 1877 0 0 pfkey data 0 0K 4K 78643K 5 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 139 24K 33K 78643K 42894 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 1K 78643K 1905 0 0 NDP 24 0K 1K 78643K 709 0 0 temp 258 3561K 4197K 78643K 269390 0 0 kqueue 0 0K 0K 78643K 108 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 64 168 0 161 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 689 0 687 1 0 1 1 0 8 0 rtentry 112 971 0 926 2 0 2 2 0 8 0 unpcb 120 7627 0 7608 2 1 1 2 0 8 0 syncache 264 28 0 28 15 15 0 1 0 8 0 sackhl 24 3 0 3 2 2 0 1 0 8 0 tcpqe 32 5928 0 5928 5 5 0 2 0 8 0 tcpcb 544 4324 0 4318 48 47 1 14 0 8 0 inpcb 280 10851 0 10842 64 62 2 9 0 8 1 rttmr 72 11 0 10 8 7 1 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 nd6 48 146 0 144 4 3 1 1 0 8 0 pkpcb 40 57 0 57 20 20 0 1 0 8 0 swfcl 56 1 0 0 1 0 1 1 0 8 0 ppxss 1128 388 0 388 32 31 1 1 0 8 1 pffrag 232 58 0 58 24 24 0 1 0 482 0 pffrnode 88 58 0 58 24 24 0 1 0 8 0 pffrent 40 136 0 136 26 26 0 1 0 8 0 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 24 706 0 650 1 0 1 1 0 8 0 pfstkey 112 707 0 651 3 0 3 3 0 8 0 pfstate 328 707 0 651 14 8 6 8 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 18 0 16 9 7 2 4 0 8 0 art_heap4 256 4286 0 4008 43 22 21 21 0 8 0 art_table 32 4304 0 4024 3 0 3 3 0 8 0 art_node 16 969 0 927 1 0 1 1 0 8 0 sysvmsgpl 40 84 0 58 1 0 1 1 0 8 0 semapl 112 1786 0 1776 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 21282 0 19838 47 0 47 47 0 8 0 ffsino 272 21282 0 19838 98 1 97 97 0 8 0 nchpl 144 43115 0 42608 61 40 21 61 0 8 0 uvmvnodes 72 7712 0 0 141 0 141 141 0 8 0 vnodes 208 7712 0 0 406 0 406 406 0 8 0 namei 1024 144229 0 144229 4 3 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 45 0 45 19 19 0 1 0 8 0 scsiplug 64 21 0 21 14 13 1 1 0 8 1 scxspl 192 130551 0 130551 75 72 3 7 0 8 3 plimitpl 152 936 0 928 1 0 1 1 0 8 0 sigapl 432 12984 0 12968 5 3 2 3 0 8 0 futexpl 56 241793 0 241793 2 1 1 1 0 8 1 knotepl 112 3150 0 3129 9 8 1 3 0 8 0 kqueuepl 104 10509 0 10503 15 14 1 4 0 8 0 pipepl 112 8866 0 8847 20 19 1 2 0 8 0 fdescpl 488 12985 0 12968 3 0 3 3 0 8 0 filepl 152 107998 0 107889 76 70 6 13 0 8 1 lockfpl 104 4980 0 4979 1 0 1 1 0 8 0 lockfspl 48 1924 0 1923 1 0 1 1 0 8 0 sessionpl 112 70 0 59 1 0 1 1 0 8 0 pgrppl 48 150 0 139 1 0 1 1 0 8 0 ucredpl 96 11329 0 11319 1 0 1 1 0 8 0 zombiepl 144 12980 0 12980 6 5 1 1 0 8 1 processpl 896 13013 0 12980 6 2 4 5 0 8 0 procpl 632 39471 0 39427 15 10 5 5 0 8 1 srpgc 64 59 0 59 25 25 0 1 0 8 0 sosppl 128 152 0 152 33 32 1 1 0 8 1 sockpl 384 19307 0 19277 70 65 5 15 0 8 1 mcl64k 65536 572 0 0 64 32 32 34 0 8 1 mcl16k 16384 41 0 0 6 3 3 3 0 8 0 mcl12k 12288 57 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 4 1 3 3 0 8 0 mcl4k 4096 32 0 0 3 0 3 3 0 8 0 mcl2k2 2112 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 253 0 0 23 12 11 23 0 8 0 mtagpl 80 172 0 0 1 0 1 1 0 8 0 mbufpl 256 1165 0 0 33 1 32 32 0 8 0 bufpl 256 46751 0 39038 483 0 483 483 0 8 0 anonpl 16 1332679 0 1317154 331 256 75 84 0 124 6 amapchunkpl 152 85174 0 85065 173 167 6 18 0 158 0 amappl16 192 66625 0 65705 330 279 51 59 0 8 3 amappl15 184 2047 0 2045 1 0 1 1 0 8 0 amappl14 176 3159 0 3155 2 1 1 1 0 8 0 amappl13 168 1900 0 1899 7 6 1 1 0 8 0 amappl12 160 1214 0 1211 2 1 1 1 0 8 0 amappl11 152 2141 0 2126 1 0 1 1 0 8 0 amappl10 144 1203 0 1197 1 0 1 1 0 8 0 amappl9 136 2666 0 2658 1 0 1 1 0 8 0 amappl8 128 2228 0 2167 4 1 3 3 0 8 0 amappl7 120 1431 0 1420 1 0 1 1 0 8 0 amappl6 112 2093 0 2073 1 0 1 1 0 8 0 amappl5 104 2474 0 2461 1 0 1 1 0 8 0 amappl4 96 13175 0 13136 6 5 1 2 0 8 0 amappl3 88 3895 0 3890 1 0 1 1 0 8 0 amappl2 80 101847 0 101770 4 2 2 3 0 8 0 amappl1 72 285498 0 285048 26 16 10 20 0 8 0 amappl 80 40621 0 40582 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 13030 0 12968 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 13030 0 12968 1 0 1 1 0 8 0 vmmpekpl 168 101135 0 101103 3 0 3 3 0 8 0 vmmpepl 168 1596277 0 1594081 573 443 130 134 0 357 28 vmsppl 368 12984 0 12968 2 0 2 2 0 8 0 pdppl 4096 26067 0 26026 7 1 6 6 0 8 0 pvpl 32 3882445 0 3863679 581 397 184 198 0 265 21 pmappl 232 13029 0 13013 15 14 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 834 0 133 21 0 21 21 0 8 0