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 *136821 10713 0 0 0x4000000 0 syz-executor.0 518502 15734 0 0x2 0 1 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(ffff800022b8e950) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800022f88000,fffffd8063e1e778,10,ffff80000005b4b0,ffff800022b8ebb8) at alltraps_kern_meltdown+0x7b 0(b,ffff800022b8eb18,83,ffff800022b8ebb8,0,b) at 0 rt_clone(ffff800022b8ec28,fffffd806f6cba58,0) at rt_clone+0x78 sys/net/route.c:266 rtalloc_mpath(fffffd806f6cba58,0,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] rtalloc_mpath(fffffd806f6cba58,0,0) at rtalloc_mpath+0xba sys/net/route.c:359 in_pcbselsrc(ffff800022b8ed00,fffffd806f21a720,fffffd806f6cb9d8) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934 in_pcbconnect(fffffd806f6cb9d8,fffffd806f21a700) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492 tcp_usrreq(fffffd8065e7b330,4,0,fffffd806f21a700,0,ffff800020aceef0) at tcp_usrreq+0xacb sys/netinet/tcp_usrreq.c:228 sys_connect(ffff800020aceef0,ffff800022b8eea8,ffff800022b8eef0) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388 syscall(ffff800022b8ef70) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022b8ef70) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,fffffffffffffed2,0,3,7fce3ebf010) at Xsyscall+0x128 end of kernel end trace frame: 0x7ff38845140, 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(ffff800022b8e950) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800022f88000,fffffd8063e1e778,10,ffff80000005b4b0,ffff800022b8ebb8) at alltraps_kern_meltdown+0x7b 0(b,ffff800022b8eb18,83,ffff800022b8ebb8,0,b) at 0 rt_clone(ffff800022b8ec28,fffffd806f6cba58,0) at rt_clone+0x78 sys/net/route.c:266 rtalloc_mpath(fffffd806f6cba58,0,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] rtalloc_mpath(fffffd806f6cba58,0,0) at rtalloc_mpath+0xba sys/net/route.c:359 in_pcbselsrc(ffff800022b8ed00,fffffd806f21a720,fffffd806f6cb9d8) at in_pcbselsrc+0x219 sys/netinet/in_pcb.c:934 in_pcbconnect(fffffd806f6cb9d8,fffffd806f21a700) at in_pcbconnect+0x107 sys/netinet/in_pcb.c:492 tcp_usrreq(fffffd8065e7b330,4,0,fffffd806f21a700,0,ffff800020aceef0) at tcp_usrreq+0xacb sys/netinet/tcp_usrreq.c:228 sys_connect(ffff800020aceef0,ffff800022b8eea8,ffff800022b8eef0) at sys_connect+0x3df sys/kern/uipc_syscalls.c:388 syscall(ffff800022b8ef70) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff800022b8ef70) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,fffffffffffffed2,0,3,7fce3ebf010) at Xsyscall+0x128 end of kernel end trace frame: 0x7ff38845140, count: -14 ddb{0}> show registers rdi 0xffffffff8120a007 db_enter+0x17 rsi 0x257a __ALIGN_SIZE+0x157a rbp 0xffff800022b8e7c0 rbx 0xffff800022b8e870 rdx 0x257b __ALIGN_SIZE+0x157b rcx 0xffff800022f88000 rax 0xffff800022f88000 r8 0xffffffff8133d93f kprintf+0x16f r9 0x1 r10 0x25 r11 0x357818db5b4a3ca4 r12 0x3000000008 r13 0xffff800022b8e7d0 r14 0x100 r15 0x1 rip 0xffffffff8120a008 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff800022b8e7b0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor.0) pid=136821 stat=onproc flags process=0 proc=4000000 pri=79, usrpri=79, nice=20 forw=0xffffffffffffffff, list=0xffff800020acf168,0xffffffff82644f88 process=0xffff800020a8aa90 user=0xffff800022b8a000, vmspace=0xfffffd807f00aa10 estcpu=36, cpticks=1, pctcpu=0.0 user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 10713 182728 8080 0 2 0 syz-executor.0 *10713 136821 8080 0 7 0x4000000 syz-executor.0 65817 161802 15734 0 2 0 syz-executor.1 65817 275369 15734 0 3 0x4000080 ttyin syz-executor.1 15734 518502 19305 0 7 0x2 syz-executor.1 8080 253464 19305 0 3 0x82 nanosleep syz-executor.0 30575 311320 1 0 3 0x100083 ttyin getty 94073 21693 0 0 3 0x14200 acct acct 48199 390846 0 0 3 0x14200 bored sosplice 19305 58285 33525 0 3 0x82 thrsleep syz-fuzzer 19305 100780 33525 0 3 0x4000082 thrsleep syz-fuzzer 19305 149300 33525 0 3 0x4000082 thrsleep syz-fuzzer 19305 501593 33525 0 3 0x4000082 thrsleep syz-fuzzer 19305 150790 33525 0 3 0x4000082 thrsleep syz-fuzzer 19305 421664 33525 0 3 0x4000082 thrsleep syz-fuzzer 19305 418289 33525 0 3 0x4000082 thrsleep syz-fuzzer 19305 326651 33525 0 3 0x4000082 thrsleep syz-fuzzer 19305 239816 33525 0 3 0x4000082 kqread syz-fuzzer 19305 226301 33525 0 3 0x4000082 thrsleep syz-fuzzer 33525 250602 70965 0 3 0x10008a pause ksh 70965 343584 93946 0 3 0x92 select sshd 93946 179135 1 0 3 0x80 select sshd 35406 296678 32779 74 3 0x100092 bpf pflogd 32779 92010 1 0 3 0x80 netio pflogd 84605 78157 42140 73 3 0x100090 kqread syslogd 42140 219933 1 0 3 0x100082 netio syslogd 46185 173442 1 77 3 0x100090 poll dhclient 87920 124438 1 0 3 0x80 poll dhclient 47740 517314 0 0 2 0x14200 zerothread 22743 498029 0 0 3 0x14200 aiodoned aiodoned 34412 521126 0 0 3 0x14200 syncer update 79137 179758 0 0 3 0x14200 cleaner cleaner 59848 101669 0 0 3 0x14200 reaper reaper 67819 510935 0 0 3 0x14200 pgdaemon pagedaemon 51403 90036 0 0 3 0x14200 bored crynlk 7120 255467 0 0 3 0x14200 bored crypto 14599 39109 0 0 3 0x40014200 acpi0 acpi0 57137 177453 0 0 3 0x40014200 idle1 36797 78878 0 0 3 0x14200 bored softnet 70825 75489 0 0 3 0x14200 bored systqmp 72509 124368 0 0 3 0x14200 bored systq 48186 100719 0 0 3 0x40014200 bored softclock 33284 16796 0 0 3 0x40014200 idle0 81764 468991 0 0 3 0x14200 bored smr 1 243451 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 10713 (syz-executor.0) thread 0xffff800020aceef0 (136821) exclusive rwlock netlock r = 0 (0xffffffff824c7128) #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 (0xffffffff8266e8b8) #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 9614 6596K 7870K 78643K 22096 0 0 pcb 13 8K 8K 78643K 903 0 0 rtable 99 12K 14K 78643K 2757 0 0 ifaddr 98 22K 24K 78643K 952 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1640 0 0 iov 0 0K 32K 78643K 9041 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1214 76K 77K 78643K 5661 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 49 0 0 VM map 2 1K 1K 78643K 20 0 0 sem 12 1K 1K 78643K 14 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1808 196K 290K 78643K 12765 0 0 file desc 6 17K 25K 78643K 5115 0 0 sigio 0 0K 0K 78643K 37 0 0 proc 62 63K 95K 78643K 2408 0 0 subproc 32 2K 2K 78643K 579 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 247 0 0 in_multi 15 0K 2K 78643K 489 0 0 ether_multi 1 0K 0K 78643K 20 0 0 mrt 0 0K 0K 78643K 29 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 90 397K 397K 78643K 90 0 0 exec 0 0K 1K 78643K 1141 0 0 pfkey data 0 0K 4K 78643K 1 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 125 23K 33K 78643K 18496 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 976 0 0 NDP 22 0K 1K 78643K 299 0 0 temp 243 3557K 4197K 78643K 107802 0 0 kqueue 0 0K 0K 78643K 26 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 71 0 65 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 304 0 302 1 0 1 1 0 8 0 rtentry 112 428 0 395 2 0 2 2 0 8 0 unpcb 120 2552 0 2538 1 0 1 1 0 8 0 syncache 264 23 0 23 12 11 1 1 0 8 1 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 5637 0 5637 3 3 0 2 0 8 0 tcpcb 544 1410 0 1405 2 1 1 2 0 8 0 inpcb 280 4790 0 4782 15 14 1 3 0 8 0 rttmr 72 10 0 9 5 4 1 1 0 8 0 ip6q 72 1 0 1 1 1 0 1 0 8 0 nd6 48 68 0 68 3 3 0 1 0 8 0 pkpcb 40 20 0 20 8 7 1 1 0 8 1 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 131 0 131 15 14 1 1 0 8 1 pffrag 232 53 0 53 16 15 1 1 0 482 1 pffrnode 88 53 0 53 16 15 1 1 0 8 1 pffrent 40 130 0 130 18 17 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 24 348 0 284 1 0 1 1 0 8 0 pfstkey 112 348 0 284 3 0 3 3 0 8 0 pfstate 328 348 0 284 7 1 6 6 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 19 0 17 11 9 2 3 0 8 0 art_heap4 256 1971 0 1795 31 17 14 17 0 8 0 art_table 32 1990 0 1812 5 2 3 3 0 8 0 art_node 16 427 0 396 1 0 1 1 0 8 0 sysvmsgpl 40 36 0 22 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 12 0 2 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 9162 0 7734 47 0 47 47 0 8 0 ffsino 272 9162 0 7734 96 0 96 96 0 8 0 nchpl 144 19315 0 18845 61 40 21 61 0 8 0 uvmvnodes 72 6760 0 0 123 0 123 123 0 8 0 vnodes 208 6760 0 0 356 0 356 356 0 8 0 namei 1024 62939 0 62939 4 3 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vmpool 552 18 0 18 10 10 0 1 0 8 0 scsiplug 64 7 0 7 4 4 0 1 0 8 0 scxspl 192 54363 0 54363 43 42 1 7 0 8 1 plimitpl 152 419 0 411 1 0 1 1 0 8 0 sigapl 432 5228 0 5212 4 2 2 3 0 8 0 futexpl 56 106706 0 106706 1 0 1 1 0 8 1 knotepl 112 1250 0 1231 4 3 1 2 0 8 0 kqueuepl 104 1077 0 1075 1 0 1 1 0 8 0 pipepl 112 2982 0 2963 12 11 1 2 0 8 0 fdescpl 488 5229 0 5212 3 0 3 3 0 8 0 filepl 152 42163 0 42058 20 14 6 7 0 8 1 lockfpl 104 1988 0 1987 1 0 1 1 0 8 0 lockfspl 48 625 0 624 1 0 1 1 0 8 0 sessionpl 112 59 0 48 1 0 1 1 0 8 0 pgrppl 48 103 0 92 1 0 1 1 0 8 0 ucredpl 96 5141 0 5131 1 0 1 1 0 8 0 zombiepl 144 5214 0 5214 4 3 1 1 0 8 1 processpl 896 5248 0 5214 5 1 4 5 0 8 0 procpl 632 16067 0 16022 5 0 5 5 0 8 0 srpgc 64 60 0 60 15 15 0 1 0 8 0 sosppl 128 78 0 78 16 15 1 1 0 8 1 sockpl 384 7697 0 7673 11 7 4 5 0 8 0 mcl64k 65536 266 0 0 34 16 18 34 0 8 0 mcl16k 16384 33 0 0 4 1 3 3 0 8 0 mcl12k 12288 33 0 0 2 0 2 2 0 8 0 mcl9k 9216 33 0 0 2 0 2 2 0 8 0 mcl8k 8192 33 0 0 4 1 3 3 0 8 0 mcl4k 4096 33 0 0 4 1 3 3 0 8 0 mcl2k2 2112 8 0 0 1 0 1 1 0 8 0 mcl2k 2048 225 0 0 24 4 20 24 0 8 0 mtagpl 80 87 0 0 1 0 1 1 0 8 0 mbufpl 256 537 0 0 23 0 23 23 0 8 0 bufpl 256 23116 0 16068 441 0 441 441 0 8 0 anonpl 16 586248 0 570235 174 94 80 81 0 124 9 amapchunkpl 152 35982 0 35851 73 64 9 13 0 158 3 amappl16 192 26502 0 25600 181 127 54 58 0 8 6 amappl15 184 553 0 552 4 3 1 1 0 8 0 amappl14 176 1385 0 1379 2 1 1 1 0 8 0 amappl13 168 789 0 789 6 6 0 1 0 8 0 amappl12 160 288 0 283 1 0 1 1 0 8 0 amappl11 152 324 0 309 1 0 1 1 0 8 0 amappl10 144 285 0 277 1 0 1 1 0 8 0 amappl9 136 2578 0 2571 1 0 1 1 0 8 0 amappl8 128 2075 0 2037 2 0 2 2 0 8 0 amappl7 120 453 0 442 1 0 1 1 0 8 0 amappl6 112 268 0 257 1 0 1 1 0 8 0 amappl5 104 801 0 786 1 0 1 1 0 8 0 amappl4 96 5969 0 5935 1 0 1 1 0 8 0 amappl3 88 1098 0 1092 1 0 1 1 0 8 0 amappl2 80 40077 0 39996 4 2 2 3 0 8 0 amappl1 72 127523 0 127066 26 16 10 20 0 8 0 amappl 80 16898 0 16854 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 5247 0 5212 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 5247 0 5212 1 0 1 1 0 8 0 vmmpekpl 168 44963 0 44927 2 0 2 2 0 8 0 vmmpepl 168 666514 0 664350 300 183 117 130 0 357 18 vmsppl 368 5228 0 5212 2 0 2 2 0 8 0 pdppl 4096 10501 0 10460 7 1 6 6 0 8 0 pvpl 32 1588926 0 1569574 383 191 192 193 0 265 27 pmappl 232 5246 0 5230 10 9 1 2 0 8 0 extentpl 40 41 0 26 1 0 1 1 0 8 0 phpool 112 694 0 57 19 0 19 19 0 8 0