oLpanic: attempt to execute user address 0x0 in supervisor mode Stopped at db_enter+0x18: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *179194 78796 0 0 0x4000000 1K syz-executor.1 37083 66797 0 0x14000 0x200 0 reaper 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(ffff8000249ecf90) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800020b6c000,fffffd8064002858,10,ffff80000005bc80,ffff8000249ed1f8) at alltraps_kern_meltdown+0x7b 0(b,ffff8000249ed158,83,ffff8000249ed1f8,0,b) at 0 rt_clone(ffff8000249ed268,fffffd806f6d0080,0) at rt_clone+0x78 sys/net/route.c:266 rtalloc_mpath(fffffd806f6d0080,fffffd8007de2874,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] rtalloc_mpath(fffffd806f6d0080,fffffd8007de2874,0) at rtalloc_mpath+0xba sys/net/route.c:359 ip_output(fffffd807f027700,0,fffffd806f6d0070,20,0,fffffd806f6d0000) at ip_output+0x4f2 sys/netinet/ip_output.c:204 rip_output(fffffd807f027700,fffffd8061ee0210,ffff8000249ed478,ffff800020b6c000) at rip_output+0x252 sys/netinet/raw_ip.c:289 rip_usrreq(fffffd8061ee0210,9,fffffd807f027700,0,0,ffff800020ace788) at rip_usrreq+0x46a sys/netinet/raw_ip.c:538 sosend(fffffd8061ee0210,0,ffff8000249ed698,0,0,80) at sosend+0x645 sys/kern/uipc_socket.c:524 dofilewritev(ffff800020ace788,4,ffff8000249ed698,0,ffff8000249ed780) at dofilewritev+0x1b7 sys/kern/sys_generic.c:364 sys_write(ffff800020ace788,ffff8000249ed738,ffff8000249ed780) at sys_write+0x83 sys/kern/sys_generic.c:284 end trace frame: 0xffff8000249ed7f0, 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{1}> ddb{1}> set $lines = 0 ddb{1}> set $maxwidth = 0 ddb{1}> show panic attempt to execute user address 0x0 in supervisor mode ddb{1}> 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(ffff8000249ecf90) at kerntrap+0xec sys/arch/amd64/amd64/trap.c:287 alltraps_kern_meltdown(6,ffff800020b6c000,fffffd8064002858,10,ffff80000005bc80,ffff8000249ed1f8) at alltraps_kern_meltdown+0x7b 0(b,ffff8000249ed158,83,ffff8000249ed1f8,0,b) at 0 rt_clone(ffff8000249ed268,fffffd806f6d0080,0) at rt_clone+0x78 sys/net/route.c:266 rtalloc_mpath(fffffd806f6d0080,fffffd8007de2874,0) at rtalloc_mpath+0xba rt_match sys/net/route.c:244 [inline] rtalloc_mpath(fffffd806f6d0080,fffffd8007de2874,0) at rtalloc_mpath+0xba sys/net/route.c:359 ip_output(fffffd807f027700,0,fffffd806f6d0070,20,0,fffffd806f6d0000) at ip_output+0x4f2 sys/netinet/ip_output.c:204 rip_output(fffffd807f027700,fffffd8061ee0210,ffff8000249ed478,ffff800020b6c000) at rip_output+0x252 sys/netinet/raw_ip.c:289 rip_usrreq(fffffd8061ee0210,9,fffffd807f027700,0,0,ffff800020ace788) at rip_usrreq+0x46a sys/netinet/raw_ip.c:538 sosend(fffffd8061ee0210,0,ffff8000249ed698,0,0,80) at sosend+0x645 sys/kern/uipc_socket.c:524 dofilewritev(ffff800020ace788,4,ffff8000249ed698,0,ffff8000249ed780) at dofilewritev+0x1b7 sys/kern/sys_generic.c:364 sys_write(ffff800020ace788,ffff8000249ed738,ffff8000249ed780) at sys_write+0x83 sys/kern/sys_generic.c:284 syscall(ffff8000249ed800) at syscall+0x4a4 mi_syscall sys/sys/syscall_mi.h:92 [inline] syscall(ffff8000249ed800) at syscall+0x4a4 sys/arch/amd64/amd64/trap.c:555 Xsyscall(6,0,c,0,3,2c3a3fa7010) at Xsyscall+0x128 end of kernel end trace frame: 0x2c5b4157ec0, count: -16 ddb{1}> show registers rdi 0xffffffff81d97467 db_enter+0x17 rsi 0x255b __ALIGN_SIZE+0x155b rbp 0xffff8000249ece00 rbx 0xffff8000249eceb0 rdx 0x255c __ALIGN_SIZE+0x155c rcx 0xffff800020b6c000 rax 0xffff800020b6c000 r8 0xffffffff815fe7df kprintf+0x16f r9 0x1 r10 0x25 r11 0x86d51cf67aa362e1 r12 0x3000000008 r13 0xffff8000249ece10 r14 0x100 r15 0x1 rip 0xffffffff81d97468 db_enter+0x18 cs 0x8 rflags 0x246 rsp 0xffff8000249ecdf0 ss 0x10 db_enter+0x18: addq $0x8,%rsp ddb{1}> show proc PROC (syz-executor.1) pid=179194 stat=onproc flags process=0 proc=4000000 pri=86, usrpri=86, nice=20 forw=0xffffffffffffffff, list=0xffff800020aceef0,0xffff800020ace2a8 process=0xffff800020adc700 user=0xffff8000249e8000, vmspace=0xfffffd807f0078a0 estcpu=36, cpticks=0, pctcpu=0.0 user=0, sys=0, intr=0 ddb{1}> ps PID TID PPID UID S FLAGS WAIT COMMAND 78796 232849 51550 0 2 0 syz-executor.1 *78796 179194 51550 0 7 0x4000000 syz-executor.1 78796 125279 51550 0 3 0x4000080 fsleep syz-executor.1 51550 262081 71778 0 3 0x82 nanosleep syz-executor.1 84006 165333 71778 0 3 0x82 nanosleep syz-executor.0 94981 344113 1 0 3 0x100083 ttyin getty 60095 162676 0 0 3 0x14200 acct acct 11803 28783 0 0 3 0x14200 bored sosplice 71778 190133 32011 0 3 0x82 thrsleep syz-fuzzer 71778 33675 32011 0 3 0x4000082 thrsleep syz-fuzzer 71778 22052 32011 0 3 0x4000082 thrsleep syz-fuzzer 71778 278231 32011 0 3 0x4000082 thrsleep syz-fuzzer 71778 454026 32011 0 3 0x4000082 thrsleep syz-fuzzer 71778 395663 32011 0 3 0x4000082 kqread syz-fuzzer 71778 352445 32011 0 3 0x4000082 thrsleep syz-fuzzer 71778 236695 32011 0 3 0x4000082 thrsleep syz-fuzzer 71778 125252 32011 0 3 0x4000082 thrsleep syz-fuzzer 71778 297192 32011 0 3 0x4000082 thrsleep syz-fuzzer 71778 120986 32011 0 3 0x4000082 thrsleep syz-fuzzer 32011 415077 94003 0 3 0x10008a pause ksh 94003 334612 67192 0 3 0x92 select sshd 67192 487502 1 0 3 0x80 select sshd 39265 38702 80763 74 3 0x100092 bpf pflogd 80763 269550 1 0 3 0x80 netio pflogd 13785 335071 33208 73 3 0x100090 kqread syslogd 33208 434597 1 0 3 0x100082 netio syslogd 15039 456882 1 77 3 0x100090 poll dhclient 26006 322752 1 0 3 0x80 poll dhclient 59496 229192 0 0 2 0x14200 zerothread 59335 400589 0 0 3 0x14200 aiodoned aiodoned 24888 173435 0 0 3 0x14200 syncer update 64462 346359 0 0 3 0x14200 cleaner cleaner 66797 37083 0 0 7 0x14200 reaper 30074 75706 0 0 3 0x14200 pgdaemon pagedaemon 21300 279619 0 0 3 0x14200 bored crynlk 94168 63088 0 0 3 0x14200 bored crypto 26181 326702 0 0 3 0x40014200 acpi0 acpi0 36920 311496 0 0 3 0x40014200 idle1 15400 196127 0 0 3 0x14200 bored softnet 71584 291162 0 0 3 0x14200 bored systqmp 26176 5201 0 0 3 0x14200 bored systq 98012 305991 0 0 3 0x40014200 bored softclock 21646 488684 0 0 3 0x40014200 idle0 78724 101345 0 0 3 0x14200 bored smr 1 78708 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{1}> show all locks CPU 0: exclusive mutex &pmap->pm_mtx r = 0 (0xfffffd8062279760) #0 witness_lock+0x52e sys/kern/subr_witness.c:1163 #1 mtx_enter_try+0x102 #2 mtx_enter+0x4b sys/kern/kern_lock.c:266 #3 pmap_do_remove+0x88 rcr3 machine/cpufunc.h:141 [inline] #3 pmap_do_remove+0x88 pmap_map_ptes sys/arch/amd64/amd64/pmap.c:418 [inline] #3 pmap_do_remove+0x88 sys/arch/amd64/amd64/pmap.c:1688 #4 uvm_map_teardown+0x195 uvm_map_addr_RBT_LEFT sys/uvm/uvm_map.h:206 [inline] #4 uvm_map_teardown+0x195 sys/uvm/uvm_map.c:2715 #5 uvmspace_free+0x86 sys/uvm/uvm_map.c:3588 #6 uvm_exit+0x29 sys/uvm/uvm_glue.c:297 #7 reaper+0x189 sys/kern/kern_exit.c:442 #8 proc_trampoline+0x1c Process 78796 (syz-executor.1) thread 0xffff800020ace788 (179194) exclusive kernel_lock &kernel_lock r = 1 (0xffffffff82670948) #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 (0xffffffff824ef928) #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{1}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim Kern Lim devbuf 9612 6586K 9091K 78643K 22847 0 0 pcb 13 10K 12K 78643K 489 0 0 rtable 120 13K 13K 78643K 1349 0 0 ifaddr 93 19K 20K 78643K 449 0 0 counters 39 33K 33K 78643K 39 0 0 ioctlops 0 0K 4K 78643K 1584 0 0 iov 0 0K 28K 78643K 453 0 0 mount 1 1K 1K 78643K 1 0 0 vnodes 1231 77K 78K 78643K 4763 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 26 0 0 VM map 19 9K 9K 78643K 29 0 0 sem 12 0K 0K 78643K 813 0 0 dirhash 12 2K 2K 78643K 12 0 0 ACPI 1809 196K 290K 78643K 12766 0 0 file desc 5 13K 25K 78643K 2139 0 0 sigio 0 0K 0K 78643K 25 0 0 proc 60 63K 95K 78643K 1174 0 0 subproc 32 2K 2K 78643K 255 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 263 0 0 in_multi 31 2K 2K 78643K 293 0 0 ether_multi 1 0K 0K 78643K 29 0 0 mrt 0 0K 0K 78643K 17 0 0 ISOFS mount 1 32K 32K 78643K 1 0 0 MSDOSFS mount 1 16K 16K 78643K 1 0 0 ttys 84 371K 371K 78643K 84 0 0 exec 0 0K 1K 78643K 602 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 154 138K 147K 78643K 8443 0 0 UVM aobj 130 9K 9K 78643K 136 0 0 memdesc 1 4K 4K 78643K 1 0 0 crypto data 1 1K 1K 78643K 1 0 0 ip6_options 0 0K 2K 78643K 488 0 0 NDP 20 0K 0K 78643K 135 0 0 temp 227 3561K 3636K 78643K 85032 0 0 kqueue 0 0K 0K 78643K 19 0 0 SYN cache 2 16K 16K 78643K 2 0 0 ddb{1}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle arp 64 30 0 24 1 0 1 1 0 8 0 plcache 128 20 0 0 1 0 1 1 0 8 0 rtpcb 80 211 0 209 1 0 1 1 0 8 0 rtentry 112 234 0 187 2 0 2 2 0 8 0 unpcb 120 1308 0 1297 1 0 1 1 0 8 0 syncache 264 20 0 20 6 6 0 1 0 8 0 sackhl 24 1 0 1 1 1 0 1 0 8 0 tcpqe 32 14 0 14 4 4 0 1 0 8 0 tcpcb 544 1111 0 1103 14 13 1 11 0 8 0 ipq 40 2 0 2 1 1 0 1 0 8 0 ipqe 40 4 0 4 1 1 0 1 0 8 0 inpcb 280 4121 0 4112 14 12 2 9 0 8 1 rttmr 72 8 0 7 2 1 1 1 0 8 0 nd6 48 34 0 32 2 1 1 1 0 8 0 pkpcb 40 10 0 10 3 3 0 1 0 8 0 swfcl 56 2 0 0 1 0 1 1 0 8 0 ppxss 1128 41 0 41 10 9 1 1 0 8 1 pffrag 232 54 0 54 5 4 1 1 0 482 1 pffrnode 88 54 0 54 5 4 1 1 0 8 1 pffrent 40 2100 0 2100 5 4 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 24 182 0 120 1 0 1 1 0 8 0 pfstkey 112 183 0 121 2 0 2 2 0 8 0 pfstate 328 183 0 121 7 1 6 6 0 8 0 pfrule 1360 21 0 16 2 1 1 2 0 8 0 art_heap8 4096 4 0 2 3 0 3 3 0 8 1 art_heap4 256 999 0 773 27 12 15 18 0 8 0 art_table 32 1003 0 775 3 0 3 3 0 8 0 art_node 16 230 0 188 1 0 1 1 0 8 0 sysvmsgpl 40 35 0 18 1 0 1 1 0 8 0 semupl 112 2 0 2 1 1 0 1 0 8 0 semapl 112 811 0 801 1 0 1 1 0 8 0 shmpl 112 134 0 6 4 0 4 4 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino1pl 128 4541 0 3131 46 0 46 46 0 8 0 ffsino 272 4541 0 3131 95 0 95 95 0 8 0 nchpl 144 7957 0 7496 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 28935 0 28935 2 1 1 1 0 8 1 percpumem 16 30 0 0 1 0 1 1 0 8 0 vcpupl 1984 17 0 0 3 0 3 3 0 8 0 vmpool 552 27 0 10 2 0 2 2 0 8 0 scxspl 192 26511 0 26511 22 21 1 7 0 8 1 plimitpl 152 187 0 179 1 0 1 1 0 8 0 sigapl 432 2299 0 2284 3 1 2 3 0 8 0 futexpl 56 50439 0 50438 1 0 1 1 0 8 0 knotepl 112 996 0 977 2 0 2 2 0 8 1 kqueuepl 104 1057 0 1055 4 3 1 4 0 8 0 pipepl 112 1426 0 1407 2 1 1 2 0 8 0 fdescpl 488 2300 0 2284 3 0 3 3 0 8 0 filepl 152 21573 0 21471 22 16 6 13 0 8 1 lockfpl 104 641 0 640 1 0 1 1 0 8 0 lockfspl 48 224 0 223 1 0 1 1 0 8 0 sessionpl 112 32 0 21 1 0 1 1 0 8 0 pgrppl 48 42 0 31 1 0 1 1 0 8 0 ucredpl 96 2879 0 2870 1 0 1 1 0 8 0 zombiepl 144 2284 0 2283 2 1 1 1 0 8 0 processpl 896 2317 0 2283 4 0 4 4 0 8 0 procpl 632 6983 0 6936 5 0 5 5 0 8 0 srpgc 64 24 0 24 7 7 0 1 0 8 0 sosppl 128 31 0 31 8 8 0 1 0 8 0 sockpl 384 5689 0 5667 27 22 5 14 0 8 2 mcl64k 65536 264 0 0 33 3 30 33 0 8 1 mcl16k 16384 7 0 0 1 0 1 1 0 8 0 mcl12k 12288 25 0 0 2 0 2 2 0 8 0 mcl9k 9216 10 0 0 1 0 1 1 0 8 0 mcl8k 8192 9 0 0 2 0 2 2 0 8 0 mcl4k 4096 13 0 0 2 0 2 2 0 8 0 mcl2k2 2112 4 0 0 1 0 1 1 0 8 0 mcl2k 2048 165 0 0 20 0 20 20 0 8 0 mtagpl 80 60 0 0 1 0 1 1 0 8 0 mbufpl 256 728 0 0 43 0 43 43 0 8 0 bufpl 256 12701 0 5643 442 0 442 442 0 8 0 anonpl 16 307565 0 289794 143 58 85 98 0 124 0 amapchunkpl 152 17044 0 16878 43 35 8 20 0 158 1 amappl16 192 12935 0 11792 129 70 59 68 0 8 1 amappl15 184 865 0 861 4 3 1 1 0 8 0 amappl14 176 273 0 268 1 0 1 1 0 8 0 amappl13 168 591 0 589 1 0 1 1 0 8 0 amappl12 160 258 0 258 2 2 0 1 0 8 0 amappl11 152 242 0 227 1 0 1 1 0 8 0 amappl10 144 284 0 278 1 0 1 1 0 8 0 amappl9 136 910 0 905 1 0 1 1 0 8 0 amappl8 128 468 0 422 2 0 2 2 0 8 0 amappl7 120 369 0 361 1 0 1 1 0 8 0 amappl6 112 204 0 193 1 0 1 1 0 8 0 amappl5 104 513 0 500 1 0 1 1 0 8 0 amappl4 96 3059 0 3022 2 1 1 2 0 8 0 amappl3 88 189 0 184 1 0 1 1 0 8 0 amappl2 80 17264 0 17180 3 1 2 3 0 8 0 amappl1 72 61529 0 61062 25 15 10 20 0 8 0 amappl 80 7479 0 7419 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 18 0 17 1 0 1 1 0 8 0 aobjpl 64 135 0 6 3 0 3 3 0 8 0 uaddrrnd 24 2327 0 2284 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2327 0 2284 1 0 1 1 0 8 0 vmmpekpl 168 22359 0 22315 3 0 3 3 0 8 0 vmmpepl 168 302071 0 299603 222 74 148 148 0 357 39 vmsppl 368 2299 0 2283 2 0 2 2 0 8 0 pdppl 4096 4661 0 4603 8 0 8 8 0 8 0 pvpl 32 803407 0 783228 278 83 195 223 0 265 7 pmappl 232 2326 0 2293 3 1 2 2 0 8 0 extentpl 40 46 0 29 1 0 1 1 0 8 0 phpool 112 701 0 32 20 0 20 20 0 8 0