panic: kernel diagnostic assertion "va >= entry->start" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_fault.c", line 1694 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *187596 89566 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830bd66e) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83074a24,ffffffff82ff90ec,69e,ffffffff82fde95b) at __assert+0x29 uvm_fault_unwire_locked(fffffd806a1e5598,20000000,20011000) at uvm_fault_unwire_locked+0x4b4 uvm_fault_unwire(fffffd806a1e5598,20000000,20011000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1657 kern_sysctl(ffff800037625314,5,20000100,ffff800037625348,0,37,a383e70bc6623676) at kern_sysctl+0xc4c sys_sysctl(ffff80002a51ca60,ffff800037625480,ffff8000376253d0) at sys_sysctl+0x425 syscall(ffff800037625480) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcd91101f480, count: 6 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> ddb> set $lines = 0 ddb> set $maxwidth = 0 ddb> show panic *cpu0: kernel diagnostic assertion "va >= entry->start" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_fault.c", line 1694 ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830bd66e) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83074a24,ffffffff82ff90ec,69e,ffffffff82fde95b) at __assert+0x29 uvm_fault_unwire_locked(fffffd806a1e5598,20000000,20011000) at uvm_fault_unwire_locked+0x4b4 uvm_fault_unwire(fffffd806a1e5598,20000000,20011000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1657 kern_sysctl(ffff800037625314,5,20000100,ffff800037625348,0,37,a383e70bc6623676) at kern_sysctl+0xc4c sys_sysctl(ffff80002a51ca60,ffff800037625480,ffff8000376253d0) at sys_sysctl+0x425 syscall(ffff800037625480) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcd91101f480, count: -9 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800037624fb0 rbx 0x20004000 rdx 0xffff8000012a5b80 rcx 0 rax 0xffff80002a51ca60 r8 0x101010101010101 r9 0x8080808080808080 r10 0xe99517881b446fa2 r11 0xe3f859fe0edcaf68 r12 0 r13 0xffffffff831dccb8 uvm_map_addr_RBT_INFO r14 0 r15 0x1 rip 0xffffffff820d1525 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037624fa0 ss 0 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=187596 pid=89566 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=84, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a51cf70,0xffff80002a51dc28 process=0xffff8000327f4cf0 user=0xffff800037620000, vmspace=0xfffffd806a1e5598 estcpu=34, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 38967 423957 41632 0 2 0 syz-executor 38967 462105 41632 0 3 0x4000080 fsleep syz-executor 89566 278612 44268 0 2 0 syz-executor *89566 187596 44268 0 7 0x4000000 syz-executor 89566 126356 44268 0 2 0x4000000 syz-executor 83683 56284 22907 0 2 0 syz-executor 83683 316338 22907 0 3 0x4000080 fsleep syz-executor 83683 261962 22907 0 3 0x4000080 fsleep syz-executor 83683 226004 22907 0 3 0x4000080 fsleep syz-executor 33066 468451 21992 0 2 0x2 syz-executor 56072 301332 21992 0 2 0x3 syz-executor 44268 170332 21992 0 3 0x82 nanoslp syz-executor 9471 64043 0 0 3 0x14280 nfsidl nfsio 58984 12227 0 0 3 0x14280 nfsidl nfsio 94022 151444 0 0 3 0x14280 nfsidl nfsio 60488 312136 0 0 3 0x14280 nfsidl nfsio 91168 13606 0 0 3 0x14280 nfsidl nfsio 40692 214973 0 0 3 0x14280 nfsidl nfsio 72384 423613 0 0 3 0x14280 nfsidl nfsio 65802 355956 0 0 3 0x14280 nfsidl nfsio 20226 192819 0 0 3 0x14280 nfsidl nfsio 99002 517202 0 0 3 0x14280 nfsidl nfsio 48518 308331 0 0 3 0x14280 nfsidl nfsio 41859 74619 0 0 3 0x14280 nfsidl nfsio 73952 451392 0 0 3 0x14280 nfsidl nfsio 77109 1880 0 0 3 0x14280 nfsidl nfsio 63440 185530 0 0 3 0x14280 nfsidl nfsio 85456 468890 0 0 3 0x14280 nfsidl nfsio 1379 257996 0 0 3 0x14280 nfsidl nfsio 20683 126599 0 0 3 0x14280 nfsidl nfsio 77239 140397 0 0 3 0x14280 nfsidl nfsio 8381 212363 0 0 3 0x14280 nfsidl nfsio 30548 473346 21992 0 2 0x2 syz-executor 24101 98329 0 0 3 0x14200 bored sosplice 22907 18932 21992 0 3 0x82 nanoslp syz-executor 3967 419555 21992 0 3 0x82 wait syz-executor 23239 236264 21992 0 2 0x2 syz-executor 41632 59145 21992 0 3 0x82 nanoslp syz-executor 21992 94552 50424 0 3 0x82 kqread syz-executor 50424 503378 1821 0 3 0x10008a sigsusp ksh 1821 79156 51289 0 3 0x98 kqread sshd-session 51289 330266 45471 0 3 0x92 kqread sshd-session 86195 407315 1 0 3 0x100083 ttyin getty 45471 143254 1 0 3 0x88 kqread sshd 65187 391930 66299 73 3 0x1100090 kqread syslogd 66299 469389 1 0 3 0x100082 sbwait syslogd 53710 369590 1 0 3 0x100080 kqread resolvd 27196 64182 42547 77 3 0x100092 kqread dhcpleased 97903 184842 42547 77 3 0x100092 kqread dhcpleased 42547 306986 1 0 3 0x80 kqread dhcpleased 78677 195560 0 0 3 0x14200 bored smr 42375 243118 0 0 2 0x14200 zerothread 6292 121193 0 0 3 0x14200 aiodoned aiodoned 97858 447171 0 0 3 0x14200 syncer update 9277 83853 0 0 3 0x14200 cleaner cleaner 62263 206183 0 0 3 0x14200 reaper reaper 67161 401978 0 0 3 0x14200 pgdaemon pagedaemon 81526 407035 0 0 3 0x14200 bored viomb 78490 257605 0 0 3 0x40014200 acpi0 acpi0 86258 121094 0 0 3 0x14200 bored softnet3 60269 99135 0 0 3 0x14200 bored softnet2 83430 502051 0 0 3 0x14200 bored softnet1 42486 451020 0 0 3 0x14200 bored softnet0 37645 197323 0 0 3 0x14200 bored systqmp 63198 382448 0 0 3 0x14200 bored systq 25941 269473 0 0 2 0x40014200 softclock 83792 254802 0 0 3 0x40014200 idle0 1 520964 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb> show all locks No such command ddb> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10209 11137K 11660K 166960K 15440 0 pcb 17 20K 22K 166960K 1149 0 rtable 188 6K 8K 166960K 841 0 pf 32 13K 21K 166960K 115 0 ifaddr 37 6K 8K 166960K 104 0 ifgroup 51 2K 2K 166960K 152 0 sysctl 4 1K 1K 166960K 10 0 counters 30 17K 17K 166960K 59 0 ioctlops 0 0K 4K 166960K 353 0 iov 0 0K 24K 166960K 165 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1545 97K 98K 166960K 3938 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 46 0 VM map 2 1K 1K 166960K 2 0 sem 12 0K 1K 166960K 189 0 dirhash 12 2K 2K 166960K 57 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 15 53K 93K 166960K 2407 0 sigio 0 0K 0K 166960K 97 0 proc 61 59K 108K 166960K 832 0 subproc 104 6K 6K 166960K 183 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 663 0 in_multi 84 6K 7K 166960K 257 0 ether_multi 1 0K 0K 166960K 26 0 mrt 1 0K 0K 166960K 14 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 247 1102K 1102K 166960K 247 0 exec 0 0K 1K 166960K 764 0 fusefs mount 1 32K 32K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 206 71K 90K 166960K 24844 0 UVM aobj 103 6K 7K 166960K 112 0 pinsyscall 36 72K 94K 166960K 3571 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 1K 166960K 133 0 NDP 11 0K 2K 166960K 75 0 temp 77 6820K 6902K 166960K 94619 0 kqueue 13 20K 30K 166960K 423 0 SYN cache 2 16K 16K 166960K 2 0 ddb> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle rtpcb 120 354 0 349 4 1 3 3 0 8 2 rtentry 112 237 0 153 4 0 4 4 0 8 0 unpcb 144 2176 0 2158 16 10 6 6 0 8 5 syncache 336 4 0 4 1 1 0 1 0 8 0 tcpcb 808 1344 0 1340 24 15 9 14 0 8 8 arp 88 53 0 38 1 0 1 1 0 8 0 ipq 40 11 0 9 1 0 1 1 0 8 0 ipqe 40 26 0 24 1 0 1 1 0 8 0 inpcb 336 4249 0 4237 40 30 10 18 0 8 8 nd6 104 54 0 31 1 0 1 1 0 8 0 pkpcb 40 109 0 109 3 2 1 1 0 8 1 kcovpl 48 14 0 6 1 0 1 1 0 8 0 ppxss 1072 11 0 11 3 2 1 1 0 8 1 pfanchor 1288 2 0 0 1 0 1 1 0 8 0 pftag 88 1 0 1 1 1 0 1 0 8 0 pfrule 1344 4 0 4 1 1 0 1 0 8 0 art_heap8 4096 3 0 0 3 0 3 3 0 8 0 art_heap4 256 919 0 535 35 4 31 31 0 8 2 art_table 32 922 0 535 4 0 4 4 0 8 0 art_node 16 229 0 156 1 0 1 1 0 8 0 sysvmsgpl 40 18 0 14 2 1 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 184 0 174 1 0 1 1 0 8 0 shmpl 112 109 0 9 3 0 3 3 0 8 0 dirhash 1024 47 0 30 3 0 3 3 0 8 0 dino2pl 256 5827 0 4332 95 0 95 95 0 8 0 ffsino 240 5827 0 4332 89 0 89 89 0 8 0 nchpl 144 9270 0 7579 64 0 64 64 0 8 1 uvmvnodes 80 5927 0 0 121 0 121 121 0 8 0 vnodes 216 5927 0 0 330 0 330 330 0 8 0 namei 1024 33916 0 33914 5 2 3 3 0 8 2 kstatmem 264 80 0 58 2 0 2 2 0 8 0 acpiwqpl 32 1 0 1 1 0 1 1 1 8 1 scsiplug 72 12 0 12 3 2 1 1 0 8 1 scxspl 216 26923 0 26923 11 9 2 8 1 8 2 plimitpl 152 689 0 673 1 0 1 1 0 8 0 sigapl 424 2692 0 2627 8 0 8 8 0 8 0 futexpl 64 36013 0 36009 1 0 1 1 0 8 0 knotepl 120 117739 0 117692 43 33 10 17 0 8 7 kqueuepl 184 716 0 704 4 3 1 4 0 8 0 pipepl 288 348 0 321 5 2 3 5 0 8 0 fdescpl 432 2654 0 2627 5 1 4 5 0 8 0 filepl 120 21207 0 20956 25 9 16 16 0 8 7 lockfpl 104 1076 0 1074 3 1 2 2 0 8 1 lockfspl 48 282 0 280 1 0 1 1 0 8 0 sessionpl 144 28 0 20 1 0 1 1 0 8 0 pgrppl 48 63 0 47 1 0 1 1 0 8 0 ucredpl 104 4014 0 4003 1 0 1 1 0 8 0 zombiepl 144 3631 0 3629 2 1 1 1 0 8 0 processpl 1096 2692 0 2627 5 0 5 5 0 8 0 procpl 648 6706 0 6635 9 1 8 8 0 8 0 sosppl 168 17 0 17 3 2 1 1 0 8 1 sockpl 504 6937 0 6902 127 114 13 38 0 8 7 mcl64k 65536 36 0 36 3 2 1 1 0 8 1 mcl16k 16384 4 0 4 2 1 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl9k 9216 3 0 3 2 1 1 1 0 8 1 mcl8k 8192 24 0 24 3 2 1 1 0 8 1 mcl4k 4096 6037 0 5986 16 8 8 15 0 8 1 mcl2k 2048 2704 0 2696 6 3 3 4 0 8 1 mtagpl 96 233 0 210 3 0 3 3 0 8 1 mbufpl 256 31660 0 31542 131 109 22 116 0 8 8 bufpl 280 7976 0 1729 447 0 447 447 0 8 0 anonpl 24 421479 0 418330 106 60 46 69 0 187 13 amapchunkpl 152 97628 0 97207 58 23 35 35 0 158 13 amappl16 200 10495 0 10463 64 50 14 27 0 8 8 amappl15 192 30 0 30 1 1 0 1 0 8 0 amappl14 184 120 0 110 1 0 1 1 0 8 0 amappl13 176 17 0 17 1 1 0 1 0 8 0 amappl12 168 3349 0 3322 2 0 2 2 0 8 0 amappl11 160 45 0 35 1 0 1 1 0 8 0 amappl10 152 13 0 13 2 2 0 1 0 8 0 amappl9 144 126 0 126 1 1 0 1 0 8 0 amappl8 136 22 0 21 1 0 1 1 0 8 0 amappl7 128 110 0 100 1 0 1 1 0 8 0 amappl6 120 217 0 215 1 0 1 1 0 8 0 amappl5 112 148 0 139 1 0 1 1 0 8 0 amappl4 104 313 0 298 1 0 1 1 0 8 0 amappl3 96 15091 0 15010 3 0 3 3 0 8 0 amappl2 88 2937 0 2861 2 0 2 2 0 8 0 amappl1 80 14568 0 14058 13 1 12 13 0 8 0 amappl 88 24252 0 24101 5 0 5 5 0 92 0 dma8192 8192 3 0 3 2 1 1 1 0 8 1 dma4096 4096 2 0 2 1 1 0 1 0 8 0 dma1024 1024 2 0 1 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 259 0 259 2 2 0 1 0 8 0 dma64 64 7 0 7 2 2 0 1 0 8 0 dma32 32 10 0 10 2 2 0 1 0 8 0 dma16 16 19 0 18 1 0 1 1 0 8 0 aobjpl 72 111 0 9 2 0 2 2 0 8 0 uaddrrnd 24 2654 0 2627 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 2654 0 2627 1 0 1 1 0 8 0 vmmpekpl 168 20719 0 20667 3 0 3 3 0 8 0 vmmpepl 168 168357 0 166741 116 26 90 99 0 357 10 vmsppl 352 2653 0 2627 4 1 3 4 0 8 0 rwobjpl 24 52093 0 45219 44 0 44 44 0 8 0 pdppl 4096 5314 0 5254 150 84 66 80 0 8 6 pvpl 32 1123079 0 1114671 201 87 114 143 0 265 24 pmappl 216 2653 0 2627 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 743 0 380 13 0 13 13 0 8 0 ddb> machine ddbcpu 0 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830bd66e) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83074a24,ffffffff82ff90ec,69e,ffffffff82fde95b) at __assert+0x29 uvm_fault_unwire_locked(fffffd806a1e5598,20000000,20011000) at uvm_fault_unwire_locked+0x4b4 uvm_fault_unwire(fffffd806a1e5598,20000000,20011000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1657 kern_sysctl(ffff800037625314,5,20000100,ffff800037625348,0,37,a383e70bc6623676) at kern_sysctl+0xc4c sys_sysctl(ffff80002a51ca60,ffff800037625480,ffff8000376253d0) at sys_sysctl+0x425 syscall(ffff800037625480) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcd91101f480, count: -9 ddb> machine ddbcpu 1 No such command ddb> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830bd66e) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83074a24,ffffffff82ff90ec,69e,ffffffff82fde95b) at __assert+0x29 uvm_fault_unwire_locked(fffffd806a1e5598,20000000,20011000) at uvm_fault_unwire_locked+0x4b4 uvm_fault_unwire(fffffd806a1e5598,20000000,20011000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1657 kern_sysctl(ffff800037625314,5,20000100,ffff800037625348,0,37,a383e70bc6623676) at kern_sysctl+0xc4c sys_sysctl(ffff80002a51ca60,ffff800037625480,ffff8000376253d0) at sys_sysctl+0x425 syscall(ffff800037625480) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xcd91101f480, count: -9