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 *470488 47697 0 0 0x4000000 0 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830bdb5c) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83075144,ffffffff82ff6cbc,69e,ffffffff82fdb9ef) at __assert+0x29 uvm_fault_unwire_locked(fffffd806c35f6f0,20000000,20011000) at uvm_fault_unwire_locked+0x4b4 uvm_fault_unwire(fffffd806c35f6f0,20000000,20011000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1657 kern_sysctl(ffff800037623af4,5,20000100,ffff800037623b28,0,37,5b2ac86baa63fc89) at kern_sysctl+0xc4c sys_sysctl(ffff80002a49c2a0,ffff800037623c60,ffff800037623bb0) at sys_sysctl+0x425 syscall(ffff800037623c60) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd0fe75d8fb0, 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(ffffffff830bdb5c) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83075144,ffffffff82ff6cbc,69e,ffffffff82fdb9ef) at __assert+0x29 uvm_fault_unwire_locked(fffffd806c35f6f0,20000000,20011000) at uvm_fault_unwire_locked+0x4b4 uvm_fault_unwire(fffffd806c35f6f0,20000000,20011000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1657 kern_sysctl(ffff800037623af4,5,20000100,ffff800037623b28,0,37,5b2ac86baa63fc89) at kern_sysctl+0xc4c sys_sysctl(ffff80002a49c2a0,ffff800037623c60,ffff800037623bb0) at sys_sysctl+0x425 syscall(ffff800037623c60) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd0fe75d8fb0, count: -9 ddb> show registers rdi 0 rsi 0x1 rbp 0xffff800037623790 rbx 0x20004000 rdx 0xffff80000125e840 rcx 0 rax 0xffff80002a49c2a0 r8 0 r9 0x8080808080808080 r10 0x7dafe1e02124e86e r11 0xe1e477544b84c1f r12 0 r13 0xffffffff832ebe78 uvm_map_addr_RBT_INFO r14 0 r15 0x1 rip 0xffffffff8147e2b5 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff800037623780 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb> show proc PROC (syz-executor) tid=470488 pid=47697 tcnt=3 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=76, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff80002a49c018,0xffff80002a49cf58 process=0xffff8000327f7378 user=0xffff80003761e000, vmspace=0xfffffd806c35f6f0 estcpu=26, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb> ps PID TID PPID UID S FLAGS WAIT COMMAND 45026 214212 59429 0 2 0 syz-executor 45026 510518 59429 0 3 0x4000080 fsleep syz-executor 47697 245233 68265 0 2 0 syz-executor *47697 470488 68265 0 7 0x4000000 syz-executor 47697 145569 68265 0 2 0x4000000 syz-executor 50180 416934 82365 0 2 0 syz-executor 50180 80207 82365 0 3 0x4000080 fsleep syz-executor 50180 516638 82365 0 3 0x4000080 fsleep syz-executor 9031 269301 94414 0 2 0 syz-executor 9031 379144 94414 0 2 0x4000000 syz-executor 83950 424154 0 0 3 0x14200 bored sosplice 18943 317021 98003 0 2 0x3 syz-executor 10845 190441 98003 0 2 0x2 syz-executor 94414 205286 98003 0 2 0x482 syz-executor 87319 33079 98003 0 3 0x82 wait syz-executor 82365 315240 98003 0 2 0x482 syz-executor 68265 191310 98003 0 2 0x482 syz-executor 73215 188113 98003 0 2 0x2 syz-executor 59429 97685 98003 0 2 0x482 syz-executor 98003 16567 55049 0 3 0x82 kqread syz-executor 55049 81489 94270 0 3 0x10008a sigsusp ksh 94270 180694 70018 0 3 0x98 kqread sshd-session 70018 487114 60115 0 3 0x92 kqread sshd-session 48285 239939 1 0 3 0x100083 ttyin getty 60115 471960 1 0 3 0x88 kqread sshd 93458 184676 74909 73 3 0x1100090 kqread syslogd 74909 36825 1 0 3 0x100082 sbwait syslogd 81668 448279 1 0 3 0x100080 kqread resolvd 11892 237732 63276 77 3 0x100092 kqread dhcpleased 51844 64627 63276 77 3 0x100092 kqread dhcpleased 63276 418348 1 0 3 0x80 kqread dhcpleased 11078 253843 0 0 3 0x14200 bored smr 15890 104974 0 0 2 0x14200 zerothread 32646 302283 0 0 3 0x14200 aiodoned aiodoned 44959 104634 0 0 3 0x14200 syncer update 52076 245813 0 0 3 0x14200 cleaner cleaner 73738 33950 0 0 3 0x14200 reaper reaper 88793 157370 0 0 3 0x14200 pgdaemon pagedaemon 38415 295755 0 0 3 0x14200 bored viomb 28455 311092 0 0 3 0x40014200 acpi0 acpi0 51775 219160 0 0 3 0x14200 bored softnet3 45730 445250 0 0 3 0x14200 bored softnet2 72920 391949 0 0 3 0x14200 bored softnet1 5508 346087 0 0 3 0x14200 bored softnet0 12330 521394 0 0 3 0x14200 bored systqmp 79755 18238 0 0 3 0x14200 bored systq 770 26597 0 0 3 0x40014200 tmoslp softclock 31433 217411 0 0 3 0x40014200 idle0 1 522264 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 10168 11040K 11172K 166960K 11335 0 pcb 17 16K 17K 166960K 48 0 rtable 212 6K 6K 166960K 356 0 pf 28 12K 14K 166960K 34 0 ifaddr 38 6K 7K 166960K 45 0 ifgroup 46 2K 2K 166960K 52 0 sysctl 2 0K 0K 166960K 2 0 counters 29 17K 17K 166960K 31 0 ioctlops 0 0K 4K 166960K 34 0 iov 0 0K 12K 166960K 10 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1364 86K 86K 166960K 1434 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 5K 166960K 4 0 VM map 2 1K 1K 166960K 2 0 sem 4 0K 0K 166960K 9 0 dirhash 12 2K 2K 166960K 12 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 17 61K 97K 166960K 230 0 proc 59 59K 124K 166960K 478 0 subproc 104 6K 6K 166960K 104 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 0 0K 0K 166960K 13 0 in_multi 88 6K 7K 166960K 101 0 ether_multi 1 0K 0K 166960K 1 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 61 281K 281K 166960K 61 0 exec 0 0K 1K 166960K 351 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 209 72K 74K 166960K 3572 0 UVM aobj 12 2K 4K 166960K 13 0 pinsyscall 38 76K 96K 166960K 1243 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 7 0 NDP 10 0K 2K 166960K 28 0 temp 37 6806K 6874K 166960K 8193 0 kqueue 13 20K 26K 166960K 41 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 49 0 46 1 0 1 1 0 8 0 rtentry 112 111 0 12 4 0 4 4 0 8 0 unpcb 144 88 0 73 1 0 1 1 0 8 0 syncache 336 3 0 3 1 1 0 1 0 8 0 tcpcb 808 269 0 264 14 5 9 14 0 8 8 arp 88 18 0 2 1 0 1 1 0 8 0 ipq 40 1 0 0 1 0 1 1 0 8 0 ipqe 40 1 0 0 1 0 1 1 0 8 0 inpcb 336 602 0 594 12 3 9 12 0 8 8 nd6 104 24 0 3 1 0 1 1 0 8 0 pkpcb 40 1 0 1 1 0 1 1 0 8 1 kcovpl 48 8 0 0 1 0 1 1 0 8 0 ppxss 1072 1 0 1 1 0 1 1 0 8 1 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 453 0 44 29 0 29 29 0 8 2 art_table 32 454 0 44 4 0 4 4 0 8 0 art_node 16 110 0 20 1 0 1 1 0 8 0 sysvmsgpl 40 1 0 0 1 0 1 1 0 8 0 semapl 112 6 0 4 1 0 1 1 0 8 0 shmpl 112 10 0 1 1 0 1 1 0 8 0 dirhash 1024 17 0 0 3 0 3 3 0 8 0 dino2pl 256 1707 0 210 95 0 95 95 0 8 0 ffsino 240 1707 0 210 89 0 89 89 0 8 0 nchpl 144 2019 0 346 63 0 63 63 0 8 0 uvmvnodes 80 1850 0 0 38 0 38 38 0 8 0 vnodes 216 1850 0 0 103 0 103 103 0 8 0 namei 1024 6150 0 6150 2 1 1 2 0 8 1 kstatmem 264 24 0 4 2 0 2 2 0 8 0 scsiplug 72 2 0 2 1 0 1 1 0 8 1 scxspl 216 6190 0 6190 10 2 8 8 1 8 8 plimitpl 152 42 0 25 1 0 1 1 0 8 0 sigapl 424 508 0 461 7 1 6 7 0 8 0 futexpl 64 1642 0 1639 1 0 1 1 0 8 0 knotepl 120 5943 0 5896 2 0 2 2 0 8 0 kqueuepl 184 55 0 46 1 0 1 1 0 8 0 pipepl 288 109 0 82 3 0 3 3 0 8 1 fdescpl 432 491 0 462 5 0 5 5 0 8 1 filepl 120 2401 0 2160 12 0 12 12 0 8 4 lockfpl 104 31 0 29 1 0 1 1 0 8 0 lockfspl 48 16 0 14 1 0 1 1 0 8 0 sessionpl 144 21 0 13 1 0 1 1 0 8 0 pgrppl 48 29 0 13 1 0 1 1 0 8 0 ucredpl 104 125 0 113 1 0 1 1 0 8 0 zombiepl 144 532 0 530 2 1 1 1 0 8 0 processpl 1096 508 0 461 4 0 4 4 0 8 0 procpl 648 686 0 633 6 0 6 6 0 8 1 sosppl 168 1 0 1 1 0 1 1 0 8 1 sockpl 504 806 0 780 22 10 12 22 0 8 8 mcl64k 65536 1 0 1 1 0 1 1 0 8 1 mcl16k 16384 4 0 4 1 0 1 1 0 8 1 mcl12k 12288 1 0 1 1 0 1 1 0 8 1 mcl8k 8192 8 0 8 2 1 1 1 0 8 1 mcl4k 4096 2778 0 2727 17 9 8 16 0 8 0 mcl2k 2048 223 0 221 3 0 3 3 0 8 2 mtagpl 96 5 0 4 2 1 1 1 0 8 0 mbufpl 256 5422 0 5256 15 2 13 14 0 8 0 bufpl 280 2426 0 99 167 0 167 167 0 8 0 anonpl 24 158026 0 154937 36 3 33 33 0 187 10 amapchunkpl 152 12049 0 11613 28 0 28 28 0 158 9 amappl16 200 4163 0 4147 6 4 2 5 0 8 0 amappl15 192 9 0 9 1 1 0 1 0 8 0 amappl14 184 119 0 109 1 0 1 1 0 8 0 amappl13 176 19 0 19 1 1 0 1 0 8 0 amappl12 168 1167 0 1140 3 1 2 3 0 8 0 amappl11 160 68 0 58 1 0 1 1 0 8 0 amappl10 152 23 0 23 1 1 0 1 0 8 0 amappl9 144 120 0 120 1 1 0 1 0 8 0 amappl8 136 20 0 19 1 0 1 1 0 8 0 amappl7 128 107 0 96 1 0 1 1 0 8 0 amappl6 120 157 0 155 1 0 1 1 0 8 0 amappl5 112 127 0 119 1 0 1 1 0 8 0 amappl4 104 273 0 259 1 0 1 1 0 8 0 amappl3 96 2264 0 2182 3 0 3 3 0 8 0 amappl2 88 761 0 686 2 0 2 2 0 8 0 amappl1 80 7433 0 6926 13 0 13 13 0 8 2 amappl 88 3226 0 3073 5 0 5 5 0 92 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma1024 1024 1 0 0 1 0 1 1 0 8 0 dma256 256 6 0 6 1 1 0 1 0 8 0 dma128 128 254 0 254 2 1 1 1 0 8 1 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 72 12 0 1 1 0 1 1 0 8 0 uaddrrnd 24 491 0 462 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 491 0 462 1 0 1 1 0 8 0 vmmpekpl 168 5353 0 5322 2 0 2 2 0 8 0 vmmpepl 168 38977 0 37354 78 0 78 78 0 357 0 vmsppl 352 490 0 462 4 0 4 4 0 8 1 rwobjpl 24 17311 0 14632 17 0 17 17 0 8 0 pdppl 4096 988 0 924 100 34 66 82 0 8 2 pvpl 32 291196 0 282989 91 0 91 91 0 265 13 pmappl 216 490 0 462 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 413 0 68 11 0 11 11 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(ffffffff830bdb5c) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83075144,ffffffff82ff6cbc,69e,ffffffff82fdb9ef) at __assert+0x29 uvm_fault_unwire_locked(fffffd806c35f6f0,20000000,20011000) at uvm_fault_unwire_locked+0x4b4 uvm_fault_unwire(fffffd806c35f6f0,20000000,20011000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1657 kern_sysctl(ffff800037623af4,5,20000100,ffff800037623b28,0,37,5b2ac86baa63fc89) at kern_sysctl+0xc4c sys_sysctl(ffff80002a49c2a0,ffff800037623c60,ffff800037623bb0) at sys_sysctl+0x425 syscall(ffff800037623c60) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd0fe75d8fb0, 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(ffffffff830bdb5c) at panic+0x1cf sys/kern/subr_prf.c:198 __assert(ffffffff83075144,ffffffff82ff6cbc,69e,ffffffff82fdb9ef) at __assert+0x29 uvm_fault_unwire_locked(fffffd806c35f6f0,20000000,20011000) at uvm_fault_unwire_locked+0x4b4 uvm_fault_unwire(fffffd806c35f6f0,20000000,20011000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1657 kern_sysctl(ffff800037623af4,5,20000100,ffff800037623b28,0,37,5b2ac86baa63fc89) at kern_sysctl+0xc4c sys_sysctl(ffff80002a49c2a0,ffff800037623c60,ffff800037623bb0) at sys_sysctl+0x425 syscall(ffff800037623c60) at syscall+0x97e sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xd0fe75d8fb0, count: -9