panic: kernel diagnostic assertion "va >= entry->start" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_fault.c", line 1694 Stopped at db_enter+0x25: addq $0x8,%rsp TID PID UID PRFLAGS PFLAGS CPU COMMAND *199114 66666 0 0 0x4000000 0K syz-executor 495105 60342 0 0 0 1 syz-executor db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830f3f4b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff830a7f95,ffffffff8304c6b7,69e,ffffffff8300e20b) at __assert+0x29 uvm_fault_unwire_locked(fffffd806a8fb8e8,20000000,20010000) at uvm_fault_unwire_locked+0x4b4 uvm_fault_unwire(fffffd806a8fb8e8,20000000,20010000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1657 kern_sysctl(ffff8000371c4914,2,20000100,ffff8000371c4948,0,37,29d1b8aefe9492b2) at kern_sysctl+0x500 sysctl_vsunlock sys/kern/kern_sysctl.c:209 [inline] kern_sysctl(ffff8000371c4914,2,20000100,ffff8000371c4948,0,37,29d1b8aefe9492b2) at kern_sysctl+0x500 sys/kern/kern_sysctl.c:508 sys_sysctl(ffff80002a090a60,ffff8000371c4a80,ffff8000371c49d0) at sys_sysctl+0x425 syscall(ffff8000371c4a80) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371c4a80) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfb23e23e710, 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{0}> ddb{0}> set $lines = 0 ddb{0}> set $maxwidth = 0 ddb{0}> show panic *cpu0: kernel diagnostic assertion "va >= entry->start" failed: file "/syzkaller/managers/multicore/kernel/sys/uvm/uvm_fault.c", line 1694 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830f3f4b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff830a7f95,ffffffff8304c6b7,69e,ffffffff8300e20b) at __assert+0x29 uvm_fault_unwire_locked(fffffd806a8fb8e8,20000000,20010000) at uvm_fault_unwire_locked+0x4b4 uvm_fault_unwire(fffffd806a8fb8e8,20000000,20010000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1657 kern_sysctl(ffff8000371c4914,2,20000100,ffff8000371c4948,0,37,29d1b8aefe9492b2) at kern_sysctl+0x500 sysctl_vsunlock sys/kern/kern_sysctl.c:209 [inline] kern_sysctl(ffff8000371c4914,2,20000100,ffff8000371c4948,0,37,29d1b8aefe9492b2) at kern_sysctl+0x500 sys/kern/kern_sysctl.c:508 sys_sysctl(ffff80002a090a60,ffff8000371c4a80,ffff8000371c49d0) at sys_sysctl+0x425 syscall(ffff8000371c4a80) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371c4a80) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfb23e23e710, count: -9 ddb{0}> show registers rdi 0 rsi 0x1 rbp 0xffff8000371c45a0 rbx 0xffffffff834a0dbf cpu_info_full_primary+0x2dbf rdx 0 rcx 0xffff80002a090a60 rax 0xffffffff8349fff0 cpu_info_full_primary+0x1ff0 r8 0x101010101010101 r9 0x8080808080808080 r10 0x72209b669139e6d4 r11 0x404db346401c76a5 r12 0xffffffff834a0bc0 cpu_info_full_primary+0x2bc0 r13 0 r14 0 r15 0x1 rip 0xffffffff81610e15 db_enter+0x25 cs 0x8 rflags 0x246 rsp 0xffff8000371c4590 ss 0x10 db_enter+0x25: addq $0x8,%rsp ddb{0}> show proc PROC (syz-executor) tid=199114 pid=66666 tcnt=4 stat=onproc flags process=0 proc=4000000 runpri=36, usrpri=50, slppri=36, nice=20 wchan=0x0, wmesg=, ps_single=0x0 scnt=0 ecnt=0 forw=0xffffffffffffffff, list=0xffff8000ffff76e8,0xffffffff835f1e20 process=0xffff8000fffeb1d8 user=0xffff8000371bf000, vmspace=0xfffffd806a8fb8e8 estcpu=36, cpticks=1, pctcpu=0.0, user=0, sys=1, intr=0 ddb{0}> ps PID TID PPID UID S FLAGS WAIT COMMAND 66666 276033 80405 0 2 0 syz-executor 66666 79737 80405 0 3 0x4000080 fsleep syz-executor 66666 301496 80405 0 2 0x4000000 syz-executor *66666 199114 80405 0 7 0x4000000 syz-executor 60342 495105 9832 0 7 0 syz-executor 60342 510906 9832 0 2 0x4000000 syz-executor 25307 48658 4641 0 2 0 syz-executor 25307 480349 4641 0 3 0x4000080 fsleep syz-executor 25307 99132 4641 0 3 0x4000080 fsleep syz-executor 58636 424586 26763 0 2 0 syz-executor 58636 445182 26763 0 2 0x4000000 syz-executor 58636 45761 26763 0 3 0x4000080 fsleep syz-executor 58636 60619 26763 0 2 0x4000000 syz-executor 48849 260292 75598 0 2 0 syz-executor 48849 417047 75598 0 3 0x4000080 ttyout syz-executor 48849 36660 75598 0 3 0x4000080 ttyout syz-executor 48849 441594 75598 0 2 0x4000000 syz-executor 46270 83938 64058 0 2 0 syz-executor 46270 456766 64058 0 3 0x4000080 fsleep syz-executor 46270 155319 64058 0 3 0x4000080 fsleep syz-executor 80927 520421 75773 0 2 0x3 syz-executor 20452 231118 0 0 3 0x14200 acct acct 39804 519091 1 0 3 0x100083 ttyin getty 4641 206589 75773 0 3 0x82 nanoslp syz-executor 64058 135759 75773 0 2 0x3 syz-executor 14567 84673 0 0 3 0x14280 nfsidl nfsio 70745 473306 0 0 3 0x14280 nfsidl nfsio 26948 380224 0 0 3 0x14280 nfsidl nfsio 70516 279037 0 0 3 0x14280 nfsidl nfsio 25900 400423 0 0 3 0x14280 nfsidl nfsio 67600 430090 0 0 3 0x14280 nfsidl nfsio 63914 288852 0 0 3 0x14280 nfsidl nfsio 40368 63502 0 0 3 0x14280 nfsidl nfsio 99993 324196 0 0 3 0x14280 nfsidl nfsio 21487 241988 0 0 3 0x14280 nfsidl nfsio 78869 437967 0 0 3 0x14280 nfsidl nfsio 98508 499829 0 0 3 0x14280 nfsidl nfsio 97867 452506 0 0 3 0x14280 nfsidl nfsio 63767 220406 0 0 3 0x14280 nfsidl nfsio 89117 479201 0 0 3 0x14280 nfsidl nfsio 9705 183981 0 0 3 0x14280 nfsidl nfsio 74781 296368 0 0 3 0x14280 nfsidl nfsio 77316 282911 0 0 3 0x14280 nfsidl nfsio 950 6052 0 0 3 0x14280 nfsidl nfsio 53010 18950 0 0 3 0x14280 nfsidl nfsio 79348 225022 0 0 3 0x14200 bored sosplice 14666 455962 82599 0 3 0x100082 sbwait ndp 82599 115654 6478 0 3 0x10008a sigsusp sh 26763 491623 75773 0 2 0x2 syz-executor 6478 162446 75773 0 3 0x82 wait syz-executor 9832 496621 75773 0 2 0x3 syz-executor 80405 229973 75773 0 3 0x82 nanoslp syz-executor 75598 40459 75773 0 2 0x3 syz-executor 75773 140594 43638 0 2 0x3 syz-executor 43638 381579 65627 0 3 0x10008a sigsusp ksh 65627 417079 17342 0 3 0x98 kqread sshd-session 17342 308771 25592 0 3 0x92 kqread sshd-session 25592 405404 1 0 3 0x88 kqread sshd 90464 89113 9501 74 3 0x1100092 bpf pflogd 9501 481222 1 0 3 0x80 sbwait pflogd 30540 484257 23832 73 3 0x1100090 kqread syslogd 23832 479018 1 0 3 0x100082 sbwait syslogd 50861 518466 1 0 3 0x100080 kqread resolvd 52580 420314 60257 77 3 0x100092 kqread dhcpleased 11882 181166 60257 77 3 0x100092 kqread dhcpleased 60257 141044 1 0 3 0x80 kqread dhcpleased 29429 162199 0 0 3 0x14200 bored smr 62466 459728 0 0 2 0x14200 zerothread 69027 244066 0 0 3 0x14200 aiodoned aiodoned 34678 48018 0 0 3 0x14200 syncer update 66665 49769 0 0 3 0x14200 cleaner cleaner 68775 397948 0 0 3 0x14200 reaper reaper 59904 338664 0 0 3 0x14200 pgdaemon pagedaemon 7183 392384 0 0 3 0x14200 bored viomb 92433 507534 0 0 3 0x40014200 acpi0 acpi0 85795 508486 0 0 3 0x40014200 idle1 4344 273954 0 0 3 0x14200 bored softnet3 40283 467035 0 0 3 0x14200 bored softnet2 90201 128102 0 0 3 0x14200 bored softnet1 37268 487748 0 0 3 0x14200 bored softnet0 86370 3831 0 0 3 0x14200 bored systqmp 85875 461012 0 0 3 0x14200 bored systq 56720 420162 0 0 3 0x14200 tmoslp softclockmp 1114 338189 0 0 3 0x40014200 tmoslp softclock 22431 333179 0 0 3 0x40014200 idle0 1 406485 0 0 3 0x82 wait init 0 0 -1 0 3 0x10200 scheduler swapper ddb{0}> show all locks Process 66666 (syz-executor) thread 0xffff80002a090a60 (199114) Process 60342 (syz-executor) thread 0xffff800036390a50 (510906) Process 58636 (syz-executor) thread 0xffff8000ffff67b8 (445182) Process 48849 (syz-executor) thread 0xffff8000363916f8 (441594) ddb{0}> show malloc Type InUse MemUse HighUse Limit Requests Type Lim devbuf 10214 11117K 11508K 166960K 13090 0 pcb 20 15K 16K 166960K 208 0 rtable 179 6K 7K 166960K 614 0 pf 37 18K 18K 166960K 89 0 ifaddr 38 6K 7K 166960K 80 0 ifgroup 59 2K 2K 166960K 110 0 sysctl 3 0K 0K 166960K 3 0 counters 66 36K 36K 166960K 102 0 ioctlops 0 0K 4K 166960K 1679 0 iov 0 0K 16K 166960K 57 0 mount 1 1K 1K 166960K 1 0 log 0 0K 0K 166960K 4 0 vnodes 1535 96K 97K 166960K 2510 0 UFS quota 1 32K 32K 166960K 1 0 UFS mount 5 36K 36K 166960K 5 0 shm 2 1K 9K 166960K 15 0 VM map 2 1K 1K 166960K 2 0 sem 21 5K 6K 166960K 58 0 dirhash 12 2K 2K 166960K 24 0 ACPI 1690 195K 286K 166960K 12468 0 file desc 18 65K 93K 166960K 1082 0 sigio 0 0K 0K 166960K 151 0 proc 72 91K 128K 166960K 730 0 subproc 104 6K 6K 166960K 156 0 NFS srvsock 1 0K 0K 166960K 1 0 NFS daemon 1 16K 16K 166960K 1 0 ip_moptions 1 0K 0K 166960K 102 0 in_multi 76 5K 7K 166960K 163 0 ether_multi 1 0K 0K 166960K 4 0 mrt 0 0K 0K 166960K 2 0 ISOFS mount 1 32K 32K 166960K 1 0 MSDOSFS mount 1 16K 16K 166960K 1 0 ttys 175 784K 784K 166960K 175 0 exec 0 0K 1K 166960K 512 0 fusefs mount 1 32K 32K 166960K 1 0 pfkey data 0 0K 0K 166960K 1 0 tdb 3 0K 0K 166960K 3 0 VM swap 8 62K 64K 166960K 10 0 UVM amap 249 73K 88K 166960K 11806 0 UVM aobj 26 4K 4K 166960K 28 0 pinsyscall 44 88K 103K 166960K 2274 0 memdesc 1 4K 4K 166960K 1 0 crypto data 1 1K 1K 166960K 1 0 ip6_options 0 0K 0K 166960K 39 0 NDP 13 0K 2K 166960K 55 0 temp 70 6826K 6892K 166960K 43438 0 kqueue 13 20K 28K 166960K 161 0 SYN cache 2 16K 16K 166960K 2 0 ddb{0}> show all pools Name Size Requests Fail Releases Pgreq Pgrel Npage Hiwat Minpg Maxpg Idle plcache 128 24 0 0 1 0 1 1 0 8 0 rtpcb 120 116 0 112 2 1 1 2 0 8 0 rtentry 112 175 0 96 4 1 3 4 0 8 0 unpcb 144 915 0 890 7 3 4 6 0 8 3 syncache 336 7 0 7 2 1 1 1 0 8 1 tcpqe 32 4 0 4 2 1 1 1 0 8 1 tcpcb 808 378 0 369 11 9 2 8 0 8 0 arp 120 31 0 15 1 0 1 1 0 8 0 inpcb 336 1503 0 1421 24 11 13 13 0 8 6 nd6 136 41 0 23 1 0 1 1 0 8 0 pkpcb 40 3 0 3 2 2 0 1 0 8 0 kcovpl 48 12 0 4 1 0 1 1 0 8 0 ppxss 1168 11 0 11 3 2 1 1 0 8 1 pfstscr 40 1 0 1 1 1 0 1 0 8 0 pffrag 232 6 0 2 1 0 1 1 0 482 0 pffrnode 88 6 0 2 1 0 1 1 0 8 0 pffrent 40 9 0 5 1 0 1 1 0 8 0 pfosfp 40 1428 0 1005 5 0 5 5 0 8 0 pfosfpen 112 1428 0 714 21 0 21 21 0 8 0 pfstitem 24 67 0 21 1 0 1 1 0 8 0 pfstkey 128 69 0 23 2 0 2 2 0 8 0 pfstate 376 67 0 22 5 0 5 5 0 8 0 pfrule 1344 21 0 15 2 0 2 2 0 8 0 art_heap8 4096 1 0 0 1 0 1 1 0 8 0 art_heap4 256 680 0 343 30 8 22 29 0 8 0 art_table 32 681 0 343 4 0 4 4 0 8 0 art_node 16 172 0 103 1 0 1 1 0 8 0 sysvmsgpl 40 17 0 11 1 0 1 1 0 8 0 semupl 112 1 0 1 1 1 0 1 0 8 0 semapl 112 50 0 31 1 0 1 1 0 8 0 shmpl 112 25 0 2 1 0 1 1 0 8 0 dirhash 1024 25 0 8 3 0 3 3 0 8 0 dino2pl 256 3256 0 1749 95 0 95 95 0 8 0 ffsino 272 3256 0 1749 102 0 102 102 0 8 0 nchpl 144 4711 0 3016 63 0 63 63 0 8 0 uvmvnodes 80 4133 0 0 85 0 85 85 0 8 0 vnodes 216 4133 0 0 230 0 230 230 0 8 0 namei 1024 15974 0 15974 4 3 1 2 0 8 1 percpumem 16 65 0 18 1 0 1 1 0 8 0 kstatmem 264 62 0 36 2 0 2 2 0 8 0 scsiplug 72 8 0 8 2 1 1 1 0 8 1 scxspl 216 13743 0 13743 11 10 1 8 1 8 1 plimitpl 152 265 0 248 1 0 1 1 0 8 0 sigapl 424 1399 0 1327 10 1 9 9 0 8 0 futexpl 64 13709 0 13703 1 0 1 1 0 8 0 knotepl 120 561 0 0 17 0 17 17 0 8 0 kqueuepl 216 258 0 249 2 1 1 2 0 8 0 pipepl 320 353 0 326 9 5 4 8 0 8 1 fdescpl 496 1358 0 1326 5 0 5 5 0 8 0 filepl 152 8818 0 8559 26 12 14 20 0 8 1 lockfpl 104 361 0 358 1 0 1 1 0 8 0 lockfspl 48 126 0 123 1 0 1 1 0 8 0 sessionpl 144 30 0 21 1 0 1 1 0 8 0 pgrppl 48 113 0 96 1 0 1 1 0 8 0 ucredpl 104 1482 0 1469 1 0 1 1 0 8 0 zombiepl 144 1523 0 1523 1 0 1 1 0 8 1 processpl 1160 1399 0 1327 6 0 6 6 0 8 0 procpl 648 2996 0 2910 9 1 8 8 0 8 0 srpgc 96 18 0 18 1 1 0 1 0 8 0 sosppl 168 6 0 6 3 3 0 1 0 8 0 sockpl 664 2552 0 2440 27 12 15 15 0 8 5 mcl64k 65536 4 0 0 1 0 1 1 0 8 0 mcl16k 16384 3 0 0 1 0 1 1 0 8 0 mcl9k 9216 2 0 0 1 0 1 1 0 8 0 mcl8k 8192 6 0 0 1 0 1 1 0 8 0 mcl4k 4096 142 0 0 18 0 18 18 0 8 0 mcl2k 2048 32 0 0 4 0 4 4 0 8 0 mtagpl 96 11 0 0 1 0 1 1 0 8 0 mbufpl 256 339 0 0 22 0 22 22 0 8 0 bufpl 280 5022 0 101 352 0 352 352 0 8 0 anonpl 24 237730 0 231834 68 8 60 61 0 185 13 amapchunkpl 152 38925 0 38351 34 2 32 32 0 158 5 amappl16 200 5426 0 5330 25 7 18 18 0 8 8 amappl15 192 14 0 13 1 0 1 1 0 8 0 amappl14 184 161 0 148 1 0 1 1 0 8 0 amappl13 176 21 0 21 1 1 0 1 0 8 0 amappl12 168 2074 0 2041 3 1 2 2 0 8 0 amappl11 160 58 0 44 1 0 1 1 0 8 0 amappl10 152 10 0 10 2 2 0 1 0 8 0 amappl9 144 141 0 141 1 1 0 1 0 8 0 amappl8 136 31 0 28 1 0 1 1 0 8 0 amappl7 128 118 0 104 1 0 1 1 0 8 0 amappl6 120 205 0 202 1 0 1 1 0 8 0 amappl5 112 147 0 135 1 0 1 1 0 8 0 amappl4 104 337 0 314 1 0 1 1 0 8 0 amappl3 96 7104 0 7005 3 0 3 3 0 8 0 amappl2 88 1670 0 1581 3 0 3 3 0 8 0 amappl1 80 11344 0 10750 14 0 14 14 0 8 0 amappl 88 11306 0 11123 5 0 5 5 0 92 0 dma32768 32768 1 0 1 1 1 0 1 0 8 0 dma4096 4096 1 0 1 1 1 0 1 0 8 0 dma2048 2048 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 128 256 0 256 4 4 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 19 0 18 1 0 1 1 0 8 0 aobjpl 72 27 0 2 1 0 1 1 0 8 0 uaddrrnd 24 1358 0 1326 1 0 1 1 0 8 0 uaddrbest 32 2 0 0 1 0 1 1 0 8 0 uaddr 24 1358 0 1326 1 0 1 1 0 8 0 vmmpekpl 168 12730 0 12683 3 0 3 3 0 8 0 vmmpepl 168 90384 0 88394 105 5 100 101 0 357 6 vmsppl 448 1357 0 1326 6 1 5 5 0 8 0 rwobjpl 56 31110 0 25886 77 1 76 76 0 8 1 pdppl 4096 2723 0 2652 115 42 73 85 0 8 2 pvpl 32 16548 0 0 136 2 134 134 0 265 0 pmappl 248 1357 0 1326 3 0 3 3 0 8 0 extentpl 40 55 0 38 1 0 1 1 0 8 0 phpool 112 448 0 81 11 0 11 11 0 8 0 ddb{0}> machine ddbcpu 0 Invalid cpu 0 ddb{0}> trace db_enter() at db_enter+0x25 sys/arch/amd64/amd64/db_interface.c:437 panic(ffffffff830f3f4b) at panic+0x1e5 sys/kern/subr_prf.c:198 __assert(ffffffff830a7f95,ffffffff8304c6b7,69e,ffffffff8300e20b) at __assert+0x29 uvm_fault_unwire_locked(fffffd806a8fb8e8,20000000,20010000) at uvm_fault_unwire_locked+0x4b4 uvm_fault_unwire(fffffd806a8fb8e8,20000000,20010000) at uvm_fault_unwire+0x55 sys/uvm/uvm_fault.c:1657 kern_sysctl(ffff8000371c4914,2,20000100,ffff8000371c4948,0,37,29d1b8aefe9492b2) at kern_sysctl+0x500 sysctl_vsunlock sys/kern/kern_sysctl.c:209 [inline] kern_sysctl(ffff8000371c4914,2,20000100,ffff8000371c4948,0,37,29d1b8aefe9492b2) at kern_sysctl+0x500 sys/kern/kern_sysctl.c:508 sys_sysctl(ffff80002a090a60,ffff8000371c4a80,ffff8000371c49d0) at sys_sysctl+0x425 syscall(ffff8000371c4a80) at syscall+0xbb6 mi_syscall sys/sys/syscall_mi.h:178 [inline] syscall(ffff8000371c4a80) at syscall+0xbb6 sys/arch/amd64/amd64/trap.c:577 Xsyscall() at Xsyscall+0x128 end of kernel end trace frame: 0xfb23e23e710, count: -9 ddb{0}> machine ddbcpu 1 Stopped at x86_ipi_db+0x27: addq $0x8,%rsp x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x788bedf47880, count: 12 ddb{1}> trace x86_ipi_db(ffff800029b7bff0) at x86_ipi_db+0x27 sys/arch/amd64/amd64/db_interface.c:393 x86_ipi_handler() at x86_ipi_handler+0xd9 sys/arch/amd64/amd64/ipi.c:106 Xresume_lapic_ipi() at Xresume_lapic_ipi+0x27 end of kernel end trace frame: 0x788bedf47880, count: -3