login: panic: kernel diagnostic assertion "next != NULL && next->start <= entry->end" failed: file "/syzkaller/managers/main/kernel/sys/uvm/uvm_fault.c", line 1354
Stopped at      db_enter+0xa:   popq    %rbp
    TID    PID    UID     PRFLAGS     PFLAGS  CPU  COMMAND
*474751  97424      0           0  0x4000000    0  syz-executor0
db_enter() at db_enter+0xa
panic() at panic+0x147
__assert(ffffffff81012464,ffff80002117db50,20006000,20011000) at __assert+0x24
uvm_fault_unwire_locked(20000000,20011000,0) at uvm_fault_unwire_locked+0x1f9
uvm_fault_unwire(10000,ffffff006076b000,10000) at uvm_fault_unwire+0x3b
physio(ffff80002117de48,ffffff006d1a8d80,ffffff006d1a8d80,ffff80002117de48,ffff80002117dd18) at physio+0x2ba
spec_read(0) at spec_read+0x9d
VOP_READ(ffff80002117de48,ffffff006d1a8d80,ffffff0068cdfda8,0) at VOP_READ+0x5e
vn_read(ffffff0068cdfda8,ffff8000ffffc710,fffffe73) at vn_read+0x130
dofilereadv(ffff8000ffffc710,ffff80002117def0,fffffe73,ffff80002117df08,c283a1f6428) at dofilereadv+0x14f
sys_read(ffff80002117df90,ffff8000ffffc710,ffff80002105f330) at sys_read+0x6e
syscall(0) at syscall+0x3e4
Xsyscall(6,0,ffffffffffffffb7,0,3,c25b6dec010) at Xsyscall+0x128
end of kernel
end trace frame: 0xc283a1f64b0, count: 2
https://www.openbsd.org/ddb.html describes the minimum info required in bug