[Nasm-bugs] [Bug 3392495] New: Undetected "je short literal-number" byte overflow

[noreply-nasm at gorcunov.org]

https://bugzilla.nasm.us/show_bug.cgi?id=3392495

            Bug ID: 3392495
           Summary: Undetected "je short literal-number" byte overflow
           Product: NASM
           Version: 2.13.xx
          Hardware: Other x86
                OS: Other Unix
            Status: OPEN
          Severity: normal
          Priority: Medium
         Component: Assembler
          Assignee: nobody at nasm.us
          Reporter: sethsimon at sdf.org
                CC: gorcunov at gmail.com, hpa at zytor.com, nasm-bugs at nasm.us
     Obtained from: From OS distribution

~$ nasm --version
NASM version 2.13.03 compiled on Mar 27 2018
~$ cat test.asm
je short 0x300
~$ nasm -f bin -o test.com test.asm
~$ ndisasm test.com
00000000  74FE              jz 0x0

On the other hand, if a label is used, NASM detects the error:
~$ cat test.asm
je short foo
times 0x300 - 2 db 0
foo:
~$ nasm -f bin -o test.com test.asm
test.asm:1: error: short jump is out of range
test.asm:1: warning: byte data exceeds bounds [-w+number-overflow]

This may or may not be related to #3392273.

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