[Nasm-bugs] [Bug 3392742] New: segv fault in preproc.c

[noreply-nasm at dev.nasm.us]

https://bugzilla.nasm.us/show_bug.cgi?id=3392742

            Bug ID: 3392742
           Summary: segv fault in preproc.c
           Product: NASM
           Version: 2.16 (development)
          Hardware: All
                OS: All
            Status: OPEN
          Severity: normal
          Priority: Medium
         Component: Assembler
          Assignee: nobody at nasm.us
          Reporter: dz1833006 at smail.nju.edu.cn
                CC: chang.seok.bae at intel.com, gorcunov at gmail.com,
                    hpa at zytor.com, nasm-bugs at nasm.us
     Obtained from: Built from git using configure

Created attachment 411811
  --> https://bugzilla.nasm.us/attachment.cgi?id=411811&action=edit
poc file

Version: github-master branch commit:6d95cc8 (2021.2.22)

Cmd: nasm poc -o tmp

Build options: 

1. sh autogen.sh
2. CC=clang CXX=clang++ CFLAGS="-fsanitize=address" ./configure --enable-gdb
3. make

ASAN:

==113890==ERROR: AddressSanitizer: SEGV on unknown address 0x000000000000 (pc
0x000000553517 bp 0x7fffc59cb270 sp 0x7fffc59c9e00 T0)
==113890==The signal is caused by a READ memory access.
==113890==Hint: address points to the zero page.
    #0 0x553517 in do_directive /nasm/nasm-master/asm/preproc.c:4336:29
    #1 0x536b3a in pp_tokline /nasm/nasm-master/asm/preproc.c:7258:13
    #2 0x534ad9 in pp_getline /nasm/nasm-master/asm/preproc.c:7322:17
    #3 0x4f0937 in assemble_file /nasm/nasm-master/asm/nasm.c:1722:24
    #4 0x4eed0d in main /nasm/nasm-master/asm/nasm.c:717:9
    #5 0x7fa9666e20b2 in __libc_start_main
/build/glibc-ZN95T4/glibc-2.31/csu/../csu/libc-start.c:308:16
    #6 0x41c42d in _start (/nasm/nasm-master/nasm+0x41c42d)

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