[Bug binutils/30951] New: Null pointer dereference in ldlex.l

[shiyuyuranzh at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30951

            Bug ID: 30951
           Summary: Null pointer dereference in ldlex.l
           Product: binutils
           Version: 2.41
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: shiyuyuranzh at gmail dot com
  Target Milestone: ---

Created attachment 15159
  --> https://sourceware.org/bugzilla/attachment.cgi?id=15159&action=edit
the detailed information of the bug

Hi, I found a null pointer dereference bug in the source code of binutils, and
I have shown the execution sequence below. This bug exists in the file
/ld/ldlex.l. The white text illustrates the steps that generate the bug.
The return value of YY_CURRENT_BUFFER can be null, then it dereferenced at line
659 without checking if it is null.The detailed instrunctions are in the
attachment.

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