[Bug binutils/21787] New: Heap-use-after-free in bfd_cache_close

[ned at forallsecure dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=21787

            Bug ID: 21787
           Summary: Heap-use-after-free in bfd_cache_close
           Product: binutils
           Version: 2.30 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: ned at forallsecure dot com
  Target Milestone: ---

Created attachment 10272
  --> https://sourceware.org/bugzilla/attachment.cgi?id=10272&action=edit
testcase

A heap-use-after-free is triggered when the provided file is scanned using
`./objdump -x use-after-free`. All targets must be enabled; I believe the bug
is in the XCOFF archive format.

I used ASAN to detect the crash. If you have trouble reproducing this (valgrind
may work as well, but I haven't checked), let me know.

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