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[Bug binutils/26375] New: A memory leak in get_data


From: 15664243668 at 163 dot com
Subject: [Bug binutils/26375] New: A memory leak in get_data
Date: Wed, 12 Aug 2020 10:22:24 +0000

https://sourceware.org/bugzilla/show_bug.cgi?id=26375

            Bug ID: 26375
           Summary: A memory leak in get_data
           Product: binutils
           Version: 2.34
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: 15664243668 at 163 dot com
  Target Milestone: ---

Created attachment 12764
  --> https://sourceware.org/bugzilla/attachment.cgi?id=12764&action=edit
PoC

I have found a memory leak in get_data of Binutils-2.34. This bug is triggered
as
$./readelf -a PoC
I compile the binutils-2.34 to the 64-bit LSB version with AddressSanitizer in
Ubuntu 16.04 and print the debug information.

=================================================================
==30101==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 2053 byte(s) in 1 object(s) allocated from:
    #0 0x7f390d037b40 in __interceptor_malloc
(/usr/lib/x86_64-linux-gnu/libasan.so.4+0xdeb40)
    #1 0x55f13c7587a3 in get_data
/home/ubuntu/yuetai/test_programs/binutils-2.34/binutils/readelf.c:439
    #2 0x55f13c9f254f 
(/home/ubuntu/yuetai/test_programs/binutils-2.34/binutils-install/bin/readelf+0x39554f)

SUMMARY: AddressSanitizer: 2053 byte(s) leaked in 1 allocation(s).

The PoC file is in attachment.

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