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[Bug binutils/21813] Additional undefined behavior and crashes

From: yzhan219 at stevens dot edu
Subject: [Bug binutils/21813] Additional undefined behavior and crashes
Date: Fri, 02 Jul 2021 15:27:54 +0000


yzhan219 at stevens dot edu changed:

           What    |Removed                     |Added
                 CC|                            |yzhan219 at stevens dot edu

--- Comment #6 from yzhan219 at stevens dot edu ---
(In reply to Ned Williamson from comment #0)
> Created attachment 10281 [details]
> 5 testcases with asan output
> I've found 5 more bugs in objdump master branch.
> These bugs repro for me when building for all targets with a recent version
> of clang and AddressSanitizer and running them with `./objdump -xg testcase`
> (one crash requires debug output).
> If any don't reproduce, let me know and I can try to identify another
> testcase or help identify the root cause. I've included `asan_output` with
> my stacktrace for each test.
> I have investigated alpha-heap-overflow, and there the fix is to check that
> `PRIV (recrd.rec_size) > test_len` before reading the remaining record.
> Cheers,
> Ned

Hi Ned,

I tried to reproduce the crashed by using the test cases you provide. But none
of them works, objdump says "objdump: debug_oob_read: File format not
recognized". Could you please check if you have other test cases? Thank you so


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