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Re: Question about the function timespec_cmp in timespec.h
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From: |
Pádraig Brady |
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Subject: |
Re: Question about the function timespec_cmp in timespec.h |
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Date: |
Tue, 09 Dec 2014 09:00:02 +0000 |
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User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 |
On 09/12/14 01:50, Dingbao Xie wrote:
> Dear maintainer,
> I tried to test the latest version of coreutils with klee.
> klee reported an integer overflow in function
> timespec_cmp (located in file timespec.h)
> when a.tv_sec=0, b.tv_sec=0, a.tv_nsec=0, b.tv_nsec=LONG_MIN.
>
> But I failed to reproduce it with the test case produced by klee.
> Is it possible to trigger such overflow?
The tv_nsec values are constrained to values such that
the subtraction can not overflow. Details are in the
comment above that function.
thanks,
Pádraig.