URL: <https://savannah.gnu.org/bugs/?66026>
Summary: gsl_linalg_LU_decomp using uninitialized memory
Group: GNU Scientific Library
Submitter: infradig
Submitted: Fri 26 Jul 2024 02:56:44 AM UTC
Category: Runtime error
Severity: 3 - Normal
Operating System: Ubuntu
Status: None
Assigned to: None
Open/Closed: Open
Discussion Lock: Any
Release: 2.8
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Follow-up Comments:
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Date: Fri 26 Jul 2024 02:56:44 AM UTC By: Andrew Davison <infradig>
At line 75 in lu.c the call
gsl_vector_uint * ipiv = gsl_vector_uint_alloc(minMN);
is made. The ipiv vector is then used in a manner that seems to expect zeroed
values. This causes a runtime crash if the circumstances conspire to present
such that the allocated memory is not zeroed. Note: simple tests seem to not
show this problem making it hard to reproduce in a standalone unit test,
sorry.
This problem can be prevented by changing the call to
gsl_vector_uint * ipiv = gsl_vector_uint_calloc(minMN);
instead. In my application tests this now always works.
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