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Potential Integer Overflow in lrslib.c #8

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KSB21ST opened this issue Sep 3, 2021 · 1 comment

KSB21ST commented Sep 3, 2021 •

edited

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It seems that there exists a potential integer overflow. Please find the following description:

nlinearity can be an arbitrary large number

lrslib/lrslib.c

Line 4247 in 784a793

if(fscanf (lrs_ifp, "%ld", &nlinearity)==EOF )
Call to calloc with the large number can cause a memory allocation with an overflowed size

lrslib/lrslib.c

Line 4258 in 784a793

Q->linearity = (long int*) CALLOC ((nlinearity + 1), sizeof (long));

lrslib/lrslib.h

Line 163 in 784a793

#define CALLOC(n,s) xcalloc(n,s,__LINE__,__FILE__)

lrslib/lrsgmp.c

Line 435 in 784a793

tmp = calloc (n, s);

Owner

mkoeppe commented Sep 3, 2021

I have notified the upstream authors

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