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preproc: make sure the mmacro params list is NULL-terminated

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If we adjust nparams due to default or greedy arguments, we need to
re-terminate the params[] array.

Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin (Intel) 2019-08-20 16:24:46 -07:00
parent d4607846a4
commit 7eb18213b7
1 changed files with 6 additions and 1 deletions
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7
asm/preproc.c
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@ -5138,7 +5138,6 @@ static MMacro *is_mmacro(Token * tline, int *nparamp, Token ***params_array)
memcpy(&params[nparam+1], &m->defaults[nparam+1-m->nparam_min],
(newnparam - nparam) * sizeof(*params));
nparam = newnparam;
params[nparam+1] = NULL;
}
/*
* If we've gone over the maximum parameter count (and
@ -5148,6 +5147,12 @@ static MMacro *is_mmacro(Token * tline, int *nparamp, Token ***params_array)
if (m->plus && nparam > m->nparam_max)
nparam = m->nparam_max;
/*
* If nparam was adjusted above, make sure the list is still
* NULL-terminated.
*/
params[nparam+1] = NULL;
/* Done! */
*params_array = params;
*nparamp = nparam;