tools/gf_poly.c: fix undefined allocation of 0 bytes
Due to man page of malloc the behaviour in case of allocation size of 0 bytes is undefined: "If size was equal to 0, either NULL or a pointer suitable to be passed to free() is returned" Fix for clang scan-build report: Unix API Undefined allocation of 0 bytes (CERT MEM04-C; CWE-131) 210 poly = (gf_general_t *) malloc(sizeof(gf_general_t)*(n+1)); 9 Call to 'malloc' has an allocation size of 0 bytes Signed-off-by: Danny Al-Gaaf <danny.al-gaaf@bisect.de>master
parent
f6936562b2
commit
3e242830b0
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@ -52,6 +52,7 @@
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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char *BM = "Bad Method: ";
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@ -203,9 +204,14 @@ int main(int argc, char **argv)
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sprintf(string, "Argument '%s' not in proper format of power:coefficient\n", argv[i]);
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usage(string);
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}
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if (power < 0) usage("Can't have negative powers\n");
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if (power > n) n = power;
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if (power < 0) {
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usage("Can't have negative powers\n");
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} else {
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n = power;
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}
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}
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// in case the for-loop header fails
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assert (n >= 0);
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poly = (gf_general_t *) malloc(sizeof(gf_general_t)*(n+1));
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for (i = 0; i <= n; i++) gf_general_set_zero(poly+i, w);
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