GopherProxy

	fix integer overflow check - json2tsv - JSON to TSV converter
	git clone git://git.codemadness.org/json2tsv
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	---
	commit 30c28c0ba7a3bec23f3c964f59aef85a9c2ba615
	parent 79e73bfa51005f9b760c01117f4decce4435fe29
	Author: Hiltjo Posthuma <[email protected]>
	Date: Sun, 13 Oct 2019 14:51:50 +0200

	fix integer overflow check

	Diffstat:
	M json2tsv.c \| 16 ++++++++++------

	1 file changed, 10 insertions(+), 6 deletions(-)
	---
	diff --git a/json2tsv.c b/json2tsv.c
	@@ -81,17 +81,21 @@ capacity(char *value, size_t sz, size_t cur, size_t inc)
	char *newp;

	/* check addition overflow */
	- need = cur + inc;
	- if (cur > SIZE_MAX - need \|\| *sz > SIZE_MAX - 16384) {
	+ if (cur > SIZE_MAX - inc) {
	errno = EOVERFLOW;
	return -1;
	}
	+ need = cur + inc;

	- if (sz == 0 \|\| need > sz) {
	- for (newsiz = *sz; newsiz < need; newsiz += 16384)
	- ;
	+ if (need > *sz) {
	+ if (need > SIZE_MAX - 16384) {
	+ newsiz = SIZE_MAX;
	+ } else {
	+ for (newsiz = *sz; newsiz < need; newsiz += 16384)
	+ ;
	+ }
	if (!(newp = realloc(*value, newsiz)))
	- return -1; /* up to caller to free memory */
	+ return -1; /* up to caller to free value /
	*value = newp;
	*sz = newsiz;
	}