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https://bugs.gentoo.org/848807
Fix incorrect length args to snprintf.
Upstream bug: https://sourceforge.net/p/giflib/bugs/170/
--- a/giftext.c
+++ b/giftext.c
@@ -442,7 +442,7 @@
for (i = 1; i <= Len; i++) {
(void)snprintf(&HexForm[CrntPlace * 3], 3, " %02x",
Extension[i]);
- (void)snprintf(&AsciiForm[CrntPlace], 3, "%c",
+ (void)snprintf(&AsciiForm[CrntPlace], 2, "%c",
MAKE_PRINTABLE(Extension[i]));
if (++CrntPlace == 16) {
HexForm[CrntPlace * 3] = 0;
@@ -488,7 +488,7 @@
for (i = 0; i < Len; i++) {
(void)snprintf(&HexForm[CrntPlace * 3], 3, " %02x",
PixelBlock[i]);
- (void)snprintf(&AsciiForm[CrntPlace], 3, "%c",
+ (void)snprintf(&AsciiForm[CrntPlace], 2, "%c",
MAKE_PRINTABLE(PixelBlock[i]));
if (++CrntPlace == 16) {
HexForm[CrntPlace * 3] = 0;
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