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Merge pull request #67 from mapbox/overflow

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Fix buffer overflow in length of temporary file names
This commit is contained in:
Eric Fischer 2015-07-10 10:27:39 -07:00
commit 506c801c65
1 changed files with 5 additions and 1 deletions
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6
tile.cc
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@ -8,6 +8,7 @@
#include <algorithm>
#include <stdio.h>
#include <unistd.h>
#include <limits.h>
#include <zlib.h>
#include <sys/stat.h>
#include <sys/types.h>
@ -27,6 +28,9 @@ extern "C" {
#define CMD_BITS 3
#define XSTRINGIFY(s) STRINGIFY(s)
#define STRINGIFY(s) #s
// https://github.com/mapbox/mapnik-vector-tile/blob/master/src/vector_tile_compression.hpp
static inline int compress(std::string const &input, std::string &output) {
z_stream deflate_s;
@ -793,7 +797,7 @@ int traverse_zooms(int *geomfd, off_t *geom_size, char *metabase, char *stringpo
int subfd[(1 << MAX_ZOOM_INCREMENT) * (1 << MAX_ZOOM_INCREMENT)];
int j;
for (j = 0; j < (1 << MAX_ZOOM_INCREMENT) * (1 << MAX_ZOOM_INCREMENT); j++) {
char geomname[strlen(tmpdir) + strlen("/geom2.XXXXXXXX") + 1];
char geomname[strlen(tmpdir) + strlen("/geom.XXXXXXXX" XSTRINGIFY(INT_MAX)) + 1];
sprintf(geomname, "%s/geom%d.XXXXXXXX", tmpdir, j);
subfd[j] = mkstemp(geomname);
// printf("%s\n", geomname);