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Diffstat (limited to 'Build/source/texk/web2c/luatexdir/image/writejpg.w')
-rw-r--r--Build/source/texk/web2c/luatexdir/image/writejpg.w5
1 files changed, 4 insertions, 1 deletions
diff --git a/Build/source/texk/web2c/luatexdir/image/writejpg.w b/Build/source/texk/web2c/luatexdir/image/writejpg.w
index bfb218fdc46..7780f312922 100644
--- a/Build/source/texk/web2c/luatexdir/image/writejpg.w
+++ b/Build/source/texk/web2c/luatexdir/image/writejpg.w
@@ -164,7 +164,10 @@ read_APP1_Exif (FILE *fp, unsigned short length, int *xx, int *yy)
double xres = 72.0;
double yres = 72.0;
double res_unit = 1.0;
- fread(buffer, length, 1, fp);
+ size_t ret_len;
+ ret_len = fread(buffer, length, 1, fp);
+ if (ret_len != 1)
+ goto err ;
p = buffer;
while ((p < buffer + length) && (*p == 0))
++p;