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diff --git a/third_party/libtiff/tif_dirread.c b/third_party/libtiff/tif_dirread.c
index bc4102184..0e3f8ccd4 100644
--- a/third_party/libtiff/tif_dirread.c
+++ b/third_party/libtiff/tif_dirread.c
@@ -4983,6 +4983,11 @@ TIFFFetchNormalTag(TIFF* tif, TIFFDirEntry* dp, int recover)
if (err==TIFFReadDirEntryErrOk)
{
int m;
+ if( dp->tdir_count > 0 && data[dp->tdir_count-1] != '\0' )
+ {
+ TIFFWarningExt(tif->tif_clientdata,module,"ASCII value for tag \"%s\" does not end in null byte. Forcing it to be null",fip->field_name);
+ data[dp->tdir_count-1] = '\0';
+ }
m=TIFFSetField(tif,dp->tdir_tag,(uint16)(dp->tdir_count),data);
if (data!=0)
_TIFFfree(data);
@@ -5155,6 +5160,11 @@ TIFFFetchNormalTag(TIFF* tif, TIFFDirEntry* dp, int recover)
if (err==TIFFReadDirEntryErrOk)
{
int m;
+ if( dp->tdir_count > 0 && data[dp->tdir_count-1] != '\0' )
+ {
+ TIFFWarningExt(tif->tif_clientdata,module,"ASCII value for tag \"%s\" does not end in null byte. Forcing it to be null",fip->field_name);
+ data[dp->tdir_count-1] = '\0';
+ }
m=TIFFSetField(tif,dp->tdir_tag,(uint32)(dp->tdir_count),data);
if (data!=0)
_TIFFfree(data);
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