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Code Issues 1 Projects Releases Wiki Activity

exiftag: catch buffer mapping failure

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Might be what caused:

Coverity 1139734
This commit is contained in:
Vincent Penquerc'h 2014-04-16 11:43:40 +01:00
parent 13954ce3e5
commit 22e12979ee
1 changed files with 53 additions and 15 deletions
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68
gst-libs/gst/tag/gstexiftag.c
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@ -920,9 +920,12 @@ write_exif_undefined_tag_from_taglist (GstExifWriter * writer,
if (G_VALUE_TYPE (value) == GST_TYPE_SAMPLE) {
sample = gst_value_get_sample (value);
buf = gst_sample_get_buffer (sample);
gst_buffer_map (buf, &info, GST_MAP_READ);
data = info.data;
size = info.size;
if (gst_buffer_map (buf, &info, GST_MAP_READ)) {
data = info.data;
size = info.size;
} else {
GST_WARNING ("Failed to map buffer for reading");
}
} else {
GST_WARNING ("Conversion from %s to raw data not supported",
G_VALUE_TYPE_NAME (value));
@ -1230,7 +1233,10 @@ parse_exif_ascii_tag (GstExifReader * reader, const GstExifTagMatch * tag,
real_offset = offset - reader->base_offset;
gst_buffer_map (reader->buffer, &info, GST_MAP_READ);
if (!gst_buffer_map (reader->buffer, &info, GST_MAP_READ)) {
GST_WARNING ("Failed to map buffer for reading");
return;
}
if (real_offset >= info.size) {
GST_WARNING ("Invalid offset %u for buffer of size %" G_GSIZE_FORMAT
", not adding tag %s", real_offset, info.size, tag->gst_tag);
@ -1329,7 +1335,10 @@ parse_exif_undefined_tag (GstExifReader * reader, const GstExifTagMatch * tag,
real_offset = offset - reader->base_offset;
gst_buffer_map (reader->buffer, &info, GST_MAP_READ);
if (!gst_buffer_map (reader->buffer, &info, GST_MAP_READ)) {
GST_WARNING ("Failed to map buffer for reading");
return;
}
if (real_offset >= info.size) {
GST_WARNING ("Invalid offset %u for buffer of size %" G_GSIZE_FORMAT
@ -1395,7 +1404,10 @@ exif_reader_read_rational_tag (GstExifReader * exif_reader,
real_offset = offset - exif_reader->base_offset;
gst_buffer_map (exif_reader->buffer, &info, GST_MAP_READ);
if (!gst_buffer_map (exif_reader->buffer, &info, GST_MAP_READ)) {
GST_WARNING ("Failed to map buffer for reading");
return FALSE;
}
if (real_offset >= info.size) {
GST_WARNING ("Invalid offset %u for buffer of size %" G_GSIZE_FORMAT,
@ -1551,10 +1563,15 @@ write_exif_ifd (const GstTagList * taglist, guint byte_order,
EXIF_TYPE_LONG, 1,
gst_byte_writer_get_size (&writer.datawriter), NULL);
gst_buffer_map (inner_ifd, &info, GST_MAP_READ);
handled &=
gst_byte_writer_put_data (&writer.datawriter, info.data, info.size);
gst_buffer_unmap (inner_ifd, &info);
if (gst_buffer_map (inner_ifd, &info, GST_MAP_READ)) {
handled &=
gst_byte_writer_put_data (&writer.datawriter, info.data,
info.size);
gst_buffer_unmap (inner_ifd, &info);
} else {
GST_WARNING ("Failed to map buffer for reading");
handled = FALSE;
}
gst_buffer_unref (inner_ifd);
}
continue;
@ -1637,7 +1654,10 @@ parse_exif_ifd (GstExifReader * exif_reader, gint buf_offset,
g_return_val_if_fail (exif_reader->byte_order == G_LITTLE_ENDIAN
|| exif_reader->byte_order == G_BIG_ENDIAN, FALSE);
gst_buffer_map (exif_reader->buffer, &info, GST_MAP_READ);
if (!gst_buffer_map (exif_reader->buffer, &info, GST_MAP_READ)) {
GST_WARNING ("Failed to map buffer for reading");
return FALSE;
}
gst_byte_reader_init (&reader, info.data, info.size);
if (!gst_byte_reader_set_pos (&reader, buf_offset))
@ -1811,7 +1831,11 @@ gst_tag_list_to_exif_buffer_with_tiff_header (const GstTagList * taglist)
return NULL;
}
gst_buffer_map (ifd, &info, GST_MAP_READ);
if (!gst_buffer_map (ifd, &info, GST_MAP_READ)) {
GST_WARNING ("Failed to map buffer for reading");
gst_buffer_unref (ifd);
return NULL;
}
/* TODO what is the correct endianness here? */
gst_byte_writer_init_with_size (&writer, info.size + TIFF_HEADER_SIZE, FALSE);
@ -1904,7 +1928,10 @@ gst_tag_list_from_exif_buffer_with_tiff_header (GstBuffer * buffer)
GstBuffer *subbuffer;
GstMapInfo info, sinfo;
gst_buffer_map (buffer, &info, GST_MAP_READ);
if (!gst_buffer_map (buffer, &info, GST_MAP_READ)) {
GST_WARNING ("Failed to map buffer for reading");
return NULL;
}
GST_LOG ("Parsing exif tags with tiff header of size %" G_GSIZE_FORMAT,
info.size);
@ -1932,7 +1959,9 @@ gst_tag_list_from_exif_buffer_with_tiff_header (GstBuffer * buffer)
subbuffer = gst_buffer_new_and_alloc (info.size - (TIFF_HEADER_SIZE - 2));
gst_buffer_map (subbuffer, &sinfo, GST_MAP_WRITE);
if (!gst_buffer_map (subbuffer, &sinfo, GST_MAP_WRITE))
goto map_failed;
memcpy (sinfo.data, info.data + TIFF_HEADER_SIZE,
info.size - TIFF_HEADER_SIZE);
gst_buffer_unmap (subbuffer, &sinfo);
@ -1947,6 +1976,12 @@ done:
return taglist;
map_failed:
{
GST_WARNING ("Failed to map buffer for writing");
gst_buffer_unref (subbuffer);
goto done;
}
byte_reader_fail:
{
GST_WARNING ("Failed to read values from buffer");
@ -2117,7 +2152,10 @@ deserialize_geo_coordinate (GstExifReader * exif_reader,
return ret;
}
gst_buffer_map (exif_reader->buffer, &info, GST_MAP_READ);
if (!gst_buffer_map (exif_reader->buffer, &info, GST_MAP_READ)) {
GST_WARNING ("Failed to map buffer for reading");
return ret;
}
/* now parse the fractions */
gst_byte_reader_init (&fractions_reader, info.data, info.size);