backport of:
From bd94a9b383d8755a27b5a1bc27660b8ad10b094c Mon Sep 17 00:00:00 2001
From: Su_Laus <sulau@freenet.de>
Date: Mon, 22 Aug 2022 09:35:48 +0200
Subject: [PATCH] tiffcrop subroutines require a larger buffer (fixes #271,
#381, #386, #388, #389, #435)
Buffer overflows have been fixed by making the buffers at least 3 bytes larger than the image itself needs.
This is required for some tiffcrop conversion subroutines.
In addition, some integer casting warnings have been fixed.
Closes issues #271, #381, #386, #388, #389 and #435.
---
tools/tiffcrop.c | 211 ++++++++++++++++++++++++++---------------------
1 file changed, 119 insertions(+), 92 deletions(-)
diff --git a/tools/tiffcrop.c b/tools/tiffcrop.c
index 8fd856dc..39ce639d 100644
--- a/tools/tiffcrop.c
+++ b/tools/tiffcrop.c
@@ -210,6 +210,10 @@ static char tiffcrop_rev_date[] = "15-08-2022";
#define TIFF_DIR_MAX 65534
+/* Some conversion subroutines require image buffers, which are at least 3 bytes
+ * larger than the necessary size for the image itself. */
+#define NUM_BUFF_OVERSIZE_BYTES 3
+
/* Offsets into buffer for margins and fixed width and length segments */
struct offset {
uint32 tmargin;
@@ -231,7 +235,7 @@ struct offset {
*/
struct buffinfo {
- uint32 size; /* size of this buffer */
+ uint64 size; /* size of this buffer */
unsigned char *buffer; /* address of the allocated buffer */
};
@@ -805,8 +809,8 @@ static int readContigTilesIntoBuffer (TIFF* in, uint8_t* buf,
uint32 dst_rowsize, shift_width;
uint32 bytes_per_sample, bytes_per_pixel;
uint32 trailing_bits, prev_trailing_bits;
- uint32 tile_rowsize = TIFFTileRowSize(in);
- uint32 src_offset, dst_offset;
+ uint64 tile_rowsize = TIFFTileRowSize(in);
+ uint64 src_offset, dst_offset;
uint32 row_offset, col_offset;
uint8 *bufp = (uint8*) buf;
unsigned char *src = NULL;
@@ -856,7 +860,7 @@ static int readContigTilesIntoBuffer (TIFF* in, uint8_t* buf,
TIFFError("readContigTilesIntoBuffer", "Integer overflow when calculating buffer size.");
exit(EXIT_FAILURE);
}
- tilebuf = limitMalloc(tile_buffsize + 3);
+ tilebuf = limitMalloc(tile_buffsize + NUM_BUFF_OVERSIZE_BYTES);
if (tilebuf == 0)
return 0;
tilebuf[tile_buffsize] = 0;
@@ -1019,7 +1023,7 @@ static int readSeparateTilesIntoBuffer (TIFF* in, uint8_t *obuf,
for (sample = 0; (sample < spp) && (sample < MAX_SAMPLES); sample++)
{
srcbuffs[sample] = NULL;
- tbuff = (unsigned char *)limitMalloc(tilesize + 8);
+ tbuff = (unsigned char *)limitMalloc(tilesize + NUM_BUFF_OVERSIZE_BYTES);
if (!tbuff)
{
TIFFError ("readSeparateTilesIntoBuffer",
@@ -1187,7 +1187,8 @@ writeBufferToSeparateStrips (TIFF* out, uint8_t* buf,
tsample_t s;
tstrip_t strip = 0;
tsize_t stripsize = TIFFStripSize(out);
- tsize_t rowstripsize, scanlinesize = TIFFScanlineSize(out);
+ tsize_t rowstripsize;
+ uint64 scanlinesize = TIFFScanlineSize(out);
tsize_t total_bytes = 0;
tdata_t obuf;
@@ -1212,7 +1216,8 @@ writeBufferToSeparateStrips (TIFF* out, uint8_t* buf,
}
rowstripsize = rowsperstrip * bytes_per_sample * (width + 1);
- obuf = limitMalloc (rowstripsize);
+ /* Add 3 padding bytes for extractContigSamples32bits */
+ obuf = limitMalloc (rowstripsize + NUM_BUFF_OVERSIZE_BYTES);
if (obuf == NULL)
return 1;
@@ -1224,7 +1229,7 @@ writeBufferToSeparateStrips (TIFF* out, uint8_t* buf,
stripsize = TIFFVStripSize(out, nrows);
src = buf + (row * rowsize);
total_bytes += stripsize;
- memset (obuf, '\0', rowstripsize);
+ memset (obuf, '\0',rowstripsize + NUM_BUFF_OVERSIZE_BYTES);
if (extractContigSamplesToBuffer(obuf, src, nrows, width, s, spp, bps, dump))
{
_TIFFfree(obuf);
@@ -1232,10 +1237,15 @@ writeBufferToSeparateStrips (TIFF* out, uint8_t* buf,
}
if ((dump->outfile != NULL) && (dump->level == 1))
{
- dump_info(dump->outfile, dump->format,"",
+ if (scanlinesize > 0x0ffffffffULL) {
+ dump_info(dump->infile, dump->format, "loadImage",
+ "Attention: scanlinesize %llu is larger than UINT32_MAX.\nFollowing dump might be wrong.",
+ scanlinesize);
+ }
+ dump_info(dump->outfile, dump->format,"",
"Sample %2d, Strip: %2d, bytes: %4d, Row %4d, bytes: %4d, Input offset: %6d",
- s + 1, strip + 1, stripsize, row + 1, scanlinesize, src - buf);
- dump_buffer(dump->outfile, dump->format, nrows, scanlinesize, row, obuf);
+ s + 1, strip + 1, stripsize, row + 1, (uint32)scanlinesize, src - buf);
+ dump_buffer(dump->outfile, dump->format, nrows, (uint32)scanlinesize, row, obuf);
}
if (TIFFWriteEncodedStrip(out, strip++, obuf, stripsize) < 0)
@@ -1262,7 +1272,7 @@ static int writeBufferToContigTiles (TIFF* out, uint8_t* buf, uint32_t imageleng
uint32 tl, tw;
uint32 row, col, nrow, ncol;
uint32 src_rowsize, col_offset;
- uint32 tile_rowsize = TIFFTileRowSize(out);
+ uint64 tile_rowsize = TIFFTileRowSize(out);
uint8* bufp = (uint8*) buf;
tsize_t tile_buffsize = 0;
tsize_t tilesize = TIFFTileSize(out);
@@ -1305,9 +1315,11 @@ static int writeBufferToContigTiles (TIFF* out, uint8_t* buf, uint32_t imageleng
}
src_rowsize = ((imagewidth * spp * bps) + 7U) / 8;
- tilebuf = limitMalloc(tile_buffsize);
+ /* Add 3 padding bytes for extractContigSamples32bits */
+ tilebuf = limitMalloc(tile_buffsize + NUM_BUFF_OVERSIZE_BYTES);
if (tilebuf == 0)
return 1;
+ memset(tilebuf, 0, tile_buffsize + NUM_BUFF_OVERSIZE_BYTES);
for (row = 0; row < imagelength; row += tl)
{
nrow = (row + tl > imagelength) ? imagelength - row : tl;
@@ -1353,7 +1365,8 @@ static int writeBufferToSeparateTiles (TIFF* out, uint8_t* buf, uint32_t imagele
uint32 imagewidth, tsample_t spp,
struct dump_opts * dump)
{
- tdata_t obuf = limitMalloc(TIFFTileSize(out));
+ /* Add 3 padding bytes for extractContigSamples32bits */
+ tdata_t obuf = limitMalloc(TIFFTileSize(out) + NUM_BUFF_OVERSIZE_BYTES);
uint32 tl, tw;
uint32 row, col, nrow, ncol;
uint32 src_rowsize, col_offset;
@@ -1363,6 +1376,7 @@ static int writeBufferToSeparateTiles (TIFF* out, uint8_t* buf, uint32_t imagele
if (obuf == NULL)
return 1;
+ memset(obuf, 0, TIFFTileSize(out) + NUM_BUFF_OVERSIZE_BYTES);
if( !TIFFGetField(out, TIFFTAG_TILELENGTH, &tl) ||
!TIFFGetField(out, TIFFTAG_TILEWIDTH, &tw) ||
@@ -1788,14 +1802,14 @@ void process_command_opts (int argc, char *argv[], char *mp, char *mode, uint32
*opt_offset = '\0';
/* convert option to lowercase */
- end = strlen (opt_ptr);
+ end = (unsigned int)strlen (opt_ptr);
for (i = 0; i < end; i++)
*(opt_ptr + i) = tolower((int) *(opt_ptr + i));
/* Look for dump format specification */
if (strncmp(opt_ptr, "for", 3) == 0)
{
/* convert value to lowercase */
- end = strlen (opt_offset + 1);
+ end = (unsigned int)strlen (opt_offset + 1);
for (i = 1; i <= end; i++)
*(opt_offset + i) = tolower((int) *(opt_offset + i));
/* check dump format value */
@@ -2138,7 +2152,7 @@ void process_command_opts (int argc, char *argv[], char *mp, char *mode, uint32
R = (crop_data->crop_mode & CROP_REGIONS) ? 1 : 0;
S = (page->mode & PAGE_MODE_ROWSCOLS) ? 1 : 0;
if (XY + Z + R + S > 1) {
- TIFFError("tiffcrop input error", "The crop options(-X|-Y), -Z, -z and -S are mutually exclusive.->Exit");
+ TIFFError("tiffcrop input error", "The crop options(-X|-Y), -Z, -z and -S are mutually exclusive.->exit");
exit(EXIT_FAILURE);
}
} /* end process_command_opts */
@@ -2257,6 +2271,8 @@ main(int argc, char* argv[])
size_t length;
char temp_filename[PATH_MAX + 16]; /* Extra space keeps the compiler from complaining */
+ assert(NUM_BUFF_OVERSIZE_BYTES >= 3);
+
little_endian = *((unsigned char *)&little_endian) & '1';
initImageData(&image);
@@ -3807,10 +3823,10 @@ extractContigSamplesToTileBuffer(uint8_t *out, uint8_t *in, uint32_t rows, uint3
static int readContigStripsIntoBuffer (TIFF* in, uint8* buf)
{
uint8* bufp = buf;
- int32 bytes_read = 0;
+ int64 bytes_read = 0;
uint32 strip, nstrips = TIFFNumberOfStrips(in);
- uint32 stripsize = TIFFStripSize(in);
- uint32 rows = 0;
+ uint64 stripsize = TIFFStripSize(in);
+ uint64 rows = 0;
uint32 rps = TIFFGetFieldDefaulted(in, TIFFTAG_ROWSPERSTRIP, &rps);
tsize_t scanline_size = TIFFScanlineSize(in);
@@ -4341,10 +4357,10 @@ combineSeparateSamples32bits (uint8_t *in[], uint8_t *out, uint32_t cols,
"Row %3d, Col %3d, Src byte offset %3d bit offset %2d Dst offset %3d",
row + 1, col + 1, src_byte, src_bit, dst - out);
- dump_long (dumpfile, format, "Match bits ", matchbits);
+ dump_wide (dumpfile, format, "Match bits ", matchbits);
dump_data (dumpfile, format, "Src bits ", src, 4);
- dump_long (dumpfile, format, "Buff1 bits ", buff1);
- dump_long (dumpfile, format, "Buff2 bits ", buff2);
+ dump_wide (dumpfile, format, "Buff1 bits ", buff1);
+ dump_wide (dumpfile, format, "Buff2 bits ", buff2);
dump_byte (dumpfile, format, "Write bits1", bytebuff1);
dump_byte (dumpfile, format, "Write bits2", bytebuff2);
dump_info (dumpfile, format, "", "Ready bits: %2d", ready_bits);
@@ -4866,10 +4882,10 @@ combineSeparateTileSamples32bits (uint8_t *in[], uint8_t *out, uint32_t cols,
"Row %3d, Col %3d, Src byte offset %3d bit offset %2d Dst offset %3d",
row + 1, col + 1, src_byte, src_bit, dst - out);
- dump_long (dumpfile, format, "Match bits ", matchbits);
+ dump_wide (dumpfile, format, "Match bits ", matchbits);
dump_data (dumpfile, format, "Src bits ", src, 4);
- dump_long (dumpfile, format, "Buff1 bits ", buff1);
- dump_long (dumpfile, format, "Buff2 bits ", buff2);
+ dump_wide (dumpfile, format, "Buff1 bits ", buff1);
+ dump_wide (dumpfile, format, "Buff2 bits ", buff2);
dump_byte (dumpfile, format, "Write bits1", bytebuff1);
dump_byte (dumpfile, format, "Write bits2", bytebuff2);
dump_info (dumpfile, format, "", "Ready bits: %2d", ready_bits);
@@ -4892,7 +4908,7 @@ static int readSeparateStripsIntoBuffer (TIFF *in, uint8_t *obuf, uint32_t lengt
{
int i, bytes_per_sample, bytes_per_pixel, shift_width, result = 1;
uint32 j;
- int32 bytes_read = 0;
+ int64 bytes_read = 0;
uint16 bps = 0, planar;
uint32 nstrips;
uint32 strips_per_sample;
@@ -4958,7 +4974,7 @@ static int readSeparateStripsIntoBuffer (TIFF *in, uint8_t *obuf, uint32_t lengt
for (s = 0; (s < spp) && (s < MAX_SAMPLES); s++)
{
srcbuffs[s] = NULL;
- buff = limitMalloc(stripsize + 3);
+ buff = limitMalloc(stripsize + NUM_BUFF_OVERSIZE_BYTES);
if (!buff)
{
TIFFError ("readSeparateStripsIntoBuffer",
@@ -4981,7 +4997,7 @@ static int readSeparateStripsIntoBuffer (TIFF *in, uint8_t *obuf, uint32_t lengt
buff = srcbuffs[s];
strip = (s * strips_per_sample) + j;
bytes_read = TIFFReadEncodedStrip (in, strip, buff, stripsize);
- rows_this_strip = bytes_read / src_rowsize;
+ rows_this_strip = (uint32)(bytes_read / src_rowsize);
if (bytes_read < 0 && !ignore)
{
TIFFError(TIFFFileName(in),
@@ -6044,13 +6060,14 @@ loadImage(TIFF* in, struct image_data *image, struct dump_opts *dump, unsigned c
uint16 input_compression = 0, input_photometric = 0;
uint16 subsampling_horiz, subsampling_vert;
uint32 width = 0, length = 0;
- uint32 stsize = 0, tlsize = 0, buffsize = 0, scanlinesize = 0;
+ uint64 stsize = 0, tlsize = 0, buffsize = 0;
+ uint64 scanlinesize = 0;
uint32 tw = 0, tl = 0; /* Tile width and length */
- uint32 tile_rowsize = 0;
+ uint64 tile_rowsize = 0;
unsigned char *read_buff = NULL;
unsigned char *new_buff = NULL;
int readunit = 0;
- static uint32 prev_readsize = 0;
+ static uint64 prev_readsize = 0;
TIFFGetFieldDefaulted(in, TIFFTAG_BITSPERSAMPLE, &bps);
TIFFGetFieldDefaulted(in, TIFFTAG_SAMPLESPERPIXEL, &spp);
@@ -6358,7 +6377,7 @@ loadImage(TIFF* in, struct image_data *image, struct dump_opts *dump, unsigned c
TIFFError("loadImage", "Unable to allocate/reallocate read buffer");
return (-1);
}
- read_buff = (unsigned char *)limitMalloc(buffsize+3);
+ read_buff = (unsigned char *)limitMalloc(buffsize + NUM_BUFF_OVERSIZE_BYTES);
}
else
{
@@ -6369,11 +6388,11 @@ loadImage(TIFF* in, struct image_data *image, struct dump_opts *dump, unsigned c
TIFFError("loadImage", "Unable to allocate/reallocate read buffer");
return (-1);
}
- new_buff = _TIFFrealloc(read_buff, buffsize+3);
+ new_buff = _TIFFrealloc(read_buff, buffsize + NUM_BUFF_OVERSIZE_BYTES);
if (!new_buff)
{
free (read_buff);
- read_buff = (unsigned char *)limitMalloc(buffsize+3);
+ read_buff = (unsigned char *)limitMalloc(buffsize + NUM_BUFF_OVERSIZE_BYTES);
}
else
read_buff = new_buff;
@@ -6446,8 +6465,13 @@ loadImage(TIFF* in, struct image_data *image, struct dump_opts *dump, unsigned c
dump_info (dump->infile, dump->format, "",
"Bits per sample %d, Samples per pixel %d", bps, spp);
+ if (scanlinesize > 0x0ffffffffULL) {
+ dump_info(dump->infile, dump->format, "loadImage",
+ "Attention: scanlinesize %llu is larger than UINT32_MAX.\nFollowing dump might be wrong.",
+ scanlinesize);
+ }
for (i = 0; i < length; i++)
- dump_buffer(dump->infile, dump->format, 1, scanlinesize,
+ dump_buffer(dump->infile, dump->format, 1, (uint32)scanlinesize,
i, read_buff + (i * scanlinesize));
}
return (0);
@@ -7467,13 +7491,13 @@ writeSingleSection(TIFF *in, TIFF *out, struct image_data *image,
if (TIFFGetField(in, TIFFTAG_NUMBEROFINKS, &ninks)) {
TIFFSetField(out, TIFFTAG_NUMBEROFINKS, ninks);
if (TIFFGetField(in, TIFFTAG_INKNAMES, &inknames)) {
- int inknameslen = strlen(inknames) + 1;
+ int inknameslen = (int)strlen(inknames) + 1;
const char* cp = inknames;
while (ninks > 1) {
cp = strchr(cp, '\0');
if (cp) {
cp++;
- inknameslen += (strlen(cp) + 1);
+ inknameslen += ((int)strlen(cp) + 1);
}
ninks--;
}
@@ -7536,23 +7560,23 @@ createImageSection(uint32_t sectsize, unsigned char **sect_buff_ptr)
if (!sect_buff)
{
- sect_buff = (unsigned char *)limitMalloc(sectsize);
+ sect_buff = (unsigned char *)limitMalloc(sectsize + NUM_BUFF_OVERSIZE_BYTES);
if (!sect_buff)
{
TIFFError("createImageSection", "Unable to allocate/reallocate section buffer");
return (-1);
}
- _TIFFmemset(sect_buff, 0, sectsize);
+ _TIFFmemset(sect_buff, 0, sectsize + NUM_BUFF_OVERSIZE_BYTES);
}
else
{
if (prev_sectsize < sectsize)
{
- new_buff = _TIFFrealloc(sect_buff, sectsize);
+ new_buff = _TIFFrealloc(sect_buff, sectsize + NUM_BUFF_OVERSIZE_BYTES);
if (!new_buff)
{
_TIFFfree (sect_buff);
- sect_buff = (unsigned char *)limitMalloc(sectsize);
+ sect_buff = (unsigned char *)limitMalloc(sectsize + NUM_BUFF_OVERSIZE_BYTES);
}
else
sect_buff = new_buff;
@@ -7562,7 +7586,7 @@ createImageSection(uint32_t sectsize, unsigned char **sect_buff_ptr)
TIFFError("createImageSection", "Unable to allocate/reallocate section buffer");
return (-1);
}
- _TIFFmemset(sect_buff, 0, sectsize);
+ _TIFFmemset(sect_buff, 0, sectsize + NUM_BUFF_OVERSIZE_BYTES);
}
}
@@ -7593,17 +7617,17 @@ processCropSelections(struct image_data *image, struct crop_mask *crop,
cropsize = crop->bufftotal;
crop_buff = seg_buffs[0].buffer;
if (!crop_buff)
- crop_buff = (unsigned char *)limitMalloc(cropsize);
+ crop_buff = (unsigned char *)limitMalloc(cropsize + NUM_BUFF_OVERSIZE_BYTES);
else
{
prev_cropsize = seg_buffs[0].size;
if (prev_cropsize < cropsize)
{
- next_buff = _TIFFrealloc(crop_buff, cropsize);
+ next_buff = _TIFFrealloc(crop_buff, cropsize + NUM_BUFF_OVERSIZE_BYTES);
if (! next_buff)
{
_TIFFfree (crop_buff);
- crop_buff = (unsigned char *)limitMalloc(cropsize);
+ crop_buff = (unsigned char *)limitMalloc(cropsize + NUM_BUFF_OVERSIZE_BYTES);
}
else
crop_buff = next_buff;
@@ -7616,7 +7640,7 @@ processCropSelections(struct image_data *image, struct crop_mask *crop,
return (-1);
}
- _TIFFmemset(crop_buff, 0, cropsize);
+ _TIFFmemset(crop_buff, 0, cropsize + NUM_BUFF_OVERSIZE_BYTES);
seg_buffs[0].buffer = crop_buff;
seg_buffs[0].size = cropsize;
@@ -7696,17 +7720,17 @@ processCropSelections(struct image_data *image, struct crop_mask *crop,
cropsize = crop->bufftotal;
crop_buff = seg_buffs[i].buffer;
if (!crop_buff)
- crop_buff = (unsigned char *)limitMalloc(cropsize);
+ crop_buff = (unsigned char *)limitMalloc(cropsize + NUM_BUFF_OVERSIZE_BYTES);
else
{
prev_cropsize = seg_buffs[0].size;
if (prev_cropsize < cropsize)
{
- next_buff = _TIFFrealloc(crop_buff, cropsize);
+ next_buff = _TIFFrealloc(crop_buff, cropsize + NUM_BUFF_OVERSIZE_BYTES);
if (! next_buff)
{
_TIFFfree (crop_buff);
- crop_buff = (unsigned char *)limitMalloc(cropsize);
+ crop_buff = (unsigned char *)limitMalloc(cropsize + NUM_BUFF_OVERSIZE_BYTES);
}
else
crop_buff = next_buff;
@@ -7719,7 +7743,7 @@ processCropSelections(struct image_data *image, struct crop_mask *crop,
return (-1);
}
- _TIFFmemset(crop_buff, 0, cropsize);
+ _TIFFmemset(crop_buff, 0, cropsize + NUM_BUFF_OVERSIZE_BYTES);
seg_buffs[i].buffer = crop_buff;
seg_buffs[i].size = cropsize;
@@ -7835,24 +7859,24 @@ createCroppedImage(struct image_data *image, struct crop_mask *crop,
crop_buff = *crop_buff_ptr;
if (!crop_buff)
{
- crop_buff = (unsigned char *)limitMalloc(cropsize);
+ crop_buff = (unsigned char *)limitMalloc(cropsize + NUM_BUFF_OVERSIZE_BYTES);
if (!crop_buff)
{
TIFFError("createCroppedImage", "Unable to allocate/reallocate crop buffer");
return (-1);
}
- _TIFFmemset(crop_buff, 0, cropsize);
+ _TIFFmemset(crop_buff, 0, cropsize + NUM_BUFF_OVERSIZE_BYTES);
prev_cropsize = cropsize;
}
else
{
if (prev_cropsize < cropsize)
{
- new_buff = _TIFFrealloc(crop_buff, cropsize);
+ new_buff = _TIFFrealloc(crop_buff, cropsize + NUM_BUFF_OVERSIZE_BYTES);
if (!new_buff)
{
free (crop_buff);
- crop_buff = (unsigned char *)limitMalloc(cropsize);
+ crop_buff = (unsigned char *)limitMalloc(cropsize + NUM_BUFF_OVERSIZE_BYTES);
}
else
crop_buff = new_buff;
@@ -7861,7 +7885,7 @@ createCroppedImage(struct image_data *image, struct crop_mask *crop,
TIFFError("createCroppedImage", "Unable to allocate/reallocate crop buffer");
return (-1);
}
- _TIFFmemset(crop_buff, 0, cropsize);
+ _TIFFmemset(crop_buff, 0, cropsize + NUM_BUFF_OVERSIZE_BYTES);
}
}
@@ -8159,13 +8183,13 @@ writeCroppedImage(TIFF *in, TIFF *out, struct image_data *image,
if (TIFFGetField(in, TIFFTAG_NUMBEROFINKS, &ninks)) {
TIFFSetField(out, TIFFTAG_NUMBEROFINKS, ninks);
if (TIFFGetField(in, TIFFTAG_INKNAMES, &inknames)) {
- int inknameslen = strlen(inknames) + 1;
+ int inknameslen = (int)strlen(inknames) + 1;
const char* cp = inknames;
while (ninks > 1) {
cp = strchr(cp, '\0');
if (cp) {
cp++;
- inknameslen += (strlen(cp) + 1);
+ inknameslen += ((int)strlen(cp) + 1);
}
ninks--;
}
@@ -8625,12 +8649,13 @@ rotateImage(uint16_t rotation, struct image_data *image, uint32_t *img_width,
return (-1);
}
- if (!(rbuff = (unsigned char *)limitMalloc(buffsize)))
+ /* Add 3 padding bytes for extractContigSamplesShifted32bits */
+ if (!(rbuff = (unsigned char *)limitMalloc(buffsize + NUM_BUFF_OVERSIZE_BYTES)))
{
- TIFFError("rotateImage", "Unable to allocate rotation buffer of %1u bytes", buffsize);
+ TIFFError("rotateImage", "Unable to allocate rotation buffer of %1u bytes", buffsize + NUM_BUFF_OVERSIZE_BYTES);
return (-1);
}
- _TIFFmemset(rbuff, '\0', buffsize);
+ _TIFFmemset(rbuff, '\0', buffsize + NUM_BUFF_OVERSIZE_BYTES);
ibuff = *ibuff_ptr;
switch (rotation)
@@ -9255,12 +9280,13 @@ mirrorImage(uint16_t spp, uint16_t bps, uint16_t mirror, uint32_t width, uint32_
{
case MIRROR_BOTH:
case MIRROR_VERT:
- line_buff = (unsigned char *)limitMalloc(rowsize);
+ line_buff = (unsigned char *)limitMalloc(rowsize + NUM_BUFF_OVERSIZE_BYTES);
if (line_buff == NULL)
{
- TIFFError ("mirrorImage", "Unable to allocate mirror line buffer of %1u bytes", rowsize);
+ TIFFError ("mirrorImage", "Unable to allocate mirror line buffer of %1u bytes", rowsize + NUM_BUFF_OVERSIZE_BYTES);
return (-1);
}
+ _TIFFmemset(line_buff, '\0', rowsize + NUM_BUFF_OVERSIZE_BYTES);
dst = ibuff + (rowsize * (length - 1));
for (row = 0; row < length / 2; row++)
@@ -9292,11 +9318,12 @@ mirrorImage(uint16_t spp, uint16_t bps, uint16_t mirror, uint32_t width, uint32_
}
else
{ /* non 8 bit per sample data */
- if (!(line_buff = (unsigned char *)limitMalloc(rowsize + 1)))
+ if (!(line_buff = (unsigned char *)limitMalloc(rowsize + NUM_BUFF_OVERSIZE_BYTES)))
{
TIFFError("mirrorImage", "Unable to allocate mirror line buffer");
return (-1);
}
+ _TIFFmemset(line_buff, '\0', rowsize + NUM_BUFF_OVERSIZE_BYTES);
bytes_per_sample = (bps + 7) / 8;
bytes_per_pixel = ((bps * spp) + 7) / 8;
if (bytes_per_pixel < (bytes_per_sample + 1))
@@ -9308,7 +9335,7 @@ mirrorImage(uint16_t spp, uint16_t bps, uint16_t mirror, uint32_t width, uint32_
{
row_offset = row * rowsize;
src = ibuff + row_offset;
- _TIFFmemset (line_buff, '\0', rowsize);
+ _TIFFmemset (line_buff, '\0', rowsize + NUM_BUFF_OVERSIZE_BYTES);
switch (shift_width)
{
case 1: if (reverseSamples16bits(spp, bps, width, src, line_buff))
--
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