From 1e000b3484808f1ee7a68bd276220d1cd82dec73 Mon Sep 17 00:00:00 2001 From: Su Laus Date: Thu, 13 Oct 2022 14:33:27 +0000 Subject: [PATCH] tiffcrop subroutines require a larger buffer (fixes #271, #381, #386, #388, #389, #435) CVE: CVE-2022-3570 CVE-2022-3598 Upstream-Status: Backport Signed-off-by: Ross Burton --- tools/tiffcrop.c | 203 ++++++++++++++++++++++++++--------------------- 1 file changed, 114 insertions(+), 89 deletions(-) diff --git a/tools/tiffcrop.c b/tools/tiffcrop.c index f96c7d60..adf0f849 100644 --- a/tools/tiffcrop.c +++ b/tools/tiffcrop.c @@ -210,6 +210,10 @@ static char tiffcrop_rev_date[] = "02-09-2022"; #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_t tmargin; @@ -231,7 +235,7 @@ struct offset { */ struct buffinfo { - uint32_t size; /* size of this buffer */ + size_t 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_t dst_rowsize, shift_width; uint32_t bytes_per_sample, bytes_per_pixel; uint32_t trailing_bits, prev_trailing_bits; - uint32_t tile_rowsize = TIFFTileRowSize(in); - uint32_t src_offset, dst_offset; + tmsize_t tile_rowsize = TIFFTileRowSize(in); + tmsize_t src_offset, dst_offset; uint32_t row_offset, col_offset; uint8_t *bufp = (uint8_t*) 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", @@ -1213,7 +1217,8 @@ 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; @@ -1226,7 +1231,7 @@ 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); @@ -1234,10 +1239,15 @@ 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 %"PRIu64" 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_t)scanlinesize, src - buf); + dump_buffer(dump->outfile, dump->format, nrows, (uint32_t)scanlinesize, row, obuf); } if (TIFFWriteEncodedStrip(out, strip++, obuf, stripsize) < 0) @@ -1264,7 +1274,7 @@ static int writeBufferToContigTiles (TIFF* out, uint8_t* buf, uint32_t imageleng uint32_t tl, tw; uint32_t row, col, nrow, ncol; uint32_t src_rowsize, col_offset; - uint32_t tile_rowsize = TIFFTileRowSize(out); + tmsize_t tile_rowsize = TIFFTileRowSize(out); uint8_t* bufp = (uint8_t*) buf; tsize_t tile_buffsize = 0; tsize_t tilesize = TIFFTileSize(out); @@ -1307,9 +1317,11 @@ 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; @@ -1355,7 +1367,8 @@ static int writeBufferToSeparateTiles (TIFF* out, uint8_t* buf, uint32_t imagele uint32_t 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_t tl, tw; uint32_t row, col, nrow, ncol; uint32_t src_rowsize, col_offset; @@ -1365,6 +1378,7 @@ 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) || @@ -1790,14 +1804,14 @@ 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 */ @@ -2270,6 +2284,8 @@ 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); @@ -3222,13 +3238,13 @@ extractContigSamples32bits (uint8_t *in, uint8_t *out, uint32_t cols, /* If we have a full buffer's worth, write it out */ if (ready_bits >= 32) { - bytebuff1 = (buff2 >> 56); + bytebuff1 = (uint8_t)(buff2 >> 56); *dst++ = bytebuff1; - bytebuff2 = (buff2 >> 48); + bytebuff2 = (uint8_t)(buff2 >> 48); *dst++ = bytebuff2; - bytebuff3 = (buff2 >> 40); + bytebuff3 = (uint8_t)(buff2 >> 40); *dst++ = bytebuff3; - bytebuff4 = (buff2 >> 32); + bytebuff4 = (uint8_t)(buff2 >> 32); *dst++ = bytebuff4; ready_bits -= 32; @@ -3637,13 +3653,13 @@ extractContigSamplesShifted32bits (uint8_t *in, uint8_t *out, uint32_t cols, } else /* If we have a full buffer's worth, write it out */ { - bytebuff1 = (buff2 >> 56); + bytebuff1 = (uint8_t)(buff2 >> 56); *dst++ = bytebuff1; - bytebuff2 = (buff2 >> 48); + bytebuff2 = (uint8_t)(buff2 >> 48); *dst++ = bytebuff2; - bytebuff3 = (buff2 >> 40); + bytebuff3 = (uint8_t)(buff2 >> 40); *dst++ = bytebuff3; - bytebuff4 = (buff2 >> 32); + bytebuff4 = (uint8_t)(buff2 >> 32); *dst++ = bytebuff4; ready_bits -= 32; @@ -3820,10 +3836,10 @@ extractContigSamplesToTileBuffer(uint8_t *out, uint8_t *in, uint32_t rows, uint3 static int readContigStripsIntoBuffer (TIFF* in, uint8_t* buf) { uint8_t* bufp = buf; - int32_t bytes_read = 0; + tmsize_t bytes_read = 0; uint32_t strip, nstrips = TIFFNumberOfStrips(in); - uint32_t stripsize = TIFFStripSize(in); - uint32_t rows = 0; + tmsize_t stripsize = TIFFStripSize(in); + tmsize_t rows = 0; uint32_t rps = TIFFGetFieldDefaulted(in, TIFFTAG_ROWSPERSTRIP, &rps); tsize_t scanline_size = TIFFScanlineSize(in); @@ -3836,11 +3852,11 @@ static int readContigStripsIntoBuffer (TIFF* in, uint8_t* buf) bytes_read = TIFFReadEncodedStrip (in, strip, bufp, -1); rows = bytes_read / scanline_size; if ((strip < (nstrips - 1)) && (bytes_read != (int32_t)stripsize)) - TIFFError("", "Strip %"PRIu32": read %"PRId32" bytes, strip size %"PRIu32, + TIFFError("", "Strip %"PRIu32": read %"PRId64" bytes, strip size %"PRIu64, strip + 1, bytes_read, stripsize); if (bytes_read < 0 && !ignore) { - TIFFError("", "Error reading strip %"PRIu32" after %"PRIu32" rows", + TIFFError("", "Error reading strip %"PRIu32" after %"PRIu64" rows", strip, rows); return 0; } @@ -4305,13 +4321,13 @@ combineSeparateSamples32bits (uint8_t *in[], uint8_t *out, uint32_t cols, /* If we have a full buffer's worth, write it out */ if (ready_bits >= 32) { - bytebuff1 = (buff2 >> 56); + bytebuff1 = (uint8_t)(buff2 >> 56); *dst++ = bytebuff1; - bytebuff2 = (buff2 >> 48); + bytebuff2 = (uint8_t)(buff2 >> 48); *dst++ = bytebuff2; - bytebuff3 = (buff2 >> 40); + bytebuff3 = (uint8_t)(buff2 >> 40); *dst++ = bytebuff3; - bytebuff4 = (buff2 >> 32); + bytebuff4 = (uint8_t)(buff2 >> 32); *dst++ = bytebuff4; ready_bits -= 32; @@ -4354,10 +4370,10 @@ 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); @@ -4830,13 +4846,13 @@ combineSeparateTileSamples32bits (uint8_t *in[], uint8_t *out, uint32_t cols, /* If we have a full buffer's worth, write it out */ if (ready_bits >= 32) { - bytebuff1 = (buff2 >> 56); + bytebuff1 = (uint8_t)(buff2 >> 56); *dst++ = bytebuff1; - bytebuff2 = (buff2 >> 48); + bytebuff2 = (uint8_t)(buff2 >> 48); *dst++ = bytebuff2; - bytebuff3 = (buff2 >> 40); + bytebuff3 = (uint8_t)(buff2 >> 40); *dst++ = bytebuff3; - bytebuff4 = (buff2 >> 32); + bytebuff4 = (uint8_t)(buff2 >> 32); *dst++ = bytebuff4; ready_bits -= 32; @@ -4879,10 +4895,10 @@ 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); @@ -4905,7 +4921,7 @@ static int readSeparateStripsIntoBuffer (TIFF *in, uint8_t *obuf, uint32_t lengt { int i, bytes_per_sample, bytes_per_pixel, shift_width, result = 1; uint32_t j; - int32_t bytes_read = 0; + tmsize_t bytes_read = 0; uint16_t bps = 0, planar; uint32_t nstrips; uint32_t strips_per_sample; @@ -4971,7 +4987,7 @@ 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", @@ -4994,7 +5010,7 @@ 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_t)(bytes_read / src_rowsize); if (bytes_read < 0 && !ignore) { TIFFError(TIFFFileName(in), @@ -6047,13 +6063,14 @@ loadImage(TIFF* in, struct image_data *image, struct dump_opts *dump, unsigned c uint16_t input_compression = 0, input_photometric = 0; uint16_t subsampling_horiz, subsampling_vert; uint32_t width = 0, length = 0; - uint32_t stsize = 0, tlsize = 0, buffsize = 0, scanlinesize = 0; + tmsize_t stsize = 0, tlsize = 0, buffsize = 0; + tmsize_t scanlinesize = 0; uint32_t tw = 0, tl = 0; /* Tile width and length */ - uint32_t tile_rowsize = 0; + tmsize_t tile_rowsize = 0; unsigned char *read_buff = NULL; unsigned char *new_buff = NULL; int readunit = 0; - static uint32_t prev_readsize = 0; + static tmsize_t prev_readsize = 0; TIFFGetFieldDefaulted(in, TIFFTAG_BITSPERSAMPLE, &bps); TIFFGetFieldDefaulted(in, TIFFTAG_SAMPLESPERPIXEL, &spp); @@ -6355,7 +6372,7 @@ 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 { @@ -6366,11 +6383,11 @@ 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; @@ -6443,8 +6460,13 @@ loadImage(TIFF* in, struct image_data *image, struct dump_opts *dump, unsigned c dump_info (dump->infile, dump->format, "", "Bits per sample %"PRIu16", Samples per pixel %"PRIu16, bps, spp); + if (scanlinesize > 0x0ffffffffULL) { + dump_info(dump->infile, dump->format, "loadImage", + "Attention: scanlinesize %"PRIu64" 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_t)scanlinesize, i, read_buff + (i * scanlinesize)); } return (0); @@ -7464,13 +7486,13 @@ 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--; } @@ -7533,23 +7555,23 @@ 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; @@ -7559,7 +7581,7 @@ 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); } } @@ -7590,17 +7612,17 @@ 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; @@ -7613,7 +7635,7 @@ 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; @@ -7693,17 +7715,17 @@ 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; @@ -7716,7 +7738,7 @@ 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; @@ -7832,24 +7854,24 @@ 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; @@ -7858,7 +7880,7 @@ 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); } } @@ -8156,13 +8178,13 @@ 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--; } @@ -8547,13 +8569,13 @@ rotateContigSamples32bits(uint16_t rotation, uint16_t spp, uint16_t bps, uint32_ } else /* If we have a full buffer's worth, write it out */ { - bytebuff1 = (buff2 >> 56); + bytebuff1 = (uint8_t)(buff2 >> 56); *dst++ = bytebuff1; - bytebuff2 = (buff2 >> 48); + bytebuff2 = (uint8_t)(buff2 >> 48); *dst++ = bytebuff2; - bytebuff3 = (buff2 >> 40); + bytebuff3 = (uint8_t)(buff2 >> 40); *dst++ = bytebuff3; - bytebuff4 = (buff2 >> 32); + bytebuff4 = (uint8_t)(buff2 >> 32); *dst++ = bytebuff4; ready_bits -= 32; @@ -8622,12 +8644,13 @@ 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) @@ -9155,13 +9178,13 @@ reverseSamples32bits (uint16_t spp, uint16_t bps, uint32_t width, } else /* If we have a full buffer's worth, write it out */ { - bytebuff1 = (buff2 >> 56); + bytebuff1 = (uint8_t)(buff2 >> 56); *dst++ = bytebuff1; - bytebuff2 = (buff2 >> 48); + bytebuff2 = (uint8_t)(buff2 >> 48); *dst++ = bytebuff2; - bytebuff3 = (buff2 >> 40); + bytebuff3 = (uint8_t)(buff2 >> 40); *dst++ = bytebuff3; - bytebuff4 = (buff2 >> 32); + bytebuff4 = (uint8_t)(buff2 >> 32); *dst++ = bytebuff4; ready_bits -= 32; @@ -9252,12 +9275,13 @@ 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++) @@ -9289,11 +9313,12 @@ 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)) @@ -9305,7 +9330,7 @@ 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))