From 1c5e98c6fdd664eda5e6d04835e55125a2117970 Mon Sep 17 00:00:00 2001 From: Nicolas Pena Date: Thu, 30 Mar 2017 14:32:05 -0400 Subject: Libtiff security upstream patches MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit CL list: https://github.com/vadz/libtiff/commit/438274f938e046d33cb0e1230b41da32ffe223e1 https://github.com/vadz/libtiff/commit/43bc256d8ae44b92d2734a3c5bc73957a4d7c1ec https://github.com/vadz/libtiff/commit/1044b43637fa7f70fb19b93593777b78bd20da86 https://github.com/vadz/libtiff/commit/9a72a69e035ee70ff5c41541c8c61cd97990d018 https://github.com/vadz/libtiff/commit/b4b41925115059b49f97432bda0613411df2f686 Bug: chromium:706349 Change-Id: I782156e7486919a62e25eeb95cb8699f1b2c5ee1 Reviewed-on: https://pdfium-review.googlesource.com/3374 Reviewed-by: dsinclair Reviewed-by: Lei Zhang Commit-Queue: Nicolás Peña --- .../libtiff/0020-upstream-security-fixes.patch | 270 +++++++++++++++++++++ third_party/libtiff/README.pdfium | 1 + third_party/libtiff/tif_dir.c | 26 ++ third_party/libtiff/tif_dirread.c | 22 +- third_party/libtiff/tif_luv.c | 18 +- third_party/libtiff/tif_ojpeg.c | 8 + third_party/libtiff/tif_pixarlog.c | 17 +- third_party/libtiff/tif_read.c | 2 +- third_party/libtiff/tif_strip.c | 9 - third_party/libtiff/tiffiop.h | 4 + 10 files changed, 349 insertions(+), 28 deletions(-) create mode 100644 third_party/libtiff/0020-upstream-security-fixes.patch (limited to 'third_party/libtiff') diff --git a/third_party/libtiff/0020-upstream-security-fixes.patch b/third_party/libtiff/0020-upstream-security-fixes.patch new file mode 100644 index 0000000000..139b79ddeb --- /dev/null +++ b/third_party/libtiff/0020-upstream-security-fixes.patch @@ -0,0 +1,270 @@ +diff --git a/third_party/libtiff/tif_dir.c b/third_party/libtiff/tif_dir.c +index 4b3632ab1..81b849374 100644 +--- a/third_party/libtiff/tif_dir.c ++++ b/third_party/libtiff/tif_dir.c +@@ -862,6 +862,32 @@ _TIFFVGetField(TIFF* tif, uint32 tag, va_list ap) + if( fip == NULL ) /* cannot happen since TIFFGetField() already checks it */ + return 0; + ++ if( tag == TIFFTAG_NUMBEROFINKS ) ++ { ++ int i; ++ for (i = 0; i < td->td_customValueCount; i++) { ++ uint16 val; ++ TIFFTagValue *tv = td->td_customValues + i; ++ if (tv->info->field_tag != tag) ++ continue; ++ val = *(uint16 *)tv->value; ++ /* Truncate to SamplesPerPixel, since the */ ++ /* setting code for INKNAMES assume that there are SamplesPerPixel */ ++ /* inknames. */ ++ /* Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2599 */ ++ if( val > td->td_samplesperpixel ) ++ { ++ TIFFWarningExt(tif->tif_clientdata,"_TIFFVGetField", ++ "Truncating NumberOfInks from %u to %u", ++ val, td->td_samplesperpixel); ++ val = td->td_samplesperpixel; ++ } ++ *va_arg(ap, uint16*) = val; ++ return 1; ++ } ++ return 0; ++ } ++ + /* + * We want to force the custom code to be used for custom + * fields even if the tag happens to match a well known +diff --git a/third_party/libtiff/tif_dirread.c b/third_party/libtiff/tif_dirread.c +index d50b39a80..7dbcf6d86 100644 +--- a/third_party/libtiff/tif_dirread.c ++++ b/third_party/libtiff/tif_dirread.c +@@ -5503,8 +5503,7 @@ ChopUpSingleUncompressedStrip(TIFF* tif) + uint64 rowblockbytes; + uint64 stripbytes; + uint32 strip; +- uint64 nstrips64; +- uint32 nstrips32; ++ uint32 nstrips; + uint32 rowsperstrip; + uint64* newcounts; + uint64* newoffsets; +@@ -5535,18 +5534,17 @@ ChopUpSingleUncompressedStrip(TIFF* tif) + return; + + /* +- * never increase the number of strips in an image ++ * never increase the number of rows per strip + */ + if (rowsperstrip >= td->td_rowsperstrip) + return; +- nstrips64 = TIFFhowmany_64(bytecount, stripbytes); +- if ((nstrips64==0)||(nstrips64>0xFFFFFFFF)) /* something is wonky, do nothing. */ +- return; +- nstrips32 = (uint32)nstrips64; ++ nstrips = TIFFhowmany_32(td->td_imagelength, rowsperstrip); ++ if( nstrips == 0 ) ++ return; + +- newcounts = (uint64*) _TIFFCheckMalloc(tif, nstrips32, sizeof (uint64), ++ newcounts = (uint64*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint64), + "for chopped \"StripByteCounts\" array"); +- newoffsets = (uint64*) _TIFFCheckMalloc(tif, nstrips32, sizeof (uint64), ++ newoffsets = (uint64*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint64), + "for chopped \"StripOffsets\" array"); + if (newcounts == NULL || newoffsets == NULL) { + /* +@@ -5563,18 +5561,18 @@ ChopUpSingleUncompressedStrip(TIFF* tif) + * Fill the strip information arrays with new bytecounts and offsets + * that reflect the broken-up format. + */ +- for (strip = 0; strip < nstrips32; strip++) { ++ for (strip = 0; strip < nstrips; strip++) { + if (stripbytes > bytecount) + stripbytes = bytecount; + newcounts[strip] = stripbytes; +- newoffsets[strip] = offset; ++ newoffsets[strip] = stripbytes ? offset : 0; + offset += stripbytes; + bytecount -= stripbytes; + } + /* + * Replace old single strip info with multi-strip info. + */ +- td->td_stripsperimage = td->td_nstrips = nstrips32; ++ td->td_stripsperimage = td->td_nstrips = nstrips; + TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, rowsperstrip); + + _TIFFfree(td->td_stripbytecount); +diff --git a/third_party/libtiff/tif_luv.c b/third_party/libtiff/tif_luv.c +index ca08f30a7..220c15034 100644 +--- a/third_party/libtiff/tif_luv.c ++++ b/third_party/libtiff/tif_luv.c +@@ -158,6 +158,7 @@ + typedef struct logLuvState LogLuvState; + + struct logLuvState { ++ int encoder_state; /* 1 if encoder correctly initialized */ + int user_datafmt; /* user data format */ + int encode_meth; /* encoding method */ + int pixel_size; /* bytes per pixel */ +@@ -1552,6 +1553,7 @@ LogLuvSetupEncode(TIFF* tif) + td->td_photometric, "must be either LogLUV or LogL"); + break; + } ++ sp->encoder_state = 1; + return (1); + notsupported: + TIFFErrorExt(tif->tif_clientdata, module, +@@ -1563,19 +1565,27 @@ notsupported: + static void + LogLuvClose(TIFF* tif) + { ++ LogLuvState* sp = (LogLuvState*) tif->tif_data; + TIFFDirectory *td = &tif->tif_dir; + ++ assert(sp != 0); + /* + * For consistency, we always want to write out the same + * bitspersample and sampleformat for our TIFF file, + * regardless of the data format being used by the application. + * Since this routine is called after tags have been set but + * before they have been recorded in the file, we reset them here. ++ * Note: this is really a nasty approach. See PixarLogClose + */ +- td->td_samplesperpixel = +- (td->td_photometric == PHOTOMETRIC_LOGL) ? 1 : 3; +- td->td_bitspersample = 16; +- td->td_sampleformat = SAMPLEFORMAT_INT; ++ if( sp->encoder_state ) ++ { ++ /* See PixarLogClose. Might avoid issues with tags whose size depends ++ * on those below, but not completely sure this is enough. */ ++ td->td_samplesperpixel = ++ (td->td_photometric == PHOTOMETRIC_LOGL) ? 1 : 3; ++ td->td_bitspersample = 16; ++ td->td_sampleformat = SAMPLEFORMAT_INT; ++ } + } + + static void +diff --git a/third_party/libtiff/tif_ojpeg.c b/third_party/libtiff/tif_ojpeg.c +index e128887bf..cb84be96b 100644 +--- a/third_party/libtiff/tif_ojpeg.c ++++ b/third_party/libtiff/tif_ojpeg.c +@@ -253,6 +253,7 @@ typedef enum { + + typedef struct { + TIFF* tif; ++ int decoder_ok; + #ifndef LIBJPEG_ENCAP_EXTERNAL + JMP_BUF exit_jmpbuf; + #endif +@@ -731,6 +732,7 @@ OJPEGPreDecode(TIFF* tif, uint16 s) + } + sp->write_curstrile++; + } ++ sp->decoder_ok = 1; + return(1); + } + +@@ -793,8 +795,14 @@ OJPEGPreDecodeSkipScanlines(TIFF* tif) + static int + OJPEGDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s) + { ++ static const char module[]="OJPEGDecode"; + OJPEGState* sp=(OJPEGState*)tif->tif_data; + (void)s; ++ if( !sp->decoder_ok ) ++ { ++ TIFFErrorExt(tif->tif_clientdata,module,"Cannot decode: decoder not correctly initialized"); ++ return 0; ++ } + if (sp->libjpeg_jpeg_query_style==0) + { + if (OJPEGDecodeRaw(tif,buf,cc)==0) +diff --git a/third_party/libtiff/tif_pixarlog.c b/third_party/libtiff/tif_pixarlog.c +index 8f6ca8f63..e6574ec3d 100644 +--- a/third_party/libtiff/tif_pixarlog.c ++++ b/third_party/libtiff/tif_pixarlog.c +@@ -1233,8 +1233,10 @@ PixarLogPostEncode(TIFF* tif) + static void + PixarLogClose(TIFF* tif) + { ++ PixarLogState* sp = (PixarLogState*) tif->tif_data; + TIFFDirectory *td = &tif->tif_dir; + ++ assert(sp != 0); + /* In a really sneaky (and really incorrect, and untruthful, and + * troublesome, and error-prone) maneuver that completely goes against + * the spirit of TIFF, and breaks TIFF, on close, we covertly +@@ -1243,8 +1245,19 @@ PixarLogClose(TIFF* tif) + * readers that don't know about PixarLog, or how to set + * the PIXARLOGDATFMT pseudo-tag. + */ +- td->td_bitspersample = 8; +- td->td_sampleformat = SAMPLEFORMAT_UINT; ++ ++ if (sp->state&PLSTATE_INIT) { ++ /* We test the state to avoid an issue such as in ++ * http://bugzilla.maptools.org/show_bug.cgi?id=2604 ++ * What appends in that case is that the bitspersample is 1 and ++ * a TransferFunction is set. The size of the TransferFunction ++ * depends on 1<td_bitspersample = 8; ++ td->td_sampleformat = SAMPLEFORMAT_UINT; ++ } + } + + static void +diff --git a/third_party/libtiff/tif_read.c b/third_party/libtiff/tif_read.c +index 795153bbf..1ba100e54 100644 +--- a/third_party/libtiff/tif_read.c ++++ b/third_party/libtiff/tif_read.c +@@ -346,7 +346,7 @@ TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size) + rowsperstrip=td->td_rowsperstrip; + if (rowsperstrip>td->td_imagelength) + rowsperstrip=td->td_imagelength; +- stripsperplane=((td->td_imagelength+rowsperstrip-1)/rowsperstrip); ++ stripsperplane= TIFFhowmany_32_maxuint_compat(td->td_imagelength, rowsperstrip); + stripinplane=(strip%stripsperplane); + plane=(uint16)(strip/stripsperplane); + rows=td->td_imagelength-stripinplane*rowsperstrip; +diff --git a/third_party/libtiff/tif_strip.c b/third_party/libtiff/tif_strip.c +index b6098dd31..3b55285cd 100644 +--- a/third_party/libtiff/tif_strip.c ++++ b/third_party/libtiff/tif_strip.c +@@ -63,15 +63,6 @@ TIFFNumberOfStrips(TIFF* tif) + TIFFDirectory *td = &tif->tif_dir; + uint32 nstrips; + +- /* If the value was already computed and store in td_nstrips, then return it, +- since ChopUpSingleUncompressedStrip might have altered and resized the +- since the td_stripbytecount and td_stripoffset arrays to the new value +- after the initial affectation of td_nstrips = TIFFNumberOfStrips() in +- tif_dirread.c ~line 3612. +- See http://bugzilla.maptools.org/show_bug.cgi?id=2587 */ +- if( td->td_nstrips ) +- return td->td_nstrips; +- + nstrips = (td->td_rowsperstrip == (uint32) -1 ? 1 : + TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip)); + if (td->td_planarconfig == PLANARCONFIG_SEPARATE) +diff --git a/third_party/libtiff/tiffiop.h b/third_party/libtiff/tiffiop.h +index b6db1e932..1925a6b5e 100644 +--- a/third_party/libtiff/tiffiop.h ++++ b/third_party/libtiff/tiffiop.h +@@ -249,6 +249,10 @@ struct tiff { + #define TIFFhowmany_32(x, y) (((uint32)x < (0xffffffff - (uint32)(y-1))) ? \ + ((((uint32)(x))+(((uint32)(y))-1))/((uint32)(y))) : \ + 0U) ++/* Variant of TIFFhowmany_32() that doesn't return 0 if x close to MAXUINT. */ ++/* Caution: TIFFhowmany_32_maxuint_compat(x,y)*y might overflow */ ++#define TIFFhowmany_32_maxuint_compat(x, y) \ ++ (((uint32)(x) / (uint32)(y)) + ((((uint32)(x) % (uint32)(y)) != 0) ? 1 : 0)) + #define TIFFhowmany8_32(x) (((x)&0x07)?((uint32)(x)>>3)+1:(uint32)(x)>>3) + #define TIFFroundup_32(x, y) (TIFFhowmany_32(x,y)*(y)) + #define TIFFhowmany_64(x, y) ((((uint64)(x))+(((uint64)(y))-1))/((uint64)(y))) diff --git a/third_party/libtiff/README.pdfium b/third_party/libtiff/README.pdfium index b82bb7947a..55a314630a 100644 --- a/third_party/libtiff/README.pdfium +++ b/third_party/libtiff/README.pdfium @@ -24,3 +24,4 @@ Local Modifications: 0017-safe_skews_in_gtTileContig.patch: return error if to/from skews overflow from int32. 0018-fix-leak-in-PredictorSetupDecode.patch: call tif->tif_cleanup if the setup fails. 0019-oom-TIFFReadDirEntryArray.patch: Try to avoid out-of-memory in tif_dirread.c. +0020-upstream-security-fixes.patch: patch our copy with several upstream security fixes. diff --git a/third_party/libtiff/tif_dir.c b/third_party/libtiff/tif_dir.c index 4b3632ab1e..81b849374b 100644 --- a/third_party/libtiff/tif_dir.c +++ b/third_party/libtiff/tif_dir.c @@ -862,6 +862,32 @@ _TIFFVGetField(TIFF* tif, uint32 tag, va_list ap) if( fip == NULL ) /* cannot happen since TIFFGetField() already checks it */ return 0; + if( tag == TIFFTAG_NUMBEROFINKS ) + { + int i; + for (i = 0; i < td->td_customValueCount; i++) { + uint16 val; + TIFFTagValue *tv = td->td_customValues + i; + if (tv->info->field_tag != tag) + continue; + val = *(uint16 *)tv->value; + /* Truncate to SamplesPerPixel, since the */ + /* setting code for INKNAMES assume that there are SamplesPerPixel */ + /* inknames. */ + /* Fixes http://bugzilla.maptools.org/show_bug.cgi?id=2599 */ + if( val > td->td_samplesperpixel ) + { + TIFFWarningExt(tif->tif_clientdata,"_TIFFVGetField", + "Truncating NumberOfInks from %u to %u", + val, td->td_samplesperpixel); + val = td->td_samplesperpixel; + } + *va_arg(ap, uint16*) = val; + return 1; + } + return 0; + } + /* * We want to force the custom code to be used for custom * fields even if the tag happens to match a well known diff --git a/third_party/libtiff/tif_dirread.c b/third_party/libtiff/tif_dirread.c index d50b39a809..7dbcf6d86e 100644 --- a/third_party/libtiff/tif_dirread.c +++ b/third_party/libtiff/tif_dirread.c @@ -5503,8 +5503,7 @@ ChopUpSingleUncompressedStrip(TIFF* tif) uint64 rowblockbytes; uint64 stripbytes; uint32 strip; - uint64 nstrips64; - uint32 nstrips32; + uint32 nstrips; uint32 rowsperstrip; uint64* newcounts; uint64* newoffsets; @@ -5535,18 +5534,17 @@ ChopUpSingleUncompressedStrip(TIFF* tif) return; /* - * never increase the number of strips in an image + * never increase the number of rows per strip */ if (rowsperstrip >= td->td_rowsperstrip) return; - nstrips64 = TIFFhowmany_64(bytecount, stripbytes); - if ((nstrips64==0)||(nstrips64>0xFFFFFFFF)) /* something is wonky, do nothing. */ - return; - nstrips32 = (uint32)nstrips64; + nstrips = TIFFhowmany_32(td->td_imagelength, rowsperstrip); + if( nstrips == 0 ) + return; - newcounts = (uint64*) _TIFFCheckMalloc(tif, nstrips32, sizeof (uint64), + newcounts = (uint64*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint64), "for chopped \"StripByteCounts\" array"); - newoffsets = (uint64*) _TIFFCheckMalloc(tif, nstrips32, sizeof (uint64), + newoffsets = (uint64*) _TIFFCheckMalloc(tif, nstrips, sizeof (uint64), "for chopped \"StripOffsets\" array"); if (newcounts == NULL || newoffsets == NULL) { /* @@ -5563,18 +5561,18 @@ ChopUpSingleUncompressedStrip(TIFF* tif) * Fill the strip information arrays with new bytecounts and offsets * that reflect the broken-up format. */ - for (strip = 0; strip < nstrips32; strip++) { + for (strip = 0; strip < nstrips; strip++) { if (stripbytes > bytecount) stripbytes = bytecount; newcounts[strip] = stripbytes; - newoffsets[strip] = offset; + newoffsets[strip] = stripbytes ? offset : 0; offset += stripbytes; bytecount -= stripbytes; } /* * Replace old single strip info with multi-strip info. */ - td->td_stripsperimage = td->td_nstrips = nstrips32; + td->td_stripsperimage = td->td_nstrips = nstrips; TIFFSetField(tif, TIFFTAG_ROWSPERSTRIP, rowsperstrip); _TIFFfree(td->td_stripbytecount); diff --git a/third_party/libtiff/tif_luv.c b/third_party/libtiff/tif_luv.c index ca08f30a76..220c15034a 100644 --- a/third_party/libtiff/tif_luv.c +++ b/third_party/libtiff/tif_luv.c @@ -158,6 +158,7 @@ typedef struct logLuvState LogLuvState; struct logLuvState { + int encoder_state; /* 1 if encoder correctly initialized */ int user_datafmt; /* user data format */ int encode_meth; /* encoding method */ int pixel_size; /* bytes per pixel */ @@ -1552,6 +1553,7 @@ LogLuvSetupEncode(TIFF* tif) td->td_photometric, "must be either LogLUV or LogL"); break; } + sp->encoder_state = 1; return (1); notsupported: TIFFErrorExt(tif->tif_clientdata, module, @@ -1563,19 +1565,27 @@ notsupported: static void LogLuvClose(TIFF* tif) { + LogLuvState* sp = (LogLuvState*) tif->tif_data; TIFFDirectory *td = &tif->tif_dir; + assert(sp != 0); /* * For consistency, we always want to write out the same * bitspersample and sampleformat for our TIFF file, * regardless of the data format being used by the application. * Since this routine is called after tags have been set but * before they have been recorded in the file, we reset them here. + * Note: this is really a nasty approach. See PixarLogClose */ - td->td_samplesperpixel = - (td->td_photometric == PHOTOMETRIC_LOGL) ? 1 : 3; - td->td_bitspersample = 16; - td->td_sampleformat = SAMPLEFORMAT_INT; + if( sp->encoder_state ) + { + /* See PixarLogClose. Might avoid issues with tags whose size depends + * on those below, but not completely sure this is enough. */ + td->td_samplesperpixel = + (td->td_photometric == PHOTOMETRIC_LOGL) ? 1 : 3; + td->td_bitspersample = 16; + td->td_sampleformat = SAMPLEFORMAT_INT; + } } static void diff --git a/third_party/libtiff/tif_ojpeg.c b/third_party/libtiff/tif_ojpeg.c index e128887bf6..cb84be96ba 100644 --- a/third_party/libtiff/tif_ojpeg.c +++ b/third_party/libtiff/tif_ojpeg.c @@ -253,6 +253,7 @@ typedef enum { typedef struct { TIFF* tif; + int decoder_ok; #ifndef LIBJPEG_ENCAP_EXTERNAL JMP_BUF exit_jmpbuf; #endif @@ -731,6 +732,7 @@ OJPEGPreDecode(TIFF* tif, uint16 s) } sp->write_curstrile++; } + sp->decoder_ok = 1; return(1); } @@ -793,8 +795,14 @@ OJPEGPreDecodeSkipScanlines(TIFF* tif) static int OJPEGDecode(TIFF* tif, uint8* buf, tmsize_t cc, uint16 s) { + static const char module[]="OJPEGDecode"; OJPEGState* sp=(OJPEGState*)tif->tif_data; (void)s; + if( !sp->decoder_ok ) + { + TIFFErrorExt(tif->tif_clientdata,module,"Cannot decode: decoder not correctly initialized"); + return 0; + } if (sp->libjpeg_jpeg_query_style==0) { if (OJPEGDecodeRaw(tif,buf,cc)==0) diff --git a/third_party/libtiff/tif_pixarlog.c b/third_party/libtiff/tif_pixarlog.c index 8f6ca8f63c..e6574ec3df 100644 --- a/third_party/libtiff/tif_pixarlog.c +++ b/third_party/libtiff/tif_pixarlog.c @@ -1233,8 +1233,10 @@ PixarLogPostEncode(TIFF* tif) static void PixarLogClose(TIFF* tif) { + PixarLogState* sp = (PixarLogState*) tif->tif_data; TIFFDirectory *td = &tif->tif_dir; + assert(sp != 0); /* In a really sneaky (and really incorrect, and untruthful, and * troublesome, and error-prone) maneuver that completely goes against * the spirit of TIFF, and breaks TIFF, on close, we covertly @@ -1243,8 +1245,19 @@ PixarLogClose(TIFF* tif) * readers that don't know about PixarLog, or how to set * the PIXARLOGDATFMT pseudo-tag. */ - td->td_bitspersample = 8; - td->td_sampleformat = SAMPLEFORMAT_UINT; + + if (sp->state&PLSTATE_INIT) { + /* We test the state to avoid an issue such as in + * http://bugzilla.maptools.org/show_bug.cgi?id=2604 + * What appends in that case is that the bitspersample is 1 and + * a TransferFunction is set. The size of the TransferFunction + * depends on 1<td_bitspersample = 8; + td->td_sampleformat = SAMPLEFORMAT_UINT; + } } static void diff --git a/third_party/libtiff/tif_read.c b/third_party/libtiff/tif_read.c index 795153bbfe..1ba100e54c 100644 --- a/third_party/libtiff/tif_read.c +++ b/third_party/libtiff/tif_read.c @@ -346,7 +346,7 @@ TIFFReadEncodedStrip(TIFF* tif, uint32 strip, void* buf, tmsize_t size) rowsperstrip=td->td_rowsperstrip; if (rowsperstrip>td->td_imagelength) rowsperstrip=td->td_imagelength; - stripsperplane=((td->td_imagelength+rowsperstrip-1)/rowsperstrip); + stripsperplane= TIFFhowmany_32_maxuint_compat(td->td_imagelength, rowsperstrip); stripinplane=(strip%stripsperplane); plane=(uint16)(strip/stripsperplane); rows=td->td_imagelength-stripinplane*rowsperstrip; diff --git a/third_party/libtiff/tif_strip.c b/third_party/libtiff/tif_strip.c index b6098dd312..3b55285cd3 100644 --- a/third_party/libtiff/tif_strip.c +++ b/third_party/libtiff/tif_strip.c @@ -63,15 +63,6 @@ TIFFNumberOfStrips(TIFF* tif) TIFFDirectory *td = &tif->tif_dir; uint32 nstrips; - /* If the value was already computed and store in td_nstrips, then return it, - since ChopUpSingleUncompressedStrip might have altered and resized the - since the td_stripbytecount and td_stripoffset arrays to the new value - after the initial affectation of td_nstrips = TIFFNumberOfStrips() in - tif_dirread.c ~line 3612. - See http://bugzilla.maptools.org/show_bug.cgi?id=2587 */ - if( td->td_nstrips ) - return td->td_nstrips; - nstrips = (td->td_rowsperstrip == (uint32) -1 ? 1 : TIFFhowmany_32(td->td_imagelength, td->td_rowsperstrip)); if (td->td_planarconfig == PLANARCONFIG_SEPARATE) diff --git a/third_party/libtiff/tiffiop.h b/third_party/libtiff/tiffiop.h index b6db1e932c..1925a6b5e4 100644 --- a/third_party/libtiff/tiffiop.h +++ b/third_party/libtiff/tiffiop.h @@ -249,6 +249,10 @@ struct tiff { #define TIFFhowmany_32(x, y) (((uint32)x < (0xffffffff - (uint32)(y-1))) ? \ ((((uint32)(x))+(((uint32)(y))-1))/((uint32)(y))) : \ 0U) +/* Variant of TIFFhowmany_32() that doesn't return 0 if x close to MAXUINT. */ +/* Caution: TIFFhowmany_32_maxuint_compat(x,y)*y might overflow */ +#define TIFFhowmany_32_maxuint_compat(x, y) \ + (((uint32)(x) / (uint32)(y)) + ((((uint32)(x) % (uint32)(y)) != 0) ? 1 : 0)) #define TIFFhowmany8_32(x) (((x)&0x07)?((uint32)(x)>>3)+1:(uint32)(x)>>3) #define TIFFroundup_32(x, y) (TIFFhowmany_32(x,y)*(y)) #define TIFFhowmany_64(x, y) ((((uint64)(x))+(((uint64)(y))-1))/((uint64)(y))) -- cgit v1.2.3