diff options
Diffstat (limited to 'media-libs/tiff/files/tiff-4.0.7-bug2604.patch')
| -rw-r--r-- | media-libs/tiff/files/tiff-4.0.7-bug2604.patch | 108 |
1 files changed, 108 insertions, 0 deletions
diff --git a/media-libs/tiff/files/tiff-4.0.7-bug2604.patch b/media-libs/tiff/files/tiff-4.0.7-bug2604.patch new file mode 100644 index 000000000000..cc3f4cf3ce91 --- /dev/null +++ b/media-libs/tiff/files/tiff-4.0.7-bug2604.patch @@ -0,0 +1,108 @@ +From ebc6029128555df725e6ad77a983134350bfc831 Mon Sep 17 00:00:00 2001 +From: Even Rouault <even.rouault@spatialys.com> +Date: Fri, 2 Dec 2016 23:05:51 +0000 +Subject: [PATCH] * libtiff/tif_pixarlog.c, libtiff/tif_luv.c: fix heap-based + buffer overflow on generation of PixarLog / LUV compressed files, with + ColorMap, TransferFunction attached and nasty plays with bitspersample. The + fix for LUV has not been tested, but suffers from the same kind of issue of + PixarLog. Reported by Agostino Sarubbo. Fixes + http://bugzilla.maptools.org/show_bug.cgi?id=2604 + +--- + ChangeLog | 10 ++++++++++ + libtiff/tif_luv.c | 20 +++++++++++++++----- + libtiff/tif_pixarlog.c | 19 ++++++++++++++++--- + 3 files changed, 41 insertions(+), 8 deletions(-) + +diff --git a/libtiff/tif_luv.c b/libtiff/tif_luv.c +index ca08f30a76b6..f42ac0131fee 100644 +--- a/libtiff/tif_luv.c ++++ b/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/libtiff/tif_pixarlog.c b/libtiff/tif_pixarlog.c +index f4af2bab7ce5..9836dce63450 100644 +--- a/libtiff/tif_pixarlog.c ++++ b/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<<bitspersample. So if we increase it, an access ++ * out of the buffer will happen at directory flushing. ++ * Another option would be to clear those targs. ++ */ ++ td->td_bitspersample = 8; ++ td->td_sampleformat = SAMPLEFORMAT_UINT; ++ } + } + + static void +-- +2.12.0 + |