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| 1 | +From 818fb8ce881cf839fbc710f6690aadb992aa0f9e Mon Sep 17 00:00:00 2001 |
| 2 | +From: Su_Laus <sulau@freenet.de> |
| 3 | +Date: Fri, 1 Dec 2023 20:12:25 +0100 |
| 4 | +Subject: [PATCH] Check return value of _TIFFCreateAnonField(). |
| 5 | + |
| 6 | +Fixes #624 |
| 7 | +--- |
| 8 | + libtiff/tif_dirinfo.c | 2 +- |
| 9 | + libtiff/tif_dirread.c | 16 ++++++---------- |
| 10 | + 2 files changed, 7 insertions(+), 11 deletions(-) |
| 11 | + |
| 12 | +diff --git a/libtiff/tif_dirinfo.c b/libtiff/tif_dirinfo.c |
| 13 | +index 0e705e8..4cfdaad 100644 |
| 14 | +--- a/libtiff/tif_dirinfo.c |
| 15 | ++++ b/libtiff/tif_dirinfo.c |
| 16 | +@@ -887,7 +887,7 @@ const TIFFField *_TIFFFindOrRegisterField(TIFF *tif, uint32_t tag, |
| 17 | + if (fld == NULL) |
| 18 | + { |
| 19 | + fld = _TIFFCreateAnonField(tif, tag, dt); |
| 20 | +- if (!_TIFFMergeFields(tif, fld, 1)) |
| 21 | ++ if (fld == NULL || !_TIFFMergeFields(tif, fld, 1)) |
| 22 | + return NULL; |
| 23 | + } |
| 24 | + |
| 25 | +diff --git a/libtiff/tif_dirread.c b/libtiff/tif_dirread.c |
| 26 | +index 2c49dc6..78396c4 100644 |
| 27 | +--- a/libtiff/tif_dirread.c |
| 28 | ++++ b/libtiff/tif_dirread.c |
| 29 | +@@ -4260,11 +4260,9 @@ int TIFFReadDirectory(TIFF *tif) |
| 30 | + dp->tdir_tag, dp->tdir_tag); |
| 31 | + /* the following knowingly leaks the |
| 32 | + anonymous field structure */ |
| 33 | +- if (!_TIFFMergeFields( |
| 34 | +- tif, |
| 35 | +- _TIFFCreateAnonField(tif, dp->tdir_tag, |
| 36 | +- (TIFFDataType)dp->tdir_type), |
| 37 | +- 1)) |
| 38 | ++ const TIFFField *fld = _TIFFCreateAnonField( |
| 39 | ++ tif, dp->tdir_tag, (TIFFDataType)dp->tdir_type); |
| 40 | ++ if (fld == NULL || !_TIFFMergeFields(tif, fld, 1)) |
| 41 | + { |
| 42 | + TIFFWarningExtR( |
| 43 | + tif, module, |
| 44 | +@@ -5138,11 +5136,9 @@ int TIFFReadCustomDirectory(TIFF *tif, toff_t diroff, |
| 45 | + "Unknown field with tag %" PRIu16 " (0x%" PRIx16 |
| 46 | + ") encountered", |
| 47 | + dp->tdir_tag, dp->tdir_tag); |
| 48 | +- if (!_TIFFMergeFields( |
| 49 | +- tif, |
| 50 | +- _TIFFCreateAnonField(tif, dp->tdir_tag, |
| 51 | +- (TIFFDataType)dp->tdir_type), |
| 52 | +- 1)) |
| 53 | ++ const TIFFField *fld = _TIFFCreateAnonField( |
| 54 | ++ tif, dp->tdir_tag, (TIFFDataType)dp->tdir_type); |
| 55 | ++ if (fld == NULL || !_TIFFMergeFields(tif, fld, 1)) |
| 56 | + { |
| 57 | + TIFFWarningExtR(tif, module, |
| 58 | + "Registering anonymous field with tag %" PRIu16 |
| 59 | +-- |
| 60 | +2.34.1 |
| 61 | + |
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