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3rdparty(libpng): fix leak in png_handle_eXIf

Browse Source 
oss-fuzz: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=13314
ported commit: a142b7a543
This commit is contained in:
Alexander Alekhin 2019-05-28 19:39:04 +00:00
parent 43467a2ac7
commit 419a6d51b3
2 changed files with 19 additions and 4 deletions
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17
3rdparty/libpng/patches/20190528-fix-leak-png_handle_exif.diff vendored Normal file
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@ -0,0 +1,17 @@
diff --git a/3rdparty/libpng/pngrutil.c b/3rdparty/libpng/pngrutil.c
index d5fa08c397..4db3de990b 100644
--- a/3rdparty/libpng/pngrutil.c
+++ b/3rdparty/libpng/pngrutil.c
@@ -2087,10 +2087,8 @@ png_handle_eXIf(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
}
}
- if (png_crc_finish(png_ptr, 0) != 0)
- return;
-
- png_set_eXIf_1(png_ptr, info_ptr, length, info_ptr->eXIf_buf);
+ if (png_crc_finish(png_ptr, 0) == 0)
+ png_set_eXIf_1(png_ptr, info_ptr, length, info_ptr->eXIf_buf);
png_free(png_ptr, info_ptr->eXIf_buf);
info_ptr->eXIf_buf = NULL;

6
3rdparty/libpng/pngrutil.c vendored
View File

@ -2087,10 +2087,8 @@ png_handle_eXIf(png_structrp png_ptr, png_inforp info_ptr, png_uint_32 length)
}
}
if (png_crc_finish(png_ptr, 0) != 0)
return;
png_set_eXIf_1(png_ptr, info_ptr, length, info_ptr->eXIf_buf);
if (png_crc_finish(png_ptr, 0) == 0)
png_set_eXIf_1(png_ptr, info_ptr, length, info_ptr->eXIf_buf);
png_free(png_ptr, info_ptr->eXIf_buf);
info_ptr->eXIf_buf = NULL;